Libra Core

Libra Core [js] is a javascript library client that can be used to interact with libra nodes.

This is still under heavy development and testing, so not ready yet

The end goal is to make it usable both in node and on browser clients too, but currently it is mostly compatible with node.

Installation

To install with npm run:

npm install libra-core

Usage

You would most likely interact with these two modules

import { LibraWallet, LibraClient } from 'libra-core';

Creating an Account

In order to create a libra account, you would need to instantiate the LibraWallet like:

// you may need to use require for node
import { LibraWallet, Account as LibraAccount } from 'libra-core';

// please don't use this mnemonic outside of this sample code
const wallet = new LibraWallet({
        mnemonic: 'upgrade salt toy stable drop paddle'
      });

// generate a new account
const account = wallet.newAccount();

// or if you have your secret key you can create an account from it
// const secretKey = 'pub-hex-secret-key-here' 
// const account = LibraAccount.fromSecretKey(secretKey);


// you can see your address by:
console.log(account.getAddress().toHex());

Minting Amount

Currently minting only works for testnet and uses the faucet service.

To mint you need to create a LibraClient and use it to mint

import { LibraClient, LibraNetwork } from 'libra-core';

async function main() {
  const client = new LibraClient({ network: LibraNetwork.Testnet });

  const account = wallet.newAccount();

  // mint 2 libracoins to users accounts
  await client.mintWithFaucetService(account.getAddress(), 20e6);
}

await main();

Checking an address balance

async function main() {
  const client = new LibraClient({ network: LibraNetwork.Testnet });

  const accountAddress = '854563c50d20788fb6c11fac1010b553d722edb0c02f87c2edbdd3923726d13f';
  const accountState = await client.getAccountState(accountsAddress);

  // log account balance
  console.log(accountState.balance.toString());

  // Account state has other information that you could be interested in such as `sequenceNumber`.
}

await main();

Transferring Libra Coins

You will eventually be able to transfer libra coins from your account to another account using client.transferCoins() function, but it is still a work in progress. You are welcome to help contribute to making this work.

Executing Transactions with Custom Program

You will eventually be able to transfer libra coins from your account to another account using client.execute() function, but it is also still a work in progress. You are welcome to help contribute to making this work as well.

Development

• Clone the repository
• Run npm install to install the dependency
• Test with npm test
• You might need to run npm install -g grpc-tools if you want to regenerate protobuffer classes

Contribution

Feel free to contribute by opening issues or PR's to this repository

License

MIT