BlockmanCodes/.env

## .env
INFURA_URL_TESTNET=
WALLET_ADDRESS=
WALLET_SECRET=

## abi.json
[
  {
    "inputs": [],
    "stateMutability": "nonpayable",
    "type": "constructor"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "owner",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "indexed": false,
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Approval",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "from",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "address",
        "name": "to",
        "type": "address"
      },
      {
        "indexed": false,
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Transfer",
    "type": "event"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "owner",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      }
    ],
    "name": "allowance",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "approve",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "account",
        "type": "address"
      }
    ],
    "name": "balanceOf",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "decimals",
    "outputs": [
      {
        "internalType": "uint8",
        "name": "",
        "type": "uint8"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "subtractedValue",
        "type": "uint256"
      }
    ],
    "name": "decreaseAllowance",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "addedValue",
        "type": "uint256"
      }
    ],
    "name": "increaseAllowance",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "name",
    "outputs": [
      {
        "internalType": "string",
        "name": "",
        "type": "string"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "symbol",
    "outputs": [
      {
        "internalType": "string",
        "name": "",
        "type": "string"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "totalSupply",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "to",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "transfer",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "from",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "to",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "transferFrom",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  }
]

## helpers.js
exports.getPoolImmutables = async (poolContract) => {
  const [token0, token1, fee] = await Promise.all([
    poolContract.token0(),
    poolContract.token1(),
    poolContract.fee()
  ])

  const immutables = {
    token0: token0,
    token1: token1,
    fee: fee
  }
  return immutables
}

exports.getPoolState = async (poolContract) => {
  const slot = poolContract.slot0()

  const state = {
    sqrtPriceX96: slot[0]
  }

  return state
}

## package.json
{
  "name": "uniswaptrader",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@uniswap/sdk-core": "^3.0.1",
    "@uniswap/v3-sdk": "^3.8.2",
    "dotenv": "^16.0.0",
    "ethers": "^5.6.4"
  }
}

## uniswapTrader.js
const { ethers } = require('ethers')
const { abi: IUniswapV3PoolABI } = require('@uniswap/v3-core/artifacts/contracts/interfaces/IUniswapV3Pool.sol/IUniswapV3Pool.json')
const { abi: SwapRouterABI} = require('@uniswap/v3-periphery/artifacts/contracts/interfaces/ISwapRouter.sol/ISwapRouter.json')
const { getPoolImmutables, getPoolState } = require('./helpers')
const ERC20ABI = require('./abi.json')

require('dotenv').config()
const INFURA_URL_TESTNET = process.env.INFURA_URL_TESTNET
const WALLET_ADDRESS = process.env.WALLET_ADDRESS
const WALLET_SECRET = process.env.WALLET_SECRET

const provider = new ethers.providers.JsonRpcProvider(INFURA_URL_TESTNET) // Ropsten
const poolAddress = "0x4D7C363DED4B3b4e1F954494d2Bc3955e49699cC" // UNI/WETH
const swapRouterAddress = '0xE592427A0AEce92De3Edee1F18E0157C05861564'

const name0 = 'Wrapped Ether'
const symbol0 = 'WETH'
const decimals0 = 18
const address0 = '0xc778417e063141139fce010982780140aa0cd5ab'

const name1 = 'Uniswap Token'
const symbol1 = 'UNI'
const decimals1 = 18
const address1 = '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984'

async function main() {
  const poolContract = new ethers.Contract(
    poolAddress,
    IUniswapV3PoolABI,
    provider
  )

  const immutables = await getPoolImmutables(poolContract)
  const state = await getPoolState(poolContract)

  const wallet = new ethers.Wallet(WALLET_SECRET)
  const connectedWallet = wallet.connect(provider)

  const swapRouterContract = new ethers.Contract(
    swapRouterAddress,
    SwapRouterABI,
    provider
  )

  const inputAmount = 0.001
  // .001 => 1 000 000 000 000 000
  const amountIn = ethers.utils.parseUnits(
    inputAmount.toString(),
    decimals0
  )

  const approvalAmount = (amountIn * 100000).toString()
  const tokenContract0 = new ethers.Contract(
    address0,
    ERC20ABI,
    provider
  )
  const approvalResponse = await tokenContract0.connect(connectedWallet).approve(
    swapRouterAddress,
    approvalAmount
  )

  const params = {
    tokenIn: immutables.token1,
    tokenOut: immutables.token0,
    fee: immutables.fee,
    recipient: WALLET_ADDRESS,
    deadline: Math.floor(Date.now() / 1000) + (60 * 10),
    amountIn: amountIn,
    amountOutMinimum: 0,
    sqrtPriceLimitX96: 0,
  }

  const transaction = swapRouterContract.connect(connectedWallet).exactInputSingle(
    params,
    {
      gasLimit: ethers.utils.hexlify(1000000)
    }
  ).then(transaction => {
    console.log(transaction)
  })
}

main()
	[
	{
	"inputs": [],
	"stateMutability": "nonpayable",
	"type": "constructor"
	},
	{
	"anonymous": false,
	"inputs": [
	{
	"indexed": true,
	"internalType": "address",
	"name": "owner",
	"type": "address"
	},
	{
	"indexed": true,
	"internalType": "address",
	"name": "spender",
	"type": "address"
	},
	{
	"indexed": false,
	"internalType": "uint256",
	"name": "value",
	"type": "uint256"
	}
	],
	"name": "Approval",
	"type": "event"
	},
	{
	"anonymous": false,
	"inputs": [
	{
	"indexed": true,
	"internalType": "address",
	"name": "from",
	"type": "address"
	},
	{
	"indexed": true,
	"internalType": "address",
	"name": "to",
	"type": "address"
	},
	{
	"indexed": false,
	"internalType": "uint256",
	"name": "value",
	"type": "uint256"
	}
	],
	"name": "Transfer",
	"type": "event"
	},
	{
	"inputs": [
	{
	"internalType": "address",
	"name": "owner",
	"type": "address"
	},
	{
	"internalType": "address",
	"name": "spender",
	"type": "address"
	}
	],
	"name": "allowance",
	"outputs": [
	{
	"internalType": "uint256",
	"name": "",
	"type": "uint256"
	}
	],
	"stateMutability": "view",
	"type": "function"
	},
	{
	"inputs": [
	{
	"internalType": "address",
	"name": "spender",
	"type": "address"
	},
	{
	"internalType": "uint256",
	"name": "amount",
	"type": "uint256"
	}
	],
	"name": "approve",
	"outputs": [
	{
	"internalType": "bool",
	"name": "",
	"type": "bool"
	}
	],
	"stateMutability": "nonpayable",
	"type": "function"
	},
	{
	"inputs": [
	{
	"internalType": "address",
	"name": "account",
	"type": "address"
	}
	],
	"name": "balanceOf",
	"outputs": [
	{
	"internalType": "uint256",
	"name": "",
	"type": "uint256"
	}
	],
	"stateMutability": "view",
	"type": "function"
	},
	{
	"inputs": [],
	"name": "decimals",
	"outputs": [
	{
	"internalType": "uint8",
	"name": "",
	"type": "uint8"
	}
	],
	"stateMutability": "view",
	"type": "function"
	},
	{
	"inputs": [
	{
	"internalType": "address",
	"name": "spender",
	"type": "address"
	},
	{
	"internalType": "uint256",
	"name": "subtractedValue",
	"type": "uint256"
	}
	],
	"name": "decreaseAllowance",
	"outputs": [
	{
	"internalType": "bool",
	"name": "",
	"type": "bool"
	}
	],
	"stateMutability": "nonpayable",
	"type": "function"
	},
	{
	"inputs": [
	{
	"internalType": "address",
	"name": "spender",
	"type": "address"
	},
	{
	"internalType": "uint256",
	"name": "addedValue",
	"type": "uint256"
	}
	],
	"name": "increaseAllowance",
	"outputs": [
	{
	"internalType": "bool",
	"name": "",
	"type": "bool"
	}
	],
	"stateMutability": "nonpayable",
	"type": "function"
	},
	{
	"inputs": [],
	"name": "name",
	"outputs": [
	{
	"internalType": "string",
	"name": "",
	"type": "string"
	}
	],
	"stateMutability": "view",
	"type": "function"
	},
	{
	"inputs": [],
	"name": "symbol",
	"outputs": [
	{
	"internalType": "string",
	"name": "",
	"type": "string"
	}
	],
	"stateMutability": "view",
	"type": "function"
	},
	{
	"inputs": [],
	"name": "totalSupply",
	"outputs": [
	{
	"internalType": "uint256",
	"name": "",
	"type": "uint256"
	}
	],
	"stateMutability": "view",
	"type": "function"
	},
	{
	"inputs": [
	{
	"internalType": "address",
	"name": "to",
	"type": "address"
	},
	{
	"internalType": "uint256",
	"name": "amount",
	"type": "uint256"
	}
	],
	"name": "transfer",
	"outputs": [
	{
	"internalType": "bool",
	"name": "",
	"type": "bool"
	}
	],
	"stateMutability": "nonpayable",
	"type": "function"
	},
	{
	"inputs": [
	{
	"internalType": "address",
	"name": "from",
	"type": "address"
	},
	{
	"internalType": "address",
	"name": "to",
	"type": "address"
	},
	{
	"internalType": "uint256",
	"name": "amount",
	"type": "uint256"
	}
	],
	"name": "transferFrom",
	"outputs": [
	{
	"internalType": "bool",
	"name": "",
	"type": "bool"
	}
	],
	"stateMutability": "nonpayable",
	"type": "function"
	}
	]
	exports.getPoolImmutables = async (poolContract) => {
	const [token0, token1, fee] = await Promise.all([
	poolContract.token0(),
	poolContract.token1(),
	poolContract.fee()
	])

