Solana Signers V2 is a modern approach to handling transaction signing on Solana. This guide will show you how to integrate Para’s wallet and signing capabilities with Solana using our Signers V2 integration package.

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Prerequisites

To use Para, you need an API key. This key authenticates your requests to Para services and is essential for integration. Before integrating Para with your application, ensure you have:

  • Completed Para authentication setup in your application (see one of our Setup Guides)
  • A valid Para API key
  • An RPC endpoint for your desired network

Need an API key? Visit the Developer Portal to create API keys, manage billing, teams, and more.

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Installation

Choose your preferred package manager to install the required dependencies:

npm install @getpara/solana-signers-v2-integration@alpha @solana/kit

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Setting Up the Signer

Initialize the Para Solana V2 signer using the createParaSolanaSigner function:

import { createParaSolanaSigner, ParaSolanaSigner } from "@getpara/solana-signers-v2-integration";
import { createSolanaRpc } from "@solana/kit";
import { useClient } from "@getpara/react-sdk"; // or your Para client initialization

// Get Para client
const para = useClient();

// Create RPC client using @solana/kit (required for Para signer)
const paraRpc = createSolanaRpc("https://api.testnet.solana.com");

// Create the Para Solana Signer
const signer: ParaSolanaSigner = createParaSolanaSigner({
  para: para,
  rpc: paraRpc,
});

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Message Signing

Sign messages using the signer:

import { getUtf8Encoder } from "@solana/codecs";
import bs58 from "bs58";

// Convert message to bytes
const message = "Hello, Solana!";
const messageBytes = new Uint8Array(getUtf8Encoder().encode(message));

// Sign the message
const signatureResult = await signer.signMessages([
  { content: messageBytes, signatures: {} }
]);

// Get the signature
const signatureBytes = signatureResult[0][signer.address];
const signatureBase58 = bs58.encode(signatureBytes);

console.log("Signature:", signatureBase58);

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Transaction Signing and Sending

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Sign and Send Transactions

The Para Solana Signer provides a convenient signAndSendTransactions method that handles both signing and sending in one step:

import { Transaction, SystemProgram, LAMPORTS_PER_SOL } from "@solana/kit";

// Create a transaction (example: transfer SOL)
const transaction = new Transaction().add(
  SystemProgram.transfer({
    fromPubkey: signer.sender,
    toPubkey: recipientPublicKey,
    lamports: LAMPORTS_PER_SOL * 0.1, // 0.1 SOL
  })
);

// Sign and send the transaction in one step
const signatures = await signer.signAndSendTransactions([transaction]);
const signature = signatures[0];

console.log("Transaction signature:", signature);

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Signing Transactions Only

If you need to sign transactions without sending them immediately:

import { getBase64EncodedWireTransaction } from "@solana/kit";

// Sign the transaction
const signedTxs = await signer.modifyAndSignTransactions([transaction]);
const signedTx = signedTxs[0];

// Serialize for later use
const serializedTx = getBase64EncodedWireTransaction(signedTx);

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Key Properties and Methods

The ParaSolanaSigner provides the following key properties and methods:

  • address: Get the wallet address as a string
  • sender: Get the wallet public key buffer
  • signMessages(): Sign messages
  • modifyAndSignTransactions(): Sign transactions without sending
  • signAndSendTransactions(): Sign and send transactions in one step

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Server-Side Signing

Para’s signers can also be used on the server-side using pregen wallets or an active client side session. To learn more about using para on the server, check out these guides:

Para Server SDK Setup

Para Server SDK Setup

Setup the Para Server SDK to use Para's signers on the server-side.

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Examples

If you’d like to learn more about how to use the ParaSolanaSigner for different transaction types, check out this example in our Examples Hub:

Para Solana Signers V2 Example

Para Solana Signers V2 Example

This signers-v2 example shows how to use the ParaSolanaSigner with different transaction types.