web3agent-aof/dist/dex/addLiquidity.js

AI Framework for Onchain Operations and DeFi Interactions

import { ethers } from 'ethers';
// Uniswap V2 Router ABI (minimal)
const UNISWAP_V2_ROUTER_ABI = [
    'function addLiquidity(address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline) external returns (uint amountA, uint amountB, uint liquidity)',
    'function addLiquidityETH(address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline) external payable returns (uint amountToken, uint amountETH, uint liquidity)'
];
export const addLiquidity = async (params, wallet) => {
    const { tokenA, tokenB, amountA, amountB, slippage, routerAddress } = params;
    const router = new ethers.Contract(routerAddress, UNISWAP_V2_ROUTER_ABI, wallet);
    const to = await wallet.getAddress();
    const deadline = Math.floor(Date.now() / 1000) + 60 * 20; // 20 minutes from now
    // Calculate minimum amounts based on slippage
    const amountABigInt = ethers.parseUnits(amountA, 18);
    const amountBBigInt = ethers.parseUnits(amountB, 18);
    const slippageFactor = BigInt(Math.floor((1 - slippage) * 1000));
    const amountAMin = (amountABigInt * slippageFactor) / 1000n;
    const amountBMin = (amountBBigInt * slippageFactor) / 1000n;
    try {
        let tx;
        if (tokenA === ethers.ZeroAddress || tokenB === ethers.ZeroAddress) {
            // Add liquidity ETH
            const token = tokenA === ethers.ZeroAddress ? tokenB : tokenA;
            const tokenAmount = tokenA === ethers.ZeroAddress ? amountB : amountA;
            const ethAmount = tokenA === ethers.ZeroAddress ? amountA : amountB;
            tx = await router.addLiquidityETH(token, tokenAmount, 0, // amountTokenMin
            0, // amountETHMin
            to, deadline, { value: ethAmount });
        }
        else {
            // Add liquidity tokens
            tx = await router.addLiquidity(tokenA, tokenB, amountA, amountB, amountAMin, amountBMin, to, deadline);
        }
        const receipt = await tx.wait();
        return receipt;
    }
    catch (error) {
        throw new Error(`Add liquidity failed: ${error.message}`);
    }
};
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