diff --git a/Lesson4/README.md b/Lesson4/README.md
new file mode 100644
index 000000000..34bf0bb82
--- /dev/null
+++ b/Lesson4/README.md
@@ -0,0 +1,16 @@
+## 硅谷live以太坊智能合约频道官方地址
+
+### 第四课《使用Truffle架构进行前后端交互，测试，部署》
+
+目录结构
+
|
+
|--orgin 课程初始代码
+
|
+
|--assignment 课程作业提交代码
+
+### 本节知识点
+第4课：使用Truffle架构进行前后端交互，测试，部署
+- 为什么要用Truffle，Truffle的基本概念
+- Truffle 的command line 功能
+- 初始化项目与Truffle项目目录结构
+- 编译部署合约到testrpc
diff --git a/Lesson4/assignment/README.md b/Lesson4/assignment/README.md
new file mode 100644
index 000000000..871e6be04
--- /dev/null
+++ b/Lesson4/assignment/README.md
@@ -0,0 +1,12 @@
+## 硅谷live以太坊智能合约 第四课作业
+这里是同学提交作业的目录
+
+### 第四课：课后作业
+- 将第三课完成的payroll.sol程序导入truffle工程
+- 在test文件夹中，写出对如下两个函数的单元测试：
+- function addEmployee(address employeeId, uint salary) onlyOwner
+- function removeEmployee(address employeeId) onlyOwner employeeExist(employeeId)
+- 思考一下我们如何能覆盖所有的测试路径，包括函数异常的捕捉
+- (加分题,选作）
+- 写出对以下函数的基于solidity或javascript的单元测试 function getPaid() employeeExist(msg.sender)
+- Hint：思考如何对timestamp进行修改，是否需要对所测试的合约进行修改来达到测试的目的？
diff --git a/Lesson4/assignment/build/contracts/Migrations.json b/Lesson4/assignment/build/contracts/Migrations.json
new file mode 100644
index 000000000..90973afd0
--- /dev/null
+++ b/Lesson4/assignment/build/contracts/Migrations.json
@@ -0,0 +1,827 @@
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diff --git a/Lesson4/assignment/build/contracts/Ownable.json b/Lesson4/assignment/build/contracts/Ownable.json
new file mode 100644
index 000000000..1f89a6968
--- /dev/null
+++ b/Lesson4/assignment/build/contracts/Ownable.json
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+ "src": "217:787:0"
+ }
+ ],
+ "id": 56,
+ "name": "SourceUnit",
+ "src": "0:1004:0"
+ },
+ "compiler": {
+ "name": "solc",
+ "version": "0.4.19+commit.c4cbbb05.Emscripten.clang"
+ },
+ "networks": {
+ "1517826747297": {
+ "events": {},
+ "links": {},
+ "address": "0xad08beaec3da2baa37c4920c102dc0b1da0249f4"
+ }
+ },
+ "schemaVersion": "1.0.1",
+ "updatedAt": "2018-02-05T10:43:03.875Z"
+}
\ No newline at end of file
diff --git a/Lesson4/assignment/build/contracts/Payroll.json b/Lesson4/assignment/build/contracts/Payroll.json
new file mode 100644
index 000000000..a5d6172d4
--- /dev/null
+++ b/Lesson4/assignment/build/contracts/Payroll.json
@@ -0,0 +1,5006 @@
+{
+ "contractName": "Payroll",
+ "abi": [
+ {
+ "constant": true,
+ "inputs": [],
+ "name": "owner",
+ "outputs": [
+ {
+ "name": "",
+ "type": "address"
+ }
+ ],
+ "payable": false,
+ "stateMutability": "view",
+ "type": "function"
+ },
+ {
+ "constant": true,
+ "inputs": [
+ {
+ "name": "",
+ "type": "address"
+ }
+ ],
+ "name": "employees",
+ "outputs": [
+ {
+ "name": "id",
+ "type": "address"
+ },
+ {
+ "name": "salary",
+ "type": "uint256"
+ },
+ {
+ "name": "lastPayday",
+ "type": "uint256"
+ }
+ ],
+ "payable": false,
+ "stateMutability": "view",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [
+ {
+ "name": "newOwner",
+ "type": "address"
+ }
+ ],
+ "name": "transferOwnership",
+ "outputs": [],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ },
+ {
+ "anonymous": false,
+ "inputs": [
+ {
+ "indexed": true,
+ "name": "previousOwner",
+ "type": "address"
+ },
+ {
+ "indexed": true,
+ "name": "newOwner",
+ "type": "address"
+ }
+ ],
+ "name": "OwnershipTransferred",
+ "type": "event"
+ },
+ {
+ "constant": false,
+ "inputs": [
+ {
+ "name": "employeeId",
+ "type": "address"
+ },
+ {
+ "name": "salary",
+ "type": "uint256"
+ }
+ ],
+ "name": "addEmployee",
+ "outputs": [],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [
+ {
+ "name": "employeeId",
+ "type": "address"
+ }
+ ],
+ "name": "removeEmployee",
+ "outputs": [],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [
+ {
+ "name": "employeeId",
+ "type": "address"
+ },
+ {
+ "name": "salary",
+ "type": "uint256"
+ }
+ ],
+ "name": "updateEmployee",
+ "outputs": [],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [],
+ "name": "addFund",
+ "outputs": [
+ {
+ "name": "",
