1.1.0 • Published 4 years ago
uniswap-v2-helper v1.1.0
Uniswap V2 Helper
Uniswap trades in a single function call. Currently only supports direct erc20 token pairs with a decimals getter. Single outside dependency on ethers.js.
Usage
import { getSwapParams, swapTokens } from 'uniswap-v2-helper'
import { ethers } from 'ethers'
const privateKey = '0x...'
const provider = ethers.getDefaultProvider() // use default provider or any other ethers provider
const signer = new ethers.Wallet(privateKey, provider)
// get swap params
const {
amountIn,
amountOut,
expectedAmount,
expectedSlippage,
path,
deadline,
} = await getSwapParams(
'0x...', // input token address
'0x...', // output token address
'1.0', // ammount to buy or sell with decimals
true, // true if amount is input token, false if amount is output token
{
maxSlippage: 100, // optional frontrunning tolerance (default to 100 basis points)
maxDelay: 60 * 2, // optional max settlement time in seconds (default to 2 minutes)
ethersProvider: provider, // optional ethers provider (defaults to default mainnet ethers provider)
},
)
// perform swap with exact output
const receipt = await swapTokens(
signer, // ethers signer
'0x...', // input token address
'0x...', // output token address
'1.0', // ammount to buy or sell with decimals
true, // true if amount is input token, false if amount is output token
{
recipient: '0x...', // optional recipient address (default to signer)
maxSlippage: 100, // optional frontrunning tolerance (default to 100 basis points)
maxDelay: 60 * 2, // optional max settlement time in seconds (default to 2 minutes)
},
)
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