zeropool-client-js

TypeScript/JavaScript client library for creating and sending shielded ZeroPool transactions.

Installation

npm install zeropool-client-js --save

or

yarn add zeropool-client-js

Setup

The default Webpack 5 configuration should be sufficient for this library. The only requirement is that it must properly process the new URL('...', import.meta.url) syntax.

Multithread version

Enable the following headers on your server to enable the multithreaded mode:

Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp

On average, this will speed up the transaction creation process by about 2.5-3 times.

Usage example

import { init, ZeropoolClient, EvmNetwork } from 'zeropool-client-js';

// Use https://github.com/zeropoolnetwork/libzeropool CLI to generate theese files
const snarkParams = {
  transferParamsUrl: '/path/to/transfer/params',
  transferVkUrl: '/path/to/transfer/vk',
};

// Initialize the library.
init(snarkParams)
  .then(async (ctx) => {
      // Spending key
      const sk = new Uint8Array(32);

      // Configurations for each supported token.
      const tokens = {
        'token address': {
          poolAddress: '...',
          relayerUrl: '...',
        }
      };

      const evmRpcUrl = '...';
      const network = new EvmNetwork(evmRpcUrl);
      const client = await ZeropoolClient.create({
        sk,
        tokens,
        snarkParams: ctx.snarkParams,
        worker: ctx.worker,
        networkName: 'ethereum',
        network,
      });

      const signFunction = (data) => sign(data);

      await client.deposit(tokenAddress, amountWei, signFunction);
  });