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Easy introduction to web3 development based on Ethereum with FMZ

Author: Inventors quantify - small dreams, Created: 2023-03-28 13:32:48, Updated: 2024-11-11 22:28:24

name":“token”,“type”:“address”}],“name”:“approveZeroThenMax”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”}],“name”:“approveZeroThenMaxMinusOne”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“bytes”,“name”:“data”,“type”:“bytes”}],“name”:“callPositionManager”,“outputs”:[{“internalType”:“bytes”,“name”:“result”,“type”:“bytes”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“bytes[]”,“name”:“paths”,“type”:“bytes[]”},{“internalType”:“uint128[]”,“name”:“amounts”,“type”:“uint128[]”},{“internalType”:“uint24”,“name”:“maximumTickDivergence”,“type”:“uint24”},{“internalType”:“uint32”,“name”:“secondsAgo”,“type”:“uint32”}],“name”:“checkOracleSlippage”,“outputs”:[],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“bytes”,“name”:“path”,“type”:“bytes”},{“internalType”:“uint24”,“name”:“maximumTickDivergence”,“type”:“uint24”},{“internalType”:“uint32”,“name”:“secondsAgo”,“type”:“uint32”}],“name”:“checkOracleSlippage”,“outputs”:[],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“components”:[{“internalType”:“bytes”,“name”:“path”,“type”:“bytes”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“uint256”,“name”:“amountIn”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amountOutMinimum”,“type”:“uint256”}],“internalType”:“struct IV3SwapRouter.ExactInputParams”,“name”:“params”,“type”:“tuple”}],“name”:“exactInput”,“outputs”:[{“internalType”:“uint256”,“name”:“amountOut”,“type”:“uint256”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“components”:[{“internalType”:“address”,“name”:“tokenIn”,“type”:“address”},{“internalType”:“address”,“name”:“tokenOut”,“type”:“address”},{“internalType”:“uint24”,“name”:“fee”,“type”:“uint24”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“uint256”,“name”:“amountIn”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amountOutMinimum”,“type”:“uint256”},{“internalType”:“uint160”,“name”:“sqrtPriceLimitX96”,“type”:“uint160”}],“internalType”:“struct IV3SwapRouter.ExactInputSingleParams”,“name”:“params”,“type”:“tuple”}],“name”:“exactInputSingle”,“outputs”:[{“internalType”:“uint256”,“name”:“amountOut”,“type”:“uint256”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“components”:[{“internalType”:“bytes”,“name”:“path”,“type”:“bytes”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“uint256”,“name”:“amountOut”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amountInMaximum”,“type”:“uint256”}],“internalType”:“struct IV3SwapRouter.ExactOutputParams”,“name”:“params”,“type”:“tuple”}],“name”:“exactOutput”,“outputs”:[{“internalType”:“uint256”,“name”:“amountIn”,“type”:“uint256”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“components”:[{“internalType”:“address”,“name”:“tokenIn”,“type”:“address”},{“internalType”:“address”,“name”:“tokenOut”,“type”:“address”},{“internalType”:“uint24”,“name”:“fee”,“type”:“uint24”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“uint256”,“name”:“amountOut”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amountInMaximum”,“type”:“uint256”},{“internalType”:“uint160”,“name”:“sqrtPriceLimitX96”,“type”:“uint160”}],“internalType”:“struct IV3SwapRouter.ExactOutputSingleParams”,“name”:“params”,“type”:“tuple”}],“name”:“exactOutputSingle”,“outputs”:[{“internalType”:“uint256”,“name”:“amountIn”,“type”:“uint256”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[],“name”:“factory”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“factoryV2”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“amount”,“type”:“uint256”}],“name”:“getApprovalType”,“outputs”:[{“internalType”:“enum IApproveAndCall.ApprovalType”,“name”:"",“type”:“uint8”}],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“components”:[{“internalType”:“address”,“name”:“token0”,“type”:“address”},{“internalType”:“address”,“name”:“token1”,“type”:“address”},{“internalType”:“uint256”,“name”:“tokenId”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amount0Min”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amount1Min”,“type”:“uint256”}],“internalType”:“struct IApproveAndCall.IncreaseLiquidityParams”,“name”:“params”,“type”:“tuple”}],“name”:“increaseLiquidity”,“outputs”:[{“internalType”:“bytes”,“name”:“result”,“type”:“bytes”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“components”:[{“internalType”:“address”,“name”:“token0”,“type”:“address”},{“internalType”:“address”,“name”:“token1”,“type”:“address”},{“internalType”:“uint24”,“name”:“fee”,“type”:“uint24”},{“internalType”:“int24”,“name”:“tickLower”,“type”:“int24”},{“internalType”:“int24”,“name”:“tickUpper”,“type”:“int24”},{“internalType”:“uint256”,“name”:“amount0Min”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amount1Min”,“type”:“uint256”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”}],“internalType”:“struct