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MetamaskController.cs
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MetamaskController.cs
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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UIElements;
//using Nethereum.JsonRpc.UnityClient;
using System;
using Nethereum.Hex.HexTypes;
using System.Numerics;
using ERC721ContractLibrary.Contracts.ERC721PresetMinterPauserAutoId.ContractDefinition;
using Nethereum.Unity.Metamask;
using Nethereum.Unity.Contracts;
using Nethereum.Contracts;
using Nethereum.Unity.Contracts.Standards.ERC721;
using Nethereum.Contracts.Standards.ERC721;
using Nethereum.Unity.Utils.Drawing;
using Nethereum.Unity.Rpc;
using Nethereum.Metamask;
//Test external contract 0x345c2fa23160c63218dfaa25d37269f26c85ca47
//0x2002050e7084f5db6ac4e81d54fbb6b35c257592 address
//This is example uses coroutines, you can use the async await pattern if you prefer using the WebglThreadPatcher and vanilla Nethereum
//Check the https://github.com/Nethereum/Unity3dSampleTemplate for more examples using the async await pattern
public class MetamaskController : MonoBehaviour
{
private Button _btnMetamaskConnect;
private Button _btnDeployNFTContract;
private Button _btnViewNFTs;
private Button _btnMintNFT;
private Label _lblAccountSelected;
private Label _lblError;
private ListView _lstViewNFTs;
private TextField _txtSmartContractAddress;
private string _selectedAccountAddress; // = "0x12890D2cce102216644c59daE5baed380d84830c";
private bool _isMetamaskInitialised= false;
private BigInteger _currentChainId; //444444444500;
private string _currentContractAddress; // = "0x32eb97b8ad202b072fd9066c03878892426320ed";
void Start()
{
var root = GetComponent<UIDocument>().rootVisualElement;
_lblAccountSelected = root.Q<Label>("lbl-account-selected");
_btnMetamaskConnect = root.Q<Button>("metamask-button");
_txtSmartContractAddress = root.Q<TextField>("txt-smartContract-Address");
_lstViewNFTs = root.Q<ListView>("lst-nfts");
_btnViewNFTs = root.Q<Button>("btn-list-nfts");
_btnMintNFT = root.Q<Button>("btn-mint-nft");
_lblError = root.Q<Label>("lbl-error");
_btnDeployNFTContract = root.Q<Button>("btn-deploy-nft");
_btnMetamaskConnect.clicked += MetamaskConnectButton_Clicked;
_btnDeployNFTContract.clicked += _btnDeployNFTContract_clicked;
_btnMintNFT.clicked += _btnMintNFT_clicked;
_btnViewNFTs.clicked += _btnViewNFTs_clicked;
}
private void _btnViewNFTs_clicked()
{
StartCoroutine(GetAllNFTImages());
}
private void _btnMintNFT_clicked()
{
StartCoroutine(MintNFT());
}
public bool IsWebGL()
{
#if UNITY_WEBGL && !UNITY_EDITOR
return true;
#else
return false;
#endif
}
public IEnumerator MintNFT()
{
var contractTransactionUnityRequest = GetContractTransactionUnityRequest();
if (contractTransactionUnityRequest != null)
{
var mintFunction = new MintFunction() { To = _selectedAccountAddress };
yield return contractTransactionUnityRequest.SignAndSendTransaction<MintFunction>(mintFunction, _currentContractAddress);
if(contractTransactionUnityRequest.Exception == null)
{
print(contractTransactionUnityRequest.Result);
}
else
{
DisplayError(contractTransactionUnityRequest.Exception.Message);
}
}
}
public IEnumerator GetAllNFTImages()
{
try
{
_lstViewNFTs.hierarchy.Clear();
}
catch { }
var nftsOfUser = new NFTsOfUserUnityRequest(_selectedAccountAddress, GetUnityRpcRequestClientFactory());
yield return nftsOfUser.GetAllMetadataUrls(_currentContractAddress, _selectedAccountAddress);
if (nftsOfUser.Exception != null)
{
DisplayError(nftsOfUser.Exception.Message);
yield break;
}
Debug.LogWarning(nftsOfUser.Result.Count);
if (nftsOfUser.Result != null)
{
var metadataUnityRequest = new NftMetadataUnityRequest<NftMetadata>();
yield return metadataUnityRequest.GetAllMetadata(nftsOfUser.Result);
if (metadataUnityRequest.Exception != null)
{
DisplayError(metadataUnityRequest.Exception.Message);
yield break;
}
if (metadataUnityRequest.Result != null)
{
foreach (var item in metadataUnityRequest.Result)
{
var image = new Image();
_lstViewNFTs.hierarchy.Add(image);
Debug.LogWarning(item.Image);
StartCoroutine(DownloadAndSetImageTexture(item.Image, image));
}
}
}
}
private IEnumerator DownloadAndSetImageTexture(string imagePath, Image image)
{
var imagedownloader = new ImageDownloaderTextureAssigner();
yield return imagedownloader.DownloadAndSetImageTexture(imagePath, image);
