Ethereum Unity3D Boilerplate Questions

Moralis General
#457

you should be able to use the snippets i sent to transfer nft, you can use an nft abi, then call the transfer function on the abi (it might have a different name) and then pass in the parameters and it will work as planned.

Note that the sending of custom erc is not unique , you can change the contract address and amount, to send any amount of any token on that chain by calling a a general erc20 contract function in the abi (the abi is in the code, i commented it out).
i have given a layout to be ablle to call smart contract functions, you can try it out and test if for your different functions.

#458

Hi,

Not sure what I might be doing wrong, but I’m trying to implement a LiveQuery on a custom object. I have a custom PlayerData object / database table that I want to monitor. I’m calling the below code in a function but I am not receiving any event callbacks.

I’m currently use this PlayerData object to successfully store / retrieve values from the Moralis DB & have had no issues there, just can’t seem to get any output from the callbacks when there is a modification to the table and / or the data in it.

Thanks!

        var query = await MoralisInterface.GetClient().Query<PlayerData>();

        MoralisLiveQueryCallbacks<PlayerData> callbacks = new MoralisLiveQueryCallbacks<PlayerData>();

        callbacks.OnConnectedEvent += (() => { Console.WriteLine("Connection Established."); });
        callbacks.OnSubscribedEvent += ((requestId) => { Console.WriteLine($"Subscription {requestId} created."); });
        callbacks.OnUnsubscribedEvent += ((requestId) => { Console.WriteLine($"Unsubscribed from {requestId}."); });
        callbacks.OnErrorEvent += ((ErrorMessage em) =>
        {
            Console.WriteLine($"***** ERROR: code: {em.code}, msg: {em.error}, requestId: {em.requestId}");
        });
        callbacks.OnCreateEvent += ((item, requestId) =>
        {
            Console.WriteLine($"***** Created");
        });
        callbacks.OnUpdateEvent += ((item, requestId) =>
        {
            Console.WriteLine($"***** Updated");
        });
        callbacks.OnDeleteEvent += ((item, requestId) =>
        {
            Console.WriteLine($"***** Deleted");
        });
        callbacks.OnGeneralMessageEvent += ((text) =>
        {
            Console.WriteLine($"***** Websocket message: {text}");
        });

        MoralisLiveQueryController.AddSubscription<PlayerData>("PlayerData", query, callbacks);
1 Like
#459

Using Unity remote how can I use Deep linking ?

1 Like
#460

yes it should support deep linking

#461

are you sure Console.WriteLine displays on the unity console, you can try testing it ?
if it doesn’t , you can try print() or Debug.log()

2 Likes
#462

@jcm, @0xprof is correct. Instead of Console.log use Debug.Log.

I just updated the README.md for this. Sorry about the confusion. I copied that block of code straight from my integrated test case.

David

1 Like
#463

Hello, the Wallet Connect code does use deep linking for mobile wallet connections. You do not need to setup this up yourself.

#464

@Shivam and @0xprof,

Yes this was working as of a week ago on Android. I will double check to make sure it is still fine.

David

#465

NftOwnerCollection balance = await MoralisInterface.GetClient().Web3Api.Account.GetNFTsForContract(address.ToLower(), tokenAddress, ChainList.eth);

I am getting this error “ApiException: Error calling GetNFTsForContract: Object reference not set to an instance of an object” only on android, it’s working fine on editor.

Details :
E Unity : ApiException: Error calling GetNFTsForContract: Object reference not set to an instance of an object
E Unity : at Moralis.Web3Api.CloudApi.AccountApi.GetNFTsForContract (System.String address, System.String tokenAddress, Moralis.Web3Api.Models.ChainList chain, System.String format, System.Nullable1[T] offset, System.Nullable1[T] limit) [0x00321] in F:\NewGame\Assets\MoralisWeb3ApiSdk\Moralis\Moralis.Web3Api\CloudApi\AccountApi.cs:446
Unity : at SwordNFT.MoralisTest () [0x00179] in F:\NewGame\Assets\Scripts\SwordNFT.cs:262
E Unity : at System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.b__7_0 (System.Object state) [0x00000] in <57faacfd2e7144baaa50d26ab4b3b712>:0
E Unity : at UnityEngine.UnitySynchronizationContext+WorkRequest.Invoke () [0x00002] in /Users/bokken/buildslave/unity/build/Runtime/Export/Scripting/UnitySynchronizationContext.cs:153
E Unity : at UnityEngine.UnitySynchronizationContext.Exec () [0x00056] in /Users/bokken/buildslave/unity/build/Runtime/Export/Scripting/UnitySynchroniz

1 Like
#466

Arf the struggle is real with ERC1155 haha sorry.

