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Multikey Accounts

The Aptos .NET SDK provides an implementation of Multikey accounts to create accounts from a combination of multiple key pairs. This is useful for Multisig accounts. In this guide, we will provide snippets of creating accounts.

Creating a MultiKeyAccount

MultiKeyAccount’s are created to sign transactions where the account is controlled by multiple private keys.

Create a MultiKeyAccount

To create a MultiKey account, you will need the following components:

PublicKeys: The public keys of the accounts that control the MultiKey account.
SignaturesRequired: The minimum number of signers required to sign transactions.
Signers: The account signers that will be used to sign transactions. The number of signers should be equal to or greater than the SignaturesRequired.

Create your Accounts

Create your accounts, they can be different types of accounts.

var account1 = Ed25519Account.Generate();
var account2 = SingleKeyAccount.Generate(PublicKeyVariant.Secp256k1Ecdsa);

Create a MultiKey Verifying Key

Create a MultiKey verifying key using the PublicKeys and SignaturesRequired. In this example, we have two accounts controlling the MultiKey and we require 2 signers to sign transactions.

var multiKey = new MultiKey(
    publicKeys: [account1.PublicKey, account2.PublicKey],
    signaturesRequired: 2,
);

Create the MultiKey Account

Create the MultiKey account using the PublicKeys, SignaturesRequired, and Signers.

var multikeyAccount = new MultiKeyAccount(
    multiKey: multiKey,
    signers: [account1, account2]
);

Sign and Submit transactions

After creating a MultiKey account, you can sign and submit transactions using the AptosClient.

// 1. Build the transaction
var transaction = await client.Transaction.Build(
    sender: multikeyAccount,
    data: new GenerateEntryFunctionPayloadData(
        function: "0x1::aptos_account::transfer_coins",
        typeArguments: ["0x1::aptos_coin::AptosCoin"],
        functionArguments: [account.Address, "100000"]
    )
);
 
// 2. Sign and submit the transaction
var submittedTransaction = await client.Transaction.SignAndSubmitTransaction(multikeyAccount, transaction);
 
// 3. (Optional) Wait for the transaction to be committed
var committedTransaction = await client.Transaction.WaitForTransaction(submittedTransaction.Hash);

Additional Resources

MultiKeyAccount Reference →

The full API reference for the MultiKeyAccount class.

Keyless Accounts Basic Transactions