IApproveAndCall.MintParams”,“name”:“params”,“type”:“tuple”}],“name”:“mint”,“outputs”:[{“internalType”:“bytes”,“name”:“result”,“type”:“bytes”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“bytes32”,“name”:“previousBlockhash”,“type”:“bytes32”},{“internalType”:“bytes[]”,“name”:“data”,“type”:“bytes[]”}],“name”:“multicall”,“outputs”:[{“internalType”:“bytes[]”,“name”:"",“type”:“bytes[]”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:“deadline”,“type”:“uint256”},{“internalType”:“bytes[]”,“name”:“data”,“type”:“bytes[]”}],“name”:“multicall”,“outputs”:[{“internalType”:“bytes[]”,“name”:"",“type”:“bytes[]”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“bytes[]”,“name”:“data”,“type”:“bytes[]”}],“name”:“multicall”,“outputs”:[{“internalType”:“bytes[]”,“name”:“results”,“type”:“bytes[]”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[],“name”:“positionManager”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“value”,“type”:“uint256”}],“name”:“pull”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[],“name”:“refundETH”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“value”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“deadline”,“type”:“uint256”},{“internalType”:“uint8”,“name”:“v”,“type”:“uint8”},{“internalType”:“bytes32”,“name”:“r”,“type”:“bytes32”},{“internalType”:“bytes32”,“name”:“s”,“type”:“bytes32”}],“name”:“selfPermit”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“nonce”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“expiry”,“type”:“uint256”},{“internalType”:“uint8”,“name”:“v”,“type”:“uint8”},{“internalType”:“bytes32”,“name”:“r”,“type”:“bytes32”},{“internalType”:“bytes32”,“name”:“s”,“type”:“bytes32”}],“name”:“selfPermitAllowed”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“nonce”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“expiry”,“type”:“uint256”},{“internalType”:“uint8”,“name”:“v”,“type”:“uint8”},{“internalType”:“bytes32”,“name”:“r”,“type”:“bytes32”},{“internalType”:“bytes32”,“name”:“s”,“type”:“bytes32”}],“name”:“selfPermitAllowedIfNecessary”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“value”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“deadline”,“type”:“uint256”},{“internalType”:“uint8”,“name”:“v”,“type”:“uint8”},{“internalType”:“bytes32”,“name”:“r”,“type”:“bytes32”},{“internalType”:“bytes32”,“name”:“s”,“type”:“bytes32”}],“name”:“selfPermitIfNecessary”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:“amountIn”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amountOutMin”,“type”:“uint256”},{“internalType”:“address[]”,“name”:“path”,“type”:“address[]”},{“internalType”:“address”,“name”:“to”,“type”:“address”}],“name”:“swapExactTokensForTokens”,“outputs”:[{“internalType”:“uint256”,“name”:“amountOut”,“type”:“uint256”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:“amountOut”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amountInMax”,“type”:“uint256”},{“internalType”:“address[]”,“name”:“path”,“type”:“address[]”},{“internalType”:“address”,“name”:“to”,“type”:“address”}],“name”:“swapTokensForExactTokens”,“outputs”:[{“internalType”:“uint256”,“name”:“amountIn”,“type”:“uint256”}],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“amountMinimum”,“type”:“uint256”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”}],“name”:“sweepToken”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“amountMinimum”,“type”:“uint256”}],“name”:“sweepToken”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“amountMinimum”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“feeBips”,“type”:“uint256”},{“internalType”:“address”,“name”:“feeRecipient”,“type”:“address”}],“name”:“sweepTokenWithFee”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“token”,“type”:“address”},{“internalType”:“uint256”,“name”:“amountMinimum”,“type”:“uint256”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“uint256”,“name”:“feeBips”,“type”:“uint256”},{“internalType”:“address”,“name”:“feeRecipient”,“type”:“address”}],“name”:“sweepTokenWithFee”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“int256”,“name”:“amount0Delta”,“type”:“int256”},{“internalType”:“int256”,“name”:“amount1Delta”,“type”:“int256”},{“internalType”:“bytes”,“name”:"_data",“type”:“bytes”}],“name”:“uniswapV3SwapCallback”,“outputs”:[],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:“amountMinimum”,“type”:“uint256”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”}],“name”:“unwrapWETH9”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:“amountMinimum”,“type”:“uint256”}],“name”:“unwrapWETH9”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:“amountMinimum”,“type”:“uint256”},{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“uint256”,“name”:“feeBips”,“type”:“uint256”},{“internalType”:“address”,“name”:“feeRecipient”,“type”:“address”}],“name”:“unwrapWETH9WithFee”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:“amountMinimum”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“feeBips”,“type”:“uint256”},{“internalType”:“address”,“name”:“feeRecipient”,“type”:“address”}],“name”:“unwrapWETH9WithFee”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:“value”,“type”:“uint256”}],“name”:“wrapETH”,“outputs”:[],“stateMutability”:“payable”,“type”:“function”},{“stateMutability”:“payable”,“type”:“receive”}]’; var abiPool = ‘[{“inputs”:[],“stateMutability”:“nonpayable”,“type”:“constructor”},{“anonymous”:false,“inputs”:[{“indexed”:true,“internalType”:“address”,“name”:“owner”,“type”:“address”},{“indexed”:true,“internalType”:“int24”,“name”:“tickLower”,“type”:“int24”},{“indexed”:true,“internalType”:“int24”,“name”:“tickUpper”,“type”:“int24”},{“indexed”:false,“internalType”:“uint128”,“name”:“amount”,“type”:“uint128”},{“indexed”:false,“internalType”:“uint256”,“name”:“amount0”,“type”:“uint256”},{“indexed”:false,“internalType”:“uint256”,“name”:“amount1”,“type”:“uint256”}],“name”:“Burn”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:true,“internalType”:“address”,“name”:“owner”,“type”:“address”},{“indexed”:false,“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“indexed”:true,“internalType”:“int24”,“name”:“tickLower”,“type”:“int24”},{“indexed”:true,“internalType”:“int24”,“name”:“tickUpper”,“type”:“int24”},{“indexed”:false,“internalType”:“uint128”,“name”:“amount0”,“type”:“uint128”},{“indexed”:false,“internalType”:“uint128”,“name”:“amount1”,“type”:“uint128”}],“name”:“Collect”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:true,“internalType”:“address”,“name”:“sender”,“type”:“address”},{“indexed”:true,“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“indexed”:false,“internalType”:“uint128”,“name”:“amount0”,“type”:“uint128”},{“indexed”:false,“internalType”:“uint128”,“name”:“amount1”,“type”:“uint128”}],“name”:“CollectProtocol”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:true,“internalType”:“address”,“name”:“sender”,“type”:“address”},{“indexed”:true,“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“indexed”:false,“internalType”:“uint256”,“name”:“amount0”,“type”:“uint256”},{“indexed”:false,“internalType”:“uint256”,“name”:“amount1”,“type”:“uint256”},{“indexed”:false,“internalType”:“uint256”,“name”:“paid0”,“type”:“uint256”},{“indexed”:false,“internalType”:“uint256”,“name”:“paid1”,“type”:“uint256”}],“name”:“Flash”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:false,“internalType”:“uint16”,“name”:“observationCardinalityNextOld”,“type”:“uint16”},{“indexed”:false,“internalType”:“uint16”,“name”:“observationCardinalityNextNew”,“type”:“uint16”}],“name”:“IncreaseObservationCardinalityNext”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:false,“internalType”:“uint160”,“name”:“sqrtPriceX96”,“type”:“uint160”},{“indexed”:false,“internalType”:“int24”,“name”:“tick”,“type”:“int24”}],“name”:“Initialize”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:false,“internalType”:“address”,“name”:“sender”,“type”:“address”},{“indexed”:true,“internalType”:“address”,“name”:“owner”,“type”:“address”},{“indexed”:true,“internalType”:“int24”,“name”:“tickLower”,“type”:“int24”},{“indexed”:true,“internalType”:“int24”,“name”:“tickUpper”,“type”:“int24”},{“indexed”:false,“internalType”:“uint128”,“name”:“amount”,“type”:“uint128”},{“indexed”:false,“internalType”:“uint256”,“name”:“amount0”,“type”:“uint256”},{“indexed”:false,“internalType”:“uint256”,“name”:“amount1”,“type”:“uint256”}],“name”:“Mint”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:false,“internalType”:“uint8”,“name”:“feeProtocol0Old”,“type”:“uint8”},{“indexed”:false,“internalType”:“uint8”,“name”:“feeProtocol1Old”,“type”:“uint8”},{“indexed”:false,“internalType”:“uint8”,“name”:“feeProtocol0New”,“type”:“uint8”},{“indexed”:false,“internalType”:“uint8”,“name”:“feeProtocol1New”,“type”:“uint8”}],“name”:“SetFeeProtocol”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:true,“internalType”:“address”,“name”:“sender”,“type”:“address”},{“indexed”:true,“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“indexed”:false,“internalType”:“int256”,“name”:“amount0”,“type”:“int256”},{“indexed”:false,“internalType”:“int256”,“name”:“amount1”,“type”:“int256”},{“indexed”:false,“internalType”:“uint160”,“name”:“sqrtPriceX96”,“type”:“uint160”},{“indexed”:false,“internalType”:“uint128”,“name”:“liquidity”,“type”:“uint128”},{“indexed”:false,“internalType”:“int24”,“name”:“tick”,“type”:“int24”}],“name”:“Swap”,“type”:“event”},{“inputs”:[{“internalType”:“int24”,“name”:“tickLower”,“type”:“int24”},{“internalType”:“int24”,“name”:“tickUpper”,“type”:“int24”},{“internalType”:“uint128”,“name”:“amount”,“type”:“uint128”}],“name”:“burn”,“outputs”:[{“internalType”:“uint256”,“name”:“amount0”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amount1”,“type”:“uint256”}],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“int24”,“name”:“tickLower”,“type”:“int24”},{“internalType”:“int24”,“name”:“tickUpper”,“type”:“int24”},{“internalType”:“uint128”,“name”:“amount0Requested”,“type”:“uint128”},{“internalType”:“uint128”,“name”:“amount1Requested”,“type”:“uint128”}],“name”:“collect”,“outputs”:[{“internalType”:“uint128”,“name”:“amount0”,“type”:“uint128”},{“internalType”:“uint128”,“name”:“amount1”,“type”:“uint128”}],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“uint128”,“name”:“amount0Requested”,“type”:“uint128”},{“internalType”:“uint128”,“name”:“amount1Requested”,“type”:“uint128”}],“name”:“collectProtocol”,“outputs”:[{“internalType”:“uint128”,“name”:“amount0”,“type”:“uint128”},{“internalType”:“uint128”,“name”:“amount1”,“type”:“uint128”}],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[],“name”:“factory”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“fee”,“outputs”:[{“internalType”:“uint24”,“name”:"",“type”:“uint24”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“feeGrowthGlobal0X128”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“feeGrowthGlobal1X128”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“uint256”,“name”:“amount0”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amount1”,“type”:“uint256”},{“internalType”:“bytes”,“name”:“data”,“type”:“bytes”}],“name”:“flash”,“outputs”:[],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“uint16”,“name”:“observationCardinalityNext”,“type”:“uint16”}],“name”:“increaseObservationCardinalityNext”,“outputs”:[],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“uint160”,“name”:“sqrtPriceX96”,“type”:“uint160”}],“name”:“initialize”,“outputs”:[],