Questions tagged [require]

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Require not working on geth private node

I have created this contract to manage a votation: pragma solidity ^0.5.7; contract Votacion{ mapping(uint => address[]) private votosCandidatos; uint[] listaCandidatos; bool abierta; address ...
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1answer
290 views

Handling require/assert failure errors correctly from a Node.JS app?

I have a getter function in my smart contract that returns one of the string values in statically defined string array. Upon entry to the function, it does a bounds check on the incoming index using ...
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cannot get return variable(s) in javascript when using require in solidity

I have a function in solidity that returns a few bytes32 variables. I cannot for the life of me access those variables. Can someone please help? function getData() public returns (bytes32, bytes32, ...
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Catch a “require()” in frontend

I was trying to validate a transaction with some conditions on contract level and was wondering if it was possible in any way to give user feedback in the frontend if a require() fails - aka if it ...
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2answers
30 views

how to set a require for a string to not be null

I want to write a require condition for string that string variable could not be null. How to write because string is not taking the != operator function createOrder(address _seller, string memory ...
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61 views

Error message shown as [object Object] when use require, how to get actual error message string in Remix IDE Console?

I have used require function as: require(owner == msg.sender, "Sender must be owner"); But in the remix console I got, transact to Contract.setAdmin errored: [object Object] What should I ...
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14 views

require() statement to use for including Ganache GUI in the Dapp not Canache-cli

When using ganache-cli, we assign it using the require() statement. How do we do the same for ganache GUI? I don't want to use the ganache-cli for my app execution. Also how do I assign the provider ...
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1answer
165 views

ERROR: Web3 not defined

I'm trying to build a browser UI to interact with my Solidity smart contract that is deployed on my local Ganache blockchain. But I can't seem to get my index.html file to connect to Metamask. I keep ...
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1answer
114 views

Geth Node doesn't revert a transaction not satisfying a require

i'm testing my smart contract on remix with local ganache cli, when i try to test case that doesn't satisfy a require on the SC i correctly receive message "transact to Contract.function errored: VM ...