Unity3d smartcontracts

In a similar way to the Nethereum smart contracts, Unity3d can use the contract deployment and function message definitions to interact with the blockchain.

using System.Collections;

using System.Collections.Generic;

using System.Numerics;

using Nethereum.ABI.FunctionEncoding.Attributes;

using Nethereum.ABI.Model;

using Nethereum.Contracts;

using Nethereum.Contracts.CQS;

using Nethereum.Contracts.Extensions;

using Nethereum.JsonRpc.UnityClient;

using UnityEngine;



public class TokenDeployAndSend : MonoBehaviour {



    //Deployment contract object definition



    public partial class EIP20Deployment : EIP20DeploymentBase

    {

        public EIP20Deployment() : base(BYTECODE) { }



        public EIP20Deployment(string byteCode) : base(byteCode) { }

    }



    public class EIP20DeploymentBase : ContractDeploymentMessage

    {



        public static string BYTECODE = "608060405234801561001057600080fd5b506040516107843803806107848339810160409081528151602080840151838501516060860151336000908152808552959095208490556002849055908501805193959094919391019161006991600391860190610096565b506004805460ff191660ff8416179055805161008c906005906020840190610096565b5050505050610131565b828054600181600116156101000203166002900490600052602060002090601f016020900481019282601f106100d757805160ff1916838001178555610104565b82800160010185558215610104579182015b828111156101045782518255916020019190600101906100e9565b50610110929150610114565b5090565b61012e91905b80821115610110576000815560010161011a565b90565b610644806101406000396000f3006080604052600436106100ae5763ffffffff7c010000000000000000000000000000000000000000000000000000000060003504166306fdde0381146100b3578063095ea7b31461013d57806318160ddd1461017557806323b872dd1461019c57806327e235e3146101c6578063313ce567146101e75780635c6581651461021257806370a082311461023957806395d89b411461025a578063a9059cbb1461026f578063dd62ed3e14610293575b600080fd5b3480156100bf57600080fd5b506100c86102ba565b6040805160208082528351818301528351919283929083019185019080838360005b838110156101025781810151838201526020016100ea565b50505050905090810190601f16801561012f5780820380516001836020036101000a031916815260200191505b509250505060405180910390f35b34801561014957600080fd5b50610161600160a060020a0360043516602435610348565b604080519115158252519081900360200190f35b34801561018157600080fd5b5061018a6103ae565b60408051918252519081900360200190f35b3480156101a857600080fd5b50610161600160a060020a03600435811690602435166044356103b4565b3480156101d257600080fd5b5061018a600160a060020a03600435166104b7565b3480156101f357600080fd5b506101fc6104c9565b6040805160ff9092168252519081900360200190f35b34801561021e57600080fd5b5061018a600160a060020a03600435811690602435166104d2565b34801561024557600080fd5b5061018a600160a060020a03600435166104ef565b34801561026657600080fd5b506100c861050a565b34801561027b57600080fd5b50610161600160a060020a0360043516602435610565565b34801561029f57600080fd5b5061018a600160a060020a03600435811690602435166105ed565b6003805460408051602060026001851615610100026000190190941693909304601f810184900484028201840190925281815292918301828280156103405780601f1061031557610100808354040283529160200191610340565b820191906000526020600020905b81548152906001019060200180831161032357829003601f168201915b505050505081565b336000818152600160209081526040808320600160a060020a038716808552908352818420869055815186815291519394909390927f8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925928290030190a350600192915050565b60025481565b600160a060020a03831660008181526001602090815260408083203384528252808320549383529082905281205490919083118015906103f45750828110155b15156103ff57600080fd5b600160a060020a038085166000908152602081905260408082208054870190559187168152208054849003905560001981101561046157600160a060020a03851660009081526001602090815260408083203384529091529020805484900390555b83600160a060020a031685600160a060020a03167fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef856040518082815260200191505060405180910390a3506001949350505050565b60006020819052908152604090205481565b60045460ff1681565b600160209081526000928352604080842090915290825290205481565b600160a060020a031660009081526020819052604090205490565b6005805460408051602060026001851615610100026000190190941693909304601f810184900484028201840190925281815292918301828280156103405780601f1061031557610100808354040283529160200191610340565b3360009081526020819052604081205482111561058157600080fd5b3360008181526020818152604080832080548790039055600160a060020a03871680845292819020805487019055805186815290519293927fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef929181900390910190a350600192915050565b600160a060020a039182166000908152600160209081526040808320939094168252919091522054905600a165627a7a7230582084c618322109054a21a57e27075384a6172ab854e4b2c2d35062a964a6bf593f0029";



        public EIP20DeploymentBase() : base(BYTECODE) { }



        public EIP20DeploymentBase(string byteCode) : base(byteCode) { }



        [Parameter("uint256", "_initialAmount", 1)]

        public BigInteger InitialAmount { get; set; }

        [Parameter("string", "_tokenName", 2)]

