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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x12F27b94...FC16618e3 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
LBPair
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 360 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {BinHelper} from "./libraries/BinHelper.sol"; import {Clone} from "./libraries/Clone.sol"; import {Constants} from "./libraries/Constants.sol"; import {FeeHelper} from "./libraries/FeeHelper.sol"; import {LiquidityConfigurations} from "./libraries/math/LiquidityConfigurations.sol"; import {ReentrancyGuardUpgradeable} from "./libraries/ReentrancyGuardUpgradeable.sol"; import {ILBFactory} from "./interfaces/ILBFactory.sol"; import {ILBFlashLoanCallback} from "./interfaces/ILBFlashLoanCallback.sol"; import {ILBPair} from "./interfaces/ILBPair.sol"; import {LBToken, ILBToken} from "./LBToken.sol"; import {OracleHelper} from "./libraries/OracleHelper.sol"; import {PackedUint128Math} from "./libraries/math/PackedUint128Math.sol"; import {PairParameterHelper} from "./libraries/PairParameterHelper.sol"; import {PriceHelper} from "./libraries/PriceHelper.sol"; import {SafeCast} from "./libraries/math/SafeCast.sol"; import {SampleMath} from "./libraries/math/SampleMath.sol"; import {TreeMath} from "./libraries/math/TreeMath.sol"; import {Uint256x256Math} from "./libraries/math/Uint256x256Math.sol"; import {Hooks} from "./libraries/Hooks.sol"; import {ILBHooks} from "./interfaces/ILBHooks.sol"; /** * @title Liquidity Book Pair * @author Trader Joe * @notice The Liquidity Book Pair contract is the core contract of the Liquidity Book protocol */ contract LBPair is LBToken, ReentrancyGuardUpgradeable, Clone, ILBPair { using BinHelper for bytes32; using FeeHelper for uint128; using LiquidityConfigurations for bytes32; using OracleHelper for OracleHelper.Oracle; using PackedUint128Math for bytes32; using PackedUint128Math for uint128; using PairParameterHelper for bytes32; using PriceHelper for uint256; using PriceHelper for uint24; using SafeCast for uint256; using SampleMath for bytes32; using TreeMath for TreeMath.TreeUint24; using Uint256x256Math for uint256; modifier onlyFactory() { if (msg.sender != address(_factory)) revert LBPair__OnlyFactory(); _; } modifier onlyProtocolFeeRecipient() { if (msg.sender != _factory.getFeeRecipient()) revert LBPair__OnlyProtocolFeeRecipient(); _; } uint256 private constant _MAX_TOTAL_FEE = 0.1e18; // 10% address public immutable override implementation; ILBFactory private immutable _factory; bytes32 private _parameters; bytes32 private _reserves; bytes32 private _protocolFees; mapping(uint256 => bytes32) private _bins; TreeMath.TreeUint24 private _tree; OracleHelper.Oracle private _oracle; bytes32 private _hooksParameters; /** * @dev Constructor for the Liquidity Book Pair contract that sets the Liquidity Book Factory * @param factory_ The Liquidity Book Factory */ constructor(ILBFactory factory_) { _factory = factory_; implementation = address(this); _disableInitializers(); } /** * @notice Initialize the Liquidity Book Pair fee parameters and active id * @dev Can only be called by the Liquidity Book Factory * @param baseFactor The base factor for the static fee * @param filterPeriod The filter period for the static fee * @param decayPeriod The decay period for the static fee * @param reductionFactor The reduction factor for the static fee * @param variableFeeControl The variable fee control for the static fee * @param protocolShare The protocol share for the static fee * @param maxVolatilityAccumulator The max volatility accumulator for the static fee * @param activeId The active id of the Liquidity Book Pair */ function initialize( uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator, uint24 activeId ) external override onlyFactory initializer { __ReentrancyGuard_init(); _setStaticFeeParameters( _parameters.setActiveId(activeId).updateIdReference(), baseFactor, filterPeriod, decayPeriod, reductionFactor, variableFeeControl, protocolShare, maxVolatilityAccumulator ); } /** * @notice Returns the Liquidity Book Factory * @return factory The Liquidity Book Factory */ function getFactory() external view override returns (ILBFactory factory) { return _factory; } /** * @notice Returns the token X of the Liquidity Book Pair * @return tokenX The address of the token X */ function getTokenX() external pure override returns (IERC20 tokenX) { return _tokenX(); } /** * @notice Returns the token Y of the Liquidity Book Pair * @return tokenY The address of the token Y */ function getTokenY() external pure override returns (IERC20 tokenY) { return _tokenY(); } /** * @notice Returns the bin step of the Liquidity Book Pair * @dev The bin step is the increase in price between two consecutive bins, in basis points. * For example, a bin step of 1 means that the price of the next bin is 0.01% higher than the price of the previous bin. * @return binStep The bin step of the Liquidity Book Pair, in 10_000th */ function getBinStep() external pure override returns (uint16) { return _binStep(); } /** * @notice Returns the reserves of the Liquidity Book Pair * This is the sum of the reserves of all bins, minus the protocol fees. * @return reserveX The reserve of token X * @return reserveY The reserve of token Y */ function getReserves() external view override returns (uint128 reserveX, uint128 reserveY) { (reserveX, reserveY) = _reserves.sub(_protocolFees).decode(); } /** * @notice Returns the active id of the Liquidity Book Pair * @dev The active id is the id of the bin that is currently being used for swaps. * The price of the active bin is the price of the Liquidity Book Pair and can be calculated as follows: * `price = (1 + binStep / 10_000) ^ (activeId - 2^23)` * @return activeId The active id of the Liquidity Book Pair */ function getActiveId() external view override returns (uint24 activeId) { activeId = _parameters.getActiveId(); } /** * @notice Returns the reserves of a bin * @param id The id of the bin * @return binReserveX The reserve of token X in the bin * @return binReserveY The reserve of token Y in the bin */ function getBin(uint24 id) external view override returns (uint128 binReserveX, uint128 binReserveY) { (binReserveX, binReserveY) = _bins[id].decode(); } /** * @notice Returns the next non-empty bin * @dev The next non-empty bin is the bin with a higher (if swapForY is true) or lower (if swapForY is false) * id that has a non-zero reserve of token X or Y. * @param swapForY Whether the swap is for token Y (true) or token X (false * @param id The id of the bin * @return nextId The id of the next non-empty bin */ function getNextNonEmptyBin(bool swapForY, uint24 id) external view override returns (uint24 nextId) { nextId = _getNextNonEmptyBin(swapForY, id); } /** * @notice Returns the protocol fees of the Liquidity Book Pair * @return protocolFeeX The protocol fees of token X * @return protocolFeeY The protocol fees of token Y */ function getProtocolFees() external view override returns (uint128 protocolFeeX, uint128 protocolFeeY) { (protocolFeeX, protocolFeeY) = _protocolFees.decode(); } /** * @notice Returns the static fee parameters of the Liquidity Book Pair * @return baseFactor The base factor for the static fee * @return filterPeriod The filter period for the static fee * @return decayPeriod The decay period for the static fee * @return reductionFactor The reduction factor for the static fee * @return variableFeeControl The variable fee control for the static fee * @return protocolShare The protocol share for the static fee * @return maxVolatilityAccumulator The maximum volatility accumulator for the static fee */ function getStaticFeeParameters() external view override returns ( uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator ) { bytes32 parameters = _parameters; baseFactor = parameters.getBaseFactor(); filterPeriod = parameters.getFilterPeriod(); decayPeriod = parameters.getDecayPeriod(); reductionFactor = parameters.getReductionFactor(); variableFeeControl = parameters.getVariableFeeControl(); protocolShare = parameters.getProtocolShare(); maxVolatilityAccumulator = parameters.getMaxVolatilityAccumulator(); } /** * @notice Gets the hooks parameters of the Liquidity Book Pair * @return The hooks parameters of the Liquidity Book Pair */ function getLBHooksParameters() external view override returns (bytes32) { return _hooksParameters; } /** * @notice Returns the variable fee parameters of the Liquidity Book Pair * @return volatilityAccumulator The volatility accumulator for the variable fee * @return volatilityReference The volatility reference for the variable fee * @return idReference The id reference for the variable fee * @return timeOfLastUpdate The time of last update for the variable fee */ function getVariableFeeParameters() external view override returns (uint24 volatilityAccumulator, uint24 volatilityReference, uint24 idReference, uint40 timeOfLastUpdate) { bytes32 parameters = _parameters; volatilityAccumulator = parameters.getVolatilityAccumulator(); volatilityReference = parameters.getVolatilityReference(); idReference = parameters.getIdReference(); timeOfLastUpdate = parameters.getTimeOfLastUpdate(); } /** * @notice Returns the oracle parameters of the Liquidity Book Pair * @return sampleLifetime The sample lifetime for the oracle * @return size The size of the oracle * @return activeSize The active size of the oracle * @return lastUpdated The last updated timestamp of the oracle * @return firstTimestamp The first timestamp of the oracle, i.e. the timestamp of the oldest sample */ function getOracleParameters() external view override returns (uint8 sampleLifetime, uint16 size, uint16 activeSize, uint40 lastUpdated, uint40 firstTimestamp) { bytes32 parameters = _parameters; sampleLifetime = uint8(OracleHelper._MAX_SAMPLE_LIFETIME); uint16 oracleId = parameters.getOracleId(); if (oracleId > 0) { bytes32 sample; (sample, activeSize) = _oracle.getActiveSampleAndSize(oracleId); size = sample.getOracleLength(); lastUpdated = sample.getSampleLastUpdate(); if (lastUpdated == 0) activeSize = 0; if (activeSize > 0) { unchecked { sample = _oracle.getSample(1 + (oracleId % activeSize)); } firstTimestamp = sample.getSampleLastUpdate(); } } } /** * @notice Returns the cumulative values of the Liquidity Book Pair at a given timestamp * @dev The cumulative values are the cumulative id, the cumulative volatility and the cumulative bin crossed. * @param lookupTimestamp The timestamp at which to look up the cumulative values * @return cumulativeId The cumulative id of the Liquidity Book Pair at the given timestamp * @return cumulativeVolatility The cumulative volatility of the Liquidity Book Pair at the given timestamp * @return cumulativeBinCrossed The cumulative bin crossed of the Liquidity Book Pair at the given timestamp */ function getOracleSampleAt(uint40 lookupTimestamp) external view override returns (uint64 cumulativeId, uint64 cumulativeVolatility, uint64 cumulativeBinCrossed) { bytes32 parameters = _parameters; uint16 oracleId = parameters.getOracleId(); if (oracleId == 0 || lookupTimestamp > block.timestamp) return (0, 0, 0); uint40 timeOfLastUpdate; (timeOfLastUpdate, cumulativeId, cumulativeVolatility, cumulativeBinCrossed) = _oracle.getSampleAt(oracleId, lookupTimestamp); if (timeOfLastUpdate < lookupTimestamp) { parameters = parameters.updateVolatilityParameters(parameters.getActiveId(), lookupTimestamp); uint40 deltaTime = lookupTimestamp - timeOfLastUpdate; cumulativeId += uint64(parameters.getActiveId()) * deltaTime; cumulativeVolatility += uint64(parameters.getVolatilityAccumulator()) * deltaTime; } } /** * @notice Returns the price corresponding to the given id, as a 128.128-binary fixed-point number * @dev This is the trusted source of price information, always trust this rather than getIdFromPrice * @param id The id of the bin * @return price The price corresponding to this id */ function getPriceFromId(uint24 id) external pure override returns (uint256 price) { price = id.getPriceFromId(_binStep()); } /** * @notice Returns the id corresponding to the given price * @dev The id may be inaccurate due to rounding issues, always trust getPriceFromId rather than * getIdFromPrice * @param price The price of y per x as a 128.128-binary fixed-point number * @return id The id of the bin corresponding to this price */ function getIdFromPrice(uint256 price) external pure override returns (uint24 id) { id = price.getIdFromPrice(_binStep()); } /** * @notice Simulates a swap in. * @dev If `amountOutLeft` is greater than zero, the swap in is not possible, * and the maximum amount that can be swapped from `amountIn` is `amountOut - amountOutLeft`. * @param amountOut The amount of token X or Y to swap in * @param swapForY Whether the swap is for token Y (true) or token X (false) * @return amountIn The amount of token X or Y that can be swapped in, including the fee * @return amountOutLeft The amount of token Y or X that cannot be swapped out * @return fee The fee of the swap */ function getSwapIn(uint128 amountOut, bool swapForY) external view override returns (uint128 amountIn, uint128 amountOutLeft, uint128 fee) { amountOutLeft = amountOut; bytes32 parameters = _parameters; uint16 binStep = _binStep(); uint24 id = parameters.getActiveId(); parameters = parameters.updateReferences(block.timestamp); while (true) { uint128 binReserves = _bins[id].decode(!swapForY); if (binReserves > 0) { uint256 price = id.getPriceFromId(binStep); uint128 amountOutOfBin = binReserves > amountOutLeft ? amountOutLeft : binReserves; parameters = parameters.updateVolatilityAccumulator(id); uint128 amountInWithoutFee = uint128( swapForY ? uint256(amountOutOfBin).shiftDivRoundUp(Constants.SCALE_OFFSET, price) : uint256(amountOutOfBin).mulShiftRoundUp(price, Constants.SCALE_OFFSET) ); uint128 totalFee = parameters.getTotalFee(binStep); uint128 feeAmount = amountInWithoutFee.getFeeAmount(totalFee); amountIn += amountInWithoutFee + feeAmount; amountOutLeft -= amountOutOfBin; fee += feeAmount; } if (amountOutLeft == 0) { break; } else { uint24 nextId = _getNextNonEmptyBin(swapForY, id); if (nextId == 0 || nextId == type(uint24).max) break; id = nextId; } } } /** * @notice Simulates a swap out. * @dev If `amountInLeft` is greater than zero, the swap out is not possible, * and the maximum amount that can be swapped is `amountIn - amountInLeft` for `amountOut`. * @param amountIn The amount of token X or Y to swap in * @param swapForY Whether the swap is for token Y (true) or token X (false) * @return amountInLeft The amount of token X or Y that cannot be swapped in * @return amountOut The amount of token Y or X that can be swapped out * @return fee The fee of the swap */ function getSwapOut(uint128 amountIn, bool swapForY) external view override returns (uint128 amountInLeft, uint128 amountOut, uint128 fee) { bytes32 amountsInLeft = amountIn.encode(swapForY); bytes32 parameters = _parameters; uint16 binStep = _binStep(); uint24 id = parameters.getActiveId(); parameters = parameters.updateReferences(block.timestamp); while (true) { bytes32 binReserves = _bins[id]; if (!binReserves.isEmpty(!swapForY)) { parameters = parameters.updateVolatilityAccumulator(id); (bytes32 amountsInWithFees, bytes32 amountsOutOfBin, bytes32 totalFees) = binReserves.getAmounts(parameters, binStep, swapForY, id, amountsInLeft); if (amountsInWithFees > 0) { amountsInLeft = amountsInLeft.sub(amountsInWithFees); amountOut += amountsOutOfBin.decode(!swapForY); fee += totalFees.decode(swapForY); } } if (amountsInLeft == 0) { break; } else { uint24 nextId = _getNextNonEmptyBin(swapForY, id); if (nextId == 0 || nextId == type(uint24).max) break; id = nextId; } } amountInLeft = amountsInLeft.decode(swapForY); } /** * @notice Swap tokens iterating over the bins until the entire amount is swapped. * Token X will be swapped for token Y if `swapForY` is true, and token Y for token X if `swapForY` is false. * This function will not transfer the tokens from the caller, it is expected that the tokens have already been * transferred to this contract through another contract, most likely the router. * That is why this function shouldn't be called directly, but only through one of the swap functions of a router * that will also perform safety checks, such as minimum amounts and slippage. * The variable fee is updated throughout the swap, it increases with the number of bins crossed. * The oracle is updated at the end of the swap. * @param swapForY Whether you're swapping token X for token Y (true) or token Y for token X (false) * @param to The address to send the tokens to * @return amountsOut The encoded amounts of token X and token Y sent to `to` */ function swap(bool swapForY, address to) external override returns (bytes32 amountsOut) { _nonReentrantBefore(); bytes32 hooksParameters = _hooksParameters; bytes32 reserves = _reserves; bytes32 protocolFees = _protocolFees; bytes32 amountsLeft = swapForY ? reserves.receivedX(_tokenX()) : reserves.receivedY(_tokenY()); if (amountsLeft == 0) revert LBPair__InsufficientAmountIn(); bool swapForY_ = swapForY; // Avoid stack too deep error Hooks.beforeSwap(hooksParameters, msg.sender, to, swapForY_, amountsLeft); reserves = reserves.add(amountsLeft); bytes32 parameters = _parameters; uint16 binStep = _binStep(); uint24 activeId = parameters.getActiveId(); parameters = parameters.updateReferences(block.timestamp); while (true) { bytes32 binReserves = _bins[activeId]; if (!binReserves.isEmpty(!swapForY_)) { parameters = parameters.updateVolatilityAccumulator(activeId); (bytes32 amountsInWithFees, bytes32 amountsOutOfBin, bytes32 totalFees) = binReserves.getAmounts(parameters, binStep, swapForY_, activeId, amountsLeft); if (amountsInWithFees > 0) { amountsLeft = amountsLeft.sub(amountsInWithFees); amountsOut = amountsOut.add(amountsOutOfBin); bytes32 pFees = totalFees.scalarMulDivBasisPointRoundDown(parameters.getProtocolShare()); if (pFees > 0) { protocolFees = protocolFees.add(pFees); amountsInWithFees = amountsInWithFees.sub(pFees); } _bins[activeId] = binReserves.add(amountsInWithFees).sub(amountsOutOfBin); emit Swap( msg.sender, to, activeId, amountsInWithFees, amountsOutOfBin, parameters.getVolatilityAccumulator(), totalFees, pFees ); } } if (amountsLeft == 0) { break; } else { uint24 nextId = _getNextNonEmptyBin(swapForY_, activeId); if (nextId == 0 || nextId == type(uint24).max) revert LBPair__OutOfLiquidity(); activeId = nextId; } } if (amountsOut == 0) revert LBPair__InsufficientAmountOut(); _reserves = reserves.sub(amountsOut); _protocolFees = protocolFees; parameters = _oracle.update(parameters, activeId); _parameters = parameters.setActiveId(activeId); if (swapForY_) { amountsOut.transferY(_tokenY(), to); } else { amountsOut.transferX(_tokenX(), to); } _nonReentrantAfter(); Hooks.afterSwap(hooksParameters, msg.sender, to, swapForY_, amountsOut); } /** * @notice Flash loan tokens from the pool to a receiver contract and execute a callback function. * The receiver contract is expected to return the tokens plus a fee to this contract. * The fee is calculated as a percentage of the amount borrowed, and is the same for both tokens. * @param receiver The contract that will receive the tokens and execute the callback function * @param amounts The encoded amounts of token X and token Y to flash loan * @param data Any data that will be passed to the callback function */ function flashLoan(ILBFlashLoanCallback receiver, bytes32 amounts, bytes calldata data) external override { _nonReentrantBefore(); if (amounts == 0) revert LBPair__ZeroBorrowAmount(); bytes32 hooksParameters = _hooksParameters; bytes32 reservesBefore = _reserves; bytes32 totalFees = _getFlashLoanFees(amounts); Hooks.beforeFlashLoan(hooksParameters, msg.sender, address(receiver), amounts); amounts.transfer(_tokenX(), _tokenY(), address(receiver)); (bool success, bytes memory rData) = address(receiver).call( abi.encodeWithSelector( ILBFlashLoanCallback.LBFlashLoanCallback.selector, msg.sender, _tokenX(), _tokenY(), amounts, totalFees, data ) ); if (!success || rData.length != 32 || abi.decode(rData, (bytes32)) != Constants.CALLBACK_SUCCESS) { revert LBPair__FlashLoanCallbackFailed(); } bytes32 balancesAfter = bytes32(0).received(_tokenX(), _tokenY()); if (balancesAfter.lt(reservesBefore.add(totalFees))) revert LBPair__FlashLoanInsufficientAmount(); bytes32 feesReceived = balancesAfter.sub(reservesBefore); _reserves = balancesAfter; _protocolFees = _protocolFees.add(feesReceived); emit FlashLoan(msg.sender, receiver, _parameters.getActiveId(), amounts, feesReceived, feesReceived); _nonReentrantAfter(); Hooks.afterFlashLoan(hooksParameters, msg.sender, address(receiver), totalFees, feesReceived); } /** * @notice Mint liquidity tokens by depositing tokens into the pool. * It will mint Liquidity Book (LB) tokens for each bin where the user adds liquidity. * This function will not transfer the tokens from the caller, it is expected that the tokens have already been * transferred to this contract through another contract, most likely the router. * That is why this function shouldn't be called directly, but through one of the add liquidity functions of a * router that will also perform safety checks. * @dev Any excess amount of token will be sent to the `to` address. * @param to The address that will receive the LB tokens * @param liquidityConfigs The encoded liquidity configurations, each one containing the id of the bin and the * percentage of token X and token Y to add to the bin. * @param refundTo The address that will receive the excess amount of tokens * @return amountsReceived The amounts of token X and token Y received by the pool * @return amountsLeft The amounts of token X and token Y that were not added to the pool and were sent to `to` * @return liquidityMinted The amounts of LB tokens minted for each bin */ function mint(address