In this post, we will see how to resolve Declare constant at file level in solidity 0.4.17 Question: I need to declare a “global” constant that can be accessed by another contract. Given a very simple Solidity contract as follows: ...
In this post, we will see how to resolve How to resolve “ReferenceError: accounts is not defined at Suite” Question: When I run trufflle test, I get the following error message. ReferenceError: accounts is not defined at Suite. (/Users/tsuru/fundraiser/test/fundraiser_test.js:59:28) The ...
Question: enter image description hereI’ve installed latest version of visual studio with desktop development c++ workload but still they are asking for it when i try to install truffle. I entered command :npm install -g truffle and lot of messages ...
Question: I am looking for a way to create an automated test suite with Truffle that can test my smart contract’s interactions with Uniswap V2. The Uniswap docs briefly mention testing with Truffle but do not provide any examples. I ...
Question: am quite a beginner in solidity and I have been playing with truffle, When I send a transaction, I get a transaction log and one of the values is “tx”, the other labels are quite self explanatory but I ...
Question: I am trying to run this command on my Mac High Sierra (10.13.6) : npm install -g truffle But keep getting the following error: would appreciate any help if I can get. Thanks Answer: The above link indeed worked ...
Question: I’m using Truffle and upgradable Openzeppelin contracts. I have two contracts. Token.sol: AnotherContract.sol: How do I check how many MTK tokens a user has? I need to check it in doSomethingIfBalanceIsEnough function. Answer: The token contract implements a balanceOf() ...
Question: Type contract pSDATokenSale is not implicitly convertible to expected type contract pSDA. I am getting the error above ^^ at the line with tokenContract = _tokenContract;. Any suggestions as to why this is happening and how to fix it? ...
Question: I am trying to save gas by optimize code. In a flash, however, I was wondered what is the best practice of copying from array to array in Solidity. I present two option. One is copying by pointer (I ...
Question: I am trying to install Truffle on my mac M1. I started by following the instructions on the truffle web site in the Pet Shop tutorial I got node installed node successfully, but then I get this error… I ...