Strict TypeScript types for Ethereum ABIs. ABIType provides utilities and type definitions for ABI properties and values, covering the Contract ABI Specification, as well as EIP-712 Typed Data.

ts
import { AbiParametersToPrimitiveTypes, ExtractAbiFunction } from 'abitype'
import { erc20Abi } from 'abitype/abis'
 
type TransferInputTypes = AbiParametersToPrimitiveTypes<
             
type TransferInputTypes = readonly [`0x${string}`, bigint]
  ExtractAbiFunction<typeof erc20Abi, 'transfer'>['inputs']
>Try

ts
import { AbiParametersToPrimitiveTypes, ExtractAbiFunction } from 'abitype'
import { erc20Abi } from 'abitype/abis'
 
type TransferInputTypes = AbiParametersToPrimitiveTypes<
             
type TransferInputTypes = readonly [`0x${string}`, bigint]
  ExtractAbiFunction<typeof erc20Abi, 'transfer'>['inputs']
>Try

Works great for adding blazing fast autocomplete and type checking to functions, variables, or your own types. No need to generate types with third-party tools – just use your ABI and let TypeScript do the rest!

TL;DR ​

ABIType might be a good option for your project if:

• You want to typecheck your ABIs or EIP-712 Typed Data.
• You want to add type inference and autocomplete to your library based on user-provided ABIs or EIP-712 Typed Data, like wagmi and viem.
• You need to convert ABI types (e.g. 'string') to TypeScript types (e.g. string) or other type transformations.
• You need to validate ABIs at runtime (e.g. after fetching from external resource).
• You don’t want to set up a build process to generate types (e.g. TypeChain).

Install ​

Read the Getting Started guide to learn more how to use ABIType.

pnpm add abitype

pnpm add abitype

bun add abitype

bun add abitype

npm i abitype

npm i abitype

yarn add abitype

yarn add abitype

Sponsor ​

If you find ABIType useful, please consider supporting development on GitHub Sponsors or sending crypto to wagmi-dev.eth. Thank you 🙏

Community ​

If you have questions or need help, reach out to the community at the ABIType GitHub Discussions.