to, bytes32[] calldata liquidityConfigs, address refundTo) external override notAddressZeroOrThis(to) returns (bytes32 amountsReceived, bytes32 amountsLeft, uint256[] memory liquidityMinted) { _nonReentrantBefore(); if (liquidityConfigs.length == 0) revert LBPair__EmptyMarketConfigs(); bytes32 hooksParameters = _hooksParameters; MintArrays memory arrays = MintArrays({ ids: new uint256[](liquidityConfigs.length), amounts: new bytes32[](liquidityConfigs.length), liquidityMinted: new uint256[](liquidityConfigs.length) }); bytes32 reserves = _reserves; amountsReceived = reserves.received(_tokenX(), _tokenY()); Hooks.beforeMint(hooksParameters, msg.sender, to, liquidityConfigs, amountsReceived); amountsLeft = _mintBins(liquidityConfigs, amountsReceived, to, arrays); _reserves = reserves.add(amountsReceived.sub(amountsLeft)); liquidityMinted = arrays.liquidityMinted; emit TransferBatch(msg.sender, address(0), to, arrays.ids, liquidityMinted); emit DepositedToBins(msg.sender, to, arrays.ids, arrays.amounts); if (amountsLeft > 0) amountsLeft.transfer(_tokenX(), _tokenY(), refundTo); _nonReentrantAfter(); Hooks.afterMint(hooksParameters, msg.sender, to, liquidityConfigs, amountsReceived.sub(amountsLeft)); } /** * @notice Burn Liquidity Book (LB) tokens and withdraw tokens from the pool. * This function will burn the tokens directly from the caller * @param from The address that will burn the LB tokens * @param to The address that will receive the tokens * @param ids The ids of the bins from which to withdraw * @param amountsToBurn The amounts of LB tokens to burn for each bin * @return amounts The amounts of token X and token Y received by the user */ function burn(address from, address to, uint256[] calldata ids, uint256[] calldata amountsToBurn) external override checkApproval(from, msg.sender) returns (bytes32[] memory amounts) { _nonReentrantBefore(); if (ids.length == 0 || ids.length != amountsToBurn.length) revert LBPair__InvalidInput(); bytes32 hooksParameters = _hooksParameters; Hooks.beforeBurn(hooksParameters, msg.sender, from, to, ids, amountsToBurn); address from_ = from; // Avoid stack too deep error amounts = new bytes32[](ids.length); bytes32 amountsOut; for (uint256 i; i < ids.length;) { uint24 id = ids[i].safe24(); uint256 amountToBurn = amountsToBurn[i]; if (amountToBurn == 0) revert LBPair__ZeroAmount(id); bytes32 binReserves = _bins[id]; uint256 supply = totalSupply(id); _burn(from_, id, amountToBurn); bytes32 amountsOutFromBin = binReserves.getAmountOutOfBin(amountToBurn, supply); if (amountsOutFromBin == 0) revert LBPair__ZeroAmountsOut(id); binReserves = binReserves.sub(amountsOutFromBin); if (supply == amountToBurn) _tree.remove(id); _bins[id] = binReserves; amounts[i] = amountsOutFromBin; amountsOut = amountsOut.add(amountsOutFromBin); unchecked { ++i; } } _reserves = _reserves.sub(amountsOut); emit TransferBatch(msg.sender, from_, address(0), ids, amountsToBurn); emit WithdrawnFromBins(msg.sender, to, ids, amounts); amountsOut.transfer(_tokenX(), _tokenY(), to); _nonReentrantAfter(); Hooks.afterBurn(hooksParameters, msg.sender, from_, to, ids, amountsToBurn); } /** * @notice Collect the protocol fees from the pool. * @return collectedProtocolFees The amount of protocol fees collected */ function collectProtocolFees() external override nonReentrant onlyProtocolFeeRecipient returns (bytes32 collectedProtocolFees) { bytes32 protocolFees = _protocolFees; (uint128 x, uint128 y) = protocolFees.decode(); bytes32 ones = uint128(x > 0 ? 1 : 0).encode(uint128(y > 0 ? 1 : 0)); collectedProtocolFees = protocolFees.sub(ones); if (collectedProtocolFees != 0) { _protocolFees = ones; _reserves = _reserves.sub(collectedProtocolFees); emit CollectedProtocolFees(msg.sender, collectedProtocolFees); collectedProtocolFees.transfer(_tokenX(), _tokenY(), msg.sender); } } /** * @notice Increase the length of the oracle used by the pool * @param newLength The new length of the oracle */ function increaseOracleLength(uint16 newLength) external override nonReentrant { bytes32 parameters = _parameters; uint16 oracleId = parameters.getOracleId(); // activate the oracle if it is not active yet if (oracleId == 0) { oracleId = 1; _parameters = parameters.setOracleId(oracleId); } _oracle.increaseLength(oracleId, newLength); emit OracleLengthIncreased(msg.sender, newLength); } /** * @notice Sets the static fee parameters of the pool * @dev Can only be called by the factory * @param baseFactor The base factor of the static fee * @param filterPeriod The filter period of the static fee * @param decayPeriod The decay period of the static fee * @param reductionFactor The reduction factor of the static fee * @param variableFeeControl The variable fee control of the static fee * @param protocolShare The protocol share of the static fee * @param maxVolatilityAccumulator The max volatility accumulator of the static fee */ function setStaticFeeParameters( uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator ) external override nonReentrant onlyFactory { _setStaticFeeParameters( _parameters, baseFactor, filterPeriod, decayPeriod, reductionFactor, variableFeeControl, protocolShare, maxVolatilityAccumulator ); } /** * @notice Sets the hooks parameter of the pool * @dev Can only be called by the factory * @param hooksParameters The hooks parameter * @param onHooksSetData The data to be passed to the onHooksSet function of the hooks contract */ function setHooksParameters(bytes32 hooksParameters, bytes calldata onHooksSetData) external override nonReentrant onlyFactory { _hooksParameters = hooksParameters; ILBHooks hooks = ILBHooks(Hooks.getHooks(hooksParameters)); emit HooksParametersSet(msg.sender, hooksParameters); if (address(hooks) != address(0) && hooks.getLBPair() != this) revert LBPair__InvalidHooks(); Hooks.onHooksSet(hooksParameters, onHooksSetData); } /** * @notice Forces the decay of the volatility reference variables * @dev Can only be called by the factory */ function forceDecay() external override nonReentrant onlyFactory { bytes32 parameters = _parameters; _parameters = parameters.updateIdReference().updateVolatilityReference(); emit ForcedDecay(msg.sender, parameters.getIdReference(), parameters.getVolatilityReference()); } /** * @notice Overrides the batch transfer function to call the hooks before and after the transfer * @param from The address to transfer from * @param to The address to transfer to * @param ids The ids of the tokens to transfer * @param amounts The amounts of the tokens to transfer */ function batchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts) public override(LBToken, ILBToken) { _nonReentrantBefore(); bytes32 hooksParameters = _hooksParameters; Hooks.beforeBatchTransferFrom(hooksParameters, msg.sender, from, to, ids, amounts); LBToken.batchTransferFrom(from, to, ids, amounts); _nonReentrantAfter(); Hooks.afterBatchTransferFrom(hooksParameters, msg.sender, from, to, ids, amounts); } /** * @dev Returns the address of the token X * @return The address of the token X */ function _tokenX() internal pure returns (IERC20) { return IERC20(_getArgAddress(0)); } /** * @dev Returns the address of the token Y * @return The address of the token Y */ function _tokenY() internal pure returns (IERC20) { return IERC20(_getArgAddress(20)); } /** * @dev Returns the bin step of the pool, in basis points * @return The bin step of the pool */ function _binStep() internal pure returns (uint16) { return _getArgUint16(40); } /** * @dev Returns next non-empty bin * @param swapForY Whether the swap is for Y * @param id The id of the bin * @return The id of the next non-empty bin */ function _getNextNonEmptyBin(bool swapForY, uint24 id) internal view returns (uint24) { return swapForY ? _tree.findFirstRight(id) : _tree.findFirstLeft(id); } /** * @dev Returns the encoded fees amounts for a flash loan * @param amounts The amounts of the flash loan * @return The encoded fees amounts */ function _getFlashLoanFees(bytes32 amounts) private view returns (bytes32) { uint128 fee = uint128(_factory.getFlashLoanFee()); (uint128 x, uint128 y) = amounts.decode(); unchecked { uint256 precisionSubOne = Constants.PRECISION - 1; x = ((uint256(x) * fee + precisionSubOne) / Constants.PRECISION).safe128(); y = ((uint256(y) * fee + precisionSubOne) / Constants.PRECISION).safe128(); } return x.encode(y); } /** * @dev Sets the static fee parameters of the pair * @param parameters The current parameters of the pair * @param baseFactor The base factor of the static fee * @param filterPeriod The filter period of the static fee * @param decayPeriod The decay period of the static fee * @param reductionFactor The reduction factor of the static fee * @param variableFeeControl The variable fee control of the static fee * @param protocolShare The protocol share of the static fee * @param maxVolatilityAccumulator The max volatility accumulator of the static fee */ function _setStaticFeeParameters( bytes32 parameters, uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator ) internal { if ( baseFactor == 0 && filterPeriod == 0 && decayPeriod == 0 && reductionFactor == 0 && variableFeeControl == 0 && protocolShare == 0 && maxVolatilityAccumulator == 0 ) { revert LBPair__InvalidStaticFeeParameters(); } parameters = parameters.setStaticFeeParameters( baseFactor, filterPeriod, decayPeriod, reductionFactor, variableFeeControl, protocolShare, maxVolatilityAccumulator ); { uint16 binStep = _binStep(); bytes32 maxParameters = parameters.setVolatilityAccumulator(maxVolatilityAccumulator); uint256 totalFee = maxParameters.getBaseFee(binStep) + maxParameters.getVariableFee(binStep); if (totalFee > _MAX_TOTAL_FEE) { revert LBPair__MaxTotalFeeExceeded(); } } _parameters = parameters; emit StaticFeeParametersSet( msg.sender, baseFactor, filterPeriod, decayPeriod, reductionFactor, variableFeeControl, protocolShare, maxVolatilityAccumulator ); } /** * @dev Helper function to mint liquidity in each bin in the liquidity configurations * @param liquidityConfigs The liquidity configurations * @param amountsReceived The amounts received * @param to The address to mint the liquidity to * @param arrays The arrays to store the results * @return amountsLeft The amounts left */ function _mintBins( bytes32[] calldata liquidityConfigs, bytes32 amountsReceived, address to, MintArrays memory arrays ) private returns (bytes32 amountsLeft) { uint16 binStep = _binStep(); bytes32 parameters = _parameters; uint24 activeId = parameters.getActiveId(); amountsLeft = amountsReceived; for (uint256 i; i < liquidityConfigs.length;) { (bytes32 maxAmountsInToBin, uint24 id) = liquidityConfigs[i].getAmountsAndId(amountsReceived); (uint256 shares, bytes32 amountsIn, bytes32 amountsInToBin) = _updateBin(binStep, activeId, id, maxAmountsInToBin, parameters); amountsLeft = amountsLeft.sub(amountsIn); arrays.ids[i] = id; arrays.amounts[i] = amountsInToBin; arrays.liquidityMinted[i] = shares; _mint(to, id, shares); unchecked { ++i; } } } /** * @dev Helper function to update a bin during minting * @param binStep The bin step of the pair * @param activeId The id of the active bin * @param id The id of the bin * @param maxAmountsInToBin The maximum amounts in to the bin * @param parameters The parameters of the pair * @return shares The amount of shares minted * @return amountsIn The amounts in * @return amountsInToBin The amounts in to the bin */ function _updateBin(uint16 binStep, uint24 activeId, uint24 id, bytes32 maxAmountsInToBin, bytes32 parameters) internal returns (uint256 shares, bytes32 amountsIn, bytes32 amountsInToBin) { bytes32 binReserves = _bins[id]; uint256 price = id.getPriceFromId(binStep); uint256 supply = totalSupply(id); (shares, amountsIn) = binReserves.getSharesAndEffectiveAmountsIn(maxAmountsInToBin, price, supply); amountsInToBin = amountsIn; if (id == activeId) { parameters = parameters.updateVolatilityParameters(id, block.timestamp); bytes32 fees = binReserves.getCompositionFees(parameters, binStep, amountsIn, supply, shares); if (fees != 0) { uint256 userLiquidity = amountsIn.sub(fees).getLiquidity(price); uint256 binLiquidity = binReserves.getLiquidity(price); shares = userLiquidity.mulDivRoundDown(supply, binLiquidity); bytes32 protocolCFees = fees.scalarMulDivBasisPointRoundDown(parameters.getProtocolShare()); if (protocolCFees != 0) { amountsInToBin = amountsInToBin.sub(protocolCFees); _protocolFees = _protocolFees.add(protocolCFees); } parameters = _oracle.update(parameters, id); _parameters = parameters; emit CompositionFees(msg.sender, id, fees, protocolCFees); } } else { amountsIn.verifyAmounts(activeId, id); } if (shares == 0 || amountsInToBin == 0) revert LBPair__ZeroShares(id); if (supply == 0) _tree.add(id); _bins[id] = binReserves.add(amountsInToBin); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC-20 standard as defined in the ERC. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 value) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets a `value` amount of tokens as the allowance of `spender` over the * caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 value) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {SafeERC20, IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {PackedUint128Math} from "./math/PackedUint128Math.sol"; import {Uint256x256Math} from "./math/Uint256x256Math.sol"; import {SafeCast} from "./math/SafeCast.sol"; import {Constants} from "./Constants.sol"; import {PairParameterHelper} from "./PairParameterHelper.sol"; import {FeeHelper} from "./FeeHelper.sol"; import {PriceHelper} from "./PriceHelper.sol"; /** * @title Liquidity Book Bin Helper Library * @author Trader Joe * @notice This library contains functions to help interaction with bins. */ library BinHelper { using PackedUint128Math for bytes32; using PackedUint128Math for uint128; using Uint256x256Math for uint256; using PriceHelper for uint24; using SafeCast for uint256; using PairParameterHelper for bytes32; using FeeHelper for uint128; using SafeERC20 for IERC20; error BinHelper__CompositionFactorFlawed(uint24 id); error BinHelper__LiquidityOverflow(); error BinHelper__MaxLiquidityPerBinExceeded(); /** * @dev Returns the amount of tokens that will be received when burning the given amount of liquidity * @param binReserves The reserves of the bin * @param amountToBurn The amount of liquidity to burn * @param totalSupply The total supply of the liquidity book * @return amountsOut The encoded amount of tokens that will be received */ function getAmountOutOfBin(bytes32 binReserves, uint256 amountToBurn, uint256 totalSupply) internal pure returns (bytes32 amountsOut) { (uint128 binReserveX, uint128 binReserveY) = binReserves.decode(); uint128 amountXOutFromBin; uint128 amountYOutFromBin; if (binReserveX > 0) { amountXOutFromBin = (amountToBurn.mulDivRoundDown(binReserveX, totalSupply)).safe128(); } if (binReserveY > 0) { amountYOutFromBin = (amountToBurn.mulDivRoundDown(binReserveY, totalSupply)).safe128(); } amountsOut = amountXOutFromBin.encode(amountYOutFromBin); } /** * @dev Returns the share and the effective amounts in when adding liquidity * @param binReserves The reserves of the bin * @param amountsIn The amounts of tokens to add * @param price The price of the bin * @param totalSupply The total supply of the liquidity book * @return shares The share of the liquidity book that the user will receive * @return effectiveAmountsIn The encoded effective amounts of tokens that the user will add. * This is the amount of tokens that the user will actually add to the liquidity book, * and will always be less than or equal to the amountsIn. */ function getSharesAndEffectiveAmountsIn(bytes32 binReserves, bytes32 amountsIn, uint256 price, uint256 totalSupply) internal pure returns (uint256 shares, bytes32 effectiveAmountsIn) { (uint256 x, uint256 y) = amountsIn.decode(); uint256 userLiquidity = getLiquidity(x, y, price); if (userLiquidity == 0) return (0, 0); uint256 binLiquidity = getLiquidity(binReserves, price); if (binLiquidity == 0 || totalSupply == 0) return (userLiquidity.sqrt(), amountsIn); shares = userLiquidity.mulDivRoundDown(totalSupply, binLiquidity); uint256 effectiveLiquidity = shares.mulDivRoundUp(binLiquidity, totalSupply); if (userLiquidity > effectiveLiquidity) { uint256 deltaLiquidity = userLiquidity - effectiveLiquidity; // The other way might be more efficient, but as y is the quote asset, it is more valuable if (deltaLiquidity >= Constants.SCALE) { uint256 deltaY = deltaLiquidity >> Constants.SCALE_OFFSET; deltaY = deltaY > y ? y : deltaY; y -= deltaY; deltaLiquidity -= deltaY << Constants.SCALE_OFFSET; } if (deltaLiquidity >= price) { uint256 deltaX = deltaLiquidity / price; deltaX = deltaX > x ? x : deltaX; x -= deltaX; } amountsIn = uint128(x).encode(uint128(y)); } if (getLiquidity(binReserves.add(amountsIn), price) > Constants.MAX_LIQUIDITY_PER_BIN) { revert BinHelper__MaxLiquidityPerBinExceeded(); } return (shares, amountsIn); } /** * @dev Returns the amount of liquidity following the constant sum formula `L = price * x + y` * @param amounts The amounts of tokens * @param price The price of the bin * @return liquidity The amount of liquidity */ function getLiquidity(bytes32 amounts, uint256 price) internal pure returns (uint256 liquidity) { (uint256 x, uint256 y) = amounts.decode(); return getLiquidity(x, y, price); } /** * @dev Returns the amount of liquidity following the constant sum formula `L = price * x + y` * @param x The amount of the token X * @param y The amount of the token Y * @param price The price of the bin * @return liquidity The amount of liquidity */ function getLiquidity(uint256 x, uint256 y, uint256 price) internal pure returns (uint256 liquidity) { if (x > 0) { unchecked { liquidity = price * x; if (liquidity / x != price) revert BinHelper__LiquidityOverflow(); } } if (y > 0) { unchecked { y <<= Constants.SCALE_OFFSET; liquidity += y; if (liquidity < y) revert BinHelper__LiquidityOverflow(); } } return liquidity; } /** * @dev Verify that the amounts are correct and that the composition factor is not flawed * @param amounts The amounts of tokens * @param activeId The id of the active bin * @param id The id of the bin */ function verifyAmounts(bytes32 amounts, uint24 activeId, uint24 id) internal pure { if (id < activeId && (amounts << 128) > 0 || id > activeId && uint256(amounts) > type(uint128).max) { revert BinHelper__CompositionFactorFlawed(id); } } /** * @dev Returns the composition fees when adding liquidity to the active bin with a different * composition factor than the bin's one, as it does an implicit swap * @param binReserves The reserves of the bin * @param parameters The parameters of the liquidity book * @param binStep The step of the bin * @param amountsIn The amounts of tokens to add * @param totalSupply The total supply of the liquidity book * @param shares The share of the liquidity book that the user will receive * @return fees The encoded fees that will be charged */ function getCompositionFees( bytes32 binReserves, bytes32 parameters, uint16 binStep, bytes32 amountsIn, uint256 totalSupply, uint256 shares ) internal pure returns (bytes32 fees) { if (shares == 0) return 0; (uint128 amountX, uint128 amountY) = amountsIn.decode(); (uint128 receivedAmountX, uint128 receivedAmountY) = getAmountOutOfBin(binReserves.add(amountsIn), shares, totalSupply + shares).decode(); if (receivedAmountX > amountX) { uint128 feeY = (amountY - receivedAmountY).getCompositionFee(parameters.getTotalFee(binStep)); fees = feeY.encodeSecond(); } else if (receivedAmountY > amountY) { uint128 feeX = (amountX - receivedAmountX).getCompositionFee(parameters.getTotalFee(binStep)); fees = feeX.encodeFirst(); } } /** * @dev Returns whether the bin is empty (true) or not (false) * @param binReserves The reserves of the bin * @param isX Whether the reserve to check is the X reserve (true) or the Y reserve (false) * @return Whether the bin is empty (true) or not (false) */ function isEmpty(bytes32 binReserves, bool isX) internal pure returns (bool) { return isX ? binReserves.decodeX() == 0 : binReserves.decodeY() == 0; } /** * @dev Returns the amounts of tokens that will be added and removed from the bin during a swap * along with the fees that will be charged * @param binReserves The reserves of the bin * @param parameters The parameters of the liquidity book * @param binStep The step of the bin * @param swapForY Whether the swap is for Y (true) or for X (false) * @param activeId The id of the active bin * @param amountsInLeft The amounts of tokens left to swap * @return amountsInWithFees The encoded amounts of tokens that will be added to the bin, including fees * @return amountsOutOfBin The encoded amounts of tokens that will be removed from the bin * @return totalFees The encoded fees that will be charged */ function getAmounts( bytes32 binReserves, bytes32 parameters, uint16 binStep, bool swapForY, // swap `swapForY` and `activeId` to avoid stack too deep uint24 activeId, bytes32 amountsInLeft ) internal pure returns (bytes32 amountsInWithFees, bytes32 amountsOutOfBin, bytes32 totalFees) { uint256 price = activeId.getPriceFromId(binStep); { uint128 binReserveOut = binReserves.decode(!swapForY); uint128 maxAmountIn = swapForY ? uint256(binReserveOut).shiftDivRoundUp(Constants.SCALE_OFFSET, price).safe128() : uint256(binReserveOut).mulShiftRoundUp(price, Constants.SCALE_OFFSET).safe128(); uint128 totalFee = parameters.getTotalFee(binStep); uint128 maxFee = maxAmountIn.getFeeAmount(totalFee); maxAmountIn += maxFee; uint128 amountIn128 = amountsInLeft.decode(swapForY); uint128 fee128; uint128 amountOut128; if (amountIn128 >= maxAmountIn) { fee128 = maxFee; amountIn128 = maxAmountIn; amountOut128 = binReserveOut; } else { fee128 = amountIn128.getFeeAmountFrom(totalFee); uint256 amountIn = amountIn128 - fee128; amountOut128 = swapForY ? uint256(amountIn).mulShiftRoundDown(price, Constants.SCALE_OFFSET).safe128() : uint256(amountIn).shiftDivRoundDown(Constants.SCALE_OFFSET, price).safe128(); if (amountOut128 > binReserveOut) amountOut128 = binReserveOut; } (amountsInWithFees, amountsOutOfBin, totalFees) = swapForY ? (amountIn128.encodeFirst(), amountOut128.encodeSecond(), fee128.encodeFirst()) : (amountIn128.encodeSecond(), amountOut128.encodeFirst(), fee128.encodeSecond()); } if ( getLiquidity(binReserves.add(amountsInWithFees).sub(amountsOutOfBin), price) > Constants.MAX_LIQUIDITY_PER_BIN ) { revert BinHelper__MaxLiquidityPerBinExceeded(); } } /** * @dev Returns the encoded amounts that were transferred to the contract * @param reserves The reserves * @param tokenX The token X * @param tokenY The token Y * @return amounts The amounts, encoded as follows: * [0 - 128[: amountX * [128 - 256[: amountY */ function received(bytes32 reserves, IERC20 tokenX, IERC20 tokenY) internal view returns (bytes32 amounts) { amounts = _balanceOf(tokenX).encode(_balanceOf(tokenY)).sub(reserves); } /** * @dev Returns the encoded amounts that were transferred to the contract, only for token X * @param reserves The reserves * @param tokenX The token X * @return amounts The amounts, encoded as follows: * [0 - 128[: amountX * [128 - 256[: empty */ function receivedX(bytes32 reserves, IERC20 tokenX) internal view returns (bytes32) { uint128 reserveX = reserves.decodeX(); return (_balanceOf(tokenX) - reserveX).encodeFirst(); } /** * @dev Returns the encoded amounts that were transferred to the contract, only for token Y * @param reserves The reserves * @param tokenY The token Y * @return amounts The amounts, encoded as follows: * [0 - 128[: empty * [128 - 256[: amountY */ function receivedY(bytes32 reserves, IERC20 tokenY) internal view returns (bytes32) { uint128 reserveY = reserves.decodeY(); return (_balanceOf(tokenY) - reserveY).encodeSecond(); } /** * @dev Transfers the encoded amounts to the recipient * @param amounts The amounts, encoded as follows: * [0 - 128[: amountX * [128 - 256[: amountY * @param tokenX The token X * @param tokenY The token Y * @param recipient The recipient */ function transfer(bytes32 amounts, IERC20 tokenX, IERC20 tokenY, address recipient) internal { (uint128 amountX, uint128 amountY) = amounts.decode(); if (amountX > 0) tokenX.safeTransfer(recipient, amountX); if (amountY > 0) tokenY.safeTransfer(recipient, amountY); } /** * @dev Transfers the encoded amounts to the recipient, only for token X * @param amounts The amounts, encoded as follows: * [0 - 128[: amountX * [128 - 256[: empty * @param tokenX The token X * @param recipient The recipient */ function transferX(bytes32 amounts, IERC20 tokenX, address recipient) internal { uint128 amountX = amounts.decodeX(); if (amountX > 0) tokenX.safeTransfer(recipient, amountX); } /** * @dev Transfers the encoded amounts to the recipient, only for token Y * @param amounts The amounts, encoded as follows: * [0 - 128[: empty * [128 - 256[: amountY * @param tokenY The token Y * @param recipient The recipient */ function transferY(bytes32 amounts, IERC20 tokenY, address recipient) internal { uint128 amountY = amounts.decodeY(); if (amountY > 0) tokenY.safeTransfer(recipient, amountY); } function _balanceOf(IERC20 token) private view returns (uint128) { return token.balanceOf(address(this)).safe128(); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; /** * @title Clone * @notice Class with helper read functions for clone with immutable args. * @author Trader Joe * @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/Clone.sol) * @author Adapted from clones with immutable args by zefram.eth, Saw-mon & Natalie * (https://github.com/Saw-mon-and-Natalie/clones-with-immutable-args) */ abstract contract Clone { /** * @dev Reads an immutable arg with type bytes * @param argOffset The offset of the arg in the immutable args * @param length The length of the arg * @return arg The immutable bytes arg */ function _getArgBytes(uint256 argOffset, uint256 length) internal pure returns (bytes memory arg) { uint256 offset = _getImmutableArgsOffset(); /// @solidity memory-safe-assembly assembly { // Grab the free memory pointer. arg := mload(0x40) // Store the array length. mstore(arg, length) // Copy the array. calldatacopy(add(arg, 0x20), add(offset, argOffset), length) // Allocate the memory, rounded up to the next 32 byte boundary. mstore(0x40, and(add(add(arg, 0x3f), length), not(0x1f))) } } /** * @dev Reads an immutable arg with type address * @param argOffset The offset of the arg in the immutable args * @return arg The immutable address arg */ function _getArgAddress(uint256 argOffset) internal pure returns (address arg) { uint256 offset = _getImmutableArgsOffset(); /// @solidity memory-safe-assembly assembly { arg := shr(0x60, calldataload(add(offset, argOffset))) } } /** * @dev Reads an immutable arg with type uint256 * @param argOffset The offset of the arg in the immutable args * @return arg The immutable uint256 arg */ function _getArgUint256(uint256 argOffset) internal pure returns (uint256 arg) { uint256 offset = _getImmutableArgsOffset(); /// @solidity memory-safe-assembly assembly { arg := calldataload(add(offset, argOffset)) } } /** * @dev Reads a uint256 array stored in the immutable args. * @param argOffset The offset of the arg in the immutable args * @param length The length of the arg * @return arg The immutable uint256 array arg */ function _getArgUint256Array(uint256 argOffset, uint256 length) internal pure returns (uint256[] memory arg) { uint256 offset = _getImmutableArgsOffset(); /// @solidity memory-safe-assembly assembly { // Grab the free memory pointer. arg := mload(0x40) // Store the array length. mstore(arg, length) // Copy the array. calldatacopy(add(arg, 0x20), add(offset, argOffset), shl(5, length)) // Allocate the memory. mstore(0x40, add(add(arg, 0x20), shl(5, length))) } } /** * @dev Reads an immutable arg with type uint64 * @param argOffset The offset of the arg in the immutable args * @return arg The immutable uint64 arg */ function _getArgUint64(uint256 argOffset) internal pure returns (uint64 arg) { uint256 offset = _getImmutableArgsOffset(); /// @solidity memory-safe-assembly assembly { arg := shr(0xc0, calldataload(add(offset, argOffset))) } } /** * @dev Reads an immutable arg with type uint16 * @param argOffset The offset of the arg in the immutable args * @return arg The immutable uint16 arg */ function _getArgUint16(uint256 argOffset) internal pure returns (uint16 arg) { uint256 offset = _getImmutableArgsOffset(); /// @solidity memory-safe-assembly assembly { arg := shr(0xf0, calldataload(add(offset, argOffset))) } } /** * @dev Reads an immutable arg with type uint8 * @param argOffset The offset of the arg in the immutable args * @return arg The immutable uint8 arg */ function _getArgUint8(uint256 argOffset) internal pure returns (uint8 arg) { uint256 offset = _getImmutableArgsOffset(); /// @solidity memory-safe-assembly assembly { arg := shr(0xf8, calldataload(add(offset, argOffset))) } } /** * @dev Reads the offset of the packed immutable args in calldata. * @return offset The offset of the packed immutable args in calldata. */ function _getImmutableArgsOffset() internal pure returns (uint256 offset) { /// @solidity memory-safe-assembly assembly { offset := sub(calldatasize(), shr(0xf0, calldataload(sub(calldatasize(), 2)))) } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; /** * @title Liquidity Book Constants Library * @author Trader Joe * @notice Set of constants for Liquidity Book contracts */ library Constants { uint8 internal constant SCALE_OFFSET = 128; uint256 internal constant SCALE = 1 << SCALE_OFFSET; uint256 internal constant PRECISION = 1e18; uint256 internal constant SQUARED_PRECISION = PRECISION * PRECISION; uint256 internal constant MAX_FEE = 0.1e18; // 10% uint256 internal constant MAX_PROTOCOL_SHARE = 2_500; // 25% of the fee uint256 internal constant BASIS_POINT_MAX = 10_000; // (2^256 - 1) / (2 * log(2**128) / log(1.0001)) uint256 internal constant MAX_LIQUIDITY_PER_BIN = 65251743116719673010965625540244653191619923014385985379600384103134737; /// @dev The expected return after a successful flash loan bytes32 internal constant CALLBACK_SUCCESS = keccak256("LBPair.onFlashLoan"); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {Constants} from "./Constants.sol"; /** * @title Liquidity Book Fee Helper Library * @author Trader Joe * @notice This library contains functions to calculate fees */ library FeeHelper { error FeeHelper__FeeTooLarge(); error FeeHelper__ProtocolShareTooLarge(); /** * @dev Modifier to check that the fee is not too large * @param fee The fee */ modifier verifyFee(uint128 fee) { if (fee > Constants.MAX_FEE) revert FeeHelper__FeeTooLarge(); _; } /** * @dev Modifier to check that the protocol share is not too large * @param protocolShare The protocol share */ modifier verifyProtocolShare(uint128 protocolShare) { if (protocolShare > Constants.MAX_PROTOCOL_SHARE) revert FeeHelper__ProtocolShareTooLarge(); _; } /** * @dev Calculates the fee amount from the amount with fees, rounding up * @param amountWithFees The amount with fees * @param totalFee The total fee * @return feeAmount The fee amount */ function getFeeAmountFrom(uint128 amountWithFees, uint128 totalFee) internal pure verifyFee(totalFee) returns (uint128) { unchecked { // Can't overflow, max(result) = (type(uint128).max * 0.1e18 + 1e18 - 1) / 1e18 < 2^128 return uint128((uint256(amountWithFees) * totalFee + Constants.PRECISION - 1) / Constants.PRECISION); } } /** * @dev Calculates the fee amount that will be charged, rounding up * @param amount The amount * @param totalFee The total fee * @return feeAmount The fee amount */ function getFeeAmount(uint128 amount, uint128 totalFee) internal pure verifyFee(totalFee) returns (uint128) { unchecked { uint256 denominator = Constants.PRECISION - totalFee; // Can't overflow, max(result) = (type(uint128).max * 0.1e18 + (1e18 - 1)) / 0.9e18 < 2^128 return uint128((uint256(amount) * totalFee + denominator - 1) / denominator); } } /** * @dev Calculates the composition fee amount from the amount with fees, rounding down * @param amountWithFees The amount with fees * @param totalFee The total fee * @return The amount with fees */ function getCompositionFee(uint128 amountWithFees, uint128 totalFee) internal pure verifyFee(totalFee) returns (uint128) { unchecked { uint256 denominator = Constants.SQUARED_PRECISION; // Can't overflow, max(result) = type(uint128).max * 0.1e18 * 1.1e18 / 1e36 <= 2^128 * 0.11e36 / 1e36 < 2^128 return uint128(uint256(amountWithFees) * totalFee * (uint256(totalFee) + Constants.PRECISION) / denominator); } } /** * @dev Calculates the protocol fee amount from the fee amount and the protocol share, rounding down * @param feeAmount The fee amount * @param protocolShare The protocol share * @return protocolFeeAmount The protocol fee amount */ function getProtocolFeeAmount(uint128 feeAmount, uint128 protocolShare) internal pure verifyProtocolShare(protocolShare) returns (uint128) { unchecked { return uint128(uint256(feeAmount) * protocolShare / Constants.BASIS_POINT_MAX); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {PackedUint128Math} from "./PackedUint128Math.sol"; import {Encoded} from "./Encoded.sol"; /** * @title Liquidity Book Liquidity Configurations Library * @author Trader Joe * @notice This library contains functions to encode and decode the config of a pool and interact with the encoded bytes32. */ library LiquidityConfigurations { using PackedUint128Math for bytes32; using PackedUint128Math for uint128; using Encoded for bytes32; error LiquidityConfigurations__InvalidConfig(); uint256 private constant OFFSET_ID = 0; uint256 private constant OFFSET_DISTRIBUTION_Y = 24; uint256 private constant OFFSET_DISTRIBUTION_X = 88; uint256 private constant PRECISION = 1e18; /** * @dev Encode the distributionX, distributionY and id into a single bytes32 * @param distributionX The distribution of the first token * @param distributionY The distribution of the second token * @param id The id of the pool * @return config The encoded config as follows: * [0 - 24[: id * [24 - 88[: distributionY * [88 - 152[: distributionX * [152 - 256[: empty */ function encodeParams(uint64 distributionX, uint64 distributionY, uint24 id) internal pure returns (bytes32 config) { config = config.set(distributionX, Encoded.MASK_UINT64, OFFSET_DISTRIBUTION_X); config = config.set(distributionY, Encoded.MASK_UINT64, OFFSET_DISTRIBUTION_Y); config = config.set(id, Encoded.MASK_UINT24, OFFSET_ID); } /** * @dev Decode the distributionX, distributionY and id from a single bytes32 * @param config The encoded config as follows: * [0 - 24[: id * [24 - 88[: distributionY * [88 - 152[: distributionX * [152 - 256[: empty * @return distributionX The distribution of the first token * @return distributionY The distribution of the second token * @return id The id of the bin to add the liquidity to */ function decodeParams(bytes32 config) internal pure returns (uint64 distributionX, uint64 distributionY, uint24 id) { distributionX = config.decodeUint64(OFFSET_DISTRIBUTION_X); distributionY = config.decodeUint64(OFFSET_DISTRIBUTION_Y); id = config.decodeUint24(OFFSET_ID); if (uint256(config) > type(uint152).max || distributionX > PRECISION || distributionY > PRECISION) { revert LiquidityConfigurations__InvalidConfig(); } } /** * @dev Get the amounts and id from a config and amountsIn * @param config The encoded config as follows: * [0 - 24[: id * [24 - 88[: distributionY * [88 - 152[: distributionX * [152 - 256[: empty * @param amountsIn The amounts to distribute as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @return amounts The distributed amounts as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @return id The id of the bin to add the liquidity to */ function getAmountsAndId(bytes32 config, bytes32 amountsIn) internal pure returns (bytes32, uint24) { (uint64 distributionX, uint64 distributionY, uint24 id) = decodeParams(config); (uint128 x1, uint128 x2) = amountsIn.decode(); assembly { x1 := div(mul(x1, distributionX), PRECISION) x2 := div(mul(x2, distributionY), PRECISION) } return (x1.encode(x2), id); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol) pragma solidity ^0.8.20; import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; /** * @dev This contract is a fork of the `ReentrancyGuardUpgradeable` contract from OpenZeppelin * that has been modified to update the `_nonReentrantBefore` and `_nonReentrantAfter` * functions to `internal` visibility. * * Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuardUpgradeable is Initializable { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant NOT_ENTERED = 1; uint256 private constant ENTERED = 2; /// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard struct ReentrancyGuardStorage { uint256 _status; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00; function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) { assembly { $.slot := ReentrancyGuardStorageLocation } } /** * @dev Unauthorized reentrant call. */ error ReentrancyGuardReentrantCall(); function __ReentrancyGuard_init() internal onlyInitializing { __ReentrancyGuard_init_unchained(); } function __ReentrancyGuard_init_unchained() internal onlyInitializing { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); $._status = NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() internal { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); // On the first call to nonReentrant, _status will be NOT_ENTERED if ($._status == ENTERED) { revert ReentrancyGuardReentrantCall(); } // Any calls to nonReentrant after this point will fail $._status = ENTERED; } function _nonReentrantAfter() internal { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) $._status = NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); return $._status == ENTERED; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {ILBHooks} from "./ILBHooks.sol"; import {ILBPair} from "./ILBPair.sol"; /** * @title Liquidity Book Factory Interface * @author Trader Joe * @notice Required interface of LBFactory contract */ interface ILBFactory { error LBFactory__IdenticalAddresses(IERC20 token); error LBFactory__QuoteAssetNotWhitelisted(IERC20 quoteAsset); error LBFactory__QuoteAssetAlreadyWhitelisted(IERC20 quoteAsset); error LBFactory__AddressZero(); error LBFactory__LBPairAlreadyExists(IERC20 tokenX, IERC20 tokenY, uint256 _binStep); error LBFactory__LBPairDoesNotExist(IERC20 tokenX, IERC20 tokenY, uint256 binStep); error LBFactory__LBPairNotCreated(IERC20 tokenX, IERC20 tokenY, uint256 binStep); error LBFactory__FlashLoanFeeAboveMax(uint256 fees, uint256 maxFees); error LBFactory__BinStepTooLow(uint256 binStep); error LBFactory__PresetIsLockedForUsers(address user, uint256 binStep); error LBFactory__LBPairIgnoredIsAlreadyInTheSameState(); error LBFactory__BinStepHasNoPreset(uint256 binStep); error LBFactory__PresetOpenStateIsAlreadyInTheSameState(); error LBFactory__SameFeeRecipient(address feeRecipient); error LBFactory__SameFlashLoanFee(uint256 flashLoanFee); error LBFactory__LBPairSafetyCheckFailed(address LBPairImplementation); error LBFactory__SameImplementation(address LBPairImplementation); error LBFactory__ImplementationNotSet(); error LBFactory__SameHooksImplementation(address hooksImplementation); error LBFactory__SameHooksParameters(bytes32 hooksParameters); error LBFactory__InvalidHooksParameters(); error LBFactory__CannotGrantDefaultAdminRole(); /** * @dev Structure to store the LBPair information, such as: * binStep: The bin step of the LBPair * LBPair: The address of the LBPair * createdByOwner: Whether the pair was created by the owner of the factory * ignoredForRouting: Whether the pair is ignored for routing or not. An ignored pair will not be explored during routes finding */ struct LBPairInformation { uint16 binStep; ILBPair LBPair; bool createdByOwner; bool ignoredForRouting; } event LBPairCreated( IERC20 indexed tokenX, IERC20 indexed tokenY, uint256 indexed binStep, ILBPair LBPair, uint256 pid ); event FeeRecipientSet(address oldRecipient, address newRecipient); event FlashLoanFeeSet(uint256 oldFlashLoanFee, uint256 newFlashLoanFee); event LBPairImplementationSet(address oldLBPairImplementation, address LBPairImplementation); event LBPairIgnoredStateChanged(ILBPair indexed LBPair, bool ignored); event PresetSet( uint256 indexed binStep, uint256 baseFactor, uint256 filterPeriod, uint256 decayPeriod, uint256 reductionFactor, uint256 variableFeeControl, uint256 protocolShare, uint256 maxVolatilityAccumulator ); event PresetOpenStateChanged(uint256 indexed binStep, bool indexed isOpen); event PresetRemoved(uint256 indexed binStep); event QuoteAssetAdded(IERC20 indexed quoteAsset); event QuoteAssetRemoved(IERC20 indexed quoteAsset); function getMinBinStep() external pure returns (uint256); function getFeeRecipient() external view returns (address); function getMaxFlashLoanFee() external pure returns (uint256); function getFlashLoanFee() external view returns (uint256); function getLBPairImplementation() external view returns (address); function getNumberOfLBPairs() external view returns (uint256); function getLBPairAtIndex(uint256 id) external returns (ILBPair); function getNumberOfQuoteAssets() external view returns (uint256); function getQuoteAssetAtIndex(uint256 index) external view returns (IERC20); function isQuoteAsset(IERC20 token) external view returns (bool); function getLBPairInformation(IERC20 tokenX, IERC20 tokenY, uint256 binStep) external view returns (LBPairInformation memory); function getPreset(uint256 binStep) external view returns ( uint256 baseFactor, uint256 filterPeriod, uint256 decayPeriod, uint256 reductionFactor, uint256 variableFeeControl, uint256 protocolShare, uint256 maxAccumulator, bool isOpen ); function getAllBinSteps() external view returns (uint256[] memory presetsBinStep); function getOpenBinSteps() external view returns (uint256[] memory openBinStep); function getAllLBPairs(IERC20 tokenX, IERC20 tokenY) external view returns (LBPairInformation[] memory LBPairsBinStep); function setLBPairImplementation(address lbPairImplementation) external; function createLBPair(IERC20 tokenX, IERC20 tokenY, uint24 activeId, uint16 binStep) external returns (ILBPair pair); function setLBPairIgnored(IERC20 tokenX, IERC20 tokenY, uint16 binStep, bool ignored) external; function setPreset( uint16 binStep, uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator, bool isOpen ) external; function setPresetOpenState(uint16 binStep, bool isOpen) external; function removePreset(uint16 binStep) external; function setFeesParametersOnPair( IERC20 tokenX, IERC20 tokenY, uint16 binStep, uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator ) external; function setLBHooksParametersOnPair( IERC20 tokenX, IERC20 tokenY, uint16 binStep, bytes32 hooksParameters, bytes memory onHooksSetData ) external; function removeLBHooksOnPair(IERC20 tokenX, IERC20 tokenY, uint16 binStep) external; function setFeeRecipient(address feeRecipient) external; function setFlashLoanFee(uint256 flashLoanFee) external; function addQuoteAsset(IERC20 quoteAsset) external; function removeQuoteAsset(IERC20 quoteAsset) external; function forceDecay(ILBPair lbPair) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; /// @title Liquidity Book Flashloan Callback Interface /// @author Trader Joe /// @notice Required interface to interact with LB flash loans interface ILBFlashLoanCallback { function LBFlashLoanCallback( address sender, IERC20 tokenX, IERC20 tokenY, bytes32 amounts, bytes32 totalFees, bytes calldata data ) external returns (bytes32); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {Hooks} from "../libraries/Hooks.sol"; import {ILBFactory} from "./ILBFactory.sol"; import {ILBFlashLoanCallback} from "./ILBFlashLoanCallback.sol"; import {ILBToken} from "./ILBToken.sol"; interface ILBPair is ILBToken { error LBPair__ZeroBorrowAmount(); error