Struicture of a Contract

Struicture of a Contract

Contract can inherit from other contracts.

State Variables

Permanently stored in contract storage.

contract SimpleStorage {

uint storedData;

}

Functions

contract SimpleAuction{

function bid() public payable{

}

}

Function Modifiers

contract Purchase {

modifier onlySeller(){

}

function abort() public onlySeller {

}

}

Events

contract SimpleAuction {

event HigestBidIncreased(); //선언만 하고 구현은 다른 곳에서

function bid() public payable {

emit HigestBidIncreased();

}

}

Struct Types

contract Ballot {

struct Voter {

uint weight;

bool voted;

address delegate;

uint vote;

}

}

Enum Types

contract Purchase {

enum State { Created, Locked, Inactive } //Created는 어떤 상태를 나타내지 값을 갖는 변수가 아니다.

}