	const immutables = {
	token0: token0,
	token1: token1,
	fee: fee
	}
	return immutables
	}

	exports.getPoolState = async (poolContract) => {
	const slot = poolContract.slot0()

	const state = {
	sqrtPriceX96: slot[0]
	}

	return state
	}
	{
	"name": "uniswaptrader",
	"version": "1.0.0",
	"description": "",
	"main": "index.js",
	"scripts": {
	"test": "echo \"Error: no test specified\" && exit 1"
	},
	"keywords": [],
	"author": "",
	"license": "ISC",
	"dependencies": {
	"@uniswap/sdk-core": "^3.0.1",
	"@uniswap/v3-sdk": "^3.8.2",
	"dotenv": "^16.0.0",
	"ethers": "^5.6.4"
	}
	}
	const { ethers } = require('ethers')
	const { abi: IUniswapV3PoolABI } = require('@uniswap/v3-core/artifacts/contracts/interfaces/IUniswapV3Pool.sol/IUniswapV3Pool.json')
	const { abi: SwapRouterABI} = require('@uniswap/v3-periphery/artifacts/contracts/interfaces/ISwapRouter.sol/ISwapRouter.json')
	const { getPoolImmutables, getPoolState } = require('./helpers')
	const ERC20ABI = require('./abi.json')

	require('dotenv').config()
	const INFURA_URL_TESTNET = process.env.INFURA_URL_TESTNET
	const WALLET_ADDRESS = process.env.WALLET_ADDRESS
	const WALLET_SECRET = process.env.WALLET_SECRET

	const provider = new ethers.providers.JsonRpcProvider(INFURA_URL_TESTNET) // Ropsten
	const poolAddress = "0x4D7C363DED4B3b4e1F954494d2Bc3955e49699cC" // UNI/WETH
	const swapRouterAddress = '0xE592427A0AEce92De3Edee1F18E0157C05861564'

	const name0 = 'Wrapped Ether'
	const symbol0 = 'WETH'
	const decimals0 = 18
	const address0 = '0xc778417e063141139fce010982780140aa0cd5ab'

	const name1 = 'Uniswap Token'
	const symbol1 = 'UNI'
	const decimals1 = 18
	const address1 = '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984'

	async function main() {
	const poolContract = new ethers.Contract(
	poolAddress,
	IUniswapV3PoolABI,
	provider
	)

	const immutables = await getPoolImmutables(poolContract)
	const state = await getPoolState(poolContract)

	const wallet = new ethers.Wallet(WALLET_SECRET)
	const connectedWallet = wallet.connect(provider)

	const swapRouterContract = new ethers.Contract(
	swapRouterAddress,
	SwapRouterABI,
	provider
	)

	const inputAmount = 0.001
	// .001 => 1 000 000 000 000 000
	const amountIn = ethers.utils.parseUnits(
	inputAmount.toString(),
	decimals0
	)

	const approvalAmount = (amountIn * 100000).toString()
	const tokenContract0 = new ethers.Contract(
	address0,
	ERC20ABI,
	provider
	)
	const approvalResponse = await tokenContract0.connect(connectedWallet).approve(
	swapRouterAddress,
	approvalAmount
	)

	const params = {
	tokenIn: immutables.token1,
	tokenOut: immutables.token0,
	fee: immutables.fee,
	recipient: WALLET_ADDRESS,
	deadline: Math.floor(Date.now() / 1000) + (60 * 10),
	amountIn: amountIn,
	amountOutMinimum: 0,
	sqrtPriceLimitX96: 0,
	}

	const transaction = swapRouterContract.connect(connectedWallet).exactInputSingle(
	params,
	{
	gasLimit: ethers.utils.hexlify(1000000)
	}
	).then(transaction => {
	console.log(transaction)
	})
	}

	main()