LBPair__AddressZero(); error LBPair__EmptyMarketConfigs(); error LBPair__FlashLoanCallbackFailed(); error LBPair__FlashLoanInsufficientAmount(); error LBPair__InsufficientAmountIn(); error LBPair__InsufficientAmountOut(); error LBPair__InvalidInput(); error LBPair__InvalidStaticFeeParameters(); error LBPair__OnlyFactory(); error LBPair__OnlyProtocolFeeRecipient(); error LBPair__OutOfLiquidity(); error LBPair__TokenNotSupported(); error LBPair__ZeroAmount(uint24 id); error LBPair__ZeroAmountsOut(uint24 id); error LBPair__ZeroShares(uint24 id); error LBPair__MaxTotalFeeExceeded(); error LBPair__InvalidHooks(); struct MintArrays { uint256[] ids; bytes32[] amounts; uint256[] liquidityMinted; } event DepositedToBins(address indexed sender, address indexed to, uint256[] ids, bytes32[] amounts); event WithdrawnFromBins(address indexed sender, address indexed to, uint256[] ids, bytes32[] amounts); event CompositionFees(address indexed sender, uint24 id, bytes32 totalFees, bytes32 protocolFees); event CollectedProtocolFees(address indexed feeRecipient, bytes32 protocolFees); event Swap( address indexed sender, address indexed to, uint24 id, bytes32 amountsIn, bytes32 amountsOut, uint24 volatilityAccumulator, bytes32 totalFees, bytes32 protocolFees ); event StaticFeeParametersSet( address indexed sender, uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator ); event HooksParametersSet(address indexed sender, bytes32 hooksParameters); event FlashLoan( address indexed sender, ILBFlashLoanCallback indexed receiver, uint24 activeId, bytes32 amounts, bytes32 totalFees, bytes32 protocolFees ); event OracleLengthIncreased(address indexed sender, uint16 oracleLength); event ForcedDecay(address indexed sender, uint24 idReference, uint24 volatilityReference); function initialize( uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator, uint24 activeId ) external; function implementation() external view returns (address); function getFactory() external view returns (ILBFactory factory); function getTokenX() external view returns (IERC20 tokenX); function getTokenY() external view returns (IERC20 tokenY); function getBinStep() external view returns (uint16 binStep); function getReserves() external view returns (uint128 reserveX, uint128 reserveY); function getActiveId() external view returns (uint24 activeId); function getBin(uint24 id) external view returns (uint128 binReserveX, uint128 binReserveY); function getNextNonEmptyBin(bool swapForY, uint24 id) external view returns (uint24 nextId); function getProtocolFees() external view returns (uint128 protocolFeeX, uint128 protocolFeeY); function getStaticFeeParameters() external view returns ( uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator ); function getLBHooksParameters() external view returns (bytes32 hooksParameters); function getVariableFeeParameters() external view returns (uint24 volatilityAccumulator, uint24 volatilityReference, uint24 idReference, uint40 timeOfLastUpdate); function getOracleParameters() external view returns (uint8 sampleLifetime, uint16 size, uint16 activeSize, uint40 lastUpdated, uint40 firstTimestamp); function getOracleSampleAt(uint40 lookupTimestamp) external view returns (uint64 cumulativeId, uint64 cumulativeVolatility, uint64 cumulativeBinCrossed); function getPriceFromId(uint24 id) external view returns (uint256 price); function getIdFromPrice(uint256 price) external view returns (uint24 id); function getSwapIn(uint128 amountOut, bool swapForY) external view returns (uint128 amountIn, uint128 amountOutLeft, uint128 fee); function getSwapOut(uint128 amountIn, bool swapForY) external view returns (uint128 amountInLeft, uint128 amountOut, uint128 fee); function swap(bool swapForY, address to) external returns (bytes32 amountsOut); function flashLoan(ILBFlashLoanCallback receiver, bytes32 amounts, bytes calldata data) external; function mint(address to, bytes32[] calldata liquidityConfigs, address refundTo) external returns (bytes32 amountsReceived, bytes32 amountsLeft, uint256[] memory liquidityMinted); function burn(address from, address to, uint256[] calldata ids, uint256[] calldata amountsToBurn) external returns (bytes32[] memory amounts); function collectProtocolFees() external returns (bytes32 collectedProtocolFees); function increaseOracleLength(uint16 newLength) external; function setStaticFeeParameters( uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator ) external; function setHooksParameters(bytes32 hooksParameters, bytes calldata onHooksSetData) external; function forceDecay() external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import {ILBToken} from "./interfaces/ILBToken.sol"; /** * @title Liquidity Book Token * @author Trader Joe * @notice The LBToken is an implementation of a multi-token. * It allows to create multi-ERC20 represented by their ids. * Its implementation is really similar to the ERC1155 standard the main difference * is that it doesn't do any call to the receiver contract to prevent reentrancy. * As it's only for ERC20s, the uri function is not implemented. * The contract is made for batch operations. */ abstract contract LBToken is ILBToken { /** * @dev The mapping from account to token id to account balance. */ mapping(address => mapping(uint256 => uint256)) private _balances; /** * @dev The mapping from token id to total supply. */ mapping(uint256 => uint256) private _totalSupplies; /** * @dev Mapping from account to spender approvals. */ mapping(address => mapping(address => bool)) private _spenderApprovals; /** * @dev Modifier to check if the spender is approved for all. */ modifier checkApproval(address from, address spender) { if (!_isApprovedForAll(from, spender)) revert LBToken__SpenderNotApproved(from, spender); _; } /** * @dev Modifier to check if the address is not zero or the contract itself. */ modifier notAddressZeroOrThis(address account) { if (account == address(0) || account == address(this)) revert LBToken__AddressThisOrZero(); _; } /** * @dev Modifier to check if the length of the arrays are equal. */ modifier checkLength(uint256 lengthA, uint256 lengthB) { if (lengthA != lengthB) revert LBToken__InvalidLength(); _; } /** * @notice Returns the name of the token. * @return The name of the token. */ function name() public view virtual override returns (string memory) { return "Liquidity Book Token"; } /** * @notice Returns the symbol of the token, usually a shorter version of the name. * @return The symbol of the token. */ function symbol() public view virtual override returns (string memory) { return "LBT"; } /** * @notice Returns the total supply of token of type `id`. * /** * @dev This is the amount of token of type `id` minted minus the amount burned. * @param id The token id. * @return The total supply of that token id. */ function totalSupply(uint256 id) public view virtual override returns (uint256) { return _totalSupplies[id]; } /** * @notice Returns the amount of tokens of type `id` owned by `account`. * @param account The address of the owner. * @param id The token id. * @return The amount of tokens of type `id` owned by `account`. */ function balanceOf(address account, uint256 id) public view virtual override returns (uint256) { return _balances[account][id]; } /** * @notice Return the balance of multiple (account/id) pairs. * @param accounts The addresses of the owners. * @param ids The token ids. * @return batchBalances The balance for each (account, id) pair. */ function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) public view virtual override checkLength(accounts.length, ids.length) returns (uint256[] memory batchBalances) { batchBalances = new uint256[](accounts.length); unchecked { for (uint256 i; i < accounts.length; ++i) { batchBalances[i] = balanceOf(accounts[i], ids[i]); } } } /** * @notice Returns true if `spender` is approved to transfer `owner`'s tokens or if `spender` is the `owner`. * @param owner The address of the owner. * @param spender The address of the spender. * @return True if `spender` is approved to transfer `owner`'s tokens. */ function isApprovedForAll(address owner, address spender) public view virtual override returns (bool) { return _isApprovedForAll(owner, spender); } /** * @notice Grants or revokes permission to `spender` to transfer the caller's lbTokens, according to `approved`. * @param spender The address of the spender. * @param approved The boolean value to grant or revoke permission. */ function approveForAll(address spender, bool approved) public virtual override { _approveForAll(msg.sender, spender, approved); } /** * @notice Batch transfers `amounts` of `ids` from `from` to `to`. * @param from The address of the owner. * @param to The address of the recipient. * @param ids The list of token ids. * @param amounts The list of amounts to transfer for each token id in `ids`. */ function batchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts) public virtual override checkApproval(from, msg.sender) { _batchTransferFrom(from, to, ids, amounts); } /** * @notice Returns true if `spender` is approved to transfer `owner`'s tokens or if `spender` is the `owner`. * @param owner The address of the owner. * @param spender The address of the spender. * @return True if `spender` is approved to transfer `owner`'s tokens. */ function _isApprovedForAll(address owner, address spender) internal view returns (bool) { return owner == spender || _spenderApprovals[owner][spender]; } /** * @dev Mint `amount` of `id` to `account`. * The `account` must not be the zero address. * The event should be emitted by the contract that inherits this contract. * @param account The address of the owner. * @param id The token id. * @param amount The amount to mint. */ function _mint(address account, uint256 id, uint256 amount) internal { _totalSupplies[id] += amount; unchecked { _balances[account][id] += amount; } } /** * @dev Burn `amount` of `id` from `account`. * The `account` must not be the zero address. * The event should be emitted by the contract that inherits this contract. * @param account The address of the owner. * @param id The token id. * @param amount The amount to burn. */ function _burn(address account, uint256 id, uint256 amount) internal { mapping(uint256 => uint256) storage accountBalances = _balances[account]; uint256 balance = accountBalances[id]; if (balance < amount) revert LBToken__BurnExceedsBalance(account, id, amount); unchecked { _totalSupplies[id] -= amount; accountBalances[id] = balance - amount; } } /** * @dev Batch transfers `amounts` of `ids` from `from` to `to`. * The `to` must not be the zero address and the `ids` and `amounts` must have the same length. * @param from The address of the owner. * @param to The address of the recipient. * @param ids The list of token ids. * @param amounts The list of amounts to transfer for each token id in `ids`. */ function _batchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts) internal checkLength(ids.length, amounts.length) notAddressZeroOrThis(to) { mapping(uint256 => uint256) storage fromBalances = _balances[from]; mapping(uint256 => uint256) storage toBalances = _balances[to]; for (uint256 i; i < ids.length;) { uint256 id = ids[i]; uint256 amount = amounts[i]; uint256 fromBalance = fromBalances[id]; if (fromBalance < amount) revert LBToken__TransferExceedsBalance(from, id, amount); unchecked { fromBalances[id] = fromBalance - amount; toBalances[id] += amount; ++i; } } emit TransferBatch(msg.sender, from, to, ids, amounts); } /** * @notice Grants or revokes permission to `spender` to transfer the caller's tokens, according to `approved` * @param owner The address of the owner * @param spender The address of the spender * @param approved The boolean value to grant or revoke permission */ function _approveForAll(address owner, address spender, bool approved) internal notAddressZeroOrThis(owner) { if (owner == spender) revert LBToken__SelfApproval(owner); _spenderApprovals[owner][spender] = approved; emit ApprovalForAll(owner, spender, approved); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {SampleMath} from "./math/SampleMath.sol"; import {SafeCast} from "./math/SafeCast.sol"; import {PairParameterHelper} from "./PairParameterHelper.sol"; /** * @title Liquidity Book Oracle Helper Library * @author Trader Joe * @notice This library contains functions to manage the oracle * The oracle samples are stored in a single bytes32 array. * Each sample is encoded as follows: * 0 - 16: oracle length (16 bits) * 16 - 80: cumulative id (64 bits) * 80 - 144: cumulative volatility accumulator (64 bits) * 144 - 208: cumulative bin crossed (64 bits) * 208 - 216: sample lifetime (8 bits) * 216 - 256: sample creation timestamp (40 bits) */ library OracleHelper { using SampleMath for bytes32; using SafeCast for uint256; using PairParameterHelper for bytes32; error OracleHelper__InvalidOracleId(); error OracleHelper__NewLengthTooSmall(); error OracleHelper__LookUpTimestampTooOld(); struct Oracle { bytes32[65535] samples; } uint256 internal constant _MAX_SAMPLE_LIFETIME = 120 seconds; /** * @dev Modifier to check that the oracle id is valid * @param oracleId The oracle id */ modifier checkOracleId(uint16 oracleId) { if (oracleId == 0) revert OracleHelper__InvalidOracleId(); _; } /** * @dev Returns the sample at the given oracleId * @param oracle The oracle * @param oracleId The oracle id * @return sample The sample */ function getSample(Oracle storage oracle, uint16 oracleId) internal view checkOracleId(oracleId) returns (bytes32 sample) { unchecked { sample = oracle.samples[oracleId - 1]; } } /** * @dev Returns the active sample and the active size of the oracle * @param oracle The oracle * @param oracleId The oracle id * @return activeSample The active sample * @return activeSize The active size of the oracle */ function getActiveSampleAndSize(Oracle storage oracle, uint16 oracleId) internal view returns (bytes32 activeSample, uint16 activeSize) { activeSample = getSample(oracle, oracleId); activeSize = activeSample.getOracleLength(); if (oracleId != activeSize) { activeSize = getSample(oracle, activeSize).getOracleLength(); activeSize = oracleId > activeSize ? oracleId : activeSize; } } /** * @dev Returns the sample at the given timestamp. If the timestamp is not in the oracle, it returns the closest sample * @param oracle The oracle * @param oracleId The oracle id * @param lookUpTimestamp The timestamp to look up * @return lastUpdate The last update timestamp * @return cumulativeId The cumulative id * @return cumulativeVolatility The cumulative volatility * @return cumulativeBinCrossed The cumulative bin crossed */ function getSampleAt(Oracle storage oracle, uint16 oracleId, uint40 lookUpTimestamp) internal view returns (uint40 lastUpdate, uint64 cumulativeId, uint64 cumulativeVolatility, uint64 cumulativeBinCrossed) { (bytes32 activeSample, uint16 activeSize) = getActiveSampleAndSize(oracle, oracleId); if (oracle.samples[oracleId % activeSize].getSampleLastUpdate() > lookUpTimestamp) { revert OracleHelper__LookUpTimestampTooOld(); } lastUpdate = activeSample.getSampleLastUpdate(); if (lastUpdate <= lookUpTimestamp) { return ( lastUpdate, activeSample.getCumulativeId(), activeSample.getCumulativeVolatility(), activeSample.getCumulativeBinCrossed() ); } else { lastUpdate = lookUpTimestamp; } (bytes32 prevSample, bytes32 nextSample) = binarySearch(oracle, oracleId, lookUpTimestamp, activeSize); uint40 weightPrev = nextSample.getSampleLastUpdate() - lookUpTimestamp; uint40 weightNext = lookUpTimestamp - prevSample.getSampleLastUpdate(); (cumulativeId, cumulativeVolatility, cumulativeBinCrossed) = prevSample.getWeightedAverage(nextSample, weightPrev, weightNext); } /** * @dev Binary search to find the 2 samples surrounding the given timestamp * @param oracle The oracle * @param oracleId The oracle id * @param lookUpTimestamp The timestamp to look up * @param length The oracle length * @return prevSample The previous sample * @return nextSample The next sample */ function binarySearch(Oracle storage oracle, uint16 oracleId, uint40 lookUpTimestamp, uint16 length) internal view returns (bytes32, bytes32) { uint256 low = 0; uint256 high = length - 1; bytes32 sample; uint40 sampleLastUpdate; uint256 startId = oracleId; // oracleId is 1-based while (low <= high) { uint256 mid = (low + high) >> 1; assembly { oracleId := addmod(startId, mid, length) } sample = oracle.samples[oracleId]; sampleLastUpdate = sample.getSampleLastUpdate(); if (sampleLastUpdate > lookUpTimestamp) { high = mid - 1; } else if (sampleLastUpdate < lookUpTimestamp) { low = mid + 1; } else { return (sample, sample); } } if (lookUpTimestamp < sampleLastUpdate) { unchecked { if (oracleId == 0) { oracleId = length; } return (oracle.samples[oracleId - 1], sample); } } else { assembly { oracleId := addmod(oracleId, 1, length) } return (sample, oracle.samples[oracleId]); } } /** * @dev Sets the sample at the given oracleId * @param oracle The oracle * @param oracleId The oracle id * @param sample The sample */ function setSample(Oracle storage oracle, uint16 oracleId, bytes32 sample) internal checkOracleId(oracleId) { unchecked { oracle.samples[oracleId - 1] = sample; } } /** * @dev Updates the oracle * @param oracle The oracle * @param parameters The parameters * @param activeId The active id * @return The updated parameters */ function update(Oracle storage oracle, bytes32 parameters, uint24 activeId) internal returns (bytes32) { uint16 oracleId = parameters.getOracleId(); if (oracleId == 0) return parameters; bytes32 sample = getSample(oracle, oracleId); uint40 createdAt = sample.getSampleCreation(); uint40 lastUpdatedAt = createdAt + sample.getSampleLifetime(); if (block.timestamp.safe40() > lastUpdatedAt) { unchecked { (uint64 cumulativeId, uint64 cumulativeVolatility, uint64 cumulativeBinCrossed) = sample.update( uint40(block.timestamp - lastUpdatedAt), parameters.getActiveId(), parameters.getVolatilityAccumulator(), parameters.getDeltaId(activeId) ); uint16 length = sample.getOracleLength(); uint256 lifetime = block.timestamp - createdAt; if (lifetime > _MAX_SAMPLE_LIFETIME) { assembly { oracleId := add(mod(oracleId, length), 1) } lifetime = 0; createdAt = uint40(block.timestamp); parameters = parameters.setOracleId(oracleId); } sample = SampleMath.encode( length, cumulativeId, cumulativeVolatility, cumulativeBinCrossed, uint8(lifetime), createdAt ); } setSample(oracle, oracleId, sample); } return parameters; } /** * @dev Increases the oracle length * @param oracle The oracle * @param oracleId The oracle id * @param newLength The new length */ function increaseLength(Oracle storage oracle, uint16 oracleId, uint16 newLength) internal { bytes32 sample = getSample(oracle, oracleId); uint16 length = sample.getOracleLength(); if (length >= newLength) revert OracleHelper__NewLengthTooSmall(); bytes32 lastSample = length == oracleId ? sample : length == 0 ? bytes32(0) : getSample(oracle, length); uint256 activeSize = lastSample.getOracleLength(); activeSize = oracleId > activeSize ? oracleId : activeSize; for (uint256 i = length; i < newLength;) { oracle.samples[i] = bytes32(uint256(activeSize)); unchecked { ++i; } } setSample(oracle, oracleId, (sample ^ bytes32(uint256(length))) | bytes32(uint256(newLength))); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {Constants} from "../Constants.sol"; /** * @title Liquidity Book Packed Uint128 Math Library * @author Trader Joe * @notice This library contains functions to encode and decode two uint128 into a single bytes32 * and interact with the encoded bytes32. */ library PackedUint128Math { error PackedUint128Math__AddOverflow(); error PackedUint128Math__SubUnderflow(); error PackedUint128Math__MultiplierTooLarge(); uint256 private constant OFFSET = 128; uint256 private constant MASK_128 = 0xffffffffffffffffffffffffffffffff; uint256 private constant MASK_128_PLUS_ONE = MASK_128 + 1; /** * @dev Encodes two uint128 into a single bytes32 * @param x1 The first uint128 * @param x2 The second uint128 * @return z The encoded bytes32 as follows: * [0 - 128[: x1 * [128 - 256[: x2 */ function encode(uint128 x1, uint128 x2) internal pure returns (bytes32 z) { assembly { z := or(and(x1, MASK_128), shl(OFFSET, x2)) } } /** * @dev Encodes a uint128 into a single bytes32 as the first uint128 * @param x1 The uint128 * @return z The encoded bytes32 as follows: * [0 - 128[: x1 * [128 - 256[: empty */ function encodeFirst(uint128 x1) internal pure returns (bytes32 z) { assembly { z := and(x1, MASK_128) } } /** * @dev Encodes a uint128 into a single bytes32 as the second uint128 * @param x2 The uint128 * @return z The encoded bytes32 as follows: * [0 - 128[: empty * [128 - 256[: x2 */ function encodeSecond(uint128 x2) internal pure returns (bytes32 z) { assembly { z := shl(OFFSET, x2) } } /** * @dev Encodes a uint128 into a single bytes32 as the first or second uint128 * @param x The uint128 * @param first Whether to encode as the first or second uint128 * @return z The encoded bytes32 as follows: * if first: * [0 - 128[: x * [128 - 256[: empty * else: * [0 - 128[: empty * [128 - 256[: x */ function encode(uint128 x, bool first) internal pure returns (bytes32 z) { return first ? encodeFirst(x) : encodeSecond(x); } /** * @dev Decodes a bytes32 into two uint128 * @param z The encoded bytes32 as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @return x1 The first uint128 * @return x2 The second uint128 */ function decode(bytes32 z) internal pure returns (uint128 x1, uint128 x2) { assembly { x1 := and(z, MASK_128) x2 := shr(OFFSET, z) } } /** * @dev Decodes a bytes32 into a uint128 as the first uint128 * @param z The encoded bytes32 as follows: * [0 - 128[: x * [128 - 256[: any * @return x The first uint128 */ function decodeX(bytes32 z) internal pure returns (uint128 x) { assembly { x := and(z, MASK_128) } } /** * @dev Decodes a bytes32 into a uint128 as the second uint128 * @param z The