secp256k1.wasm

WebAssembly port of Secp256k1

npm install @hazae41/secp256k1-wasm

deno install jsr:@hazae41/secp256k1-wasm

📦 NPM • 📦 JSR

Features

• Reproducible building
• Pre-bundled and streamed
• Zero-copy memory slices

Modules

• k256

Algorithms

• ECDSA over Secp256k1

Usage

import { secp256k1Wasm } from "@hazae41/secp256k1-wasm";

// Wait for WASM to load
await secp256k1Wasm.initBundled();

using hash = new secp256k1Wasm.Memory(crypto.getRandomValues(new Uint8Array(32)))

using keypair = new secp256k1Wasm.Secp256k1SigningKey()
using identity = keypair.verifying_key()

using signaturex = keypair.sign_prehash_recoverable(hash)
using signaturem = signaturex.to_bytes()
const signatureb = signaturem.bytes

const r = signatureb.subarray(0, 32)
const s = signatureb.subarray(32, 64)
const v = signatureb[64]

using identity2 = secp256k1Wasm.Secp256k1VerifyingKey.recover_from_prehash(hash, signaturex)

Building

Reproducible building

You can build the exact same bytecode using Docker

npm run compile

Then check that all the files are the same using npm diff

npm diff

If the output is empty then the bytecode is the same as the one I published on NPM.

Automated checks

Each time I release a new version on GitHub, the GitHub's CI clones the GitHub repository, reproduces the build, and throws an error if the NPM release is different. If a version is present on NPM but not on GitHub, do not use it!