Solana Examples

import { MessageV0, VersionedTransaction, PublicKey } from '@solana/web3.js';
import bs58 from 'bs58';

/**
 * Signs a Solana operation with a private key
 * @param accountAddress - Your Solana account address
 * @param privateKey - Your private key in base58 format
 * @param chainOp - Chain operation from quote response
 * @returns Signed chain operation
 */
function signSolanaChainOperation(accountAddress: string, privateKey: string, chainOp: any) {
  const msgBuffer = Buffer.from(chainOp.dataToSign, 'base64');
  const message = MessageV0.deserialize(msgBuffer);
  const transaction = new VersionedTransaction(message);

  const decodedKey = bs58.decode(privateKey);
  transaction.sign([{
      publicKey: new PublicKey(accountAddress),
      secretKey: Buffer.from(decodedKey),
  }]);

  const signature = bs58.encode(Buffer.from(transaction.signatures[transaction.signatures.length - 1]));
  return { ...chainOp, signature };
}

{
  "id": "0xcd3a5cfe80d1b84db755bfb8ebe0a617ff153cc48ab6d5ab28436386f06ce100",
  "accounts": [{
    "type": "solana",
    "accountAddress": "J5CCzBULFax899tcirb6wMbenQUd8whbaetG7EfSick5"
  }],
  "originToken": {
    "assetType": ["solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp/slip44:501"],
    "amount": "10000000",
    "fiatValue": "1.67"
  },
  "destinationToken": {
    "assetType": "eip155:42161/erc20:0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "1570450", // ~1.57 USDC on Arbitrum
    "minimumAmount": "1516171",
    "fiatValue": "1.57",
    "recipientAccount": "eip155:42161:0x895Cf62399bF1F8b88195E741b64278b41EB7F09"
  },
  "fees": {
    "cumulativeUSD": "0.12"
  }
}

// Sign and execute the cross-chain operation
const solanaOp = quote.originChainsOperations.find(op => op.type === 'solana');
const signedOp = await signSolanaOperation(solanaOp.dataToSign, wallet);

const executeRequest = {
  ...quote,
  originChainsOperations: [{ ...solanaOp, signature: signedOp }]
};

const result = await fetch('https://be.onebalance.io/api/v3/quote/execute', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': '42bb629272001ee1163ca0dbbbc07bcbb0ef57a57baf16c4b1d4672db4562c11'
  },
  body: JSON.stringify(executeRequest)
});

const execution = await result.json();
console.log('Cross-chain swap completed:', execution);

async function signMultiAccountQuote(quote: any, solanaWallet: any, evmSigner: any) {
  const signedOperations = await Promise.all(
    quote.originChainsOperations.map(async (operation: any) => {
      if (operation.type === 'solana') {
        const signature = await signSolanaOperation(operation.dataToSign, solanaWallet);
        return { ...operation, signature };
      } else {
        // Sign EVM operation with typed data
        const signature = await evmSigner.signTypedData(operation.typedDataToSign);
        return { 
          ...operation, 
          userOp: { ...operation.userOp, signature }
        };
      }
    })
  );
  
  return {
    ...quote,
    originChainsOperations: signedOperations
  };
}

// Execute the multi-account operation
const signedQuote = await signMultiAccountQuote(quote, solanaWallet, evmSigner);

const result = await fetch('https://be.onebalance.io/api/v3/quote/execute', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': '42bb629272001ee1163ca0dbbbc07bcbb0ef57a57baf16c4b1d4672db4562c11'
  },
  body: JSON.stringify(signedQuote)
});

const execution = await result.json();
console.log('Aggregated swap completed:', execution);