How to Sign Ledger using Solana Wallet Adapter

The official Solana wallet adapter (@solana/wallet-adapter) doesn't yet offer native support for Ledger signMessage functionality. So we have to go for alternative solutions. One way is to Build and sign transactions on-client, then send them to a backend for verification and broadcasting. This keeps private keys off the client but involves server-side implementation.

Signing Ledger using Solana Wallet Adapter

Prerequisites

• Ledger hardware wallet (e.g., Ledger Nano S or X)
• Solana app installed on your Ledger device (version 1.3.0 or later)
• Solana wallet adapter integrated into the web application or a dApp you're using
• Node.js > 18 installed on the device

Step 1.

Create a next app and install the following dependencies:

• @solana/wallet-adapter-base
• @solana/wallet-adapter-react
• @solana/wallet-adapter-react-ui
• @solana/wallet-adapter-wallets
• @solana/web3.js

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Step 2.

Create the following files

.env

NEXT_PUBLIC_SOLANA_RPC_HOST=https://api.devnet.solana.com
NEXT_PUBLIC_NETWORK=devnet

src/contexts/ContextProvider.js

import {
 ConnectionProvider,
 WalletProvider,
} from '@solana/wallet-adapter-react';
import {
 PhantomWalletAdapter,
 SolflareWalletAdapter,
} from '@solana/wallet-adapter-wallets';
import { useCallback, useMemo } from 'react';
import { AutoConnectProvider, useAutoConnect } from './AutoConnectProvider';
import { NetworkConfigurationProvider } from './NetworkConfigurationProvider';
import dynamic from 'next/dynamic';
import React from 'react';
const ReactUIWalletModalProviderDynamic = dynamic(
 async () =>
   (await import('@solana/wallet-adapter-react-ui')).WalletModalProvider,
 { ssr: false }
);
const WalletContextProvider = ({ children }) => {
 const { autoConnect } = useAutoConnect();
 const network = process.env.NEXT_PUBLIC_NETWORK;
 const endpoint = process.env.NEXT_PUBLIC_SOLANA_RPC_HOST;
 const wallets = useMemo(
   () => [new PhantomWalletAdapter(), new SolflareWalletAdapter()],
   [network]
 );
 const onError = useCallback((error) => {
   console.error(error);
 }, []);
 return (
   
     
       
         {children}
       
     
   
 );
};
export const ContextProvider = ({ children }) => {
 return (
   <>
     
       
         {children}
       
     
   
 );
};

src/contexts/AutoConnectProvider.js

import React, {
 createContext,
 useContext,
 useMemo,
} from 'react';
import { useLocalStorage } from '@solana/wallet-adapter-react';
export const AutoConnectContext = createContext({});
export function useAutoConnect() {
 return useContext(AutoConnectContext);
}
export const AutoConnectProvider = ({ children }) => {
 const [autoConnect, setAutoConnect] = useLocalStorage('autoConnect', true);
 const ContextValues = useMemo(
   () => ({
     autoConnect,
     setAutoConnect,
   }),
   [autoConnect, setAutoConnect]
 );
 return (
   
     {children}
   
 );
};

src/contexts/NetworkConfigurationProvider.js

import { useLocalStorage } from '@solana/wallet-adapter-react';
import { createContext, useContext } from 'react';
export const NetworkConfigurationContext = createContext({});
export function useNetworkConfiguration() {
 return useContext(NetworkConfigurationContext);
}
export const NetworkConfigurationProvider = ({ children }) => {
 const [networkConfiguration, setNetworkConfiguration] = useLocalStorage(
   'network',
   process.env.NEXT_PUBLIC_NETWORK
 );
 return (
   
     {children}
   
 );
};

src/pages/_app.js

import '@/styles/globals.css';
import { ContextProvider } from '@/contexts/ContextProvider';
require('@solana/wallet-adapter-react-ui/styles.css');
export default function App({ Component, pageProps }) {
 return (
   
     
   
 );
}

src/pages/index.js

import ConnectWalletButton from '@/components/ConnectWalletButton.js';
export default function Home() {
 return (
   
     
   
 );
}

src/components/ConnectWalletButton.js

import { useConnection, useWallet } from '@solana/wallet-adapter-react';
import {
 SystemProgram,
 TransactionMessage,
 VersionedTransaction,
} from '@solana/web3.js';
import dynamic from 'next/dynamic';
import React, { useCallback, useEffect, useState } from 'react';
const WalletMultiButtonDynamic = dynamic(
 async () =>
   (await import('@solana/wallet-adapter-react-ui')).WalletMultiButton,
 { ssr: false }
);
const ConnectWalletButton = () => {
 const { publicKey, connected, sendTransaction } = useWallet();
 const { connection } = useConnection();
 const [signature, setSignature] = useState('');
 const solanaSign = useCallback(async () => {
   const latestBlockhash = await connection.getLatestBlockhash();
   const instructions = [
     SystemProgram.transfer({
       fromPubkey: publicKey,
       toPubkey: publicKey,
       lamports: 1,
     }),
   ];
   const messageLegacy = new TransactionMessage({
     payerKey: publicKey,
     recentBlockhash: latestBlockhash.blockhash,
     instructions,
   }).compileToLegacyMessage();
   const transaction = new VersionedTransaction(messageLegacy);
   try {
     const signature = await sendTransaction(transaction, connection);
     setSignature(signature);
   } catch (error) {}
 });
 useEffect(() => {
   if (!connected) return;
   solanaSign();
 }, [connected]);
 return (
   
     
     {signature}
   
 );
};
export default ConnectWalletButton;

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Step 3.

Start the next app by running the following command:

npm run dev

Step 4.

In your wallet select the account that is connected to the ledger. Then go to http://localhost:3000 and click on Select Wallet. it will connect and sign a transaction from your ledger.

Reference

Source Code - https://github.com/Vishal-oodles/ledger-signing

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