2D RPG Game

Build a 2D role-playing game in Unity using GamingKit!

Preview: Play the game!

How it works

Below, we'll outline the web3 features of the game enabled by GamingKit.

You can learn the features of the karting game itself from Unity Learn: Karting Template.

Smart Contracts

This game utilises three smart contracts to manage the in-game assets.

Contract	URL
Token Drop (Golden Apple Currency)	View Smart Contract
Edition (NFT Pots)	View Smart Contract
Marketplace (Buy Pots)	View Smart Contract

Connect Wallet

New users first connect their wallet to the game, this is achieved by:

1. Instantiating the SDK
2. Requesting the user to connect their wallet

using Thirdweb;
using System.Threading.Tasks;

public class DemoClass : MonoBehaviour
{
    // Store the sdk so we can use it in any method of this classjb
    private ThirdwebSDK sdk;

    void OnEnable()
    {
        // When this becomes active, instantiate the SDK
        sdk = new ThirdwebSDK("optimism-goerli");
    }

    // When the user clicks "Connect Wallet":
    // - Ask them to connect their wallet
    // - Ask them to switch to Optimism Goerli network
    public async Task<string> EnsureWalletState()
    {
        string address = await sdk.wallet.Connect();
        await sdk.wallet.SwitchNetwork(420);
        return address;
    }
}

Claiming ERC20 Tokens

Using the Token Drop smart contract, users can claim ERC20 tokens from the game.

We prompt the user to claim tokens upon completing the wizard's quest, by:

1. Connecting to the smart contract.
2. Calling the Claim function.

public Contract GetTokenDropContract()
{
    return sdk
        .GetContract("0x07E29106198B3b43Ada9A833Aee3e7CE74D38446");
}

public async Task<TransactionResult[]> Claim()
{
    var contract = GetTokenDropContract();
    await Connect();
    return await contract.ERC20.Claim("1");
}

Note: Users can claim from the contract directly in this example. In a real game, you'd need to check the user has won the game before allowing them to receive tokens.

Purchasing NFTs

We use the Marketplace smart contract to allow users to purchase NFTs from the game.

This is achieved by:

1. Connecting to the smart contract.
2. Calling the BuyListing function.

public Marketplace GetMarketplaceContract()
{
    return sdk
        .GetContract("0x641c81F8c10e2958F4e0c00882014c0A3A03f86A")
        .marketplace;
}
public async Task<TransactionResult> BuyItem(string itemId)
{
    await Connect();
    // itemId = ID of the listing on the marketplace, 1 = quantity to buy
    return await GetMarketplaceContract().BuyListing(itemId, 1);
}

Got Questions?

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