Use muxed account for payment

In this example we will see how to use a muxed account in a payment.

Muxed accounts can furthermore be used in:

• payment operation destination
• payment strict receive operation destination
• payment strict send operation destination
• any operation source account
• account merge operation destination
• transaction source account
• fee bump transaction fee source

// Create two random key pairs, we will need them later for signing.
KeyPair senderKeyPair = KeyPair.random();
KeyPair receiverKeyPair = KeyPair.random();

// AccountIds
String accountCId = receiverKeyPair.accountId;
String senderAccountId = senderKeyPair.accountId;

// Create the sender account.
await FriendBot.fundTestAccount(senderAccountId);

// Load the current account data of the sender account.
AccountResponse accountA = await sdk.accounts.account(senderAccountId);

// Create the receiver account.
Transaction transaction = new TransactionBuilder(accountA)
    .addOperation(
        new CreateAccountOperationBuilder(accountCId, "10").build())
    .build();

// Sign.
transaction.sign(senderKeyPair, Network.TESTNET);

// Submit.
SubmitTransactionResponse response = await sdk.submitTransaction(transaction);

// Now let's create the mxued accounts to be used in the payment transaction.
MuxedAccount muxedDestinationAccount = MuxedAccount(accountCId, 8298298319);
MuxedAccount muxedSourceAccount = MuxedAccount(senderAccountId, 2442424242);

// Build the payment operation.
// We use the muxed account objects for destination and for source here.
// This is not needed, you can also use only a muxed source account or muxed destination account.
PaymentOperation paymentOperation =
    PaymentOperationBuilder.forMuxedDestinationAccount(
            muxedDestinationAccount, Asset.NATIVE, "100")
        .setMuxedSourceAccount(muxedSourceAccount)
        .build();

// Build the transaction.
// If we want to use a Med25519 muxed account with id as a source of the transaction, we can just set the id in our account object.
accountA.muxedAccountMed25519Id = 44498494844;
transaction = new TransactionBuilder(accountA)
    .addOperation(paymentOperation)
    .build();

// Sign.
transaction.sign(senderKeyPair, Network.TESTNET);

// Submit.
response = await sdk.submitTransaction(transaction);

// Have a look to the transaction and the contents of the envelope in Stellar Laboratory
// https://laboratory.stellar.org/#explorer?resource=transactions&endpoint=single&network=test
print(response.hash);

Since version 1.2.9 also use muxed “M…” addresses are supported by default as source account ids and destination account ids.

For example:

String sourceAccountId = "MD6HSPJQPCQBMMSPP33SMERH32U5ZWIJN7DAD2V3UPWZBO347GN3EAAAAAAAAAPGE4NB4";
String destinationAccountId = "MBUZNQV4SSPFZPLIK55ZQ4SZWROKZLJQ62YF5Q3IKJAD5ICYCC3JSAAAAAAAABHOUBCZ4";

PaymentOperation paymentOperation = new PaymentOperationBuilder(destinationAccountId, Asset.NATIVE, "100")
    .setSourceAccount(sourceAccountId)
    .build();