@tevm/ethers NPM

@tevm/ethers

A ethers.js utilities for Tevm

Try cloning our minimal bun example on github

Don't worry if you aren't familiar with bun. It works with NODE/npm pnpm and yarn too

High level overview

Previously the best way to get typesafe contracts with ethers was typechain typechain improved the dev experience of using contracts via creating typesafe contracts via codegen. Tevm builds on this idea by providing the same benifit purely at runtime without any build or codegen steps.

@tevm/ethers exports a single function createEthersContract
@tevm/ethers only supports ethers v6 at this time

Installation

To use @tevm/ethers simply set up tevm as normal and add the special @tevm/ethers package

npm install @tevm/ethers ethers@6

API Reference

createEthersContract function

Type

function createEthersContract<TAddresses extends Record<number, Address>, TAbi extends Abi>(
    contract: Pick<TevmContract<any, TAddresses, TAbi, any>, 'abi' | 'addresses'>,
    options: CreateEthersContractOptions<keyof TAddresses & number>
): TypesafeEthersContract<TAbi>

Description Creates a typesafe ethers contract from an tevm contract. This function provides typesafe contracts for Ethereum development with Ethers.js and Tevm.

Params

contract: This parameter should be an Tevm contract. It should include the 'abi' and 'addresses' properties.
options: This parameter should be an object of type CreateEthersContractOptions. It should include either a chainId or an address, along with the runner, which should be an Ethers.js provider or signer.

Returns The function returns a TypesafeEthersContract. This contract is a typed version of the ethers.js contract instance, which provides type safety and autocompletion for contract methods.

Example

// import a contract with tevm
import {ERC20} from '@openzeppelin/contracts/token/ERC20/ERC20.sol'
import {providers} from 'ethers'
// create a provider or signer for the ethers contract
const provider = new providers.JsonRpcProvider('http://localhost:8545')
// create a typesafe contract
const contract = createEthersContract(myContract, {chainId: 1, runner: provider})
// enjoy typesafety and autocompletion in your ethers contract
const balance = c.balanceOf('0x32307adfFE088e383AFAa721b06436aDaBA47DBE'),

CreateEthersContractOptions Type

Type

type CreateEthersContractOptions<TChainIds extends number> =
  | {
      chainId: TChainIds;
      runner: ContractRunner;
  }
  | {
      address: Address;
      runner: ContractRunner;
  }

Description An options object type used by createEthersContract function. It can either provide a chainId if Tevm config has addresses for contracts configured for that chain or provide the address prop to specify the address directly. Both options require a runner property which is an Ethers.js provider or signer.

Params

chainId or address: You should provide either the chainId or the address of the contract. If you use the chainId option, Tevm should have the addresses for contracts configured for that chain. If you use the address option, specify the address directly.
runner: This is an Ethers.js provider or signer.

Example

const optionsWithChainId = { chainId: 1, runner: provider }; // Using chainId
const optionsWithAddress = { address: "0x1234...abcd", runner: provider }; // Using address