马蹄链智能合约系统DAPP开发源码实例分析

以下是一个简单的马蹄链智能合约系统的开发源码demo，它实现了一个简单的 Token 资产发行功能：

pragma solidity ^0.8.0;

contract Owned {
address public owner;

function Owned() {  
    owner = msg.sender;  
}  

modifier onlyOwner() {  
    require(msg.sender == owner, "Only owner can call this function");  
    _;  
}  

}

contract Token {
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
uint256 public balanceOf;
mapping (address => uint256) balances;

constructor() {  
    name = "My Token";  
    symbol = "MTN";  
    decimals = 18;  
    totalSupply = 1000000;  
}  

function balanceOf(address _owner) public view returns (uint256) {  
    return balances[_owner];  
}  

function transfer(address _to, uint256 _value) public onlyOwner {  
    require(balances[owner] >= _value, "Insufficient funds");  
    balances[owner] -= _value;  
    balances[_to] += _value;  
    emit Transfer(owner, _to, _value);  
}  

}