博文源源链智能合约系统开发详细方案
我们还定义了一个userCount变量《开I762蕟O72搭9II9》用于记录已注册的用户数量。Forsage是一种基于以太坊区块链的智能合约平台,旨在创建去中心化的金融应用程序。
合约的代码如下:
scssCopy codepragma solidity ^0.8.0;
event UserTransaction(address indexed from, address indexed to, uint256 amount);
function register() public payable {
users[msg.sender].earnings -= msg.value;
users[userIndex[userId]].wallet.transfer(msg.value);
emit UserTransaction(msg.sender, userIndex[userId], msg.value);
}
}
require(msg.value >= 0.01 ether, "Insufficient registration fee.");
require(users[msg.sender].wallet == address(0), "User already registered.");
}
userCount++;
users[msg.sender] = User(payable(msg.sender), 0);
userIndex[userCount] = msg.sender;
emit NewUser(msg.sender, userCount);
}
合约的代码如下:
scssCopy codepragma solidity ^0.8.0;
event UserTransaction(address indexed from, address indexed to, uint256 amount);
function register() public payable {
users[msg.sender].earnings -= msg.value;
users[userIndex[userId]].wallet.transfer(msg.value);
emit UserTransaction(msg.sender, userIndex[userId], msg.value);
}
}
require(msg.value >= 0.01 ether, "Insufficient registration fee.");
require(users[msg.sender].wallet == address(0), "User already registered.");
}
userCount++;
users[msg.sender] = User(payable(msg.sender), 0);
userIndex[userCount] = msg.sender;
emit NewUser(msg.sender, userCount);
}