Contract Source Code:
File 1 of 1 : GOKU
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.15;
// Define interface for compliance with ERC20 standard
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Define contract for GOKU SUN token
contract GOKU is IERC20 {
string public constant name = "GOKU SUN";
string public constant symbol = "GOKU";
uint8 public constant decimals = 18;
uint public constant totalSupply = 50900000000 * 10**18;
mapping (address => uint) private _balances;
mapping (address => mapping (address => uint)) private _allowances;
constructor() {
_balances[msg.sender] = totalSupply;
}
function balanceOf(address account) public view override returns (uint) {
return _balances[account];
}
function allowance(address owner, address spender) public view override returns (uint) {
return _allowances[owner][spender];
}
function transfer(address recipient, uint amount) public override returns (bool) {
require(_balances[msg.sender] >= amount, 'ERR_OWN_BALANCE_NOT_ENOUGH');
require(msg.sender != recipient, 'ERR_SENDER_IS_RECEIVER');
_balances[msg.sender] -= amount;
_balances[recipient] += amount;
emit Transfer(msg.sender, recipient, amount);
return true;
}
function approve(address spender, uint amount) public override returns (bool) {
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public override returns (bool) {
require(_balances[sender] >= amount, 'ERR_FROM_BALANCE_NOT_ENOUGH');
require(_allowances[sender][msg.sender] >= amount, 'ERR_ALLOWANCE_NOT_ENOUGH');
_balances[sender] -= amount;
_allowances[sender][msg.sender] -= amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
return true;
}
}