各位大佬，有在Uniswap v4上添加流动性的示例代码吗，我觉得官方的test里面封装的东西太多了 | 登链社区

5 各位大佬，有在Uniswap v4上添加流动性的示例代码吗，我觉得官方的test里面封装的东西太多了

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分类：Uniswap

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七文 1天前

import { Contract, ethers } from 'ethers'
import { 
  MintOptions,
  Pool,
  Position,
  nearestUsableTick,
  TickMath,
  maxLiquidityForAmounts
} from '@uniswap/v3-sdk'

// 添加流动性的主要函数
async function addLiquidity({
  token0Amount,
  token1Amount,
  minTick,
  maxTick,
  poolAddress,
  positionManagerAddress
}: {
  token0Amount: string,
  token1Amount: string,
  minTick: number,
  maxTick: number,
  poolAddress: string,
  positionManagerAddress: string
}) {
  // 1. 获取当前池子信息
  const pool = await getPoolInfo(poolAddress)
  
  // 2. 计算流动性数量
  const liquidity = maxLiquidityForAmounts(
    TickMath.getSqrtRatioAtTick(pool.tick),
    TickMath.getSqrtRatioAtTick(minTick),
    TickMath.getSqrtRatioAtTick(maxTick),
    ethers.utils.parseEther(token0Amount),
    ethers.utils.parseEther(token1Amount),
    true
  )

// 3. 准备添加流动性的参数
  const params = {
    token0: pool.token0,
    token1: pool.token1,
    fee: pool.fee,
    tickLower: nearestUsableTick(minTick, pool.tickSpacing),
    tickUpper: nearestUsableTick(maxTick, pool.tickSpacing),
    amount0Desired: ethers.utils.parseEther(token0Amount),
    amount1Desired: ethers.utils.parseEther(token1Amount),
    amount0Min: 0, // 可以根据需要设置滑点保护
    amount1Min: 0, // 可以根据需要设置滑点保护
    recipient: await getWalletAddress(),
    deadline: Math.floor(Date.now() / 1000) + 60 * 20 // 20分钟后过期
  }

// 4. 调用合约添加流动性
  const positionManager = new Contract(
    positionManagerAddress,
    UniswapV3NonfungiblePositionManagerABI,
    provider
  )

const tx = await positionManager.mint(params)
  await tx.wait()
  
  return tx
}

// 获取池子信息的辅助函数
async function getPoolInfo(poolAddress: string) {
  const poolContract = new Contract(
    poolAddress,
    IUniswapV3PoolABI,
    provider
  )
  
  const [token0, token1, fee, tickSpacing, slot0, liquidity] = await Promise.all([
    poolContract.token0(),
    poolContract.token1(),
    poolContract.fee(),
    poolContract.tickSpacing(),
    poolContract.slot0(),
    poolContract.liquidity()
  ])

return {
    token0,
    token1,
    fee,
    tickSpacing,
    tick: slot0.tick,
    sqrtPriceX96: slot0.sqrtPriceX96,
    liquidity
  }
}