I am completely new to this blockchain world so I want to try learn it. While I am following a tutorial to create a simple ERC-1155 contract to mint a ...
i make simple code, but have error "TypeError: Explicit type conversion not allowed from "uint256" to "address"." Can you help me? I even asked the gp ...
I create a game where users can get 'welcome' tokens for free. When they like to get another token (nft) from the game, it is only possible to mint wh ...
when i want to deploy this contract in REMIX IDE i get this error: Gas estimation errored with the following message (see below). The transaction exe ...
I was working on a NFT marketplace app using NextJS as frontend and Solidity as backend. When I tried to sell an NFT using the frontend UI, I encounte ...
I'm creating a web3.0 project where I need to know if the user has a specific token in their wallet to provide access to content. The collection was ...
I have an ERC721 contract that has a whitelistEnabled property which, if enabled, requires the user to pass a merkleproof to the minting function. Cur ...
showing invalid signature in documentation when we create NFT using HTS This is what am using to create the signature want to create NFT using HTS H ...
so I am building an nft marketplace and everything is good with creating nft .. etc but when attempting to buy an nft I get this error : ethers.um ...
i have completed my Solidity contract, which I want to use to upload a PDF/JPG file onto the Ethereum Blockchain. I just calculated the cost at around ...
When I try calling TokenBurnTransaction() with 37 NFT serials, I get a return error BATCH_SIZE_LIMIT_EXCEEDED. I am therefore wondering what is the ma ...
How OpenSea check available tokenIDS for SmartContact? Can i mint tokenID inconsistently? Example ID:1 and next ID:600 I ask this question, because I ...
I have an ERC-1155 smart contract deployed to the Goerli testnet. My contract inherits from the OpenZeppelin ERC1155 contract and uses its uri functio ...
I am working on an NFT Marketplace creation task with Truffle. For that, I am using an ERC4907 smart contract and trying to compile it. Following is m ...
I am trying to call a function from a Elrond Smart Contract to create a NFT, I am using their JavaScript SDK. This is the error I get: TransactionCo ...
I have two smart contracts (A, B), which are extended from ERC721. Is it possible to create a function in B to call setApprovalForAll on A from a user ...
Hi guys I'm using Hashlips [version: "1.1.1".] https://github.com/HashLips/hashlips_art_engine I'm using it with Node JS ,to generate a collection of ...
I'm trying to get the metadata from the NFT on hedera chain. When creating NFT the CID was converted to unit8array format but when I fetch the data th ...
everyone!! Can i change the picture after minitng at Opensea? Upload the image and json file to pinata. And after minting on Opensea, can I change th ...
I have a simplest nft code. My task is to take an array of buyers (wallet addresses) of this nft when it's minted and to pass it ((array) or them ((ad ...