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Transaction

Signs an unsigned transaction and broadcasts it to chain.
FieldDescriptionType - Optional
kindTransactionString
transactionThe unsigned hex encoded transaction as shown below.String
externalIdA unique ID from your system. It can be leveraged to be used as an idempotency key (read more here).String (optional)
{
  "kind": "Transaction",
  "transaction": "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"
}

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Typescript Example with NEAR JavaScript API

First install the NEAR JavaScript API. You can find the full documentation here: https://near.github.io/near-api-js Here a code sample to broadcast a transaction via the Dfns TypeScript SDK: 
import { KeyType, PublicKey } from '@near-js/crypto'
import { JsonRpcProvider } from '@near-js/providers'
import { actionCreators, createTransaction } from '@near-js/transactions'
import { baseDecode } from '@near-js/utils'

const walletId = 'wa-172um-hgi5f-xxxxxxxxxxxxxxxx'
const wallet = await dfnsClient.wallets.getWallet({ walletId })

const provider = new JsonRpcProvider({url: process.env.NEAR_NODE_URL!})

const publicKey = new PublicKey({
  keyType: KeyType.ED25519,
  data: Buffer.from(wallet.address!, 'hex'),
})
const accessKey = await provider.viewAccessKey(wallet.address!, publicKey)
    
const nonce = accessKey.nonce++
const recentBlockHash = baseDecode(accessKey.block_hash)
const transaction = createTransaction(
  address,
  publicKey,
  'f04bc9ba7bc685d12cf87731cc4820c13920723b6a7736cf25b6bc898ccdc3a8',
  nonce,
  [actionCreators.transfer(1n)],
  recentBlockHash
)

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

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Complete examples

For a complete working example, see the SDK example on GitHub:
Last modified on March 9, 2026