A JavaScript (and TypeScript) library for interacting with the Filecoin's Lotus node, with support for external signers.

:warning: The library is currently in ALPHA: things will not work or work incorectly, will break and the API will change! :warning:

Installing

Node:

npm install --save filecoin.js

Browser:

<script type="text/javascript" src="https://unpkg.com/filecoin.js"></script>
<!-- window.FilecoinJs object contains the library exports -->

Using

Node JavaScript/TypeScript:

import { HttpJsonRpcConnector, MnemonicWalletProvider } from 'filecoin.js';

(async () => {

  const connector = new HttpJsonRpcConnector({ url: __LOTUS_RPC_ENDPOINT__, token: __LOTUS_AUTH_TOKEN__ });

  const hdWalletMnemonic = 'equip ... young';
  const hdWalletPassword = '...';
  const hdDerivationPath = `m/44'/461'/0'/0/0`;

  const walletProvider = new MnemonicWalletProvider(
    connector,
    hdWalletMnemonic,
    hdWalletPassword,
    hdDerivationPath
  );

  const myAddress = await walletProvider.getDefaultAccount();
  console.log(myAddress);
  // f1zx43cf6qb6rd...

})().then().catch();

Browser:

<script type="text/javascript" src="https://unpkg.com/filecoin.js"></script>
<script type="text/javascript">
(async () => {

  const connector = new FilecoinJs.HttpJsonRpcConnector({ url: __LOTUS_RPC_ENDPOINT__, token: __LOTUS_AUTH_TOKEN__ });

  const hdWalletMnemonic = 'equip ... young';
  const hdWalletPassword = async () => await window.prompt(),;
  const hdDerivationPath = `m/44'/461'/0'/0/0`;

  const walletProvider = new FilecoinJs.MnemonicWalletProvider(
    connector,
    hdWalletMnemonic,
    hdWalletPassword,
    hdDerivationPath
  );

  const myAddress = await walletProvider.getDefaultAccount();
  console.log(myAddress);
  // f1zx43cf6qb6rd...

})().then().catch();
</script>

Examples

Sending some FIL to someAddress:

    const message = await walletProvider.createMessage({
      From: myAddress,
      To: someAddress,
      Value: new BigNumber(42),
    });

    const msgCid = await walletProvider.sendSignedMessage(
      await walletProvider.signMessage(message)
    );

Check out the tests or examples folders for more usage examples.

Documentation

As with the rest of the library, the documentation is WIP. As it evolves the documentation site will be updated.

Contributing

Feel free to join in. All welcome. Open an issue!

License

Dual-licensed under MIT + Apache 2.0