A library that enables next-generation UX and DX via putting an ethereum node in the browser and solidity in javascript

tevm-monorepo

Tevm tools include an Ethereum devnet that can run in the Browser and Node.js along with a solidity bundler that allows you to import solidity directly into TypeScript files. All built on top of the viem API.

1// import solidity directly into typescript
2import { ERC20 } from '@openzeppelin/contracts/token/ERC20/ERC20.sol'
3import { createMemoryClient, http } from 'tevm'
4import { optimism } from 'tevm/common'
5
6// create a anvil-like devnet directly in TypeScript
7const client = createMemoryClient({
8  common: optimism,
9  fork: {transport: http('https://mainnet.optimism.io')()}
10})
11
12// execute the EVM locally in the browser, node.js, deno and Bun
13const balance = await client.readContract(
14  ERC20
15    .withAddress('0x4200000000000000000000000000000000000042')
16    .read
17    .balanceOf('0xd8da6bf26964af9d7eed9e03e53415d37aa96045')
18)

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Visit Docs (under heavy construction) for docs, guides, API, and more! 📄

Contributing 💻

Contributions are encouraged, but please open an issue before making any major changes to ensure your changes will be accepted.

See CONTRIBUTING.md for contributing information.

License 📄

Most files are licensed under the MIT license. Some files copied from ethereumjs inherit the MPL-2.0 license. These files are individually marked at the top and are all in the @tevm/state, @tevm/blockchain, and other packages that wrap ethereumjs libraries.