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[],“name”:“liquidity”,“outputs”:[{“internalType”:“uint128”,“name”:"",“type”:“uint128”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“maxLiquidityPerTick”,“outputs”:[{“internalType”:“uint128”,“name”:"",“type”:“uint128”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“int24”,“name”:“tickLower”,“type”:“int24”},{“internalType”:“int24”,“name”:“tickUpper”,“type”:“int24”},{“internalType”:“uint128”,“name”:“amount”,“type”:“uint128”},{“internalType”:“bytes”,“name”:“data”,“type”:“bytes”}],“name”:“mint”,“outputs”:[{“internalType”:“uint256”,“name”:“amount0”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“amount1”,“type”:“uint256”}],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“name”:“observations”,“outputs”:[{“internalType”:“uint32”,“name”:“blockTimestamp”,“type”:“uint32”},{“internalType”:“int56”,“name”:“tickCumulative”,“type”:“int56”},{“internalType”:“uint160”,“name”:“secondsPerLiquidityCumulativeX128”,“type”:“uint160”},{“internalType”:“bool”,“name”:“initialized”,“type”:“bool”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“uint32[]”,“name”:“secondsAgos”,“type”:“uint32[]”}],“name”:“observe”,“outputs”:[{“internalType”:“int56[]”,“name”:“tickCumulatives”,“type”:“int56[]”},{“internalType”:“uint160[]”,“name”:“secondsPerLiquidityCumulativeX128s”,“type”:“uint160[]”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“bytes32”,“name”:"",“type”:“bytes32”}],“name”:“positions”,“outputs”:[{“internalType”:“uint128”,“name”:“liquidity”,“type”:“uint128”},{“internalType”:“uint256”,“name”:“feeGrowthInside0LastX128”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“feeGrowthInside1LastX128”,“type”:“uint256”},{“internalType”:“uint128”,“name”:“tokensOwed0”,“type”:“uint128”},{“internalType”:“uint128”,“name”:“tokensOwed1”,“type”:“uint128”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“protocolFees”,“outputs”:[{“internalType”:“uint128”,“name”:“token0”,“type”:“uint128”},{“internalType”:“uint128”,“name”:“token1”,“type”:“uint128”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“uint8”,“name”:“feeProtocol0”,“type”:“uint8”},{“internalType”:“uint8”,“name”:“feeProtocol1”,“type”:“uint8”}],“name”:“setFeeProtocol”,“outputs”:[],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[],“name”:“slot0”,“outputs”:[{“internalType”:“uint160”,“name”:“sqrtPriceX96”,“type”:“uint160”},{“internalType”:“int24”,“name”:“tick”,“type”:“int24”},{“internalType”:“uint16”,“name”:“observationIndex”,“type”:“uint16”},{“internalType”:“uint16”,“name”:“observationCardinality”,“type”:“uint16”},{“internalType”:“uint16”,“name”:“observationCardinalityNext”,“type”:“uint16”},{“internalType”:“uint8”,“name”:“feeProtocol”,“type”:“uint8”},{“internalType”:“bool”,“name”:“unlocked”,“type”:“bool”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“int24”,“name”:“tickLower”,“type”:“int24”},{“internalType”:“int24”,“name”:“tickUpper”,“type”:“int24”}],“name”:“snapshotCumulativesInside”,“outputs”:[{“internalType”:“int56”,“name”:“tickCumulativeInside”,“type”:“int56”},{“internalType”:“uint160”,“name”:“secondsPerLiquidityInsideX128”,“type”:“uint160”},{“internalType”:“uint32”,“name”:“secondsInside”,“type”:“uint32”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:“recipient”,“type”:“address”},{“internalType”:“bool”,“name”:“zeroForOne”,“type”:“bool”},{“internalType”:“int256”,“name”:“amountSpecified”,“type”:“int256”},{“internalType”:“uint160”,“name”:“sqrtPriceLimitX96”,“type”:“uint160”},{“internalType”:“bytes”,“name”:“data”,“type”:“bytes”}],“name”:“swap”,“outputs”:[{“internalType”:“int256”,“name”:“amount0”,“type”:“int256”},{“internalType”:“int256”,“name”:“amount1”,“type”:“int256”}],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“int16”,“name”:"",“type”:“int16”}],“name”:“tickBitmap”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“tickSpacing”,“outputs”:[{“internalType”:“int24”,“name”:"",“type”:“int24”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“int24”,“name”:"",“type”:“int24”}],“name”:“ticks”,“outputs”:[{“internalType”:“uint128”,“name”:“liquidityGross”,“type”:“uint128”},{“internalType”:“int128”,“name”:“liquidityNet”,“type”:“int128”},{“internalType”:“uint256”,“name”:“feeGrowthOutside0X128”,“type”:“uint256”},{“internalType”:“uint256”,“name”:“feeGrowthOutside1X128”,“type”:“uint256”},{“internalType”:“int56”,“name”:“tickCumulativeOutside”,“type”:“int56”},{“internalType”:“uint160”,“name”:“secondsPerLiquidityOutsideX128”,“type”:“uint160”},{“internalType”:“uint32”,“name”:“secondsOutside”,“type”:“uint32”},{“internalType”:“bool”,“name”:“initialized”,“type”:“bool”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“token0”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“token1”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“stateMutability”:“view”,“type”:“function”}]’ var abiFactory = ‘[{“inputs”:[],“stateMutability”:“nonpayable”,“type”:“constructor”},{“anonymous”:false,“inputs”:[{“indexed”:true,“internalType”:“uint24”,“name”:“fee”,“type”:“uint24”},{“indexed”:true,“internalType”:“int24”,“name”:“tickSpacing”,“type”:“int24”}],“name”:“FeeAmountEnabled”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:true,“internalType”:“address”,“name”:“oldOwner”,“type”:“address”},{“indexed”:true,“internalType”:“address”,“name”:“newOwner”,“type”:“address”}],“name”:“OwnerChanged”,“type”:“event”},{“anonymous”:false,“inputs”:[{“indexed”:true,“internalType”:“address”,“name”:“token0”,“type”:“address”},{“indexed”:true,“internalType”:“address”,“name”:“token1”,“type”:“address”},{“indexed”:true,“internalType”:“uint24”,“name”:“fee”,“type”:“uint24”},{“indexed”:false,“internalType”:“int24”,“name”:“tickSpacing”,“type”:“int24”},{“indexed”:false,“internalType”:“address”,“name”:“pool”,“type”:“address”}],“name”:“PoolCreated”,“type”:“event”},{“inputs”:[{“internalType”:“address”,“name”:“tokenA”,“type”:“address”},{“internalType”:“address”,“name”:“tokenB”,“type”:“address”},{“internalType”:“uint24”,“name”:“fee”,“type”:“uint24”}],“name”:“createPool”,“outputs”:[{“internalType”:“address”,“name”:“pool”,“type”:“address”}],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“uint24”,“name”:“fee”,“type”:“uint24”},{“internalType”:“int24”,“name”:“tickSpacing”,“type”:“int24”}],“name”:“enableFeeAmount”,“outputs”:[],“stateMutability”:“nonpayable”,“type”:“function”},{“inputs”:[{“internalType”:“uint24”,“name”:"",“type”:“uint24”}],“name”:“feeAmountTickSpacing”,“outputs”:[{“internalType”:“int24”,“name”:"",“type”:“int24”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:"",“type”:“address”},{“internalType”:“address”,“name”:"",“type”:“address”},{“internalType”:“uint24”,“name”:"",“type”:“uint24”}],“name”:“getPool”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“owner”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[],“name”:“parameters”,“outputs”:[{“internalType”:“address”,“name”:“factory”,“type”:“address”},{“internalType”:“address”,“name”:“token0”,“type”:“address”},{“internalType”:“address”,“name”:“token1”,“type”:“address”},{“internalType”:“uint24”,“name”:“fee”,“type”:“uint24”},{“internalType”:“int24”,“name”:“tickSpacing”,“type”:“int24”}],“stateMutability”:“view”,“type”:“function”},{“inputs”:[{“internalType”:“address”,“name”:"_owner",“type”:“address”}],“name”:“setOwner”,“outputs”:[],“stateMutability”:“nonpayable”,“type”:“function”}]’

var contractV3FactoryAddress = “0x1F98431c8aD98523631AE4a59f267346ea31F984” var contractV3SwapRouterV2Address = “0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45”

function toAmount(s, decimals) { return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString()) }

function toInnerAmount(n, decimals) { return (BigDecimal(n) * BigDecimal(Math.pow(10, decimals))).toFixed(0) }

function main (() { // Registered ABI for the Uniswap factory contractexchange.IO("abi", contractV3FactoryAddress, abiFactory)

// 注册Uniswap路由合约的ABI
exchange.IO("abi", contractV3SwapRouterV2Address, abiRoute)

// 获取交易对的池地址
var tokenIn = {name : "1INCH", address: "0x111111111117dC0aa78b770fA6A738034120C302", decimals: exchange.IO("api", "0x111111111117dC0aa78b770fA6A738034120C302", "decimals")}
var tokenOut = {name : "WETH", address: "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", decimals: exchange.IO("api", "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", "decimals")}
var poolAddress = exchange.IO("api", contractV3FactoryAddress, "getPool", tokenIn.address, tokenOut.address, 10000)

// 注册池合约ABI
exchange.IO("abi", poolAddress, abiPool)

var slot0 = exchange.IO("api", poolAddress, "slot0")
Log("slot0:", slot0)

}


获取到兑换池的价格信息，打印出代码中```slot0```变量：

```javascript
{
    "feeProtocol":0,
    "unlocked":true,
    "sqrtPriceX96":"1128983883551457130720648561",
    "tick":"-85025",
    "observationIndex":5,
    "observationCardinality":6,
    "observationCardinalityNext":6
}

The main price information data is recorded onsqrtPriceX96The field, which needs to be calculated together with the token accuracy data of the swap combination to calculate the current price of the swap pool, is based onUniswapThe documentation describes how we implemented a function to compute:

function computePoolPrice(decimals0, decimals1, sqrtPriceX96) {
    // sqrtPriceX96 = sqrt(price) * 2^96
    [decimals0, decimals1, sqrtPriceX96] = [decimals0, decimals1, sqrtPriceX96].map(BigInt);
    const TWO = BigInt(2);
    const TEN = BigInt(10);
    const SIX_TENTH = BigInt(1000000);
    const Q192 = (TWO ** BigInt(96)) ** TWO;
    return (
        Number((sqrtPriceX96 ** TWO * TEN ** decimals0 * SIX_TENTH) / (Q192 * TEN ** decimals1)) /
        Number(SIX_TENTH)
    );
}

Use this function to calculate the token combination as1INCH/WETHThe exchange rate is 10000 for the current price of the pool.

function computePoolPrice(decimals0, decimals1, sqrtPriceX96) {
    // sqrtPriceX96 = sqrt(price) * 2^96
    [decimals0, decimals1, sqrtPriceX96] = [decimals0, decimals1, sqrtPriceX96].map(BigInt);
    const TWO = BigInt(2);
    const TEN = BigInt(10);
    const SIX_TENTH = BigInt(1000000);
    const Q192 = (TWO ** BigInt(96)) ** TWO;
    return (
        Number((sqrtPriceX96 ** TWO * TEN ** decimals0 * SIX_TENTH) / (Q192 * TEN ** decimals1)) /
        Number(SIX_TENTH)
    );
}

function main() {
    var tokenIn = {name : "1INCH", address: "0x111111111117dC0aa78b770fA6A738034120C302", decimals: exchange.IO("api", "0x111111111117dC0aa78b770fA6A738034120C302", "decimals")}
    var tokenOut = {name : "WETH", address: "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", decimals: exchange.IO("api", "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", "decimals")}

    // 获取的slot0变量中"sqrtPriceX96":"1128983883551457130720648561",
    var price = computePoolPrice(tokenIn.decimals, tokenOut.decimals, "1128983883551457130720648561")
    Log("price:", price)
}

Printed variablespriceDisplayed:price: 0.000203(One 1 INCH is converted to 0.000203 WETH).

