Collection Details
Namespace:
cryptojing
Dataset:
Collection:
cryptojing
Owner:
0x5d9c5c3192dbcc66c84908cb1677cee5ab2a1086
Transaction:
Timestamp:
Nov.25.2023 02:13:43 AM
Status:
OnChain
Collection Documents
| _id | JING1 | description | external_url | image | name | View |
|---|---|---|---|---|---|---|
2347b22244d7f1b57aad53d680bdea366ad1b70063e1aabce1634bc7d8e083c95 | cryptojing | https://glacier.io/ | https://raw.githubusercontent.com/Glacier-Labs/resource/main/nft1.jpg | cryptojing | View | |
2347b22244d7f1b57aad53d680bdea366ad1b70063e1aabce1634bc7d8e083c94 | cryptojing | https://glacier.io/ | https://raw.githubusercontent.com/Glacier-Labs/resource/main/nft1.jpg | cryptojing | View | |
2347b22244d7f1b57aad53d680bdea366ad1b70063e1aabce1634bc7d8e083c93 | // SPDX-License-Identifier: MIT
// WTF Solidity by 0xAA
pragma solidity ^0.8.4;
interface IERC20 {
/**
* @dev 释放条件：当 `value` 单位的货币从账户 (`from`) 转账到另一账户 (`to`)时.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev 释放条件：当 `value` 单位的货币从账户 (`owner`) 授权给另一账户 (`spender`)时.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev 返回代币总供给.
*/
function totalSupply() external view returns (uint256);
/**
* @dev 返回账户`account`所持有的代币数.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev 转账 `amount` 单位代币，从调用者账户到另一账户 `to`.
*
* 如果成功，返回 `true`.
*
* 释放 {Transfer} 事件.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev 返回`owner`账户授权给`spender`账户的额度，默认为0。
*
* 当{approve} 或 {transferFrom} 被调用时，`allowance`会改变.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev 调用者账户给`spender`账户授权 `amount`数量代币。
*
* 如果成功，返回 `true`.
*
* 释放 {Approval} 事件.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev 通过授权机制，从`from`账户向`to`账户转账`amount`数量代币。转账的部分会从调用者的`allowance`中扣除。
*
* 如果成功，返回 `true`.
*
* 释放 {Transfer} 事件.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}
contract ERC20 is IERC20 {
mapping(address => uint256) public override balanceOf;
mapping(address => mapping(address => uint256)) public override allowance;
uint256 public override totalSupply; // 代币总供给
string public name; // 名称
string public symbol; // 符号
uint8 public decimals = 18; // 小数位数
address public owner;
// @dev 在合约部署的时候实现合约名称和符号
constructor(string memory name_, string memory symbol_){
name = name_;
symbol = symbol_;
owner = msg.sender;
}
// @dev 实现`transfer`函数，代币转账逻辑
function transfer(address recipient, uint amount) external override returns (bool) {
balanceOf[msg.sender] -= amount;
balanceOf[recipient] += amount;
emit Transfer(msg.sender, recipient, amount);
return true;
}
// @dev 实现 `approve` 函数, 代币授权逻辑
function approve(address spender, uint amount) external override returns (bool) {
allowance[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
// @dev 实现`transferFrom`函数，代币授权转账逻辑
function transferFrom(
address sender,
address recipient,
uint amount
) external override returns (bool) {
allowance[sender][msg.sender] -= amount;
balanceOf[sender] -= amount;
balanceOf[recipient] += amount;
emit Transfer(sender, recipient, amount);
return true;
}
// @dev 铸造代币，从 `0` 地址转账给 调用者地址
function mint(uint amount) external {
require(owner == msg.sender);
balanceOf[msg.sender] += amount;
totalSupply += amount;
emit Transfer(address(0), msg.sender, amount);
}
// @dev 销毁代币，从 调用者地址 转账给 `0` 地址
function burn(uint amount) external {
balanceOf[msg.sender] -= amount;
totalSupply -= amount;
emit Transfer(msg.sender, address(0), amount);
}
} | View | ||||
2347b22244d7f1b57aad53d680bdea366ad1b70063e1aabce1634bc7d8e083c92 | https://twitter.com/enriquemyro1/status/1627934936090185728 | View | ||||
2347b22244d7f1b57aad53d680bdea366ad1b70063e1aabce1634bc7d8e083c91 | https://twitter.com/enriquemyro1/photo | View |