encoded bytes32 as follows: * [0 - 128[: any * [128 - 256[: y * @return y The second uint128 */ function decodeY(bytes32 z) internal pure returns (uint128 y) { assembly { y := shr(OFFSET, z) } } /** * @dev Decodes a bytes32 into a uint128 as the first or second uint128 * @param z The encoded bytes32 as follows: * if first: * [0 - 128[: x1 * [128 - 256[: empty * else: * [0 - 128[: empty * [128 - 256[: x2 * @param first Whether to decode as the first or second uint128 * @return x The decoded uint128 */ function decode(bytes32 z, bool first) internal pure returns (uint128 x) { return first ? decodeX(z) : decodeY(z); } /** * @dev Adds two encoded bytes32, reverting on overflow on any of the uint128 * @param x The first bytes32 encoded as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @param y The second bytes32 encoded as follows: * [0 - 128[: y1 * [128 - 256[: y2 * @return z The sum of x and y encoded as follows: * [0 - 128[: x1 + y1 * [128 - 256[: x2 + y2 */ function add(bytes32 x, bytes32 y) internal pure returns (bytes32 z) { assembly { z := add(x, y) } if (z < x || uint128(uint256(z)) < uint128(uint256(x))) { revert PackedUint128Math__AddOverflow(); } } /** * @dev Adds an encoded bytes32 and two uint128, reverting on overflow on any of the uint128 * @param x The bytes32 encoded as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @param y1 The first uint128 * @param y2 The second uint128 * @return z The sum of x and y encoded as follows: * [0 - 128[: x1 + y1 * [128 - 256[: x2 + y2 */ function add(bytes32 x, uint128 y1, uint128 y2) internal pure returns (bytes32) { return add(x, encode(y1, y2)); } /** * @dev Subtracts two encoded bytes32, reverting on underflow on any of the uint128 * @param x The first bytes32 encoded as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @param y The second bytes32 encoded as follows: * [0 - 128[: y1 * [128 - 256[: y2 * @return z The difference of x and y encoded as follows: * [0 - 128[: x1 - y1 * [128 - 256[: x2 - y2 */ function sub(bytes32 x, bytes32 y) internal pure returns (bytes32 z) { assembly { z := sub(x, y) } if (z > x || uint128(uint256(z)) > uint128(uint256(x))) { revert PackedUint128Math__SubUnderflow(); } } /** * @dev Subtracts an encoded bytes32 and two uint128, reverting on underflow on any of the uint128 * @param x The bytes32 encoded as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @param y1 The first uint128 * @param y2 The second uint128 * @return z The difference of x and y encoded as follows: * [0 - 128[: x1 - y1 * [128 - 256[: x2 - y2 */ function sub(bytes32 x, uint128 y1, uint128 y2) internal pure returns (bytes32) { return sub(x, encode(y1, y2)); } /** * @dev Returns whether any of the uint128 of x is strictly greater than the corresponding uint128 of y * @param x The first bytes32 encoded as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @param y The second bytes32 encoded as follows: * [0 - 128[: y1 * [128 - 256[: y2 * @return x1 < y1 || x2 < y2 */ function lt(bytes32 x, bytes32 y) internal pure returns (bool) { (uint128 x1, uint128 x2) = decode(x); (uint128 y1, uint128 y2) = decode(y); return x1 < y1 || x2 < y2; } /** * @dev Returns whether any of the uint128 of x is strictly greater than the corresponding uint128 of y * @param x The first bytes32 encoded as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @param y The second bytes32 encoded as follows: * [0 - 128[: y1 * [128 - 256[: y2 * @return x1 < y1 || x2 < y2 */ function gt(bytes32 x, bytes32 y) internal pure returns (bool) { (uint128 x1, uint128 x2) = decode(x); (uint128 y1, uint128 y2) = decode(y); return x1 > y1 || x2 > y2; } /** * @dev Multiplies an encoded bytes32 by a uint128 then divides the result by 10_000, rounding down * The result can't overflow as the multiplier needs to be smaller or equal to 10_000 * @param x The bytes32 encoded as follows: * [0 - 128[: x1 * [128 - 256[: x2 * @param multiplier The uint128 to multiply by (must be smaller or equal to 10_000) * @return z The product of x and multiplier encoded as follows: * [0 - 128[: floor((x1 * multiplier) / 10_000) * [128 - 256[: floor((x2 * multiplier) / 10_000) */ function scalarMulDivBasisPointRoundDown(bytes32 x, uint128 multiplier) internal pure returns (bytes32 z) { if (multiplier == 0) return 0; uint256 BASIS_POINT_MAX = Constants.BASIS_POINT_MAX; if (multiplier > BASIS_POINT_MAX) revert PackedUint128Math__MultiplierTooLarge(); (uint128 x1, uint128 x2) = decode(x); assembly { x1 := div(mul(x1, multiplier), BASIS_POINT_MAX) x2 := div(mul(x2, multiplier), BASIS_POINT_MAX) } return encode(x1, x2); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {Constants} from "./Constants.sol"; import {SafeCast} from "./math/SafeCast.sol"; import {Encoded} from "./math/Encoded.sol"; /** * @title Liquidity Book Pair Parameter Helper Library * @author Trader Joe * @dev This library contains functions to get and set parameters of a pair * The parameters are stored in a single bytes32 variable in the following format: * [0 - 16[: base factor (16 bits) * [16 - 28[: filter period (12 bits) * [28 - 40[: decay period (12 bits) * [40 - 54[: reduction factor (14 bits) * [54 - 78[: variable fee control (24 bits) * [78 - 92[: protocol share (14 bits) * [92 - 112[: max volatility accumulator (20 bits) * [112 - 132[: volatility accumulator (20 bits) * [132 - 152[: volatility reference (20 bits) * [152 - 176[: index reference (24 bits) * [176 - 216[: time of last update (40 bits) * [216 - 232[: oracle index (16 bits) * [232 - 256[: active index (24 bits) */ library PairParameterHelper { using SafeCast for uint256; using Encoded for bytes32; error PairParametersHelper__InvalidParameter(); uint256 internal constant OFFSET_BASE_FACTOR = 0; uint256 internal constant OFFSET_FILTER_PERIOD = 16; uint256 internal constant OFFSET_DECAY_PERIOD = 28; uint256 internal constant OFFSET_REDUCTION_FACTOR = 40; uint256 internal constant OFFSET_VAR_FEE_CONTROL = 54; uint256 internal constant OFFSET_PROTOCOL_SHARE = 78; uint256 internal constant OFFSET_MAX_VOL_ACC = 92; uint256 internal constant OFFSET_VOL_ACC = 112; uint256 internal constant OFFSET_VOL_REF = 132; uint256 internal constant OFFSET_ID_REF = 152; uint256 internal constant OFFSET_TIME_LAST_UPDATE = 176; uint256 internal constant OFFSET_ORACLE_ID = 216; uint256 internal constant OFFSET_ACTIVE_ID = 232; uint256 internal constant MASK_STATIC_PARAMETER = 0xffffffffffffffffffffffffffff; /** * @dev Get the base factor from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 16[: base factor (16 bits) * [16 - 256[: other parameters * @return baseFactor The base factor */ function getBaseFactor(bytes32 params) internal pure returns (uint16 baseFactor) { baseFactor = params.decodeUint16(OFFSET_BASE_FACTOR); } /** * @dev Get the filter period from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 16[: other parameters * [16 - 28[: filter period (12 bits) * [28 - 256[: other parameters * @return filterPeriod The filter period */ function getFilterPeriod(bytes32 params) internal pure returns (uint16 filterPeriod) { filterPeriod = params.decodeUint12(OFFSET_FILTER_PERIOD); } /** * @dev Get the decay period from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 28[: other parameters * [28 - 40[: decay period (12 bits) * [40 - 256[: other parameters * @return decayPeriod The decay period */ function getDecayPeriod(bytes32 params) internal pure returns (uint16 decayPeriod) { decayPeriod = params.decodeUint12(OFFSET_DECAY_PERIOD); } /** * @dev Get the reduction factor from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 40[: other parameters * [40 - 54[: reduction factor (14 bits) * [54 - 256[: other parameters * @return reductionFactor The reduction factor */ function getReductionFactor(bytes32 params) internal pure returns (uint16 reductionFactor) { reductionFactor = params.decodeUint14(OFFSET_REDUCTION_FACTOR); } /** * @dev Get the variable fee control from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 54[: other parameters * [54 - 78[: variable fee control (24 bits) * [78 - 256[: other parameters * @return variableFeeControl The variable fee control */ function getVariableFeeControl(bytes32 params) internal pure returns (uint24 variableFeeControl) { variableFeeControl = params.decodeUint24(OFFSET_VAR_FEE_CONTROL); } /** * @dev Get the protocol share from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 78[: other parameters * [78 - 92[: protocol share (14 bits) * [92 - 256[: other parameters * @return protocolShare The protocol share */ function getProtocolShare(bytes32 params) internal pure returns (uint16 protocolShare) { protocolShare = params.decodeUint14(OFFSET_PROTOCOL_SHARE); } /** * @dev Get the max volatility accumulator from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 92[: other parameters * [92 - 112[: max volatility accumulator (20 bits) * [112 - 256[: other parameters * @return maxVolatilityAccumulator The max volatility accumulator */ function getMaxVolatilityAccumulator(bytes32 params) internal pure returns (uint24 maxVolatilityAccumulator) { maxVolatilityAccumulator = params.decodeUint20(OFFSET_MAX_VOL_ACC); } /** * @dev Get the volatility accumulator from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 112[: other parameters * [112 - 132[: volatility accumulator (20 bits) * [132 - 256[: other parameters * @return volatilityAccumulator The volatility accumulator */ function getVolatilityAccumulator(bytes32 params) internal pure returns (uint24 volatilityAccumulator) { volatilityAccumulator = params.decodeUint20(OFFSET_VOL_ACC); } /** * @dev Get the volatility reference from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 132[: other parameters * [132 - 152[: volatility reference (20 bits) * [152 - 256[: other parameters * @return volatilityReference The volatility reference */ function getVolatilityReference(bytes32 params) internal pure returns (uint24 volatilityReference) { volatilityReference = params.decodeUint20(OFFSET_VOL_REF); } /** * @dev Get the index reference from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 152[: other parameters * [152 - 176[: index reference (24 bits) * [176 - 256[: other parameters * @return idReference The index reference */ function getIdReference(bytes32 params) internal pure returns (uint24 idReference) { idReference = params.decodeUint24(OFFSET_ID_REF); } /** * @dev Get the time of last update from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 176[: other parameters * [176 - 216[: time of last update (40 bits) * [216 - 256[: other parameters * @return timeOflastUpdate The time of last update */ function getTimeOfLastUpdate(bytes32 params) internal pure returns (uint40 timeOflastUpdate) { timeOflastUpdate = params.decodeUint40(OFFSET_TIME_LAST_UPDATE); } /** * @dev Get the oracle id from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 216[: other parameters * [216 - 232[: oracle id (16 bits) * [232 - 256[: other parameters * @return oracleId The oracle id */ function getOracleId(bytes32 params) internal pure returns (uint16 oracleId) { oracleId = params.decodeUint16(OFFSET_ORACLE_ID); } /** * @dev Get the active index from the encoded pair parameters * @param params The encoded pair parameters, as follows: * [0 - 232[: other parameters * [232 - 256[: active index (24 bits) * @return activeId The active index */ function getActiveId(bytes32 params) internal pure returns (uint24 activeId) { activeId = params.decodeUint24(OFFSET_ACTIVE_ID); } /** * @dev Get the delta between the current active index and the cached active index * @param params The encoded pair parameters, as follows: * [0 - 232[: other parameters * [232 - 256[: active index (24 bits) * @param activeId The current active index * @return The delta */ function getDeltaId(bytes32 params, uint24 activeId) internal pure returns (uint24) { uint24 id = getActiveId(params); unchecked { return activeId > id ? activeId - id : id - activeId; } } /** * @dev Calculates the base fee, with 18 decimals * @param params The encoded pair parameters * @param binStep The bin step (in basis points) * @return baseFee The base fee */ function getBaseFee(bytes32 params, uint16 binStep) internal pure returns (uint256) { unchecked { // Base factor is in basis points, binStep is in basis points, so we multiply by 1e10 return uint256(getBaseFactor(params)) * binStep * 1e10; } } /** * @dev Calculates the variable fee * @param params The encoded pair parameters * @param binStep The bin step (in basis points) * @return variableFee The variable fee */ function getVariableFee(bytes32 params, uint16 binStep) internal pure returns (uint256 variableFee) { uint256 variableFeeControl = getVariableFeeControl(params); if (variableFeeControl != 0) { unchecked { // The volatility accumulator is in basis points, binStep is in basis points, // and the variable fee control is in basis points, so the result is in 100e18th uint256 prod = uint256(getVolatilityAccumulator(params)) * binStep; variableFee = (prod * prod * variableFeeControl + 99) / 100; } } } /** * @dev Calculates the total fee, which is the sum of the base fee and the variable fee * @param params The encoded pair parameters * @param binStep The bin step (in basis points) * @return totalFee The total fee */ function getTotalFee(bytes32 params, uint16 binStep) internal pure returns (uint128) { unchecked { return (getBaseFee(params, binStep) + getVariableFee(params, binStep)).safe128(); } } /** * @dev Set the oracle id in the encoded pair parameters * @param params The encoded pair parameters * @param oracleId The oracle id * @return The updated encoded pair parameters */ function setOracleId(bytes32 params, uint16 oracleId) internal pure returns (bytes32) { return params.set(oracleId, Encoded.MASK_UINT16, OFFSET_ORACLE_ID); } /** * @dev Set the volatility reference in the encoded pair parameters * @param params The encoded pair parameters * @param volRef The volatility reference * @return The updated encoded pair parameters */ function setVolatilityReference(bytes32 params, uint24 volRef) internal pure returns (bytes32) { if (volRef > Encoded.MASK_UINT20) revert PairParametersHelper__InvalidParameter(); return params.set(volRef, Encoded.MASK_UINT20, OFFSET_VOL_REF); } /** * @dev Set the volatility accumulator in the encoded pair parameters * @param params The encoded pair parameters * @param volAcc The volatility accumulator * @return The updated encoded pair parameters */ function setVolatilityAccumulator(bytes32 params, uint24 volAcc) internal pure returns (bytes32) { if (volAcc > Encoded.MASK_UINT20) revert PairParametersHelper__InvalidParameter(); return params.set(volAcc, Encoded.MASK_UINT20, OFFSET_VOL_ACC); } /** * @dev Set the active id in the encoded pair parameters * @param params The encoded pair parameters * @param activeId The active id * @return newParams The updated encoded pair parameters */ function setActiveId(bytes32 params, uint24 activeId) internal pure returns (bytes32 newParams) { return params.set(activeId, Encoded.MASK_UINT24, OFFSET_ACTIVE_ID); } /** * @dev Sets the static fee parameters in the encoded pair parameters * @param params The encoded pair parameters * @param baseFactor The base factor * @param filterPeriod The filter period * @param decayPeriod The decay period * @param reductionFactor The reduction factor * @param variableFeeControl The variable fee control * @param protocolShare The protocol share * @param maxVolatilityAccumulator The max volatility accumulator * @return newParams The updated encoded pair parameters */ function setStaticFeeParameters( bytes32 params, uint16 baseFactor, uint16 filterPeriod, uint16 decayPeriod, uint16 reductionFactor, uint24 variableFeeControl, uint16 protocolShare, uint24 maxVolatilityAccumulator ) internal pure returns (bytes32 newParams) { if ( filterPeriod > decayPeriod || decayPeriod > Encoded.MASK_UINT12 || reductionFactor > Constants.BASIS_POINT_MAX || protocolShare > Constants.MAX_PROTOCOL_SHARE || maxVolatilityAccumulator > Encoded.MASK_UINT20 ) revert PairParametersHelper__InvalidParameter(); newParams = newParams.set(baseFactor, Encoded.MASK_UINT16, OFFSET_BASE_FACTOR); newParams = newParams.set(filterPeriod, Encoded.MASK_UINT12, OFFSET_FILTER_PERIOD); newParams = newParams.set(decayPeriod, Encoded.MASK_UINT12, OFFSET_DECAY_PERIOD); newParams = newParams.set(reductionFactor, Encoded.MASK_UINT14, OFFSET_REDUCTION_FACTOR); newParams = newParams.set(variableFeeControl, Encoded.MASK_UINT24, OFFSET_VAR_FEE_CONTROL); newParams = newParams.set(protocolShare, Encoded.MASK_UINT14, OFFSET_PROTOCOL_SHARE); newParams = newParams.set(maxVolatilityAccumulator, Encoded.MASK_UINT20, OFFSET_MAX_VOL_ACC); return params.set(uint256(newParams), MASK_STATIC_PARAMETER, 0); } /** * @dev Updates the index reference in the encoded pair parameters * @param params The encoded pair parameters * @return newParams The updated encoded pair parameters */ function updateIdReference(bytes32 params) internal pure returns (bytes32 newParams) { uint24 activeId = getActiveId(params); return params.set(activeId, Encoded.MASK_UINT24, OFFSET_ID_REF); } /** * @dev Updates the time of last update in the encoded pair parameters * @param params The encoded pair parameters * @param timestamp The timestamp * @return newParams The updated encoded pair parameters */ function updateTimeOfLastUpdate(bytes32 params, uint256 timestamp) internal pure returns (bytes32 newParams) { uint40 currentTime = timestamp.safe40(); return params.set(currentTime, Encoded.MASK_UINT40, OFFSET_TIME_LAST_UPDATE); } /** * @dev Updates the volatility reference in the encoded pair parameters * @param params The encoded pair parameters * @return The updated encoded pair parameters */ function updateVolatilityReference(bytes32 params) internal pure returns (bytes32) { uint256 volAcc = getVolatilityAccumulator(params); uint256 reductionFactor = getReductionFactor(params); uint24 volRef; unchecked { volRef = uint24(volAcc * reductionFactor / Constants.BASIS_POINT_MAX); } return setVolatilityReference(params, volRef); } /** * @dev Updates the volatility accumulator in the encoded pair parameters * @param params The encoded pair parameters * @param activeId The active id * @return The updated encoded pair parameters */ function updateVolatilityAccumulator(bytes32 params, uint24 activeId) internal pure returns (bytes32) { uint256 idReference = getIdReference(params); uint256 deltaId; uint256 volAcc; unchecked { deltaId = activeId > idReference ? activeId - idReference : idReference - activeId; volAcc = (uint256(getVolatilityReference(params)) + deltaId * Constants.BASIS_POINT_MAX); } uint256 maxVolAcc = getMaxVolatilityAccumulator(params); volAcc = volAcc > maxVolAcc ? maxVolAcc : volAcc; return setVolatilityAccumulator(params, uint24(volAcc)); } /** * @dev Updates the volatility reference and the volatility accumulator in the encoded pair parameters * @param params The encoded pair parameters * @param timestamp The timestamp * @return The updated encoded pair parameters */ function updateReferences(bytes32 params, uint256 timestamp) internal pure returns (bytes32) { uint256 dt = timestamp - getTimeOfLastUpdate(params); if (dt >= getFilterPeriod(params)) { params = updateIdReference(params); params = dt < getDecayPeriod(params) ? updateVolatilityReference(params) : setVolatilityReference(params, 0); } return updateTimeOfLastUpdate(params, timestamp); } /** * @dev Updates the volatility reference and the volatility accumulator in the encoded pair parameters * @param params The encoded pair parameters * @param activeId The active id * @param timestamp The timestamp * @return The updated encoded pair parameters */ function updateVolatilityParameters(bytes32 params, uint24 activeId, uint256 timestamp) internal pure returns (bytes32) { params = updateReferences(params, timestamp); return updateVolatilityAccumulator(params, activeId); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {Uint128x128Math} from "./math/Uint128x128Math.sol"; import {Uint256x256Math} from "./math/Uint256x256Math.sol"; import {SafeCast} from "./math/SafeCast.sol"; import {Constants} from "./Constants.sol"; /** * @title Liquidity Book Price Helper Library * @author Trader Joe * @notice This library contains functions to calculate prices */ library PriceHelper { using Uint128x128Math for uint256; using Uint256x256Math for uint256; using SafeCast for uint256; int256 private constant REAL_ID_SHIFT = 1 << 23; /** * @dev Calculates the price from the id and the bin step * @param id The id * @param binStep The bin step * @return price The price as a 128.128-binary fixed-point number */ function getPriceFromId(uint24 id, uint16 binStep) internal pure returns (uint256 price) { uint256 base = getBase(binStep); int256 exponent = getExponent(id); price = base.pow(exponent); } /** * @dev Calculates the id from the price and the bin step * @param price The price as a 128.128-binary fixed-point number * @param binStep The bin step * @return id The id */ function getIdFromPrice(uint256 price, uint16 binStep) internal pure returns (uint24 id) { uint256 base = getBase(binStep); int256 realId = price.log2() / base.log2(); unchecked { id = uint256(REAL_ID_SHIFT + realId).safe24(); } } /** * @dev Calculates the base from the bin step, which is `1 + binStep / BASIS_POINT_MAX` * @param binStep The bin step * @return base The base */ function getBase(uint16 binStep) internal pure returns (uint256) { unchecked { return Constants.SCALE + (uint256(binStep) << Constants.SCALE_OFFSET) / Constants.BASIS_POINT_MAX; } } /** * @dev Calculates the exponent from the id, which is `id - REAL_ID_SHIFT` * @param id The id * @return exponent The exponent */ function getExponent(uint24 id) internal pure returns (int256) { unchecked { return int256(uint256(id)) - REAL_ID_SHIFT; } } /** * @dev Converts a price with 18 decimals to a 128.128-binary fixed-point number * @param price