Uniswap V3 exchange library

The inventor of the quantitative trading platform has unveiled a packagedUniswapTemplateThis template has been implemented with functions such as exchange, get price, query wallet balance, no need to rewrite the code based on the above explanation, you can read the source code of this template to learn more in depth, develop applications in the direction of Web3. There are many design details worth learning about in the template library:

Automatically get the token information Take one of the code descriptions, and when the parameters of the templateAutoFetchTokensWhen set to true, the template program automatically accesseshttps://tokens.coingecko.com/uniswap/all.jsonLinking, retrieving and automatically processing information about all tokens. This is done without manually adding a token in the policy code (otherwise it will need to be used).addToken(name, address)Adding a token)

     if (AutoFetchTokens) {
          let res = JSON.parse(HttpQuery("https://tokens.coingecko.com/uniswap/all.json"))
          Log("fetch", res.tokens.length, "tokens from", res.name)
          res.tokens.forEach(function(token) {
              if (token.chainId == chainId && token.symbol != "WETH") {
                  self.tokenInfo[token.symbol] = {
                      name: token.symbol,
                      decimals: token.decimals,
                      address: token.address
                  }
              }
          })
      }

Adapt to different contract addresses depending on chain settings The template is setChainTypeParameters that support switching multiple chains:

  'https://rpc.ankr.com/eth',
  'https://arb1.arbitrum.io/rpc',
  'https://mainnet.optimism.io/',
  'https://rpc.ankr.com/avalanche',
  'https://polygon-rpc.com',
  'https://rpc.ankr.com/celo',

This is the code for the selection:

      if (typeof(ChainType) === 'number') {
          let chainRpc = [
              '',
              'https://rpc.ankr.com/eth',
              'https://arb1.arbitrum.io/rpc',
              'https://mainnet.optimism.io/',
              'https://rpc.ankr.com/avalanche',
              'https://polygon-rpc.com',
              'https://rpc.ankr.com/celo',
              //'https://mainnet.aurora.dev',
              //'https://bsc-dataseed.binance.org',
              //'https://exchainrpc.okex.org'
          ][ChainType]
          if (chainRpc && chainRpc.length > 0) {
              e.IO("base", chainRpc)
              Log("change base rpc to", chainRpc)
          }
      }

RPC method for calling Ethereumeth_chainIdCurrently searchingchainIdAnd based onchainIdI've been trying to find a way to match WETH's address.UniswapA series of contract addresses.USDTA smart contract may have different contract addresses on different chains.

This is the code for the selection:

      // https://docs.uniswap.org/contracts/v3/reference/deployments
      let WETHAddress = {
          1: "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", // Ethereum
          3: "0xc778417E063141139Fce010982780140Aa0cD5Ab", // Ropsten
          4: "0xc778417E063141139Fce010982780140Aa0cD5Ab", // Rinkeby
          5: "0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6", // Goerli
          42: "0xd0A1E359811322d97991E03f863a0C30C2cF029C", // Kovan
          10: "0x4200000000000000000000000000000000000006", // Optimism
          69: "0x4200000000000000000000000000000000000006", // Optimistic Kovan
          42161: "0x82aF49447D8a07e3bd95BD0d56f35241523fBab1", // Arbitrum One
          421611: "0xB47e6A5f8b33b3F17603C83a0535A9dcD7E32681", // Arbitrum Rinkeby
          137: "0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270", // Polygon
          80001: "0x9c3C9283D3e44854697Cd22D3Faa240Cfb032889", // Polygon Mumbai
      }

      let chainId = e.IO("api", "ETH", "eth_chainId")
      if (chainId) {
          chainId = Number(chainId)
          Log("chainId: ", chainId)
          let addr = WETHAddress[chainId]
          if (addr) {
              Log("Register WETH address", addr)
              self.addToken("ETH", addr)
          }
          if (chainId == 42220) {
              // Celo Address
              ContractV3Factory = '0xAfE208a311B21f13EF87E33A90049fC17A7acDEc'
              ContractV3SwapRouterV2 = '0x5615CDAb10dc425a742d643d949a7F474C01abc4'
              self.addToken('CELO', '0x471ece3750da237f93b8e339c536989b8978a438')
          } else if (chainId == 42161) {
              self.addToken('USDT', '0xfd086bc7cd5c481dcc9c85ebe478a1c0b69fcbb9')
          }
      } else {
          panic("get chain Id error")
      }

Using the Uniswap V3 exchange library

In this template$.testUniswap()A function is a function that tests a template function, and its code gives an example of how to call a template:

$.testUniswap = function() {
    let ex = $.NewUniswapV3()
    Log("walletAddress: ", ex.walletAddress)
    let tokenAddressMap = {
        "USDT": "0xdac17f958d2ee523a2206206994597c13d831ec7",
        "1INCH": "0x111111111117dC0aa78b770fA6A738034120C302",
        "USDC": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
        "DAI": "0x6b175474e89094c44da98b954eedeac495271d0f",
    }
    for (let name in tokenAddressMap) {
        ex.addToken(name, tokenAddressMap[name])
    }

    Log(ex.getPrice('ETH_USDT'))
    Log(ex.getPrice('1INCH_USDT'))

    // swap 0.01 ETH to USDT
    Log(ex.swapToken('ETH', 0.01, 'USDT'))
    let usdtBalance = ex.balanceOf('USDT')
    Log("balance of USDT", usdtBalance)

    // swap USDT to DAI then DAI to ETH
    Log(ex.swapToken('USDT', usdtBalance, 'DAI,ETH'))

    Log("balance of ETH", ex.getETHBalance())

    // Log(ex.sendETH('0x11111', 0.02))
    
    // ...
}

When a policy refers to the "Uniswap V3 transaction library" (how to refer to the template library can be found in the FMZ platform documentation), the function that is wrapped in the template library can be called.

Creating a site calledexA variable that calls the "Uniswap V3 transaction library" template wrapped in an interface function$.NewUniswapV3()Create an object with a valueex。

let ex = $.NewUniswapV3()

UseexMember functions of objectsaddToken()Added ((register) token information.

