@umaprotocol/web3-subprovider

@ledgerhq/web3-subprovider

Library for Ledger Hardware Wallets.

Github, Ledger Devs Slack

API

Table of Contents

• SubproviderOptions
  • Properties
• createLedgerSubprovider
  • Parameters
  • Examples

SubproviderOptions

Type: {networkId: number, path: string?, askConfirm: boolean?, accountsLength: number?, accountsOffset: number?}

Properties

• networkId number
• path string?
• askConfirm boolean?
• accountsLength number?
• accountsOffset number?

createLedgerSubprovider

Create a HookedWalletSubprovider for Ledger devices.

Parameters

• getTransport function (): Transport<any> gets lazily called each time the device is needed. It is a function that returns a Transport instance. You can typically give ()=>TransportU2F.create()
• options SubproviderOptions?

Examples

import Web3 from "web3";
import createLedgerSubprovider from "@ledgerhq/web3-subprovider";
import TransportU2F from "@ledgerhq/hw-transport-u2f";
import ProviderEngine from "web3-provider-engine";
import RpcSubprovider from "web3-provider-engine/subproviders/rpc";
const engine = new ProviderEngine();
const getTransport = () => TransportU2F.create();
const ledger = createLedgerSubprovider(getTransport, {
accountsLength: 5
});
engine.addProvider(ledger);
engine.addProvider(new RpcSubprovider({ rpcUrl }));
engine.start();
const web3 = new Web3(engine);

Returns HookedWalletSubprovider