Solana

Transaction

Signs an unsigned transaction and broadcasts it to chain.

Field	Description	Type - Optional
kind	Transaction	String
transaction	The unsigned hex encoded transaction as shown below	String
externalId	A unique ID from your system. It can be leveraged to be used as an idempotency key (read more here).	String (optional)

{
  "kind": "Transaction",
  "transaction": "0x01000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008001000103b25c8c464080ab2835a166d2b3f13195c2ff3c8f281c7ebe492f0d45d830ff4824a8b38a94b73d2756f2be68655a49706be9b1dc900978984d6eeaf65ab62e900000000000000000000000000000000000000000000000000000000000000000280c73cfb9caeb41b8508d20057917b568ac1f5a4175b5befa94532b3fd0b92e01020200010c02000000010000000000000000"
}

Solana web3.js expects the serialized transaction to include 0-padded placeholder signatures, otherwise deserialization will failed. If you are using a different library to construct the serialized transaction, such as the Go SDK, please make sure to include the placeholder signatures.

Typescript Example with Solana web3.js

First install the Solana web3.js SDK. You can find the full documentation here: https://docs.solana.com/developing/clients/javascript-api

Here a code sample to broadcast a transaction via the Dfns TypeScript SDK:

import {
  clusterApiUrl,
  Connection,
  PublicKey,
  SystemProgram,
  TransactionMessage,
  VersionedTransaction,
} from '@solana/web3.js'

const walletId = 'wa-6lbfv-9esgj-xxxxxxxxxxxxxxxx'
const wallet = await dfnsClient.wallets.getWallet({ walletId })

const myAddress = new PublicKey(wallet.address)
const toAddress = new PublicKey('3U6stgsD1FmA7o3omUguritCU8iWmUM7Rs6KqAHHxHVZ')

const connection = new Connection(clusterApiUrl('devnet'), 'confirmed')
const latestBlockhash = await connection.getLatestBlockhash()

const message = new TransactionMessage({
  payerKey: myAddress,
  recentBlockhash: latestBlockhash.blockhash,
  instructions: [
    SystemProgram.transfer({
      fromPubkey: myAddress,
      toPubkey: toAddress,
      lamports: 1n,
    }),
  ],
}).compileToV0Message()
const transaction = new VersionedTransaction(message)

const res = await dfnsClient.wallets.broadcastTransaction({
  walletId,
  body: {
    kind: 'Transaction',
    transaction: `0x${Buffer.from(transaction.serialize()).toString('hex')}`,
  },
})