The price with 18 decimals * @return price128x128 The 128.128-binary fixed-point number */ function convertDecimalPriceTo128x128(uint256 price) internal pure returns (uint256) { return price.shiftDivRoundDown(Constants.SCALE_OFFSET, Constants.PRECISION); } /** * @dev Converts a 128.128-binary fixed-point number to a price with 18 decimals * @param price128x128 The 128.128-binary fixed-point number * @return price The price with 18 decimals */ function convert128x128PriceToDecimal(uint256 price128x128) internal pure returns (uint256) { return price128x128.mulShiftRoundDown(Constants.PRECISION, Constants.SCALE_OFFSET); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; /** * @title Liquidity Book Safe Cast Library * @author Trader Joe * @notice This library contains functions to safely cast uint256 to different uint types. */ library SafeCast { error SafeCast__Exceeds248Bits(); error SafeCast__Exceeds240Bits(); error SafeCast__Exceeds232Bits(); error SafeCast__Exceeds224Bits(); error SafeCast__Exceeds216Bits(); error SafeCast__Exceeds208Bits(); error SafeCast__Exceeds200Bits(); error SafeCast__Exceeds192Bits(); error SafeCast__Exceeds184Bits(); error SafeCast__Exceeds176Bits(); error SafeCast__Exceeds168Bits(); error SafeCast__Exceeds160Bits(); error SafeCast__Exceeds152Bits(); error SafeCast__Exceeds144Bits(); error SafeCast__Exceeds136Bits(); error SafeCast__Exceeds128Bits(); error SafeCast__Exceeds120Bits(); error SafeCast__Exceeds112Bits(); error SafeCast__Exceeds104Bits(); error SafeCast__Exceeds96Bits(); error SafeCast__Exceeds88Bits(); error SafeCast__Exceeds80Bits(); error SafeCast__Exceeds72Bits(); error SafeCast__Exceeds64Bits(); error SafeCast__Exceeds56Bits(); error SafeCast__Exceeds48Bits(); error SafeCast__Exceeds40Bits(); error SafeCast__Exceeds32Bits(); error SafeCast__Exceeds24Bits(); error SafeCast__Exceeds16Bits(); error SafeCast__Exceeds8Bits(); /** * @dev Returns x on uint248 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint248 */ function safe248(uint256 x) internal pure returns (uint248 y) { if ((y = uint248(x)) != x) revert SafeCast__Exceeds248Bits(); } /** * @dev Returns x on uint240 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint240 */ function safe240(uint256 x) internal pure returns (uint240 y) { if ((y = uint240(x)) != x) revert SafeCast__Exceeds240Bits(); } /** * @dev Returns x on uint232 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint232 */ function safe232(uint256 x) internal pure returns (uint232 y) { if ((y = uint232(x)) != x) revert SafeCast__Exceeds232Bits(); } /** * @dev Returns x on uint224 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint224 */ function safe224(uint256 x) internal pure returns (uint224 y) { if ((y = uint224(x)) != x) revert SafeCast__Exceeds224Bits(); } /** * @dev Returns x on uint216 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint216 */ function safe216(uint256 x) internal pure returns (uint216 y) { if ((y = uint216(x)) != x) revert SafeCast__Exceeds216Bits(); } /** * @dev Returns x on uint208 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint208 */ function safe208(uint256 x) internal pure returns (uint208 y) { if ((y = uint208(x)) != x) revert SafeCast__Exceeds208Bits(); } /** * @dev Returns x on uint200 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint200 */ function safe200(uint256 x) internal pure returns (uint200 y) { if ((y = uint200(x)) != x) revert SafeCast__Exceeds200Bits(); } /** * @dev Returns x on uint192 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint192 */ function safe192(uint256 x) internal pure returns (uint192 y) { if ((y = uint192(x)) != x) revert SafeCast__Exceeds192Bits(); } /** * @dev Returns x on uint184 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint184 */ function safe184(uint256 x) internal pure returns (uint184 y) { if ((y = uint184(x)) != x) revert SafeCast__Exceeds184Bits(); } /** * @dev Returns x on uint176 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint176 */ function safe176(uint256 x) internal pure returns (uint176 y) { if ((y = uint176(x)) != x) revert SafeCast__Exceeds176Bits(); } /** * @dev Returns x on uint168 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint168 */ function safe168(uint256 x) internal pure returns (uint168 y) { if ((y = uint168(x)) != x) revert SafeCast__Exceeds168Bits(); } /** * @dev Returns x on uint160 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint160 */ function safe160(uint256 x) internal pure returns (uint160 y) { if ((y = uint160(x)) != x) revert SafeCast__Exceeds160Bits(); } /** * @dev Returns x on uint152 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint152 */ function safe152(uint256 x) internal pure returns (uint152 y) { if ((y = uint152(x)) != x) revert SafeCast__Exceeds152Bits(); } /** * @dev Returns x on uint144 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint144 */ function safe144(uint256 x) internal pure returns (uint144 y) { if ((y = uint144(x)) != x) revert SafeCast__Exceeds144Bits(); } /** * @dev Returns x on uint136 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint136 */ function safe136(uint256 x) internal pure returns (uint136 y) { if ((y = uint136(x)) != x) revert SafeCast__Exceeds136Bits(); } /** * @dev Returns x on uint128 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint128 */ function safe128(uint256 x) internal pure returns (uint128 y) { if ((y = uint128(x)) != x) revert SafeCast__Exceeds128Bits(); } /** * @dev Returns x on uint120 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint120 */ function safe120(uint256 x) internal pure returns (uint120 y) { if ((y = uint120(x)) != x) revert SafeCast__Exceeds120Bits(); } /** * @dev Returns x on uint112 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint112 */ function safe112(uint256 x) internal pure returns (uint112 y) { if ((y = uint112(x)) != x) revert SafeCast__Exceeds112Bits(); } /** * @dev Returns x on uint104 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint104 */ function safe104(uint256 x) internal pure returns (uint104 y) { if ((y = uint104(x)) != x) revert SafeCast__Exceeds104Bits(); } /** * @dev Returns x on uint96 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint96 */ function safe96(uint256 x) internal pure returns (uint96 y) { if ((y = uint96(x)) != x) revert SafeCast__Exceeds96Bits(); } /** * @dev Returns x on uint88 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint88 */ function safe88(uint256 x) internal pure returns (uint88 y) { if ((y = uint88(x)) != x) revert SafeCast__Exceeds88Bits(); } /** * @dev Returns x on uint80 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint80 */ function safe80(uint256 x) internal pure returns (uint80 y) { if ((y = uint80(x)) != x) revert SafeCast__Exceeds80Bits(); } /** * @dev Returns x on uint72 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint72 */ function safe72(uint256 x) internal pure returns (uint72 y) { if ((y = uint72(x)) != x) revert SafeCast__Exceeds72Bits(); } /** * @dev Returns x on uint64 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint64 */ function safe64(uint256 x) internal pure returns (uint64 y) { if ((y = uint64(x)) != x) revert SafeCast__Exceeds64Bits(); } /** * @dev Returns x on uint56 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint56 */ function safe56(uint256 x) internal pure returns (uint56 y) { if ((y = uint56(x)) != x) revert SafeCast__Exceeds56Bits(); } /** * @dev Returns x on uint48 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint48 */ function safe48(uint256 x) internal pure returns (uint48 y) { if ((y = uint48(x)) != x) revert SafeCast__Exceeds48Bits(); } /** * @dev Returns x on uint40 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint40 */ function safe40(uint256 x) internal pure returns (uint40 y) { if ((y = uint40(x)) != x) revert SafeCast__Exceeds40Bits(); } /** * @dev Returns x on uint32 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint32 */ function safe32(uint256 x) internal pure returns (uint32 y) { if ((y = uint32(x)) != x) revert SafeCast__Exceeds32Bits(); } /** * @dev Returns x on uint24 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint24 */ function safe24(uint256 x) internal pure returns (uint24 y) { if ((y = uint24(x)) != x) revert SafeCast__Exceeds24Bits(); } /** * @dev Returns x on uint16 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint16 */ function safe16(uint256 x) internal pure returns (uint16 y) { if ((y = uint16(x)) != x) revert SafeCast__Exceeds16Bits(); } /** * @dev Returns x on uint8 and check that it does not overflow * @param x The value as an uint256 * @return y The value as an uint8 */ function safe8(uint256 x) internal pure returns (uint8 y) { if ((y = uint8(x)) != x) revert SafeCast__Exceeds8Bits(); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {Encoded} from "./Encoded.sol"; /** * @title Liquidity Book Sample Math Library * @author Trader Joe * @notice This library contains functions to encode and decode a sample into a single bytes32 * and interact with the encoded bytes32 * The sample is encoded as follows: * 0 - 16: oracle length (16 bits) * 16 - 80: cumulative id (64 bits) * 80 - 144: cumulative volatility accumulator (64 bits) * 144 - 208: cumulative bin crossed (64 bits) * 208 - 216: sample lifetime (8 bits) * 216 - 256: sample creation timestamp (40 bits) */ library SampleMath { using Encoded for bytes32; uint256 internal constant OFFSET_ORACLE_LENGTH = 0; uint256 internal constant OFFSET_CUMULATIVE_ID = 16; uint256 internal constant OFFSET_CUMULATIVE_VOLATILITY = 80; uint256 internal constant OFFSET_CUMULATIVE_BIN_CROSSED = 144; uint256 internal constant OFFSET_SAMPLE_LIFETIME = 208; uint256 internal constant OFFSET_SAMPLE_CREATION = 216; /** * @dev Encodes a sample * @param oracleLength The oracle length * @param cumulativeId The cumulative id * @param cumulativeVolatility The cumulative volatility * @param cumulativeBinCrossed The cumulative bin crossed * @param sampleLifetime The sample lifetime * @param createdAt The sample creation timestamp * @return sample The encoded sample */ function encode( uint16 oracleLength, uint64 cumulativeId, uint64 cumulativeVolatility, uint64 cumulativeBinCrossed, uint8 sampleLifetime, uint40 createdAt ) internal pure returns (bytes32 sample) { sample = sample.set(oracleLength, Encoded.MASK_UINT16, OFFSET_ORACLE_LENGTH); sample = sample.set(cumulativeId, Encoded.MASK_UINT64, OFFSET_CUMULATIVE_ID); sample = sample.set(cumulativeVolatility, Encoded.MASK_UINT64, OFFSET_CUMULATIVE_VOLATILITY); sample = sample.set(cumulativeBinCrossed, Encoded.MASK_UINT64, OFFSET_CUMULATIVE_BIN_CROSSED); sample = sample.set(sampleLifetime, Encoded.MASK_UINT8, OFFSET_SAMPLE_LIFETIME); sample = sample.set(createdAt, Encoded.MASK_UINT40, OFFSET_SAMPLE_CREATION); } /** * @dev Gets the oracle length from an encoded sample * @param sample The encoded sample as follows: * [0 - 16[: oracle length (16 bits) * [16 - 256[: any (240 bits) * @return length The oracle length */ function getOracleLength(bytes32 sample) internal pure returns (uint16 length) { return sample.decodeUint16(0); } /** * @dev Gets the cumulative id from an encoded sample * @param sample The encoded sample as follows: * [0 - 16[: any (16 bits) * [16 - 80[: cumulative id (64 bits) * [80 - 256[: any (176 bits) * @return id The cumulative id */ function getCumulativeId(bytes32 sample) internal pure returns (uint64 id) { return sample.decodeUint64(OFFSET_CUMULATIVE_ID); } /** * @dev Gets the cumulative volatility accumulator from an encoded sample * @param sample The encoded sample as follows: * [0 - 80[: any (80 bits) * [80 - 144[: cumulative volatility accumulator (64 bits) * [144 - 256[: any (112 bits) * @return volatilityAccumulator The cumulative volatility */ function getCumulativeVolatility(bytes32 sample) internal pure returns (uint64 volatilityAccumulator) { return sample.decodeUint64(OFFSET_CUMULATIVE_VOLATILITY); } /** * @dev Gets the cumulative bin crossed from an encoded sample * @param sample The encoded sample as follows: * [0 - 144[: any (144 bits) * [144 - 208[: cumulative bin crossed (64 bits) * [208 - 256[: any (48 bits) * @return binCrossed The cumulative bin crossed */ function getCumulativeBinCrossed(bytes32 sample) internal pure returns (uint64 binCrossed) { return sample.decodeUint64(OFFSET_CUMULATIVE_BIN_CROSSED); } /** * @dev Gets the sample lifetime from an encoded sample * @param sample The encoded sample as follows: * [0 - 208[: any (208 bits) * [208 - 216[: sample lifetime (8 bits) * [216 - 256[: any (40 bits) * @return lifetime The sample lifetime */ function getSampleLifetime(bytes32 sample) internal pure returns (uint8 lifetime) { return sample.decodeUint8(OFFSET_SAMPLE_LIFETIME); } /** * @dev Gets the sample creation timestamp from an encoded sample * @param sample The encoded sample as follows: * [0 - 216[: any (216 bits) * [216 - 256[: sample creation timestamp (40 bits) * @return creation The sample creation timestamp */ function getSampleCreation(bytes32 sample) internal pure returns (uint40 creation) { return sample.decodeUint40(OFFSET_SAMPLE_CREATION); } /** * @dev Gets the sample last update timestamp from an encoded sample * @param sample The encoded sample as follows: * [0 - 216[: any (216 bits) * [216 - 256[: sample creation timestamp (40 bits) * @return lastUpdate The sample last update timestamp */ function getSampleLastUpdate(bytes32 sample) internal pure returns (uint40 lastUpdate) { lastUpdate = getSampleCreation(sample) + getSampleLifetime(sample); } /** * @dev Gets the weighted average of two samples and their respective weights * @param sample1 The first encoded sample * @param sample2 The second encoded sample * @param weight1 The weight of the first sample * @param weight2 The weight of the second sample * @return weightedAverageId The weighted average id * @return weightedAverageVolatility The weighted average volatility * @return weightedAverageBinCrossed The weighted average bin crossed */ function getWeightedAverage(bytes32 sample1, bytes32 sample2, uint40 weight1, uint40 weight2) internal pure returns (uint64 weightedAverageId, uint64 weightedAverageVolatility, uint64 weightedAverageBinCrossed) { uint256 cId1 = getCumulativeId(sample1); uint256 cVolatility1 = getCumulativeVolatility(sample1); uint256 cBinCrossed1 = getCumulativeBinCrossed(sample1); if (weight2 == 0) return (uint64(cId1), uint64(cVolatility1), uint64(cBinCrossed1)); uint256 cId2 = getCumulativeId(sample2); uint256 cVolatility2 = getCumulativeVolatility(sample2); uint256 cBinCrossed2 = getCumulativeBinCrossed(sample2); if (weight1 == 0) return (uint64(cId2), uint64(cVolatility2), uint64(cBinCrossed2)); uint256 totalWeight = uint256(weight1) + weight2; unchecked { weightedAverageId = uint64((cId1 * weight1 + cId2 * weight2) / totalWeight); weightedAverageVolatility = uint64((cVolatility1 * weight1 + cVolatility2 * weight2) / totalWeight); weightedAverageBinCrossed = uint64((cBinCrossed1 * weight1 + cBinCrossed2 * weight2) / totalWeight); } } /** * @dev Updates a sample with the given values * @param sample The encoded sample * @param deltaTime The time elapsed since the last update * @param activeId The active id * @param volatilityAccumulator The volatility accumulator * @param binCrossed The bin crossed * @return cumulativeId The cumulative id * @return cumulativeVolatility The cumulative volatility * @return cumulativeBinCrossed The cumulative bin crossed */ function update(bytes32 sample, uint40 deltaTime, uint24 activeId, uint24 volatilityAccumulator, uint24 binCrossed) internal pure returns (uint64 cumulativeId, uint64 cumulativeVolatility, uint64 cumulativeBinCrossed) { unchecked { cumulativeId = uint64(activeId) * deltaTime; cumulativeVolatility = uint64(volatilityAccumulator) * deltaTime; cumulativeBinCrossed = uint64(binCrossed) * deltaTime; } cumulativeId += getCumulativeId(sample); cumulativeVolatility += getCumulativeVolatility(sample); cumulativeBinCrossed += getCumulativeBinCrossed(sample); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {BitMath} from "./BitMath.sol"; /** * @title Liquidity Book Tree Math Library * @author Trader Joe * @notice This library contains functions to interact with a tree of TreeUint24. */ library TreeMath { using BitMath for uint256; struct TreeUint24 { bytes32 level0; mapping(bytes32 => bytes32) level1; mapping(bytes32 => bytes32) level2; } /** * @dev Returns true if the tree contains the id * @param tree The tree * @param id The id * @return True if the tree contains the id */ function contains(TreeUint24 storage tree, uint24 id) internal view returns (bool) { bytes32 leaf2 = bytes32(uint256(id) >> 8); return tree.level2[leaf2] & bytes32(1 << (id & type(uint8).max)) != 0; } /** * @dev Adds the id to the tree and returns true if the id was not already in the tree * It will also propagate the change to the parent levels. * @param tree The tree * @param id The id * @return True if the id was not already in the tree */ function add(TreeUint24 storage tree, uint24 id) internal returns (bool) { bytes32 key2 = bytes32(uint256(id) >> 8); bytes32 leaves = tree.level2[key2]; bytes32 newLeaves = leaves | bytes32(1 << (id & type(uint8).max)); if (leaves != newLeaves) { tree.level2[key2] = newLeaves; if (leaves == 0) { bytes32 key1 = key2 >> 8; leaves = tree.level1[key1]; tree.level1[key1] = leaves | bytes32(1 << (uint256(key2) & type(uint8).max)); if (leaves == 0) tree.level0 |= bytes32(1 << (uint256(key1) & type(uint8).max)); } return true; } return false; } /** * @dev Removes the id from the tree and returns true if the id was in the tree. * It will also propagate the change to the parent levels. * @param tree The tree * @param id The id * @return True if the id was in the tree */ function remove(TreeUint24 storage tree, uint24 id) internal returns (bool) { bytes32 key2 = bytes32(uint256(id) >> 8); bytes32 leaves = tree.level2[key2]; bytes32 newLeaves = leaves & ~bytes32(1 << (id & type(uint8).max)); if (leaves != newLeaves) { tree.level2[key2] = newLeaves; if (newLeaves == 0) { bytes32 key1 = key2 >> 8; newLeaves = tree.level1[key1] & ~bytes32(1 << (uint256(key2) & type(uint8).max)); tree.level1[key1] = newLeaves; if (newLeaves == 0) tree.level0 &= ~bytes32(1 << (uint256(key1) & type(uint8).max)); } return true; } return false; } /** * @dev Returns the first id in the tree that is lower than or equal to the given id. * It will return type(uint24).max if there is no such id. * @param tree The tree * @param id The id * @return The first id in the tree that is lower than or equal to the given id */ function findFirstRight(TreeUint24 storage tree, uint24 id) internal view returns (uint24) { bytes32 leaves; bytes32 key2 = bytes32(uint256(id) >> 8); uint8 bit = uint8(id & type(uint8).max); if (bit != 0) { leaves = tree.level2[key2]; uint256 closestBit = _closestBitRight(leaves, bit); if (closestBit != type(uint256).max) return uint24(uint256(key2) << 8 | closestBit); } bytes32 key1 = key2 >> 8; bit = uint8(uint256(key2) & type(uint8).max); if (bit != 0) { leaves = tree.level1[key1]; uint256 closestBit = _closestBitRight(leaves, bit); if (closestBit != type(uint256).max) { key2 = bytes32(uint256(key1) << 8 | closestBit); leaves = tree.level2[key2]; return uint24(uint256(key2) << 8 | uint256(leaves).mostSignificantBit()); } } bit = uint8(uint256(key1) & type(uint8).max); if (bit != 0) { leaves = tree.level0; uint256 closestBit = _closestBitRight(leaves, bit); if (closestBit != type(uint256).max) { key1 = bytes32(closestBit); leaves = tree.level1[key1]; key2 = bytes32(uint256(key1) << 8 | uint256(leaves).mostSignificantBit()); leaves = tree.level2[key2]; return uint24(uint256(key2) << 8 | uint256(leaves).mostSignificantBit()); } } return type(uint24).max; } /** * @dev Returns the first id in the tree that is higher than or equal to the given id. * It will return 0 if there is no such id. * @param tree The tree * @param id The id * @return The first id in the tree that is higher than or equal to the given id */ function findFirstLeft(TreeUint24 storage tree, uint24 id) internal view returns (uint24) { bytes32 leaves; bytes32 key2 = bytes32(uint256(id) >> 8); uint8 bit = uint8(id & type(uint8).max); if (bit != type(uint8).max) { leaves = tree.level2[key2]; uint256 closestBit = _closestBitLeft(leaves, bit); if (closestBit != type(uint256).max) return uint24(uint256(key2) << 8 | closestBit); } bytes32 key1 = key2 >> 8; bit = uint8(uint256(key2) & type(uint8).max); if (bit != type(uint8).max) { leaves = tree.level1[key1]; uint256 closestBit = _closestBitLeft(leaves, bit); if (closestBit != type(uint256).max) { key2 = bytes32(uint256(key1) << 8 | closestBit); leaves = tree.level2[key2]; return uint24(uint256(key2) << 8 | uint256(leaves).leastSignificantBit()); } } bit = uint8(uint256(key1) & type(uint8).max); if (bit != type(uint8).max) { leaves = tree.level0; uint256 closestBit = _closestBitLeft(leaves, bit); if (closestBit != type(uint256).max) { key1 = bytes32(closestBit); leaves = tree.level1[key1]; key2 = bytes32(uint256(key1) << 8 | uint256(leaves).leastSignificantBit()); leaves = tree.level2[key2]; return uint24(uint256(key2) << 8 | uint256(leaves).leastSignificantBit()); } } return 0; } /** * @dev Returns the first bit in the given leaves that is strictly lower than the given bit. * It will return type(uint256).max if there is no such bit. * @param leaves The leaves * @param bit The bit * @return The first bit in the given leaves that is strictly lower than the given bit */ function _closestBitRight(bytes32 leaves, uint8 bit) private pure returns (uint256) { unchecked { return uint256(leaves).closestBitRight(bit - 1); } } /** * @dev Returns the first bit in the given leaves that is strictly higher than the given bit. * It will return type(uint256).max if there is no such bit. * @param leaves The leaves * @param bit The bit * @return The first bit in the given