OnchainEvm

Rust NIFs for Elixir: local EVM simulation via revm, Solidity ABI parsing via Alloy, debug/trace APIs, and contract codegen. Built on onchain.

Installation

Requires Rust toolchain for NIF compilation.

def deps do
  [
    {:onchain, "~> 0.4"},
    {:onchain_evm, "~> 0.1"}
  ]
end

Modules

Module	Purpose
`Onchain.EVM`	Local EVM execution (fork mainnet, simulate transactions)
`Onchain.Solidity`	Alloy-powered Solidity ABI parser
`Onchain.Trace`	Debug/trace APIs (trace_transaction, trace_call, storage_at)
`Onchain.Contract.Generator`	`.sol` file -> typed Elixir module at compile time

Discovery

All modules use descripex for self-describing APIs:

OnchainEvm.describe()                     # Module overview
OnchainEvm.describe(:evm)                 # Function listings
OnchainEvm.describe(:evm, :simulate_call) # Full function details

Configuration

EVM simulation requires an RPC URL passed per-call:

Onchain.EVM.simulate_call(address, calldata, rpc_url: "https://eth-mainnet.example.com")