        public string TokenName { get; set; }

        [Parameter("uint8", "_decimalUnits", 3)]

        public byte DecimalUnits { get; set; }

        [Parameter("string", "_tokenSymbol", 4)]

        public string TokenSymbol { get; set; }



    }



    [Function("transfer", "bool")]

    public class TransferFunctionBase : FunctionMessage

    {

        [Parameter("address", "_to", 1)]

        public string To { get; set; }

        [Parameter("uint256", "_value", 2)]

        public BigInteger Value { get; set; }

    }



    public partial class TransferFunction : TransferFunctionBase

    {



    }



    [Function("balanceOf", "uint256")]

    public class BalanceOfFunction : FunctionMessage

    {

        [Parameter("address", "_owner", 1)]

        public string Owner { get; set; }

    }



    [FunctionOutput]

    public class BalanceOfFunctionOutput : IFunctionOutputDTO

    {

        [Parameter("uint256", 1)]

        public int Balance { get; set; }

    }



    [Event("Transfer")]

    public class TransferEventDTOBase : IEventDTO

    {



        [Parameter("address", "_from", 1, true)]

        public virtual string From { get; set; }

        [Parameter("address", "_to", 2, true)]

        public virtual string To { get; set; }

        [Parameter("uint256", "_value", 3, false)]

        public virtual BigInteger Value { get; set; }

    }



    public partial class TransferEventDTO : TransferEventDTOBase

    {

        public static EventABI GetEventABI()

        {

            return EventExtensions.GetEventABI<TransferEventDTO>();

        }

    }



    // Use this for initialization

    void Start () {

        StartCoroutine(DeployAndTransferToken());
    }





    //Sample of new features / requests

    public IEnumerator DeployAndTransferToken()

    {

        var url = "http://localhost:8545";

        var privateKey = "0xb5b1870957d373ef0eeffecc6e4812c0fd08f554b37b233526acc331bf1544f7";

        var account = "0x12890d2cce102216644c59daE5baed380d84830c";

        //initialising the transaction request sender

        var transactionRequest = new TransactionSignedUnityRequest(url, privateKey, account);


        var deployContract = new EIP20Deployment()

        {
            InitialAmount = 10000,

            FromAddress = account,

            TokenName = "TST",

            TokenSymbol = "TST"

        };

        //deploy the contract and True indicates we want to estimate the gas

        yield return transactionRequest.SignAndSendDeploymentContractTransaction<EIP20DeploymentBase>(deployContract);

        if (transactionRequest.Exception != null)

        {

            Debug.Log(transactionRequest.Exception.Message);

            yield break;

        }



        var transactionHash = transactionRequest.Result;



        Debug.Log("Deployment transaction hash:" + transactionHash);



        //create a poll to get the receipt when mined

        var transactionReceiptPolling = new TransactionReceiptPollingRequest(url);

        //checking every 2 seconds for the receipt

        yield return transactionReceiptPolling.PollForReceipt(transactionHash, 2);

        var deploymentReceipt = transactionReceiptPolling.Result;



        Debug.Log("Deployment contract address:" + deploymentReceipt.ContractAddress);



        //Query request using our acccount and the contracts address (no parameters needed and default values)

        var queryRequest = new QueryUnityRequest<BalanceOfFunction, BalanceOfFunctionOutput>(url, account);

        yield return queryRequest.Query(new BalanceOfFunction(){Owner = account}, deploymentReceipt.ContractAddress);



        //Getting the dto response already decoded

        var dtoResult = queryRequest.Result;

        Debug.Log(dtoResult.Balance);


        var transactionTransferRequest = new TransactionSignedUnityRequest(url, privateKey, account);


        var newAddress = "0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe";


        var transactionMessage = new TransferFunction

        {
            FromAddress = account,

            To = newAddress,

            Value = 1000,
        };


        yield return transactionTransferRequest.SignAndSendTransaction(transactionMessage, deploymentReceipt.ContractAddress);



        var transactionTransferHash = transactionTransferRequest.Result;



        Debug.Log("Transfer txn hash:" + transactionHash);



        transactionReceiptPolling = new TransactionReceiptPollingRequest(url);

        yield return transactionReceiptPolling.PollForReceipt(transactionTransferHash, 2);

        var transferReceipt = transactionReceiptPolling.Result;



        var transferEvent = transferReceipt.DecodeAllEvents<TransferEventDTO>();

        Debug.Log("Transferd amount from event: " + transferEvent[0].Event.Value);



        var getLogsRequest = new EthGetLogsUnityRequest(url);



        var eventTransfer = TransferEventDTO.GetEventABI();

        yield return getLogsRequest.SendRequest(eventTransfer.CreateFilterInput(deploymentReceipt.ContractAddress, account));



        var eventDecoded = getLogsRequest.Result.DecodeAllEvents<TransferEventDTO>();



        Debug.Log("Transferd amount from get logs event: " + eventDecoded[0].Event.Value);

    }

}