JS Proto Danksharding

This is a pure* typescript version of EIP4844. It is ESM compatible and the speed is acceptable for web usage.

*pure it uses WASM for one function.

Exceptions

Currently the code does not throw unless it would indicate a bug. The effect of this is that many of the functions return T | Error. This means that the caller needs to explicitly check for errors and decide if they want to throw or not.

This decision was intentional, however if it is more conventional to throw, we can do this at the API level.

API

The API is still in flux, currently it takes in types like Bytes48 which can be created from a Uint8Array. It may be easier for the caller, if we have an API which is pure Uint8Array and we either throw and exception or return an error when we convert it to fixed size types.

Installation

npm install @crate-crypto/crate-4844

Example usage

// Taken from tests/index.test.ts
import { Context } from "../src/index.js"

let context = new Context()
let blob = ...
let { proof, commitment } = assertNoErrorThrow(context.computeBlobKZGProf(blob))
let result = context.verifyBlobKZGProof(blob, commitment, proof)
expect(result).to.not.be.instanceOf(Error)