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// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023.
pragma solidity ^0.4.12;
contract IMigrationContract {
function migrate(address addr, uint256 nas) returns (bool success);
}
contract SafeMath {
function safeAdd(uint256 x, uint256 y) internal returns(uint256) {
uint256 z = x + y;
assert((z >= x) && (z >= y));
return z;
}
function safeSubtract(uint256 x, uint256 y) internal returns(uint256) {
assert(x >= y);
uint256 z = x - y;
return z;
}
function safeMult(uint256 x, uint256 y) internal returns(uint256) {
uint256 z = x * y;
assert((x == 0)||(z/x == y));
return z;
}
}
contract Token {
uint256 public totalSupply; //代币总量
function balanceOf(address _owner) constant returns (uint256 balance);
function transfer(address _to, uint256 _value) returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
function approve(address _spender, uint256 _value) returns (bool success);
function allowance(address _owner, address _spender) constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract StandardToken is Token {
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
function transfer(address _to, uint256 _value) returns (bool success) {
if (balances[msg.sender] >= _value && _value > 0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else {
return false;
}
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else {
return false;
}
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
//JGO代币合约
contract JGOToken is StandardToken, SafeMath {
string public constant name = "laeerg"; //名称
string public constant symbol = "LAR"; //符号
uint256 public constant decimals = 9; //小数位
string public version = "1.0"; //版本
address public ethFundDeposit; //ETH存放地址
uint256 public currentSupply; //代币供应量
modifier isOwner() { require(msg.sender == ethFundDeposit); _; }
function formatDecimals(uint256 _value) internal returns (uint256 ) {
return _value * 10 ** decimals;
}
//JGO合约初始化函数(合约所有人地址, 当前供应量, 代币总量)
function JGOToken(address _ethFundDeposit, uint256 _totalSupply) {
ethFundDeposit = _ethFundDeposit;
currentSupply = formatDecimals(_totalSupply); //当前供应量
totalSupply = formatDecimals(_totalSupply); //代币总量
balances[msg.sender] = totalSupply;
if(currentSupply > totalSupply) throw;
}
} |