2_崔迪_第六课作业

Lesson-6/README.md

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+## 硅谷live以太坊智能合约频道官方地址
+
+### 第六课

Lesson-6/assignment/Payroll.sol

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+pragma solidity ^0.4.14;
+
+import './SafeMath.sol';
+import './Ownable.sol';
+
+contract Payroll is Ownable {
+    using SafeMath for uint;
+    struct Employee {
+        address id;
+        uint salary;
+        uint lastPayday;
+    }
+
+    uint constant payDuration = 10 seconds;
+
+    uint totalSalary;
+    uint totalEmployee;
+    address[] employeeList;
+    mapping(address => Employee) public employees;
+
+    event NewEmployee(
+        address employee
+    );
+
+    event UpdateEmployee(
+        address employee
+    );
+
+    event RemoveEmployee(
+        address employee
+    );
+
+    event NewFund(
+        uint balance
+    );
+
+    event GetPaid(
+        address employee
+    );
+
+    modifier employeeExit(address employeeId) {
+        var employee = employees[employeeId];
+        assert(employee.id != 0x0);
+        _;
+    }
+
+    function _partialPaid(Employee employee) private {
+        uint payment = employee.salary
+            .mul(now.sub(employee.lastPayday))
+            .div(payDuration);
+        employee.id.transfer(payment);
+    }
+
+    function checkEmployee(uint index) returns (address employeeId, uint salary, uint lastPayday) {
+        employeeId = employeeList[index];
+        var employee = employees[employeeId];
+        salary = employee.salary;
+        lastPayday = employee.lastPayday;
+    }
+
+    function addEmployee(address employeeId, uint salary) onlyOwner {
+        var employee = employees[employeeId];
+        assert(employee.id == 0x0);
+
+        employees[employeeId] = Employee(employeeId, salary.mul(1 ether), now);
+        totalSalary = totalSalary.add(employees[employeeId].salary);
+        totalEmployee = totalEmployee.add(1);
+        employeeList.push(employeeId);
+
+        NewEmployee(employeeId);
+    }
+
+    function removeEmployee(address employeeId) onlyOwner employeeExit(employeeId) {
+        var employee = employees[employeeId];
+
+        _partialPaid(employee);
+        totalSalary = totalSalary.sub(employee.salary);
+        delete employees[employeeId];
+        totalEmployee = totalEmployee.sub(1);
+
+        for(uint i = 0; i < employeeList.length; i++){
+            if(employeeList[i] == employeeId) {
+                delete employeeList[i];
+                employeeList[i] = employeeList[employeeList.length - 1];
+            }
+        }
+
+        RemoveEmployee(employeeId);
+    }
+
+    function updateEmployee(address employeeId, uint salary) onlyOwner employeeExit(employeeId) {
+        var employee = employees[employeeId];
+
+        _partialPaid(employee);
+        totalSalary = totalSalary.sub(employee.salary);
+        employee.salary = salary.mul(1 ether);
+        employee.lastPayday = now;
+        totalSalary = totalSalary.add(employee.salary);
+
+        UpdateEmployee(employeeId);
+    }
+
+    function addFund() payable returns (uint) {
+        return this.balance;
+    }
+
+    function calculateRunway() returns (uint) {
+        return this.balance.div(totalSalary);
+    }
+
+    function hasEnoughFund() returns (bool) {
+        return calculateRunway() > 0;
+    }
+
+    function getPaid() employeeExit(msg.sender) {
+        var employee = employees[msg.sender];
+
+        uint nextPayday = employee.lastPayday.add(payDuration);
+        assert(nextPayday < now);
+
+        employee.lastPayday = nextPayday;
+        employee.id.transfer(employee.salary);
+
+        GetPaid(msg.sender);
+    }
+
+    function checkInfo() returns (uint balance, uint runway, uint employeeCount) {
+        balance = this.balance;
+        employeeCount = totalEmployee;
+
+        if (totalSalary > 0) {
+            runway = calculateRunway();
+        }
+    }
+}

Lesson-6/assignment/README.md

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+## 硅谷live以太坊智能合约 第六课作业
+这里是同学提交作业的目录
+
+### 第六课：课后作业

Lesson-6/orgin/README.md

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+## 硅谷live以太坊智能合约 第六课
+
+这里是每一课的初始代码，有需要的同学可以参考