UniswapV3获得无人认领的费用

Question

如何检索无人认领的费用(见屏幕快照的绿色矩形)，调用UniswapV3合同或UniswapSDKv3？

我想显示投资的总流动资金(每对)，包括应计费用。

Answer 1

从Uniswap V3头寸获得流动性和应计无人认领费用的解决方案如下：

const { Pool } = require("@uniswap/v3-sdk");
const { Position } = require("@uniswap/v3-sdk");
const { ethers } = require("ethers");
const { BigNumber } = require("@ethersproject/bignumber");

const MAX_UINT128 = BigNumber.from(2).pow(128).sub(1);

/* GET POSITION LIQUIDITY */
const USDEURPool = new Pool(tokenUSD, 
                            tokenEUR, 
                            Number.parseInt(immutables.fee), 
                            state.sqrtPriceX96.toString(), 
                            state.liquidity.toString(), 
                            Number.parseInt(state.tick) );
const positionInfo = await positionmanagerContract.positions(1058);
const position = new Position({pool: USDEURPool, liquidity: positionInfo.liquidity.toString(), tickLower: positionInfo.tickLower, tickUpper: position.tickUpper});
console.log("amount0:", position.amount0.toSignificant(4));
console.log("amount1:", position.amount1.toSignificant(4));
// get more details such as currency infos from position, such as token symbol, etc.

/* GET ACCRUED UNCLAIMDED FEES */
// callStatic simulates a call without state changes
var results = await positionmanagerContract.callStatic.collect({tokenId: 1058,
                                                                recipient: owner, 
                                                                amount0Max: MAX_UINT128, 
                                                                amount1Max: MAX_UINT128}, {from: owner});
console.log("Fee0:",parseFloat(results.amount0)/100);
console.log("Fee1:",parseFloat(results.amount1)/100);