  let tokenAddressMap = {
      "USDT": "0xdac17f958d2ee523a2206206994597c13d831ec7",
      "1INCH": "0x111111111117dC0aa78b770fA6A738034120C302",
      "USDC": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
      "DAI": "0x6b175474e89094c44da98b954eedeac495271d0f",
  }
  for (let name in tokenAddressMap) {
      ex.addToken(name, tokenAddressMap[name])
  }

If you want to get and print the price of a swap pool for a particular pair, you can useexMember functions of objectsgetPrice()It can be written like this:

  Log(ex.getPrice('ETH_USDT'))
  Log(ex.getPrice('1INCH_USDT'))

If you want to perform a conversion operation, you can useexMember functions of objectsswapToken(), perform the conversion:

  // swap 0.01 ETH to USDT
  Log(ex.swapToken('ETH', 0.01, 'USDT'))
  let usdtBalance = ex.balanceOf('USDT')
  Log("balance of USDT", usdtBalance)

  // swap USDT to DAI then DAI to ETH
  Log(ex.swapToken('USDT', usdtBalance, 'DAI,ETH'))

Seizure events

In this chapter, we will learn how to read events released by smart contracts using inventor quantified trading platforms, which are stored in the logs of the Ethereum virtual machine.

eth_getLogs

Query events for smart contract releases that require Ethereum's RPC methodeth_getLogsIn this case, we're going to use the same algorithm to get log data on the chain, which we explained in our previous lesson on how to call Ethereum RPC nodes. For example, we getWETHThe event of the contract can be coded using FMZ.Debugging toolsThe test is to configure the RPC node on the exchange object as an Ethereum network node, which is being calledeth_getLogsWe have three parameters in the method.fromBlock、toBlock、addressWe use the fromBlock and toBlock parameters to query data within a block:

function toAmount(s, decimals) {
    return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString())
}

function toInnerAmount(n, decimals) {
    return (BigDecimal(n) * BigDecimal(Math.pow(10, decimals))).toFixed(0)
}

function main() {
    // getBlockNumber
    var blockNumber = exchange.IO("api", "eth", "eth_blockNumber")
    Log("blockNumber:", blockNumber)

    // get logs
    var fromBlock = "0x" + (toAmount(blockNumber, 0) - 1).toString(16)
    var toBlock = "0x" + toAmount(blockNumber, 0).toString(16)
    var params = {
        "fromBlock" : fromBlock,
        "toBlock" : toBlock,
        "address" : "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"   // WETH合约的地址
    }
    var logs = exchange.IO("api", "eth", "eth_getLogs", params)

    // 由于数据量比较大，如果使用Log函数打印，数据会被截断。使用return将完整数据返回在页面「函数结果」编辑框中
    return logs   
}

The logs are available in a variety of formats, but we omitted some of them because of the large amount of data:

[{
	"data": "0x00000000000000000000000000000000000000000000000001c1a55000000000",
	"topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x0000000000000000000000006b75d8af000000e20b7a7ddf000ba900b4009a80", "0x000000000000000000000000bcb095c1f9c3dc02e834976706c87dee5d0f1fb6"],
	"transactionHash": "0x27f9bf5abe3148169b4b85a83e1de32bd50eb81ecc52e5af006157d93353e4c4",
	"transactionIndex": "0x0",
	"removed": false,
	"address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
	"blockHash": "0x847be24a7b159c292bda030a011dfec89487b70e71eed486969b032d6ef04bad",
	"blockNumber": "0x109b1cc",
	"logIndex": "0x0"
}, {
	"data": "0x00000000000000000000000000000000000000000000000008ea20cdea027c00",
	"logIndex": "0x5",
	"topics": ["0xe1fffcc4923d04b559f4d29a8bfc6cda04eb5b0d3c460751c2402c5c5cc9109c", "0x0000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d"],
	"address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
	"blockHash": "0x847be24a7b159c292bda030a011dfec89487b70e71eed486969b032d6ef04bad",
	"blockNumber": "0x109b1cc",
	"removed": false,
	"transactionHash": "0xace3afa02e8af5d1ef6fc1635fbdf7bee37624547937ea5272c23968dd034c09",
	"transactionIndex": "0x1"
},

...

{
	"blockNumber": "0x109b1cd",
	"address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
	"data": "0x00000000000000000000000000000000000000000000000002c053531ab8a000",
	"logIndex": "0xd3",
	"removed": false,
	"topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x0000000000000000000000001111111254eeb25477b68fb85ed929f73a960582", "0x000000000000000000000000252ba9b5916171dbdadd2cec7f91875a006955d0"],
	"transactionHash": "0x3012b82891f85b077cfe1c12cb9722b93c696ef2c37d67981ccddcc9c3396aca",
	"transactionIndex": "0x8d",
	"blockHash": "0xcd3d567c9bd02a4549b1de0dc638ab5523e847c3c156b096424f56c633000fd9"
}, {
	"topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x00000000000000000000000012b791bb27b3a4ee958b5a435fea7d49ec076e9c", "0x000000000000000000000000ef1c6e67703c7bd7107eed8303fbe6ec2554bf6b"],
	"transactionIndex": "0x91",
	"logIndex": "0xdb",
	"removed": false,
	"blockNumber": "0x109b1cd",
	"data": "0x0000000000000000000000000000000000000000000000000164f2434262e1cc",
	"transactionHash": "0x6aa8d80daf42f442591e7530e31323d05e1d6dd9f9f9b9c102e157d89810c048",
	"address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
	"blockHash": "0xcd3d567c9bd02a4549b1de0dc638ab5523e847c3c156b096424f56c633000fd9"
}, {
	"address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
	"blockHash": "0xcd3d567c9bd02a4549b1de0dc638ab5523e847c3c156b096424f56c633000fd9",
	"blockNumber": "0x109b1cd",
	"logIndex": "0xde",
	"removed": false,
	"topics": ["0x7fcf532c15f0a6db0bd6d0e038bea71d30d808c7d98cb3bf7268a95bf5081b65", "0x000000000000000000000000ef1c6e67703c7bd7107eed8303fbe6ec2554bf6b"],
	"data": "0x0000000000000000000000000000000000000000000000000164f2434262e1cc",
	"transactionHash": "0x6aa8d80daf42f442591e7530e31323d05e1d6dd9f9f9b9c102e157d89810c048",
	"transactionIndex": "0x91"
}]

You can see that there are all kinds of events in the log data, if we just care about the logs.TransferThe event needs to be able to capture all of this data.TransferThe incident was filtered out.