+ "type": "uint256"
+ }
+ ],
+ "payable": true,
+ "stateMutability": "payable",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [],
+ "name": "calculateRunway",
+ "outputs": [
+ {
+ "name": "",
+ "type": "uint256"
+ }
+ ],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [],
+ "name": "hasEnoughFund",
+ "outputs": [
+ {
+ "name": "",
+ "type": "bool"
+ }
+ ],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [],
+ "name": "getPaid",
+ "outputs": [],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [
+ {
+ "name": "employeeId",
+ "type": "address"
+ },
+ {
+ "name": "newPaymentAddress",
+ "type": "address"
+ }
+ ],
+ "name": "changePaymentAddress",
+ "outputs": [],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ },
+ {
+ "constant": false,
+ "inputs": [
+ {
+ "name": "id",
+ "type": "address"
+ }
+ ],
+ "name": "getEmployee",
+ "outputs": [
+ {
+ "name": "salary",
+ "type": "uint256"
+ }
+ ],
+ "payable": false,
+ "stateMutability": "nonpayable",
+ "type": "function"
+ }
+ ],
+ "bytecode": 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diff --git a/Lesson4/assignment/build/contracts/SafeMath.json b/Lesson4/assignment/build/contracts/SafeMath.json
new file mode 100644
index 000000000..96d81f2c2
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+++ b/Lesson4/assignment/build/contracts/SafeMath.json
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+ "type": "tuple()",
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+ "typeString": "bool"
+ }
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+ "type": "function (bool) pure",
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+ "name": "Identifier",
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+ },
+ {
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+ "name": "Identifier",
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+ "type": "uint256"
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+ }
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+ "id": 480,
+ "name": "ParameterList",
+ "src": "1065:9:2"
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+ {
+ "attributes": {
+ "assignments": [
+ 482
+ ]
+ },
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+ "name": "ElementaryTypeName",
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+ "name": "VariableDeclaration",
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+ },
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+ "name": "Identifier",
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+ ],
+ "id": 485,
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+ },
+ "children": [
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+ "attributes": {
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+ {
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+ "typeString": "bool"
+ }
+ ],
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+ ],
+ "referencedDeclaration": 500,
+ "type": "function (bool) pure",
+ "value": "assert"
+ },
+ "id": 487,
+ "name": "Identifier",
+ "src": "1104:6:2"
+ },
+ {
+ "attributes": {
+ "argumentTypes": null,
+ "commonType": {
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+ "typeString": "uint256"
+ },
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+ "lValueRequested": false,
+ "operator": ">=",
+ "type": "bool"
+ },
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+ {
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+ "overloadedDeclarations": [
+ null
+ ],
+ "referencedDeclaration": 482,
+ "type": "uint256",
+ "value": "c"
+ },
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+ "name": "Identifier",
+ "src": "1111:1:2"
+ },
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+ null
+ ],
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+ "value": "a"
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+ "value": "c"
+ },
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+ "name": "Identifier",
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+ }
