Aptos

Aptos supports the following signature kinds:

• Transaction, unsigned transaction.

Transaction

Signs an unsigned transaction in BCS format.

Field	Description	Type - Optional
blockchainKind	Aptos	String
kind	Transaction	String
transaction	The unsigned BCS format transaction in hex encoding. More details bellow.	String

{
  "blockchainKind": "Aptos",
  "kind": "Transaction",
  "transaction": "0xc5510ac408dcb78034b4fdcdaea6582c10f2e0d03dc684d32f9457b9d778e113020000000000000002000000000000000000000000000000000000000000000000000000000000000104636f696e087472616e73666572010700000000000000000000000000000000000000000000000000000000000000010a6170746f735f636f696e094170746f73436f696e0002205bdc24cb9033286ffe19f436145b9e2267dd03b0fd0d422459d381a6431d39ba080100000000000000400d0300000000006400000000000000cce1f2670000000002"
}

Transaction Format

We accept two transaction kinds to be signed:

• RawTransaction, this is the simplest transaction, no external fee payer, no secondary signers.

• SignedTransaction, for more complex transaction, you can pass a SignedTransaction that will contains the RawTransaction and an authenticator depending on the transaction. Accepted authenticator are:

  • TransactionAuthenticatorFeePayer for sponsored transactions (single/multi sig)

  • TransactionAuthenticatorMultiAgent for multi signature transactions (not sponsored)

All the passed transactions should be BCS serialized and in hex encoding.

You can find advanced transaction constructs in our Dfns TypeScript SDK.

Typescript Example with Aptos SDK

First install the Aptos SDK. You can find the source code here: https://github.com/aptos-labs/aptos-ts-sdk

Here a code sample to generate a signature for a basic transaction via the Dfns TypeScript SDK:

import {
  Aptos, 
  APTOS_COIN, 
  AptosConfig, 
  MimeType, 
  Network, 
  PendingTransactionResponse, 
  postAptosFullNode
} from '@aptos-labs/ts-sdk'


const walletId = 'wa-6lbfv-9esgj-88s80c0qsih0a393'
const wallet = await dfnsClient.wallets.getWallet({ walletId })

const myAddress = new PublicKey(wallet.address)
const toAddress = new PublicKey('0x5bdc24cb9033286ffe19f436145b9e2267dd03b0fd0d422459d381a6431d39ba')

const aptosConfig = new AptosConfig({
    network: Network.TESTNET,
  })
const client = new Aptos(aptosConfig)

const tx = await client.transaction.build.simple({
    sender: wallet.address,
    data: {
      function: '0x1::coin::transfer',
      typeArguments: [APTOS_COIN],
      functionArguments: [
        "0x5bdc24cb9033286ffe19f436145b9e2267dd03b0fd0d422459d381a6431d39ba", // Receiver
        "1", // Amount
      ],
    },
  })

const signed = (await wallet.signTransaction(tx))

const { data } = await postAptosFullNode<Uint8Array, PendingTransactionResponse>({
  aptosConfig: client.config,
  body: signed.bcsToBytes(),
  path: 'transactions',
  originMethod: 'submitTransaction',
  contentType: MimeType.BCS_SIGNED_TRANSACTION,
})

// Wait for the transaction to be included
await client.waitForTransaction({transactionHash: data.hash})