Sign and Broadcast Transaction

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

Retrieve an unsigned serialized transaction from the relevant API endpoint, e.g., staking/stake or staking/withdraw.
Sign the unsigned transaction using your local signer or the following code:

import { Ed25519Keypair, RawSigner } from '@mysten/sui.js';

const keypair = Ed25519Keypair.fromSecretKey(
  Uint8Array.from(Buffer.from(process.env.PRIVATE_KEY!, 'hex'))
);
const signer = new RawSigner(keypair, provider);

// Convert unsigned hex string to bytes
const txBytes = Uint8Array.from(Buffer.from(process.env.UNSIGNED_TX!, 'hex'));

const { signature } = await signer.signTransactionBlock(txBytes);

console.log('Signed TX:', signature);

Broadcast the signed transaction to the Sui network by sending a POST request to /api/v1/sui/[network]/transaction/send.

Example request (for testnet network):

curl --request POST \
     --url https://api-test.p2p.org/api/v1/sui/testnet/transaction/send \
     --header 'accept: application/json' \
     --header 'Authorization: Bearer <token>' \
     --header 'content-type: application/json' \
     --data '
{
  "transaction": "0x1f2e3d4c5b6a7e8f9a0b1c2d3e4f5g6h7i8j9k0l1m2n3o4p5q6r7s8t9u0v1w2x3y4z5a6b7c8d9e0f1g2h3i4j5k6l7m8n9o0p",
  "signature": "0x696f4402d7151fb49e52b629de3ce3098f3dda7721a7425c000b4f26653709e3"
}
'

signedTransaction — signed transaction in the hexadecimal format which needs to be broadcasted to the network.
signature — signature of the staker account address.

Example response:

{
    "error": null,
    "result": {
        "transactionDigest": "DiXajfAeTLVhiQZuW8aH2UD1XsCEoZVH4twRC5PjeK5"
    }
}

transactionDigest — hash of the transaction.

Use the transactionDigest object to check the transaction status via explorer, e.g., example of the broadcasted transaction.

What's Next?