lkt/spacefiremovelliquidity.mjs

import Web3, { eth } from "web3";
import { BigNumber } from "bignumber.js";
import { Wallet, Provider } from "zksync-web3";
import { ethers } from "ethers";
import spacefiRouterAbi from "./spacefiRouterAbi.json" assert { type: "json" };
import spacefiFactoryAbi from "./spacefiFactoryAbi.json" assert { type: "json" };
import spacefiPairAbi from "./spacefiPairAbi.json" assert { type: "json" };

const rpc = "https://zksync2-testnet.zksync.dev/";
const privateKey = "0xd768b0b3f8dedcb465ad680268453391f7da6ec4e1942a13fdfcdea8773aab3e";
const spaceFiRouterAddress = "0x6eeF3310E09DF3aa819Cc2aa364D4f3Ad2E6fFe3";
const usdcAddress = "0x0faF6df7054946141266420b43783387A78d82A9";

const provider = new Provider(rpc);
const wallet = new Wallet(privateKey).connect(provider);
const web3 = new Web3(new Web3.providers.HttpProvider(rpc));

const value = ethers.utils.parseEther("0.001");
const spacefiRouter = new web3.eth.Contract(spacefiRouterAbi, spaceFiRouterAddress);
const wethAddress = await spacefiRouter.methods.WETH().call();
console.log(`wethAddress: ${wethAddress}`);
const d = ethers.BigNumber.from(usdcAddress).gt(ethers.BigNumber.from(wethAddress));
const inputToken = "eth";
const inputEth = inputToken === "eth";
console.log(`d: ${d}`);
const factoryAddress = await spacefiRouter.methods.factory().call();
console.log(`factoryAddress: ${factoryAddress}`);
const factory = new web3.eth.Contract(spacefiFactoryAbi, factoryAddress);
const pairAddress = await factory.methods.getPair(wethAddress, usdcAddress).call();
console.log(`pairAddress: ${pairAddress}`);
const pair = new web3.eth.Contract(spacefiPairAbi, pairAddress);
const reserves = await pair.methods.getReserves().call();
const amountOut = await spacefiRouter.methods
    .quote(value.toHexString(), d ^ inputEth ? reserves[1] : reserves[0], d ^ inputEth ? reserves[0] : reserves[1])
    .call();
console.log(`out: ${ethers.utils.formatUnits(amountOut, 6)}`);

const liquidity = await pair.methods.balanceOf(wallet.address).call();
console.log(`liquidity: ${liquidity}`);

const removeLiquidity = await spacefiRouter.methods.removeLiquidityETH(
    usdcAddress,
    liquidity,
    0,
    0,
    wallet.address,
    Math.floor(new Date().getTime() / 1000 + 60 * 30)
);
const gasLimit = await removeLiquidity.estimateGas({ from: wallet.address });
console.log(`gasLimit: ${gasLimit}`);
const tx = await wallet.sendTransaction({
    to: spaceFiRouterAddress,
    data: removeLiquidity.encodeABI(),
    gasLimit,
});
console.log(tx);