Tevm NPM | npm.io

tevm-monorepo

Tevm is an ethereum development toolkit that offers

Arbitrary EVM execution and forking akin to [anvil](https://github.com/foundry-rs/foundry/tree/master/crates/anvil)
A powerful solidity scripting environment akin to [foundry scripts](https://book.getfoundry.sh/tutorials/solidity-scripting)
Build tooling to create a smooth interface between your Solidity scripts and TypeScript code

Tevm runs in all environments

[All modern browsers](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API#browser_compatibility)
[Node.js >=18](https://nodejs.org/en)
[Bun](https://bun.sh)

Try it out

Try out our [online frontend example on stackblitz](https://stackblitz.com/~/github.com/evmts/tevm-vite-wagmi-example)

Visit [Docs](https://tevm.sh/) for docs, guides, API and more! 📄

Code example

Tevm scripting is a simple yet powerful way to program.

Write a solidity script HelloWorld.s.sol

// SPDX-License-Identifier: MIT
pragma solidity >0.8.0;

contract HelloWorld {
    function greet(string memory name) public pure returns (string memory) {
        return string(abi.encodePacked("Hello ", name, "!"));
    }
}

Import the solidity file into a JavaScript or TypeScript file. No need to compile it.

import { HelloWorld } from "./HelloWorld.sol";

console.log(HelloWorld.abi);
console.log(HelloWorld.bytecode);

Initialize a [Tevm memory client](./packages/memory-client/docs/functions/createMemoryClient.md) and execute your Script using the [tevm.script](./packages/actions/docs/type-aliases/ScriptHandler.md) action

import { HelloWorld } from "./HelloWorld.sol";
import { createMemoryClient } from "tevm";

const client = createMemoryClient();

const result = await tevm.script(HelloWorld.read.greate("World"));

console.log(result.data); // Hello world!

This is just a small subset of what Tevm offers. See [docs](https://tevm.sh/) for more information.