Pegin NPM | npm.io

Pegin

TypeScript module to pegin Bitcoin into Liquid Bitcoin in the browser

Usage

Install from npm

npm install --save pegin
# or with yarn
yarn add pegin

Use in your JavaScript or TypeScript project, works in the browser!

import ElementsPegin from 'pegin';

const peginModule = new ElementsPegin(
  await ElementsPegin.withGoElements(),
  await ElementsPegin.withLibwally(),
  // Optionals, defaults are dynfed is off, mainnet and hardcoded fedpeg script
  ElementsPegin.withDynamicFederation(false),
  ElementsPegin.withMainnet(),
  ElementsPegin.withFederationScript('my_Fed_Peg_Script_XXXYYYXXX')
);

const address = await peginModule.getMainchainAddress(
  '0014efcee7e291eb23654650b3eb950fca21d01ee37e' // Liquid script
);

console.log(address); // Bitcoin address

Development

Compile wasm wrappers

git submodule update --init --recursive

Build Go Elements and Libwally to WASM

make build

Test

npm test

Build the TS lib

npm run build

Project

The Typescript lib entrypoint is src/index.ts.
resources/wallycore.js is the compiled WebAssembly lib from LibwallyCore build using resources/Dockerfile.libwally.
resources/wasm_exec.js is the WebAssembly runner for Golang.
elements.wasm is compiled from wrappers in main.go using resources/Dockerfile.goelements.
elements.js is the JavasScript glue with the base64 encoded wasm file packaged in the npm module.