Search logs

The Ethereum log is divided into two parts, one, and one topic.topics; 2, datadata。

SubjecttopicsI mean,eth_getLogsThe results of the code run of the chapter tests are an example.topicsThe data in the fields are:
```
"topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x00000000000000000000000012b791bb27b3a4ee958b5a435fea7d49ec076e9c", "0x000000000000000000000000ef1c6e67703c7bd7107eed8303fbe6ec2554bf6b"],  
```
This onetopicsThe value of the (subject) field is an array structure used to describe an event. It specifies that the length of the ((array)) cannot exceed 4, and that the first element is the signature hash value of the event. Inventors quantify trading platforms that we use.EncodeThe function can calculate the hash value of this signature using the following code:
```
function main() {
    var eventFunction = "Transfer(address,address,uint256)"
    var eventHash = Encode("keccak256", "string", "hex", eventFunction)
    Log("eventHash:", "0x" + eventHash)
    // eventHash: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
}
```
CalculatingTransfer(address,address,uint256)What?keccak256The hash value (hex encoding) is0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef。

topicsThe value of the field is an arithmetic structure, with the second and third elements:
- Sending addressfrom
- Receiving addressto
The datadata

dataThe data in the fields are:
```
"data": "0x0000000000000000000000000000000000000000000000000164f2434262e1cc",
```
Some of the parameters in the event (parameters in the Solidity code of the smart contract that do not have an indexed declaration) are stored indataI'm not sure what you mean.

Analyze this data.0x0000000000000000000000000000000000000000000000000164f2434262e1cc
```
function toAmount(s, decimals) {
    return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString())
}

function main() {
    var value = "0x0000000000000000000000000000000000000000000000000164f2434262e1cc"
    Log(toAmount(value, 0) / 1e18)  // 0.10047146239950075
}
```
The data is: 0.10047146239950075, which is 0.10047146239950075.dataThe data corresponds to the amount of money transferred.

We're ready to start searching the logs:

function toAmount(s, decimals) {
    return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString())
}

function toInnerAmount(n, decimals) {
    return (BigDecimal(n) * BigDecimal(Math.pow(10, decimals))).toFixed(0)
}

function main() {
    // getBlockNumber
    var blockNumber = exchange.IO("api", "eth", "eth_blockNumber")
    Log("blockNumber:", blockNumber)

    // get logs
    var fromBlock = "0x" + (toAmount(blockNumber, 0) - 1).toString(16)
    var toBlock = "0x" + toAmount(blockNumber, 0).toString(16)
    var params = {
        "fromBlock" : fromBlock,
        "toBlock" : toBlock,
        "address" : "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"
    }
    var logs = exchange.IO("api", "eth", "eth_getLogs", params)

    // 遍历logs
    var eventFunction = "Transfer(address,address,uint256)"
    var eventHash = "0x" + Encode("keccak256", "string", "hex", eventFunction)
    Log("eventHash:", eventHash)

    var counter = 0
    for (var i = logs.length - 1; i >= 0 && counter < 10; i--) {
        if (logs[i].topics[0] == eventHash) {
            Log("Event Transfer, data:", toAmount(logs[i].data, 0) / 1e18, ", blockNumber:", toAmount(logs[i].blockNumber, 0), ", transactionHash:", logs[i].transactionHash,
              ", log:", logs[i])
            counter++
        }
    }
}

In thehttps://etherscan.io/This is a question:

Results of the test code running in FMZ Debug Tool:

You can also analyze the data according to the needs of the search.from，toThe data of the fields, for example:

function main() {
    var from = "0x00000000000000000000000012b791bb27b3a4ee958b5a435fea7d49ec076e9c"
    var address = "0x" + exchange.IO("encodePacked", "address", from)
    Log("address:", address)
}

The results:

address: 0x12b791bb27b3a4ee958b5a435fea7d49ec076e9c

Incident of the wiretapping contract

Due toDebugging toolsThe code can only be tested for a short time, and the content can only be exported after the code has been executed, and cannot be displayed in real time, the output log.

Here we use the Ethereum network, and we listen.USDTThis currency contractTransfer(address,address,uint256)The event, based on what we learned in the previous lesson, we designed to write an example of continuous listening to a smart contract event:

function toAmount(s, decimals) {
    return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString())
}

function toInnerAmount(n, decimals) {
    return (BigDecimal(n) * BigDecimal(Math.pow(10, decimals))).toFixed(0)
}

function addEventListener(contractAddress, event, callBack) {
    var self = {}
    self.eventHash = "0x" + Encode("keccak256", "string", "hex", event)
    self.contractAddress = contractAddress
    self.latestBlockNumber = 0
    self.fromBlockNumber = 0
    self.firstBlockNumber = 0
    /* TODO: test
    self.isFirst = true 
    */ 

    self.getBlockNumber = function() {
        var maxTry = 10
        for (var i = 0; i < maxTry; i++) {
            var ret = exchange.IO("api", "eth", "eth_blockNumber")
            if (ret) {
                return toAmount(ret, 0)
            }
            Sleep(5000)
        }
        throw "getBlockNumber failed"
    }

    self.run = function() {
        var currBlockNumber = self.getBlockNumber()
        var fromBlock = "0x" + self.fromBlockNumber.toString(16)
        var toBlock = "0x" + currBlockNumber.toString(16)
        var params = {

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