Created
December 27, 2019 19:22
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Require example in Solidity
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pragma solidity 0.5.12; | |
contract RequireExample{ | |
struct Person { | |
uint id; | |
string name; | |
uint age; | |
uint height; | |
bool senior; | |
} | |
address public owner; | |
constructor() public{ | |
owner = msg.sender; | |
} | |
mapping (address => Person) private people; | |
address[] private creators; | |
function createPerson(string memory name, uint age, uint height) public { | |
require(age < 150, "Age needs to be below 150"); | |
//This creates a person | |
Person memory newPerson; | |
newPerson.name = name; | |
newPerson.age = age; | |
newPerson.height = height; | |
if(age >= 65){ | |
newPerson.senior = true; | |
} | |
else{ | |
newPerson.senior = false; | |
} | |
insertPerson(newPerson); | |
creators.push(msg.sender); | |
} | |
function insertPerson(Person memory newPerson) private { | |
address creator = msg.sender; | |
people[creator] = newPerson; | |
} | |
function getPerson() public view returns(string memory name, uint age, uint height, bool senior){ | |
address creator = msg.sender; | |
return (people[creator].name, people[creator].age, people[creator].height, people[creator].senior); | |
} | |
function deletePerson(address creator) public { | |
require(msg.sender == owner, "Caller needs to be owner"); | |
delete people[creator]; | |
} | |
function getCreator(uint index) public view returns(address){ | |
require(msg.sender == owner, "Caller needs to be owner"); | |
return creators[index]; | |
} | |
} |
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