@kodex-data/permit

@kodex-data/permit is a helper package that provides ERC20 permit functionality. This package is a fork of the Uniswap protocol's package, and it provides a simple way to generate permit signatures for ERC20 tokens. By using this package, you can easily enable users to approve token transfers without the need for multiple transactions.

Installation

You can install @kodex-data/permit using yarn or npm. Here's how you can do it:

yarn add @kodex-data/permit
# or
npm install @kodex-data/permit

Usage

Once you have installed the package, you can import the getPermitSignature function from the package to generate a permit signature. Here's how you can use it:

import { getPermitSignature } from '@kodex-data/permit'

// generate permit signature
const permitSignature = await getPermitSignature(
  provider, // the Ethereum provider
  tokenAddress, // the address of the ERC20 token
  ownerAddress, // the address of the token owner
  spenderAddress, // the address of the token spender
  value, // the amount of tokens that can be spent
  deadline, // the deadline for the permit in seconds since the Unix epoch
  nonce // a unique value that prevents replay attacks
)

This function returns a Promise that resolves to the permit signature as a string.