@rosen-bridge/extended-tokens

Table of contents

• Introduction
• Installation
• Usage

Introduction

An extended version of @rosen-bridge/tokens package which enables parsing of TokenMap from Ergo boxes.

Installation

npm:

npm i @rosen-bridge/extended-tokens

yarn:

yarn add @rosen-bridge/extended-tokens

Usage

Here's a basic example of how to use this package:

import * as wasm from 'ergo-lib-wasm-nodejs';
import { parseTokenMapBoxes } from '@rosen-bridge/extended-tokens';
import JsonBigInt from '@rosen-bridge/json-bigint';
import ergoNodeClientFactory from '@rosen-clients/ergo-node';

// Fetch the token map config boxes from the Ergo Node
const nodeClient = ergoNodeClientFactory(ergoNodeUrl);
const tokenMapNFT = '123456789abcdef'; // token id of token map NFT
const res = await nodeClient.getBoxesByTokenIdUnspent(tokenMapNFT);
const configBoxes = res.filter(
  (box) =>
    box.assets?.find((token) => token.tokenId === tokenMapNFT)?.amount === 1n,
);

// Serialized the boxes
const serializedBoxes = configBoxes.map((boxJson) =>
  Buffer.from(
    wasm.ErgoBox.from_json(
      JsonBigInt.stringify(boxJson),
    ).sigma_serialize_bytes(),
  ).toString('hex'),
);

// Parse the token map JSON from the boxes
const tokens = parseTokenMapBoxes(serializedBoxes);
console.log(tokens);

Alternatively, you can use the ExtendedTokenMap class and parse the boxes directly:

const tokenMap = new ExtendedTokenMap();
await tokenMap.updateConfigByBoxes(serializedBoxes);
console.log(tokenMap.getTokens());