LedgerWallet

ledgerWallet.ts

import { Keypair, PublicKey, Transaction } from "@solana/web3.js";
import TransportNodeHid from "@ledgerhq/hw-transport-node-hid";
import Solana from "@ledgerhq/hw-app-solana";
import { Wallet } from "@project-serum/anchor/dist/esm/provider";

export class LedgerWallet implements Wallet {
  public publicKey: PublicKey;
  public payer: Keypair;

  private ledgerPath: string;
  private solana: Solana;

  public static async fromPath(path: string): Promise<LedgerWallet | void> {
    try {
      const transport = await TransportNodeHid.create();
      const solana = new Solana(transport);
      const response = await solana.getAddress("44'/501'/5'");
      const address = new PublicKey(response.address);

      const wallet = new LedgerWallet(path, address, solana);
      return wallet;
    } catch (error) {
      console.error(error);
    }
  }

  private constructor(readonly path: string, address: PublicKey, solana: Solana) {
    this.ledgerPath = path;
    this.publicKey = address;
    this.solana = solana;
  }

  public async signTransaction(tx: Transaction): Promise<Transaction> {
    const signature = await this.solana.signTransaction(this.path, tx.serializeMessage());
    tx.addSignature(this.publicKey, signature.signature);
    return tx;
  }

  public async signAllTransactions(txs: Transaction[]): Promise<Transaction[]> {
    for (const tx of txs) {
      const signature = await this.solana.signTransaction(this.path, tx.serializeMessage());
      tx.addSignature(this.publicKey, signature.signature);
    }
    return txs;
  }

}