Please while trying to transfer coin the transaction status said fail when I checked on the blockchain I saw an error stating that I tried transfer ...
I'm doing udemy course about solidity, and I have encounter this error in Foundry contract: Source "openzeppelin-contracts/contracts/token/ERC721/ERC ...
I want to build a smart contract function, which use caller's password as params. I have no knowledge about blockchain security, so I ask the followin ...
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 ...
Can anyone Explain me how uint variable accept address in this smart contract // SPDX-License-Identifier: Apache-2.0. pragma solidity ^0.6.12; libra ...
When i call the function details it gives me return only no. those i have mint , but i want { "9222111888" : "150", "9093164641" : "550", } ...
Can you help me explain below smart contract code I found on tomb finance, tomb.sol contract? // Initial distribution for the first 24h genesis pools ...
I'm learning how the Uniswapv2 contracts work but I can't seem to wrap my mind around the swap() function. Reference: https://github.com/Uniswap/v2-c ...
While attempting to fund me contract is tell me it encountered an error without specifying the error. I attempted to fund 0.1 eth through the fund fun ...
ChainLink automation enables conditional execution of smart contracts functions. However, when calling function from the smart contract, it is the Cha ...
All is good and work very well, but why when I need to call function requestTokens, only owner can have success on transaction while other address can ...
I tried to deploy following smart contracts but it fails with following message: The transaction has been reverted to the initial state. Note: ...
When creating this contract, line "_buyer.transfer(buyers[_buyer]);" generates an error " "send" and "transfer" are only available for objects of type ...
When I'm learning OpenZeppelin, I found its Ownable library has a function transferOwnership, which can give the owner of current contract to an addre ...
When creating a function that accepts an arguments like int, uint, string and so on why does it needs to specify that string is a memory but when pass ...
I've tackled a task: find a specific address in a sheet, move it to the end of the sheet, and remove it via a function pop! here is the code: ...
I'm learning solidity by official docs, one thing I'm not sure is that the address payable concept is only for contract address? Since I think the acc ...
How to check values of a variables and functions in solidity like javascript via console.log? Because i need visibility of results for deep understand ...
I used the following library code to delete an element in array according to its index. The only way in my mind is using loop, but it costs a lot of g ...
According to this doc. We can use ethers.getContract to get deployed contract. I have deployed my contract at 0x33F4623337b8F9EDc9529a79F0d68B2BeC98d ...