this is my code, trying to use the standard SafeTransferFrom function from the ERC1155 standard:

public string ABINft;

    public async void SendErc1155()
    {
        
        
        MoralisInterface.InsertContractInstance("1155NFT", ABINft, "mumbai", erc1155Address);
        // Set gas estimate
        HexBigInteger gas = new HexBigInteger(80000);

        object[] pars = { senderAccount, receiverAccount, 2, 1, 0 };

        // Call the contract to claim the NFT reward.
        string resp = await MoralisInterface.SendEvmTransactionAsync("1155NFT", "mumbai", "safeTransferFrom", senderAccount, gas, new HexBigInteger("0x0"), pars);
        print(resp);
    }

where 2 is the ID of the NFT, 1 the amount and 0 the data like such in Remix:

Capture d’écran 2022-03-03 à 12.59.04
Capture d’écran 2022-03-03 à 12.59.04532×524 17.1 KB

my error : “Evm Transaction failed: byte[] value expected for type ‘bytes’”

same error when I try to declare a variable of type:

byte b = 0;

I feel I’m on the verge of making it work…

1 Like
#467

Hi fam,

Thanks for your amazing work !

creating a marketplace where people could buy displayed ERC1155 NFTs with specific ERC20 tokens.

I couldn’t find a working solution for that.
Do you have any direction for that ?
For now, I managed to:

  • authentificate
  • show custom token balance
  • send custom token to specific address
  • show owned nfts

Thanks in advance.

1 Like
#469

Trying it myself …

It worked for me. From Android Studio log:

2022-03-03 07:48:17.540 13840-13871/com.DefaultCompany.v108 I/Unity: Already Owns Mug.
    UnityEngine.StackTraceUtility:ExtractStackTrace () (at /Users/bokken/buildslave/unity/build/Runtime/Export/Scripting/StackTrace.cs:37)
    UnityEngine.DebugLogHandler:LogFormat (UnityEngine.LogType,UnityEngine.Object,string,object[])
    UnityEngine.Logger:Log (UnityEngine.LogType,object)
    UnityEngine.Debug:Log (object)
    AwardableController/<Update>d__6:MoveNext () (at F:/projects/unity/v108/Assets/MoralisWeb3ApiSdk/Example/Scripts/AwardableController.cs:101)

This debug statement only happens if the Web3Api call returns and the result contains the target TokenId

Since you are using custom code in the sample you sent:

  1. is address non-null?
  2. Is tokenAddress non-null?
  3. Has MoralisInterface been initialized prior to calling your test method?
#470

Are you creating this using Unity for game?

#471

ok, there should be two safeTransferFrom function :thinking: ?
i saw two on erc 721, i took the parameter byte with the other normal parameters, the other one did not take it but took the other normal parameters

#472

There is only one …
There is one called safeBatchTransferFrom, but takes in the same inputs…

#473

I made this test method and it worked for me:

   public async static Task TransferNft()
    {
        // Need the user for the wallet address
        MoralisUser user = await MoralisInterface.GetUserAsync();

        string addr = user.authData["moralisEth"]["id"].ToString();

        BigInteger bi = 0;

        if (BigInteger.TryParse(Constants.MUG_TOKEN_ID, out bi))
        {
            // Convert token id to hex as this is what the contract call expects
            object[] pars = new object[] { 
                // from
                addr, 
                // to
                "0xc539a39719Ad4D2DE7bf6f1e16F86383B6FF59C6", 
                // Token Id
                bi.ToString(),
                // Amount (count)
                (new HexBigInteger(1)).ToString(),
                // data
                new byte[] {0}
            };

            // Set gas estimate
            HexBigInteger gas = new HexBigInteger(30000);

            try
            {
                // Call the contract to transfer the NFT.
                string resp = await MoralisInterface.SendEvmTransactionAsync("Rewards", "mumbai", "safeTransferFrom", addr, gas, new HexBigInteger("0x0"), pars);

                Debug.Log($"$Send Transaction respo: {resp}");
            }
            catch (Exception exp)
            {
                Debug.Log($"Send transaction failed: {exp.Message}");
            }
        }
    }

This is non-WebGL

2 Likes
#474

Yes I am :slight_smile:

1 Like
#475

Yeayyy this worksss !! Thanks x1000 @dgoodrich and @0xprof.
Made my day.

Just a note:
Why does the nft still appears on my metamask app like I still own it ?
Is this coming from them ?

Thanks again for your amazing support guys.

#476

Double check using the etherscan associated with the chain you are targeting and look at the transactions for you wallet.

Did the transaction actually succeed? If so I do not know why metamask still shows that address still owns the NFT.

also try logging out and into the wallet to see if that clears it up .

#477

Oh yes I’m sure it did go through ! Thanks!!
It’s showing well on polygonscan, so probably just metamask being metamask :slight_smile:

image
image1170×733 94 KB

Curious why it doesn’t show who the receiver is. Thinking it’s probably just mumbai polygonscan

1 Like