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+ "name": "Return",
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+ "name": "Block",
+ "src": "1075:62:2"
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+ ],
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+ "name": "FunctionDefinition",
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+ "name": "ContractDefinition",
+ "src": "117:1022:2"
+ }
+ ],
+ "id": 498,
+ "name": "SourceUnit",
+ "src": "0:1139:2"
+ },
+ "compiler": {
+ "name": "solc",
+ "version": "0.4.19+commit.c4cbbb05.Emscripten.clang"
+ },
+ "networks": {
+ "1517826747297": {
+ "events": {},
+ "links": {},
+ "address": "0x38af3515e68b2c3982b0d98f54a04d068a4fcfad"
+ }
+ },
+ "schemaVersion": "1.0.1",
+ "updatedAt": "2018-02-05T10:43:03.877Z"
+}
\ No newline at end of file
diff --git a/Lesson4/assignment/contracts/Migrations.sol b/Lesson4/assignment/contracts/Migrations.sol
new file mode 100644
index 000000000..f170cb4fa
--- /dev/null
+++ b/Lesson4/assignment/contracts/Migrations.sol
@@ -0,0 +1,23 @@
+pragma solidity ^0.4.17;
+
+contract Migrations {
+ address public owner;
+ uint public last_completed_migration;
+
+ modifier restricted() {
+ if (msg.sender == owner) _;
+ }
+
+ function Migrations() public {
+ owner = msg.sender;
+ }
+
+ function setCompleted(uint completed) public restricted {
+ last_completed_migration = completed;
+ }
+
+ function upgrade(address new_address) public restricted {
+ Migrations upgraded = Migrations(new_address);
+ upgraded.setCompleted(last_completed_migration);
+ }
+}
diff --git a/Lesson4/assignment/contracts/Ownable.sol b/Lesson4/assignment/contracts/Ownable.sol
new file mode 100644
index 000000000..d52c4864a
--- /dev/null
+++ b/Lesson4/assignment/contracts/Ownable.sol
@@ -0,0 +1,42 @@
+pragma solidity ^0.4.18;
+
+
+/**
+ * @title Ownable
+ * @dev The Ownable contract has an owner address, and provides basic authorization control
+ * functions, this simplifies the implementation of "user permissions".
+ */
+contract Ownable {
+ address public owner;
+
+
+ event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
+
+
+ /**
+ * @dev The Ownable constructor sets the original `owner` of the contract to the sender
+ * account.
+ */
+ function Ownable() public {
+ owner = msg.sender;
+ }
+
+ /**
+ * @dev Throws if called by any account other than the owner.
+ */
+ modifier onlyOwner() {
+ require(msg.sender == owner);
+ _;
+ }
+
+ /**
+ * @dev Allows the current owner to transfer control of the contract to a newOwner.
+ * @param newOwner The address to transfer ownership to.
+ */
+ function transferOwnership(address newOwner) public onlyOwner {
+ require(newOwner != address(0));
+ OwnershipTransferred(owner, newOwner);
+ owner = newOwner;
+ }
+
+}
\ No newline at end of file
diff --git a/Lesson4/assignment/contracts/Payroll.sol b/Lesson4/assignment/contracts/Payroll.sol
new file mode 100644
index 000000000..f36a93a0e
--- /dev/null
+++ b/Lesson4/assignment/contracts/Payroll.sol
@@ -0,0 +1,100 @@
+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 = 100 seconds;
+
+ uint totalSalary = 0;
+ mapping(address => Employee) public employees;
+
+ modifier employeeExist(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 addEmployee(address employeeId, uint salary) onlyOwner {
+ var employee = employees[employeeId];
+ assert(employee.id == 0x0);
+ uint newSalary = salary.mul(1 ether);
+ employees[employeeId] = Employee(employeeId, newSalary, now);
+ totalSalary = totalSalary.add(newSalary);
+ }
+
+
+
+ function removeEmployee(address employeeId) onlyOwner employeeExist(employeeId) {
+ var employee = employees[employeeId];
+
+ _partialPaid(employee);
+ totalSalary = totalSalary.sub(employee.salary);
+ delete employees[employeeId];
+ }
+
+ function updateEmployee(address employeeId, uint salary) onlyOwner employeeExist(employeeId) {
+ var employee = employees[employeeId];
+ _partialPaid(employee);
+ totalSalary = totalSalary.sub(employee.salary);
+ uint newSalary = salary.mul(1 ether);