if (imagedownloader.Exception != null)
{
DisplayError(imagedownloader.Exception.Message);
}
}
private void _btnDeployNFTContract_clicked()
{
StartCoroutine(DeploySmartContract());
}
private IEnumerator DeploySmartContract()
{
var contractTransactionUnityRequest = GetContractTransactionUnityRequest();
if (contractTransactionUnityRequest != null)
{
var erc721PresetMinter = new ERC721PresetMinterPauserAutoIdDeployment()
{
BaseURI = "https://my-json-server.typicode.com/juanfranblanco/samplenftdb/tokens/", //This is a simple example using a centralised server.. use ipfs etc for a proper decentralised immutable
Name = "NFTArt",
Symbol = "NFA"
};
yield return contractTransactionUnityRequest.SignAndSendDeploymentContractTransaction<ERC721PresetMinterPauserAutoIdDeployment>(erc721PresetMinter);
if (contractTransactionUnityRequest.Exception == null)
{
yield return GetDeploymentSmartContractAddressFromReceipt(contractTransactionUnityRequest.Result);
}
else
{
DisplayError(contractTransactionUnityRequest.Exception.Message);
}
}
}
private IEnumerator GetDeploymentSmartContractAddressFromReceipt(string transactionHash)
{
print(transactionHash);
//create a poll to get the receipt when mined
var transactionReceiptPolling = new TransactionReceiptPollingRequest(GetUnityRpcRequestClientFactory());
//checking every 2 seconds for the receipt
yield return transactionReceiptPolling.PollForReceipt(transactionHash, 2);
var deploymentReceipt = transactionReceiptPolling.Result;
_currentContractAddress = deploymentReceipt.ContractAddress;
_txtSmartContractAddress.value = deploymentReceipt.ContractAddress;
print(_currentContractAddress);
}
private void MetamaskConnectButton_Clicked()
{
_lblError.visible = false;
if (IsWebGL())
{
if (MetamaskWebglInterop.IsMetamaskAvailable())
{
MetamaskWebglInterop.EnableEthereum(gameObject.name, nameof(EthereumEnabled), nameof(DisplayError));
}
else
{
DisplayError("Metamask is not available, please install it");
}
}
}
public void EthereumEnabled(string addressSelected)
{
if (IsWebGL())
{
if (!_isMetamaskInitialised)
{
MetamaskWebglInterop.EthereumInit(gameObject.name, nameof(NewAccountSelected), nameof(ChainChanged));
MetamaskWebglInterop.GetChainId(gameObject.name, nameof(ChainChanged), nameof(DisplayError));
_isMetamaskInitialised = true;
}
NewAccountSelected(addressSelected);
}
}
public void ChainChanged(string chainId)
{
print(chainId);
_currentChainId = new HexBigInteger(chainId).Value;
try
{
//simple workaround to show suported configured chains
print(_currentChainId.ToString());
StartCoroutine(GetBlockNumber());
}
catch(Exception ex)
{
DisplayError(ex.Message);
}
}
public void NewAccountSelected(string accountAddress)
{
_selectedAccountAddress = accountAddress;
_lblAccountSelected.text = accountAddress;
_lblAccountSelected.visible = true;
}
public void DisplayError(string errorMessage)
{
_lblError.text = errorMessage;
_lblError.visible = true;
}
private IEnumerator GetBlockNumber()
{
var blockNumberRequest = new EthBlockNumberUnityRequest(GetUnityRpcRequestClientFactory());
yield return blockNumberRequest.SendRequest();
print(blockNumberRequest.Result.Value);
}
public IUnityRpcRequestClientFactory GetUnityRpcRequestClientFactory()
{
if (IsWebGL())
{
if (MetamaskWebglInterop.IsMetamaskAvailable())
{
return new MetamaskWebglCoroutineRequestRpcClientFactory(_selectedAccountAddress, null, 1000);
}
else
{
DisplayError("Metamask is not available, please install it");
return null;
}
}
else
{
_selectedAccountAddress = "0x12890D2cce102216644c59daE5baed380d84830c";
return new UnityWebRequestRpcClientFactory("http://localhost:8545");
}
}
public IContractTransactionUnityRequest GetContractTransactionUnityRequest()
{
if (IsWebGL())
{
if (MetamaskWebglInterop.IsMetamaskAvailable())
{
return new MetamaskTransactionCoroutineUnityRequest(_selectedAccountAddress, GetUnityRpcRequestClientFactory());
}
else
{
DisplayError("Metamask is not available, please install it");
return null;
}
}
else
{
//this uses the "Nethereum" test account and chainId.. change to your own if needed
_selectedAccountAddress = "0x12890D2cce102216644c59daE5baed380d84830c";
return new TransactionSignedUnityRequest("http://localhost:8545", "0xb5b1870957d373ef0eeffecc6e4812c0fd08f554b37b233526acc331bf1544f7", 444444444500);
}
}
// Update is called once per frame
void Update()
{
}
}