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  • Update NFT

This section lists the requests to get NFTs and make updates to them (example: adding a hat to a character).

Guided tutorial


GetNFTInfo

GetNFTInfo — retrieves details on a particular NFT specified by the body parameters.

Body Parameters

ParameterDescription
device_id (default)An ID of your device, generated and saved for further usage upon initialization.
contract_address (required)An address of the contract you perform operations by.
abi_hash (required)An ABI indicates the number of functions in the contract (represented in hash value).
tokenId (required)A token ID of the NFT you'd like to retrieve the details on.

Response

A data object providing the following information on the NFT:

ParameterDescription
tokenIdA token ID of the NFT.
itemTypeA type of the NFT.
strengthA strength property of the NFT.
levelA level property of the NFT.
expireTimeTime the NFT expires in.
signatureWhom the NFT belongs to.

Code Example

void UUpdateNFTExample::GetNFTInfo(FString abi_hash, int tokenId, FAnkrCallCompleteDynamicDelegate Result)
{
	http = &FHttpModule::Get();

#if ENGINE_MAJOR_VERSION == 5 || (ENGINE_MAJOR_VERSION == 4 && ENGINE_MINOR_VERSION >= 26)
	TSharedRef<IHttpRequest, ESPMode::ThreadSafe> Request = http->CreateRequest();
#else
	TSharedRef<IHttpRequest> Request = http->CreateRequest();
#endif
	Request->OnProcessRequestComplete().BindLambda([Result, this](FHttpRequestPtr Request, FHttpResponsePtr Response, bool bWasSuccessful)
	{
		const FString content = Response->GetContentAsString();
		UE_LOG(LogTemp, Warning, TEXT("UpdateNFTExample - GetNFTInfo - GetContentAsString: %s"), *content);

		TSharedPtr<FJsonObject> JsonObject;
		TSharedRef<TJsonReader<>> Reader = TJsonReaderFactory<>::Create(content);
			
		if (FJsonSerializer::Deserialize(Reader, JsonObject))
		{
			Result.ExecuteIfBound(content, content, "", -1, false);
		}
	});

	FString getTokenDetailsMethodName = "getTokenDetails";
	FString body = "{\"device_id\": \"" + deviceId + "\", \"contract_address\": \"" + ContractAddress + "\", \"abi_hash\": \"" + abi_hash + "\", \"method\": \"" + getTokenDetailsMethodName + "\", \"args\": \"" + FString::FromInt(tokenId) + "\"}";
	
	FString url = AnkrUtility::GetUrl() + ENDPOINT_CALL_METHOD;
	Request->SetURL(url);
	Request->SetVerb("POST");
	Request->SetHeader(CONTENT_TYPE_KEY, CONTENT_TYPE_VALUE);
	Request->SetContentAsString(body);
	Request->ProcessRequest();
}

UpdateNFT

UpdateNFT — changes NFT metadata on the blockchain. This request changes the current state of the blockchain and incurs gas fees to cover smart contract operations. Therefore, the request issues a ticket to be approved or rejected in MetaMask.

Body Parameters

ParameterDescription
device_id (default)An ID of your device, generated and saved for further usage upon initialization.
contract_address (required)An address of the contract you perform operations by.
abi_hash (required)An ABI indicates the number of functions in the contract (represented in hash value).
_item (required)An item structure that needs to be changed.

Response

A successful request issues a ticket to come to your MetaMask wallet. The ticket shows a transaction that needs validation on your side — either confirmation or rejection.

Code Example

void UUpdateNFTExample::UpdateNFT(FString abi_hash, FItemInfoStructure _item, FAnkrCallCompleteDynamicDelegate Result)
{
	http = &FHttpModule::Get();

#if ENGINE_MAJOR_VERSION == 5 || (ENGINE_MAJOR_VERSION == 4 && ENGINE_MINOR_VERSION >= 26)
	TSharedRef<IHttpRequest, ESPMode::ThreadSafe> Request = http->CreateRequest();
#else
	TSharedRef<IHttpRequest> Request = http->CreateRequest();
#endif
	Request->OnProcessRequestComplete().BindLambda([Result, this](FHttpRequestPtr Request, FHttpResponsePtr Response, bool bWasSuccessful)
	{
		const FString content = Response->GetContentAsString();
		UE_LOG(LogTemp, Warning, TEXT("UpdateNFTExample - UpdateNFT - GetContentAsString: %s"), *content);

		TSharedPtr<FJsonObject> JsonObject;
		TSharedRef<TJsonReader<>> Reader = TJsonReaderFactory<>::Create(content);
			
		if (FJsonSerializer::Deserialize(Reader, JsonObject))
		{
			FString ticket = JsonObject->GetStringField("ticket");
			Result.ExecuteIfBound(content, ticket, "", -1, false);

#if PLATFORM_ANDROID || PLATFORM_IOS
			FPlatformProcess::LaunchURL(session.GetCharArray().GetData(), NULL, NULL);
#endif
		}
	});

	AnkrUtility::SetLastRequest("UpdateNFT");

	AsyncTask(ENamedThreads::AnyBackgroundThreadNormalTask, [this, Request, abi_hash, _item]()
	{
		FItemInfoStructure item = _item;

		FRequestBodyStruct body{};
		body.device_id		  = deviceId;
		body.contract_address = ContractAddress;
		body.abi_hash		  = abi_hash;
		body.method			  = "updateTokenWithSignedMessage";
		body.args.Add(item);

		FString url = AnkrUtility::GetUrl() + ENDPOINT_SEND_TRANSACTION;
		Request->SetURL(url);
		Request->SetVerb("POST");
		Request->SetHeader(CONTENT_TYPE_KEY, CONTENT_TYPE_VALUE);
		Request->SetContentAsString(FRequestBodyStruct::ToJson(body));
		Request->ProcessRequest();
	});
}