ERC20FixedSupply.md

MintCoin崔棉大师的花式发币法

固定总量代币

固定总量代币是最基础的ERC20代币,包含了代币名称,代币缩写,精度和发型总量四个基本信息.

合约文件: ERC20FixedSupply.sol

测试脚本: ERC20FixedSupply.js

布署脚本: 2_deploy_ERC20FixedSupply.js

在布署合约时定义以下变量

string memory name,     //代币名称
string memory symbol,   //代币缩写
uint8 decimals,         //精度
uint256 totalSupply     //发行总量

调用方法

//返回代币名称
name() public view returns (string memory)
//返回代币缩写
symbol() public view returns (string memory)
//返回代币精度
decimals() public view returns (uint8)
//返回发行总量
totalSupply() external view returns (uint256)
//返回指定地址的余额
balanceOf(address account) external view returns (uint256)
//发送代币,从当前账户发送到指定地址
transfer(address recipient, uint256 amount) external returns (bool)
//查询owner给予spender的配额
allowance(address owner, address spender) external view returns (uint256)
//批准spender代表发送者使用amount数量的代币
approve(address spender, uint256 amount) external returns (bool)
//spender调用这个函数发送sender账户中的amount数量的代币给recipient
transferFrom(address sender, address recipient, uint256 amount) external returns (bool)
//增加给予spender的配额
increaseAllowance(address spender, uint256 addedValue) public returns (bool)
//减少给予spender的配额
decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool)