Integrate Keyless in Unity

LYNC Unity Keyless SDK on Aptos Ais a no-code Modular Unity SDK supporting PC (MacOS and Windows) and Mobile (Android and iOS) on Aptos.

Platform Supported: PC (Windows and MacOs) and Mobile (Android and iOS) Network Supported: Aptos Testnet and Mainnet

This release includes the following:

  • Keyless Login

  • Social Logins

  • Pontem Wallet Login

  • Custom Transactions using Keyless

  • Paymaster inbuilt to sponsor transactions for your users.

Get your API Key

Please get your API key before downloading the SDK from here


Download the LYNC Unity Aptos SDK from Here​

Example Project:

Import the SDK .unitypackage file to your project. or simply drag and drop .unitypackage file to your project.

Once the LYNC Aptos SDK package has finished importing into your Unity project, you can begin integrating it into your game.

The Folder structure looks like this

Integrating LYNC Aptos SDK in Unity

There is 1 Example Projects present in the SDK:


You can find the example scene in the folders. Simply pass the API key in LyncManager GameObject.

To test, Build and Run after adding this scene in (Scene in Build).

Setup the Project

To use LYNC Keyless Aptos SDK.

Attach LYNC Manager Prefab(Assets/LYNC-APTOS-SDK/LYNC Manager.prefab), on the starting scene. This will serve as the starting point for your project. In LYNC Manager Prefab, be sure to provide the following details:

  1. Choose Network -> Mainnet/ Testnet/ Devnet

  2. Sponsor Transactions -> If you want to sponsor transactions for users (Please contact LYNC)

  3. Login Options -> Allowing users to choose which login method to login from

  4. Pass a deep link name (example: lyncaptos/gameName etc.)

  5. Choosing keyless, will give an option to pass Client Id (Generated from Configure OIDC)

Integrating Login or Transaction Layer via LYNC Aptos SDK in Unity

The Sample Code for Login can be found at APTOSExample.cs.

Make sure to Import LYNC.

Example (Event Trigger):

LYNC ready Should be a function which has an argument of type "LyncManager"

LyncManager.onLyncReady += LyncReady;

private void LyncReady(LyncManager Lync)
        // Once LYNC is ready, you can do any steps like Login, Logout, Transactions etc.
        //To Login:
        Lync.WalletAuth.ConnectWallet((wallet) =>
        //To Logout:

To Check if the user is logged in or not:

using LYNC;

private AuthBase authBase;

    authBase = await AuthBase.LoadSavedAuth();
        if (authBase.WalletConnected)
            // User is Already Login
             // Ask user to login

On Wallet Connected (TypeOfLoginMethod)

//To OnWalletConnected(TypeOfLoginMethod):
        private void OnWalletConnected(AuthBase _authBase)
            if (AuthBase.AuthType == AUTH_TYPE.KEYLESS)
                var authData = _authBase as KeylessAuth;
                accountAddress.text = authData.PublicAddress;
                keylessPublicKey.text = authData.KeyPairPublicKey;
                keylessLoginDate.text = authData.LoginDate.ToString();

To Logout directly:


Transaction Flow

There are two methods for proceeding with a transaction:

  1. Gasless Transaction - Game Developer/ Game Studio will be sponsoring the transaction fee.

  2. User Paid Transaction- The Gamer/ User will be responsible for paying the gas fee and cost if any, required to do the transaction.

Gasless Transaction

To Enable Gasless Transactions or to Sponsor Transactions for your users, Set Sponsor Transactions as true, and contact LYNC team to setup your paymaster

To do transactions, APTOSExample.cs can be taken as a reference.

Pass in the Contract Address, Contract Name, Function Name and Network.

Arguments are not compulsory parameters, but if the function accepts any argument, make sure to pass them.


You can create a public Transaction Object, pass in the parameters and hit the function call where you want to do the transactions

public Transaction mintTxn;

TransactionResult txData = await LyncManager.Instance.TransactionsManager.SendTransaction(mintTxn);

if (txData.success)
    SuccessfulTransaction(txData.hash, "MINT");

Or You can create a Transaction Object,

public Transaction mintTxn;

//LyncManager.Instance.TransactionsManager.SendTransaction( new Transaction(ContractAddress, ContractName, FunctionName,ListOfArguments));

TransactionResult txData = await LyncManager.Instance.TransactionsManager.SendTransaction(
new Transaction("0x55db3f109405348dd4ce271dc92a39a6e1cbc3d78cf71f6bf128b1c8a9dfac33","tst_unity","set_data_bytes",arguments));

if (txData.success)
    SuccessfulTransaction(txData.hash, "MINT");

List of Arguments:

//    new TransactionArgument{ argument = value, type = ARGUMENT_TYPE.STRING }

List<TransactionArgument> arguments = new List<TransactionArgument>{
    new TransactionArgument{ argument = "0xb66b180422a4886dac85b8f68cc42ec1c6bafc824e196d437fdfd176192c25fccfc10e47777699420eec0c54a0176861a353a43dd45b338385e1b975709f2000", type = ARGUMENT_TYPE.STRING }

Some common bugs and their resolutions

Problem: Newtonsoft JSON is missing.

Solution: Please, Add this as a git URL in adding package


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