Transfer USDC on testnet between Aptos and Base using CCTP V1

This is CCTP V1 version. For the latest version, see CCTP.

To get started with CCTP V1 on Aptos testnet, follow the example scripts provided on GitHub. The examples use the Aptos SDK, to transfer USDC to and from an address on Aptos testnet and an address on an external blockchain.

Do not reuse keys As a security measure, these scripts should only be used on a testnet for testing purposes. It is not recommended to reuse private keys across mainnet and testnet.

Summary of calling deposit_for_burn() (full runnable script can be found in the aptos-cctp repository):

// Aptos Testnet Stablecoin object
const BURN_TOKEN =
  "0x69091fbab5f7d635ee7ac5098cf0c1efbe31d68fec0f2cd565e8d168daf52832";

const aptosClient = new Aptos(new AptosConfig({ network: Network.TESTNET }));
const userAccount = Account.fromPrivateKey({
  privateKey: new Ed25519PrivateKey(APTOS_PRIVATE_KEY),
});

// Create a transaction with deposit for burn script
const buffer = readFileSync(
  "typescript/example/precompiled-move-scripts/testnet/deposit_for_burn.mv",
);
const bytecode = Uint8Array.from(buffer);
const amount = new U64(1);
const destinationDomain = new U32(6);
const burnToken = AccountAddress.from(BURN_TOKEN);
const mintRecipient = AccountAddress.from(evmSigner.address);
const functionArguments: Array<any> = [
  amount,
  destinationDomain,
  mintRecipient,
  burnToken,
];
const transaction = await aptosClient.transaction.build.simple({
  sender: userAccount.accountAddress,
  data: {
    bytecode,
    functionArguments,
  },
});
const pendingTxn = await aptosClient.signAndSubmitTransaction({
  signer: userAccount,
  transaction,
});
const depositForBurnTx = await aptosClient.waitForTransaction({
  transactionHash: pendingTxn.hash,
});
console.log(
  `Deposit for burn transaction completed successfully: https://explorer.aptoslabs.com/txn/${depositForBurnTx.hash}`,
);

// Fetch the event data from the transaction
const messageSentEvent = (
  depositForBurnTx as UserTransactionResponse
).events.find(
  (e: any) =>
    e.type ===
    `${MESSAGE_TRANSMITTER_PACKAGE_ID}::message_transmitter::MessageSent`,
);

Summary of calling receive_message() (full runnable script can be found in the aptos-cctp repository):

const bytecode = Uint8Array.from(
  fs.readFileSync(
    "typescript/example/precompiled-move-scripts/testnet/handle_receive_message.mv",
  ),
);
const functionArguments: Array<any> = [
  MoveVector.U8(messageBytes as Buffer),
  MoveVector.U8(attestationSignature),
];
const transaction = await aptosClient.transaction.build.simple({
  sender: userAccount.accountAddress,
  data: {
    bytecode,
    functionArguments,
  },
});
const pendingTxn = await aptosClient.signAndSubmitTransaction({
  signer: userAccount,
  transaction,
});
const receiveMessageTx = await aptosClient.waitForTransaction({
  transactionHash: pendingTxn.hash,
});
console.log(
  `Receive message transaction completed successfully: https://explorer.aptoslabs.com/txn/${receiveMessageTx.hash}`,
);