Free TON Solidity code or execution error. Can't understand my mistake, I already compact the code to the minimum: cat ./SimpleStorage.sol pragma solidity >=
I have few different options in the command line: fetch and start. What is the difference between them?
I would like to compute the sha256 of a string in a Free TON-Solidity contract, I do it by storing the string in a TvmBuilder and then passing it as a TvmSlice
I'm writing an NFT smart contract using the OpenZeppelin ERC721Full contract. I'm able to mint NFTs, but I want to have a button that enables them to be bought.
i have copied a contract from openzappline. but when i compile it on remix it gives me the error....that utils/context.sol is not found. here is the import prag
I try to run solidity coverage for testing test case and its coverage but when I run coverage command its give error like this : - command used (truffle run cov
I am using Hardhat hackathon boilerplate and calling my smart contract's (address 1c0, addresses shortened for clarity) function MyContract#addProduct from the
I have two contract, I write in in one file, named Sum.sol. The sum contract invoke Add contract. I just want to test cross-contract invoking. If I didn't put t
I have wrote the smart contract for creating ENS subdomain name. I need to pass the reference ETH address record for that created subdomain name. pragma sol
I am developing an NFT collection using ERC721 token. But I would like to know how a particular nft is held by a particular customer? I am sensing there are two
I want to know how OpenSea system read contract and call functions. So, I try to write a ERC721 contract without import any other code. // SPDX-License-Identifi
I am currently learning about NFTs and I reached the point where I deployed the contract and I can mint and everything going well. The only missing part is roya
I'm trying to complete the Dex level of ethernaut challenge which is quite easy. In order to use swap I need firstly to approve token allowance, but I don't und
I'm writing an ERC721A smart contract and getting a warning in the Remix IDE. There is the code: function tokenOfOwnerByIndex(address owner, uint256 index) pub
When I install all the dependencies but didn't get the "typechain" folder in the typescript hardhat. how to get it? npm init npm install --save-dev hardhat npx
How can I access smart contract calls with only the address of the contract? Correctly, I understand that the address will be enough, because with the help of i
If I were to deploy a smart contract for NFT's that I would want to sell which is the best way to do this. And is utilising Injected Web3 on Remix.ethereum.org
I am building an NFT smart contract with solidity, and I am trying to pass and Array of Structs into the constructor when I deploy the contract. However I am ge
When I try to test below project, it gets below error. Any thoughts why test fails, am I missing something? I am following 16 hours Solidity course of 'freecode
I'm getting this error in Solidity for the following code snippet: member balance not found or not visible after argument-dependent lookup in contract functio