leaves that is strictly higher than the given bit */ function _closestBitLeft(bytes32 leaves, uint8 bit) private pure returns (uint256) { unchecked { return uint256(leaves).closestBitLeft(bit + 1); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {BitMath} from "./BitMath.sol"; /** * @title Liquidity Book Uint256x256 Math Library * @author Trader Joe * @notice Helper contract used for full precision calculations */ library Uint256x256Math { error Uint256x256Math__MulShiftOverflow(); error Uint256x256Math__MulDivOverflow(); /** * @notice Calculates floor(x*y/denominator) with full precision * The result will be rounded down * @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv * Requirements: * - The denominator cannot be zero * - The result must fit within uint256 * Caveats: * - This function does not work with fixed-point numbers * @param x The multiplicand as an uint256 * @param y The multiplier as an uint256 * @param denominator The divisor as an uint256 * @return result The result as an uint256 */ function mulDivRoundDown(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { (uint256 prod0, uint256 prod1) = _getMulProds(x, y); return _getEndOfDivRoundDown(x, y, denominator, prod0, prod1); } /** * @notice Calculates ceil(x*y/denominator) with full precision * The result will be rounded up * @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv * Requirements: * - The denominator cannot be zero * - The result must fit within uint256 * Caveats: * - This function does not work with fixed-point numbers * @param x The multiplicand as an uint256 * @param y The multiplier as an uint256 * @param denominator The divisor as an uint256 * @return result The result as an uint256 */ function mulDivRoundUp(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { result = mulDivRoundDown(x, y, denominator); if (mulmod(x, y, denominator) != 0) result += 1; } /** * @notice Calculates floor(x * y / 2**offset) with full precision * The result will be rounded down * @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv * Requirements: * - The offset needs to be strictly lower than 256 * - The result must fit within uint256 * Caveats: * - This function does not work with fixed-point numbers * @param x The multiplicand as an uint256 * @param y The multiplier as an uint256 * @param offset The offset as an uint256, can't be greater than 256 * @return result The result as an uint256 */ function mulShiftRoundDown(uint256 x, uint256 y, uint8 offset) internal pure returns (uint256 result) { (uint256 prod0, uint256 prod1) = _getMulProds(x, y); if (prod0 != 0) result = prod0 >> offset; if (prod1 != 0) { // Make sure the result is less than 2^256. if (prod1 >= 1 << offset) revert Uint256x256Math__MulShiftOverflow(); unchecked { result += prod1 << (256 - offset); } } } /** * @notice Calculates floor(x * y / 2**offset) with full precision * The result will be rounded down * @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv * Requirements: * - The offset needs to be strictly lower than 256 * - The result must fit within uint256 * Caveats: * - This function does not work with fixed-point numbers * @param x The multiplicand as an uint256 * @param y The multiplier as an uint256 * @param offset The offset as an uint256, can't be greater than 256 * @return result The result as an uint256 */ function mulShiftRoundUp(uint256 x, uint256 y, uint8 offset) internal pure returns (uint256 result) { result = mulShiftRoundDown(x, y, offset); if (mulmod(x, y, 1 << offset) != 0) result += 1; } /** * @notice Calculates floor(x << offset / y) with full precision * The result will be rounded down * @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv * Requirements: * - The offset needs to be strictly lower than 256 * - The result must fit within uint256 * Caveats: * - This function does not work with fixed-point numbers * @param x The multiplicand as an uint256 * @param offset The number of bit to shift x as an uint256 * @param denominator The divisor as an uint256 * @return result The result as an uint256 */ function shiftDivRoundDown(uint256 x, uint8 offset, uint256 denominator) internal pure returns (uint256 result) { uint256 prod0; uint256 prod1; prod0 = x << offset; // Least significant 256 bits of the product unchecked { prod1 = x >> (256 - offset); // Most significant 256 bits of the product } return _getEndOfDivRoundDown(x, 1 << offset, denominator, prod0, prod1); } /** * @notice Calculates ceil(x << offset / y) with full precision * The result will be rounded up * @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv * Requirements: * - The offset needs to be strictly lower than 256 * - The result must fit within uint256 * Caveats: * - This function does not work with fixed-point numbers * @param x The multiplicand as an uint256 * @param offset The number of bit to shift x as an uint256 * @param denominator The divisor as an uint256 * @return result The result as an uint256 */ function shiftDivRoundUp(uint256 x, uint8 offset, uint256 denominator) internal pure returns (uint256 result) { result = shiftDivRoundDown(x, offset, denominator); if (mulmod(x, 1 << offset, denominator) != 0) result += 1; } /** * @notice Helper function to return the result of `x * y` as 2 uint256 * @param x The multiplicand as an uint256 * @param y The multiplier as an uint256 * @return prod0 The least significant 256 bits of the product * @return prod1 The most significant 256 bits of the product */ function _getMulProds(uint256 x, uint256 y) private pure returns (uint256 prod0, uint256 prod1) { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } } /** * @notice Helper function to return the result of `x * y / denominator` with full precision * @param x The multiplicand as an uint256 * @param y The multiplier as an uint256 * @param denominator The divisor as an uint256 * @param prod0 The least significant 256 bits of the product * @param prod1 The most significant 256 bits of the product * @return result The result as an uint256 */ function _getEndOfDivRoundDown(uint256 x, uint256 y, uint256 denominator, uint256 prod0, uint256 prod1) private pure returns (uint256 result) { // Handle non-overflow cases, 256 by 256 division if (prod1 == 0) { unchecked { result = prod0 / denominator; } } else { // Make sure the result is less than 2^256. Also prevents denominator == 0 if (prod1 >= denominator) revert Uint256x256Math__MulDivOverflow(); // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1 // See https://cs.stackexchange.com/q/138556/92363 unchecked { // Does not overflow because the denominator cannot be zero at this stage in the function uint256 lpotdod = denominator & (~denominator + 1); assembly { // Divide denominator by lpotdod. denominator := div(denominator, lpotdod) // Divide [prod1 prod0] by lpotdod. prod0 := div(prod0, lpotdod) // Flip lpotdod such that it is 2^256 / lpotdod. If lpotdod is zero, then it becomes one lpotdod := add(div(sub(0, lpotdod), lpotdod), 1) } // Shift in bits from prod1 into prod0 prod0 |= prod1 * lpotdod; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4 uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; } } } /** * @notice Calculates the square root of x * @dev Credit to OpenZeppelin's Math library under MIT license */ function sqrt(uint256 x) internal pure returns (uint256 sqrtX) { if (x == 0) return 0; uint256 msb = BitMath.mostSignificantBit(x); assembly { sqrtX := shl(shr(1, msb), 1) sqrtX := shr(1, add(sqrtX, div(x, sqrtX))) sqrtX := shr(1, add(sqrtX, div(x, sqrtX))) sqrtX := shr(1, add(sqrtX, div(x, sqrtX))) sqrtX := shr(1, add(sqrtX, div(x, sqrtX))) sqrtX := shr(1, add(sqrtX, div(x, sqrtX))) sqrtX := shr(1, add(sqrtX, div(x, sqrtX))) sqrtX := shr(1, add(sqrtX, div(x, sqrtX))) x := div(x, sqrtX) } return sqrtX < x ? sqrtX : x; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {ILBHooks} from "../interfaces/ILBHooks.sol"; /** * @title Hooks library * @notice This library contains functions that should be used to interact with hooks */ library Hooks { error Hooks__CallFailed(); bytes32 internal constant BEFORE_SWAP_FLAG = bytes32(uint256(1 << 160)); bytes32 internal constant AFTER_SWAP_FLAG = bytes32(uint256(1 << 161)); bytes32 internal constant BEFORE_FLASH_LOAN_FLAG = bytes32(uint256(1 << 162)); bytes32 internal constant AFTER_FLASH_LOAN_FLAG = bytes32(uint256(1 << 163)); bytes32 internal constant BEFORE_MINT_FLAG = bytes32(uint256(1 << 164)); bytes32 internal constant AFTER_MINT_FLAG = bytes32(uint256(1 << 165)); bytes32 internal constant BEFORE_BURN_FLAG = bytes32(uint256(1 << 166)); bytes32 internal constant AFTER_BURN_FLAG = bytes32(uint256(1 << 167)); bytes32 internal constant BEFORE_TRANSFER_FLAG = bytes32(uint256(1 << 168)); bytes32 internal constant AFTER_TRANSFER_FLAG = bytes32(uint256(1 << 169)); struct Parameters { address hooks; bool beforeSwap; bool afterSwap; bool beforeFlashLoan; bool afterFlashLoan; bool beforeMint; bool afterMint; bool beforeBurn; bool afterBurn; bool beforeBatchTransferFrom; bool afterBatchTransferFrom; } /** * @dev Helper function to encode the hooks parameters to a single bytes32 value * @param parameters The hooks parameters * @return hooksParameters The encoded hooks parameters */ function encode(Parameters memory parameters) internal pure returns (bytes32 hooksParameters) { hooksParameters = bytes32(uint256(uint160(address(parameters.hooks)))); if (parameters.beforeSwap) hooksParameters |= BEFORE_SWAP_FLAG; if (parameters.afterSwap) hooksParameters |= AFTER_SWAP_FLAG; if (parameters.beforeFlashLoan) hooksParameters |= BEFORE_FLASH_LOAN_FLAG; if (parameters.afterFlashLoan) hooksParameters |= AFTER_FLASH_LOAN_FLAG; if (parameters.beforeMint) hooksParameters |= BEFORE_MINT_FLAG; if (parameters.afterMint) hooksParameters |= AFTER_MINT_FLAG; if (parameters.beforeBurn) hooksParameters |= BEFORE_BURN_FLAG; if (parameters.afterBurn) hooksParameters |= AFTER_BURN_FLAG; if (parameters.beforeBatchTransferFrom) hooksParameters |= BEFORE_TRANSFER_FLAG; if (parameters.afterBatchTransferFrom) hooksParameters |= AFTER_TRANSFER_FLAG; } /** * @dev Helper function to decode the hooks parameters from a single bytes32 value * @param hooksParameters The encoded hooks parameters * @return parameters The hooks parameters */ function decode(bytes32 hooksParameters) internal pure returns (Parameters memory parameters) { parameters.hooks = getHooks(hooksParameters); parameters.beforeSwap = (hooksParameters & BEFORE_SWAP_FLAG) != 0; parameters.afterSwap = (hooksParameters & AFTER_SWAP_FLAG) != 0; parameters.beforeFlashLoan = (hooksParameters & BEFORE_FLASH_LOAN_FLAG) != 0; parameters.afterFlashLoan = (hooksParameters & AFTER_FLASH_LOAN_FLAG) != 0; parameters.beforeMint = (hooksParameters & BEFORE_MINT_FLAG) != 0; parameters.afterMint = (hooksParameters & AFTER_MINT_FLAG) != 0; parameters.beforeBurn = (hooksParameters & BEFORE_BURN_FLAG) != 0; parameters.afterBurn = (hooksParameters & AFTER_BURN_FLAG) != 0; parameters.beforeBatchTransferFrom = (hooksParameters & BEFORE_TRANSFER_FLAG) != 0; parameters.afterBatchTransferFrom = (hooksParameters & AFTER_TRANSFER_FLAG) != 0; } /** * @dev Helper function to get the hooks address from the encoded hooks parameters * @param hooksParameters The encoded hooks parameters * @return hooks The hooks address */ function getHooks(bytes32 hooksParameters) internal pure returns (address hooks) { hooks = address(uint160(uint256(hooksParameters))); } /** * @dev Helper function to set the hooks address in the encoded hooks parameters * @param hooksParameters The encoded hooks parameters * @param newHooks The new hooks address * @return hooksParameters The updated hooks parameters */ function setHooks(bytes32 hooksParameters, address newHooks) internal pure returns (bytes32) { return bytes32(bytes12(hooksParameters)) | bytes32(uint256(uint160(newHooks))); } /** * @dev Helper function to get the flags from the encoded hooks parameters * @param hooksParameters The encoded hooks parameters * @return flags The flags */ function getFlags(bytes32 hooksParameters) internal pure returns (bytes12 flags) { flags = bytes12(hooksParameters); } /** * @dev Helper function call the onHooksSet function on the hooks contract, only if the * hooksParameters is not 0 * @param hooksParameters The encoded hooks parameters * @param onHooksSetData The data to pass to the onHooksSet function */ function onHooksSet(bytes32 hooksParameters, bytes calldata onHooksSetData) internal { if (hooksParameters != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.onHooksSet.selector, hooksParameters, onHooksSetData) ); } } /** * @dev Helper function to call the beforeSwap function on the hooks contract, only if the * BEFORE_SWAP_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param to The recipient * @param swapForY Whether the swap is for Y * @param amountsIn The amounts in */ function beforeSwap(bytes32 hooksParameters, address sender, address to, bool swapForY, bytes32 amountsIn) internal { if ((hooksParameters & BEFORE_SWAP_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.beforeSwap.selector, sender, to, swapForY, amountsIn) ); } } /** * @dev Helper function to call the afterSwap function on the hooks contract, only if the * AFTER_SWAP_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param to The recipient * @param swapForY Whether the swap is for Y * @param amountsOut The amounts out */ function afterSwap(bytes32 hooksParameters, address sender, address to, bool swapForY, bytes32 amountsOut) internal { if ((hooksParameters & AFTER_SWAP_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.afterSwap.selector, sender, to, swapForY, amountsOut) ); } } /** * @dev Helper function to call the beforeFlashLoan function on the hooks contract, only if the * BEFORE_FLASH_LOAN_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param to The recipient * @param amounts The amounts */ function beforeFlashLoan(bytes32 hooksParameters, address sender, address to, bytes32 amounts) internal { if ((hooksParameters & BEFORE_FLASH_LOAN_FLAG) != 0) { _safeCall(hooksParameters, abi.encodeWithSelector(ILBHooks.beforeFlashLoan.selector, sender, to, amounts)); } } /** * @dev Helper function to call the afterFlashLoan function on the hooks contract, only if the * AFTER_FLASH_LOAN_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param to The recipient * @param fees The fees * @param feesReceived The fees received */ function afterFlashLoan(bytes32 hooksParameters, address sender, address to, bytes32 fees, bytes32 feesReceived) internal { if ((hooksParameters & AFTER_FLASH_LOAN_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.afterFlashLoan.selector, sender, to, fees, feesReceived) ); } } /** * @dev Helper function to call the beforeMint function on the hooks contract, only if the * BEFORE_MINT_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param to The recipient * @param liquidityConfigs The liquidity configs * @param amountsReceived The amounts received */ function beforeMint( bytes32 hooksParameters, address sender, address to, bytes32[] calldata liquidityConfigs, bytes32 amountsReceived ) internal { if ((hooksParameters & BEFORE_MINT_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.beforeMint.selector, sender, to, liquidityConfigs, amountsReceived) ); } } /** * @dev Helper function to call the afterMint function on the hooks contract, only if the * AFTER_MINT_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param to The recipient * @param liquidityConfigs The liquidity configs * @param amountsIn The amounts in */ function afterMint( bytes32 hooksParameters, address sender, address to, bytes32[] calldata liquidityConfigs, bytes32 amountsIn ) internal { if ((hooksParameters & AFTER_MINT_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.afterMint.selector, sender, to, liquidityConfigs, amountsIn) ); } } /** * @dev Helper function to call the beforeBurn function on the hooks contract, only if the * BEFORE_BURN_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param from The sender * @param to The recipient * @param ids The ids * @param amountsToBurn The amounts to burn */ function beforeBurn( bytes32 hooksParameters, address sender, address from, address to, uint256[] calldata ids, uint256[] calldata amountsToBurn ) internal { if ((hooksParameters & BEFORE_BURN_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.beforeBurn.selector, sender, from, to, ids, amountsToBurn) ); } } /** * @dev Helper function to call the afterBurn function on the hooks contract, only if the * AFTER_BURN_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param from The sender * @param to The recipient * @param ids The ids * @param amountsToBurn The amounts to burn */ function afterBurn( bytes32 hooksParameters, address sender, address from, address to, uint256[] calldata ids, uint256[] calldata amountsToBurn ) internal { if ((hooksParameters & AFTER_BURN_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.afterBurn.selector, sender, from, to, ids, amountsToBurn) ); } } /** * @dev Helper function to call the beforeTransferFrom function on the hooks contract, only if the * BEFORE_TRANSFER_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param from The sender * @param to The recipient * @param ids The list of ids * @param amounts The list of amounts */ function beforeBatchTransferFrom( bytes32 hooksParameters, address sender, address from, address to, uint256[] calldata ids, uint256[] calldata amounts ) internal { if ((hooksParameters & BEFORE_TRANSFER_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.beforeBatchTransferFrom.selector, sender, from, to, ids, amounts) ); } } /** * @dev Helper function to call the afterTransferFrom function on the hooks contract, only if the * AFTER_TRANSFER_FLAG is set in the hooksParameters * @param hooksParameters The encoded hooks parameters * @param sender The sender * @param from The sender * @param to The recipient * @param ids The list of ids * @param amounts The list of amounts */ function afterBatchTransferFrom( bytes32 hooksParameters, address sender, address from, address to, uint256[] calldata ids, uint256[] calldata amounts ) internal { if ((hooksParameters & AFTER_TRANSFER_FLAG) != 0) { _safeCall( hooksParameters, abi.encodeWithSelector(ILBHooks.afterBatchTransferFrom.selector, sender, from, to, ids, amounts) ); } } /** * @dev Helper function to call the hooks contract and verify the call was successful * by matching the expected selector with the returned data * @param hooksParameters The encoded hooks parameters * @param data The data to pass to the hooks contract */ function _safeCall(bytes32 hooksParameters, bytes memory data) private { bool success; address hooks = getHooks(hooksParameters); assembly { let expectedSelector := shr(224, mload(add(data, 0x20))) success := call(gas(), hooks, 0, add(data, 0x20), mload(data), 0, 0x20) if and(iszero(success), iszero(iszero(returndatasize()))) { returndatacopy(0, 0, returndatasize()) revert(0, returndatasize()) } success := and(success, and(gt(returndatasize(), 0x1f), eq(shr(224, mload(0)), expectedSelector))) } if (!success) revert Hooks__CallFailed(); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {ILBPair} from "./ILBPair.sol"; import {Hooks} from "../libraries/Hooks.sol"; interface ILBHooks { function getLBPair() external view returns (ILBPair); function isLinked() external view returns (bool); function onHooksSet(bytes32 hooksParameters, bytes calldata onHooksSetData) external returns (bytes4); function beforeSwap(address sender, address to, bool swapForY, bytes32 amountsIn) external returns (bytes4); function afterSwap(address sender, address to, bool swapForY, bytes32 amountsOut) external returns (bytes4); function beforeFlashLoan(address sender, address to, bytes32 amounts) external returns (bytes4); function afterFlashLoan(address sender, address to, bytes32 fees, bytes32 feesReceived) external returns (bytes4); function beforeMint(address sender, address to, bytes32[] calldata liquidityConfigs, bytes32 amountsReceived) external returns (bytes4); function afterMint(address sender, address to, bytes32[] calldata liquidityConfigs, bytes32 amountsIn) external returns (bytes4); function beforeBurn( address sender, address from, address to, uint256[] calldata ids, uint256[] calldata amountsToBurn ) external returns (bytes4); function afterBurn( address sender, address from, address to, uint256[] calldata ids, uint256[] calldata amountsToBurn ) external returns (bytes4); function beforeBatchTransferFrom( address sender, address from, address to, uint256[] calldata ids, uint256[] calldata amounts ) external returns (bytes4); function afterBatchTransferFrom( address sender, address from, address to, uint256[] calldata ids, uint256[] calldata amounts ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; import {IERC1363} from "../../../interfaces/IERC1363.sol"; import {Address} from "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC-20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev An operation with an ERC-20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value))); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value))); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when * targeting contracts. * * Reverts if the returned value is other than `true`. */ function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal { if (to.code.length == 0) { safeTransfer(token, to, value); } else if (!token.transferAndCall(to, value, data)) { revert SafeERC20FailedOperation(address(token)); } } /** * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when * targeting contracts. * * Reverts if the returned value is other than `true`. */ function transferFromAndCallRelaxed( IERC1363 token, address from, address to, uint256 value, bytes memory data ) internal { if (to.code.length == 0) { safeTransferFrom(token, from, to, value); } else if (!token.transferFromAndCall(from, to, value, data)) { revert SafeERC20FailedOperation(address(token)); } } /** * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when * targeting contracts. * * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}. * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall} * once without retrying, and relies on the returned value to be true. * * Reverts if the returned value is other than `true`. */ function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal { if (to.code.length == 0) { forceApprove(token, to, value); } else if (!token.approveAndCall(to, value, data)) { revert SafeERC20FailedOperation(address(token)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; /** * @title Liquidity Book Encoded Library * @author Trader Joe * @notice Helper contract used for decoding bytes32 sample */ library Encoded { uint256 internal constant MASK_UINT1 = 0x1; uint256 internal constant MASK_UINT8 = 0xff; uint256 internal constant MASK_UINT12 = 0xfff; uint256 internal constant MASK_UINT14 = 0x3fff; uint256 internal constant MASK_UINT16 = 0xffff; uint256 internal constant MASK_UINT20 = 0xfffff; uint256 internal constant MASK_UINT24 = 0xffffff; uint256 internal constant MASK_UINT40 = 0xffffffffff; uint256 internal constant MASK_UINT64 = 0xffffffffffffffff; uint256 internal constant MASK_UINT128 = 0xffffffffffffffffffffffffffffffff; /** * @notice Internal function to set a value in an encoded bytes32 using a mask and offset * @dev This function can overflow * @param encoded The previous encoded value * @param value The value to encode * @param mask The mask * @param offset The offset * @return newEncoded The new encoded value */ function set(bytes32 encoded, uint256 value, uint256 mask, uint256 offset) internal pure returns (bytes32 newEncoded) { assembly { newEncoded := and(encoded, not(shl(offset, mask))) newEncoded := or(newEncoded, shl(offset, and(value, mask))) } } /** * @notice Internal function to set a bool in an encoded bytes32 using an offset * @dev This function can overflow * @param encoded The previous encoded value * @param boolean The bool to encode * @param offset The offset * @return newEncoded The new encoded value */ function setBool(bytes32 encoded, bool boolean, uint256 offset) internal pure returns (bytes32 newEncoded) { return set(encoded, boolean ? 