Sign and Broadcast Transaction

To sign and broadcast a transaction to the Solana network, follow these steps:

Prepare unsigned transactions in Base64 encrypted format.

Sign the transaction using the following code:

const web3 = require('@solana/web3.js');
const bs58 = require('bs58');
const { Transaction } = web3

(async () => {

  // base58 signer private keys devided by comma `,`
  const privateKeys = process.env.PRIVATE_KEYS;
  // base64 unsigned transaction
  const transaction = process.env.TX

  let tx = Transaction.from(Buffer.from(transaction, 'base64'));

  // sign transaction for each signer
  for (const pk of privateKeys) {
    const signer = web3.Keypair.fromSecretKey(new Uint8Array(bs58.decode(pk)));
    tx.sign(signer)
  }
  // print signed transaction
  console.log(tx.serialize().toString('base64'))
})();

Send the signed transaction to the Solana network by making a POST request to /api/v1/solana/{network}/tx/send.

Example request (for testnet network):

curl --request POST \
     --url https://api-test.p2p.org/api/v1/solana/testnet/tx/send \
     --header 'accept: application/json' \
     --header 'authorization: Bearer <token>' \
     --header 'content-type: application/json' \
     --data '
     {
       "signedTransaction": "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"
     }'

signedTransaction — signed transaction in Base64 encrypted format.

Example response:

{
  "result": {
    "transactionId": "0x0628743b05ffb4c9d5ea2144b359af38910f0ae439a685f57d85b50b9481ba3f",
    "slot": 17168395,
    "signerAccounts": [
      "C83GxcNFTC2tK22rLCCrLKYRkckbNVGsjethN5iswgfC"
    ],
    "createdAt": "2023-08-15T15:07:54.795Z"
  }
}

transactionId — block hash in which the transaction was included.
slot — period of time during which each leader collects transactions and creates a block in the Solana network.
signerAccounts — account addresses that signed the transaction.
createdAt — timestamp of the transaction in the ISO 8601 format.

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