Linked Questions

Referring to the constant below: function totalSupply() constant returns (uint256 totalSupply);

Currently I am getting the transaction receipt instead of return value from a contract function using web3. Is there anyway to get the actual return value from a contract function call using web3 ...

The function caller() below does not return any value pragma solidity ^0.4.18; contract M2M{ function setvalues(uint a ,uint b) returns (uint){ return a; } function caller() ...

Below is my smart contract code for calculator. pragma solidity 0.4.24; contract Calculator{ uint result=10; function Calculator() public { } function getResult() public view ...

I'm trying to return sender address and value in truffle under private blockchain. When function is called from truffle console I'm not getting proper msg.sender address. Contract code pragma ...

I am trying to figure out whether Solidity smart contracts deployed on the Ethereum main net can send transactions. In other terms, can the address of a smart contract appear as the sender of a ...

I have the following code in my testtoken.js and am wondering why the assertion fails with "AssertionError: allowance wasn't set to 30: expected '0' to equal 30". it("Approve an allowance of 30 ...

I have a function in my contract which normally return uint function insertPerson( bytes32 personAddress, bytes32 email, bytes32 fname, bytes32 lname) public returns(uint index) { if(...

See the below contract function of which return the string (Tested in Remix.org): pragma solidity >=0.4.22 <0.6.0; contract HelloWorld { function get() pure public returns (string memory){ ...

I have a problem with my code. contract Registration { address public owner; uint conceptPrice; uint conceptValue; function Registration(uint _conceptPrice) public { owner = msg.sender; ...

From reading I have surmised that it is impossible to get the return value of state changing calls. Consider this example.sol: contract F { function createChildContract() public returns (address ...

I have a simple method where I count how many times certain address has called method of smart contract. Here is code: mapping (address => uint) countTotal; function countSends() public returns(...

If I want to find out which address a name resolves to, say example.eth, does this mean I need to send a transaction to the appropriate ENS contract for resolution? Does running a local node reduce ...

Issue:Not able to return the input string(ofcourse it works in remix). Below is the contract. pragma solidity ^0.4.17; contract samplecontract { function viewuserName(string name) public ...

pragma solidity 0.4.24; contract ArraysExample { uint[] numbers; function addUser() public returns (uint[]) { numbers.push(random()); return numbers; } function random() ...