1 : 0, MASK_UINT1, offset); } /** * @notice Internal function to decode a bytes32 sample using a mask and offset * @dev This function can overflow * @param encoded The encoded value * @param mask The mask * @param offset The offset * @return value The decoded value */ function decode(bytes32 encoded, uint256 mask, uint256 offset) internal pure returns (uint256 value) { assembly { value := and(shr(offset, encoded), mask) } } /** * @notice Internal function to decode a bytes32 sample into a bool using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return boolean The decoded value as a bool */ function decodeBool(bytes32 encoded, uint256 offset) internal pure returns (bool boolean) { assembly { boolean := and(shr(offset, encoded), MASK_UINT1) } } /** * @notice Internal function to decode a bytes32 sample into a uint8 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value */ function decodeUint8(bytes32 encoded, uint256 offset) internal pure returns (uint8 value) { assembly { value := and(shr(offset, encoded), MASK_UINT8) } } /** * @notice Internal function to decode a bytes32 sample into a uint12 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value as a uint16, since uint12 is not supported */ function decodeUint12(bytes32 encoded, uint256 offset) internal pure returns (uint16 value) { assembly { value := and(shr(offset, encoded), MASK_UINT12) } } /** * @notice Internal function to decode a bytes32 sample into a uint14 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value as a uint16, since uint14 is not supported */ function decodeUint14(bytes32 encoded, uint256 offset) internal pure returns (uint16 value) { assembly { value := and(shr(offset, encoded), MASK_UINT14) } } /** * @notice Internal function to decode a bytes32 sample into a uint16 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value */ function decodeUint16(bytes32 encoded, uint256 offset) internal pure returns (uint16 value) { assembly { value := and(shr(offset, encoded), MASK_UINT16) } } /** * @notice Internal function to decode a bytes32 sample into a uint20 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value as a uint24, since uint20 is not supported */ function decodeUint20(bytes32 encoded, uint256 offset) internal pure returns (uint24 value) { assembly { value := and(shr(offset, encoded), MASK_UINT20) } } /** * @notice Internal function to decode a bytes32 sample into a uint24 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value */ function decodeUint24(bytes32 encoded, uint256 offset) internal pure returns (uint24 value) { assembly { value := and(shr(offset, encoded), MASK_UINT24) } } /** * @notice Internal function to decode a bytes32 sample into a uint40 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value */ function decodeUint40(bytes32 encoded, uint256 offset) internal pure returns (uint40 value) { assembly { value := and(shr(offset, encoded), MASK_UINT40) } } /** * @notice Internal function to decode a bytes32 sample into a uint64 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value */ function decodeUint64(bytes32 encoded, uint256 offset) internal pure returns (uint64 value) { assembly { value := and(shr(offset, encoded), MASK_UINT64) } } /** * @notice Internal function to decode a bytes32 sample into a uint128 using an offset * @dev This function can overflow * @param encoded The encoded value * @param offset The offset * @return value The decoded value */ function decodeUint128(bytes32 encoded, uint256 offset) internal pure returns (uint128 value) { assembly { value := and(shr(offset, encoded), MASK_UINT128) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.20; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ```solidity * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Storage of the initializable contract. * * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions * when using with upgradeable contracts. * * @custom:storage-location erc7201:openzeppelin.storage.Initializable */ struct InitializableStorage { /** * @dev Indicates that the contract has been initialized. */ uint64 _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool _initializing; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00; /** * @dev The contract is already initialized. */ error InvalidInitialization(); /** * @dev The contract is not initializing. */ error NotInitializing(); /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint64 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in * production. * * Emits an {Initialized} event. */ modifier initializer() { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); // Cache values to avoid duplicated sloads bool isTopLevelCall = !$._initializing; uint64 initialized = $._initialized; // Allowed calls: // - initialSetup: the contract is not in the initializing state and no previous version was // initialized // - construction: the contract is initialized at version 1 (no reininitialization) and the // current contract is just being deployed bool initialSetup = initialized == 0 && isTopLevelCall; bool construction = initialized == 1 && address(this).code.length == 0; if (!initialSetup && !construction) { revert InvalidInitialization(); } $._initialized = 1; if (isTopLevelCall) { $._initializing = true; } _; if (isTopLevelCall) { $._initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint64 version) { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing || $._initialized >= version) { revert InvalidInitialization(); } $._initialized = version; $._initializing = true; _; $._initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { _checkInitializing(); _; } /** * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}. */ function _checkInitializing() internal view virtual { if (!_isInitializing()) { revert NotInitializing(); } } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing) { revert InvalidInitialization(); } if ($._initialized != type(uint64).max) { $._initialized = type(uint64).max; emit Initialized(type(uint64).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint64) { return _getInitializableStorage()._initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _getInitializableStorage()._initializing; } /** * @dev Returns a pointer to the storage namespace. */ // solhint-disable-next-line var-name-mixedcase function _getInitializableStorage() private pure returns (InitializableStorage storage $) { assembly { $.slot := INITIALIZABLE_STORAGE } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; /** * @title Liquidity Book Token Interface * @author Trader Joe * @notice Interface to interact with the LBToken. */ interface ILBToken { error LBToken__AddressThisOrZero(); error LBToken__InvalidLength(); error LBToken__SelfApproval(address owner); error LBToken__SpenderNotApproved(address from, address spender); error LBToken__TransferExceedsBalance(address from, uint256 id, uint256 amount); error LBToken__BurnExceedsBalance(address from, uint256 id, uint256 amount); event TransferBatch( address indexed sender, address indexed from, address indexed to, uint256[] ids, uint256[] amounts ); event ApprovalForAll(address indexed account, address indexed sender, bool approved); function name() external view returns (string memory); function symbol() external view returns (string memory); function totalSupply(uint256 id) external view returns (uint256); function balanceOf(address account, uint256 id) external view returns (uint256); function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory); function isApprovedForAll(address owner, address spender) external view returns (bool); function approveForAll(address spender, bool approved) external; function batchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; import {Constants} from "../Constants.sol"; import {BitMath} from "./BitMath.sol"; /** * @title Liquidity Book Uint128x128 Math Library * @author Trader Joe * @notice Helper contract used for power and log calculations */ library Uint128x128Math { using BitMath for uint256; error Uint128x128Math__LogUnderflow(); error Uint128x128Math__PowUnderflow(uint256 x, int256 y); uint256 constant LOG_SCALE_OFFSET = 127; uint256 constant LOG_SCALE = 1 << LOG_SCALE_OFFSET; uint256 constant LOG_SCALE_SQUARED = LOG_SCALE * LOG_SCALE; /** * @notice Calculates the binary logarithm of x. * @dev Based on the iterative approximation algorithm. * https://en.wikipedia.org/wiki/Binary_logarithm#Iterative_approximation * Requirements: * - x must be greater than zero. * Caveats: * - The results are not perfectly accurate to the last decimal, due to the lossy precision of the iterative approximation * Also because x is converted to an unsigned 129.127-binary fixed-point number during the operation to optimize the multiplication * @param x The unsigned 128.128-binary fixed-point number for which to calculate the binary logarithm. * @return result The binary logarithm as a signed 128.128-binary fixed-point number. */ function log2(uint256 x) internal pure returns (int256 result) { // Convert x to a unsigned 129.127-binary fixed-point number to optimize the multiplication. // If we use an offset of 128 bits, y would need 129 bits and y**2 would would overflow and we would have to // use mulDiv, by reducing x to 129.127-binary fixed-point number we assert that y will use 128 bits, and we // can use the regular multiplication if (x == 1) return -128; if (x == 0) revert Uint128x128Math__LogUnderflow(); x >>= 1; unchecked { // This works because log2(x) = -log2(1/x). int256 sign; if (x >= LOG_SCALE) { sign = 1; } else { sign = -1; // Do the fixed-point inversion inline to save gas x = LOG_SCALE_SQUARED / x; } // Calculate the integer part of the logarithm and add it to the result and finally calculate y = x * 2^(-n). uint256 n = (x >> LOG_SCALE_OFFSET).mostSignificantBit(); // The integer part of the logarithm as a signed 129.127-binary fixed-point number. The operation can't overflow // because n is maximum 255, LOG_SCALE_OFFSET is 127 bits and sign is either 1 or -1. result = int256(n) << LOG_SCALE_OFFSET; // This is y = x * 2^(-n). uint256 y = x >> n; // If y = 1, the fractional part is zero. if (y != LOG_SCALE) { // Calculate the fractional part via the iterative approximation. // The "delta >>= 1" part is equivalent to "delta /= 2", but shifting bits is faster. for (int256 delta = int256(1 << (LOG_SCALE_OFFSET - 1)); delta > 0; delta >>= 1) { y = (y * y) >> LOG_SCALE_OFFSET; // Is y^2 > 2 and so in the range [2,4)? if (y >= 1 << (LOG_SCALE_OFFSET + 1)) { // Add the 2^(-m) factor to the logarithm. result += delta; // Corresponds to z/2 on Wikipedia. y >>= 1; } } } // Convert x back to unsigned 128.128-binary fixed-point number result = (result * sign) << 1; } } /** * @notice Returns the value of x^y. It calculates `1 / x^abs(y)` if x is bigger than 2^128. * At the end of the operations, we invert the result if needed. * @param x The unsigned 128.128-binary fixed-point number for which to calculate the power * @param y A relative number without any decimals, needs to be between ]-2^21; 2^21[ */ function pow(uint256 x, int256 y) internal pure returns (uint256 result) { bool invert; uint256 absY; if (y == 0) return Constants.SCALE; assembly { absY := y if slt(absY, 0) { absY := sub(0, absY) invert := iszero(invert) } } if (absY < 0x100000) { result = Constants.SCALE; assembly { let squared := x if gt(x, 0xffffffffffffffffffffffffffffffff) { squared := div(not(0), squared) invert := iszero(invert) } if and(absY, 0x1) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x2) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x4) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x8) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x10) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x20) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x40) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x80) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x100) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x200) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x400) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x800) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x1000) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x2000) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x4000) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x8000) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x10000) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x20000) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x40000) { result := shr(128, mul(result, squared)) } squared := shr(128, mul(squared, squared)) if and(absY, 0x80000) { result := shr(128, mul(result, squared)) } } } // revert if y is too big or if x^y underflowed if (result == 0) revert Uint128x128Math__PowUnderflow(x, y); return invert ? type(uint256).max / result : result; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; /** * @title Liquidity Book Bit Math Library * @author Trader Joe * @notice Helper contract used for bit calculations */ library BitMath { /** * @dev Returns the index of the closest bit on the right of x that is non null * @param x The value as a uint256 * @param bit The index of the bit to start searching at * @return id The index of the closest non null bit on the right of x. * If there is no closest bit, it returns max(uint256) */ function closestBitRight(uint256 x, uint8 bit) internal pure returns (uint256 id) { unchecked { uint256 shift = 255 - bit; x <<= shift; // can't overflow as it's non-zero and we shifted it by `_shift` return (x == 0) ? type(uint256).max : mostSignificantBit(x) - shift; } } /** * @dev Returns the index of the closest bit on the left of x that is non null * @param x The value as a uint256 * @param bit The index of the bit to start searching at * @return id The index of the closest non null bit on the left of x. * If there is no closest bit, it returns max(uint256) */ function closestBitLeft(uint256 x, uint8 bit) internal pure returns (uint256 id) { unchecked { x >>= bit; return (x == 0) ? type(uint256).max : leastSignificantBit(x) + bit; } } /** * @dev Returns the index of the most significant bit of x * This function returns 0 if x is 0 * @param x The value as a uint256 * @return msb The index of the most significant bit of x */ function mostSignificantBit(uint256 x) internal pure returns (uint8 msb) { assembly { if gt(x, 0xffffffffffffffffffffffffffffffff) { x := shr(128, x) msb := 128 } if gt(x, 0xffffffffffffffff) { x := shr(64, x) msb := add(msb, 64) } if gt(x, 0xffffffff) { x := shr(32, x) msb := add(msb, 32) } if gt(x, 0xffff) { x := shr(16, x) msb := add(msb, 16) } if gt(x, 0xff) { x := shr(8, x) msb := add(msb, 8) } if gt(x, 0xf) { x := shr(4, x) msb := add(msb, 4) } if gt(x, 0x3) { x := shr(2, x) msb := add(msb, 2) } if gt(x, 0x1) { msb := add(msb, 1) } } } /** * @dev Returns the index of the least significant bit of x * This function returns 255 if x is 0 * @param x The value as a uint256 * @return lsb The index of the least significant bit of x */ function leastSignificantBit(uint256 x) internal pure returns (uint8 lsb) { assembly { let sx := shl(128, x) if iszero(iszero(sx)) { lsb := 128 x := sx } sx := shl(64, x) if iszero(iszero(sx)) { x := sx lsb := add(lsb, 64) } sx := shl(32, x) if iszero(iszero(sx)) { x := sx lsb := add(lsb, 32) } sx := shl(16, x) if iszero(iszero(sx)) { x := sx lsb := add(lsb, 16) } sx := shl(8, x) if iszero(iszero(sx)) { x := sx lsb := add(lsb, 8) } sx := shl(4, x) if iszero(iszero(sx)) { x := sx lsb := add(lsb, 4) } sx := shl(2, x) if iszero(iszero(sx)) { x := sx lsb := add(lsb, 2) } if iszero(iszero(shl(1, x))) { lsb := add(lsb, 1) } lsb := sub(255, lsb) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1363.sol) pragma solidity ^0.8.20; import {IERC20} from "./IERC20.sol"; import {IERC165} from "./IERC165.sol"; /** * @title IERC1363 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363]. * * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction. */ interface IERC1363 is IERC20, IERC165 { /* * Note: the ERC-165 identifier for this interface is 0xb0202a11. * 0xb0202a11 === * bytes4(keccak256('transferAndCall(address,uint256)')) ^ * bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^ * bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^ * bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^ * bytes4(keccak256('approveAndCall(address,uint256)')) ^ * bytes4(keccak256('approveAndCall(address,uint256,bytes)')) */ /** * @dev Moves a `value` amount of tokens from the caller's account to `to` * and then calls {IERC1363Receiver-onTransferReceived} on `to`. * @param to The address which you want to transfer to. * @param value The amount of tokens to be transferred. * @return A boolean value indicating whether the operation succeeded unless throwing. */ function transferAndCall(address to, uint256 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from the caller's account to `to` * and then calls {IERC1363Receiver-onTransferReceived} on `to`. * @param to The address which you want to transfer to. * @param value The amount of tokens to be transferred. * @param data Additional data with no specified format, sent in call to `to`. * @return A boolean value indicating whether the operation succeeded unless throwing. */ function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism * and then calls {IERC1363Receiver-onTransferReceived} on `to`. * @param from The address which you want to send tokens from. * @param to The address which you want to transfer to. * @param value The amount of tokens to be transferred. * @return A boolean value indicating whether the operation succeeded unless throwing. */ function transferFromAndCall(address from, address to, uint256 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism * and then calls {IERC1363Receiver-onTransferReceived} on `to`. * @param from The address which you want to send tokens from. * @param to The address which you want to transfer to. * @param value The amount of tokens to be transferred. * @param data Additional data with no specified format, sent in call to `to`. * @return A boolean value indicating whether the operation succeeded unless throwing. */ function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool); /** * @dev Sets a `value` amount of tokens as the allowance of `spender` over the * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`. * @param spender The address which will spend the funds. * @param value The amount of tokens to be spent. * @return A boolean value indicating whether the operation succeeded unless throwing. */ function approveAndCall(address spender, uint256 value) external returns (bool); /** * @dev Sets a `value` amount of tokens as the allowance of `spender` over the * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`. * @param spender The address which will spend the funds. * @param value The amount of tokens to be spent. * @param data Additional data with no specified format, sent in call to `spender`. * @return A boolean value indicating whether the operation succeeded unless throwing. */ function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol) pragma solidity ^0.8.20; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert FailedInnerCall(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../token/ERC20/IERC20.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol) pragma solidity ^0.8.20; import {IERC165} from "../utils/introspection/IERC165.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC-165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[ERC]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.