+ totalSalary = totalSalary.add(newSalary);
+ employees[employeeId].salary = newSalary;
+ employees[employeeId].lastPayday = now;
+ }
+
+ function addFund() payable public returns (uint) {
+ return this.balance;
+ }
+
+ function calculateRunway() returns (uint) {
+ return this.balance.div(totalSalary);
+ }
+
+ function hasEnoughFund() returns (bool) {
+ return calculateRunway() > 0;
+ }
+
+ function getPaid() employeeExist(msg.sender) {
+ var employee = employees[msg.sender];
+
+ uint nextPayday = employee.lastPayday.sub(payDuration);
+ assert(nextPayday < now);
+ employees[msg.sender].lastPayday = nextPayday;
+ employee.id.transfer(employee.salary);
+
+ }
+
+ function changePaymentAddress(address employeeId, address newPaymentAddress) onlyOwner employeeExist(msg.sender) {
+ var employee = employees[employeeId];
+ _partialPaid(employee);
+ employee.id = newPaymentAddress;
+ }
+
+ function getEmployee(address id) returns (uint salary) {
+ var employee = employees[id];
+ if (employee.id == 0x0) {
+ return (0);
+ } else {
+ return (employee.salary);
+ }
+ }
+
+
+}
\ No newline at end of file
diff --git a/Lesson4/assignment/contracts/SafeMath.sol b/Lesson4/assignment/contracts/SafeMath.sol
new file mode 100644
index 000000000..a54a5eee6
--- /dev/null
+++ b/Lesson4/assignment/contracts/SafeMath.sol
@@ -0,0 +1,48 @@
+pragma solidity ^0.4.18;
+
+
+/**
+ * @title SafeMath
+ * @dev Math operations with safety checks that throw on error
+ */
+library SafeMath {
+
+ /**
+ * @dev Multiplies two numbers, throws on overflow.
+ */
+ function mul(uint256 a, uint256 b) internal pure returns (uint256) {
+ if (a == 0) {
+ return 0;
+ }
+ uint256 c = a * b;
+ assert(c / a == b);
+ return c;
+ }
+
+ /**
+ * @dev Integer division of two numbers, truncating the quotient.
+ */
+ function div(uint256 a, uint256 b) internal pure returns (uint256) {
+ // assert(b > 0); // Solidity automatically throws when dividing by 0
+ uint256 c = a / b;
+ // assert(a == b * c + a % b); // There is no case in which this doesn't hold
+ return c;
+ }
+
+ /**
+ * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
+ */
+ function sub(uint256 a, uint256 b) internal pure returns (uint256) {
+ assert(b <= a);
+ return a - b;
+ }
+
+ /**
+ * @dev Adds two numbers, throws on overflow.
+ */
+ function add(uint256 a, uint256 b) internal pure returns (uint256) {
+ uint256 c = a + b;
+ assert(c >= a);
+ return c;
+ }
+}
\ No newline at end of file
diff --git a/Lesson4/assignment/migrations/1_initial_migration.js b/Lesson4/assignment/migrations/1_initial_migration.js
new file mode 100644
index 000000000..4d5f3f9b0
--- /dev/null
+++ b/Lesson4/assignment/migrations/1_initial_migration.js
@@ -0,0 +1,5 @@
+var Migrations = artifacts.require("./Migrations.sol");
+
+module.exports = function(deployer) {
+ deployer.deploy(Migrations);
+};
diff --git a/Lesson4/assignment/migrations/2_deploy_contracts.js b/Lesson4/assignment/migrations/2_deploy_contracts.js
new file mode 100644
index 000000000..c8b6f927e
--- /dev/null
+++ b/Lesson4/assignment/migrations/2_deploy_contracts.js
@@ -0,0 +1,11 @@
+var SafeMathLib = artifacts.require("./SafeMath.sol");
+var OwnableLib = artifacts.require("./Ownable.sol");
+var Payroll = artifacts.require("./Payroll.sol");
+
+module.exports = function(deployer) {
+ deployer.deploy(SafeMathLib);
+ deployer.deploy(OwnableLib);
+ deployer.link(SafeMathLib, Payroll);
+ deployer.link(OwnableLib, Payroll);
+ deployer.deploy(Payroll);
+};
\ No newline at end of file
diff --git a/Lesson4/assignment/test/payroll.js b/Lesson4/assignment/test/payroll.js
new file mode 100644
index 000000000..3234deccd
--- /dev/null
+++ b/Lesson4/assignment/test/payroll.js
@@ -0,0 +1,29 @@
+var Payroll = artifacts.require("../contracts/Payroll.sol");
+
+
+
+contract('Payroll', function(accounts) {
+
+ var id = "0xca35b7d915458ef540ade6068dfe2f44e8fa733c";
+
+ it("Add an employee", function() {
+ return Payroll.deployed().then(function(instance) {
+ payroll = instance;
+ payroll.addEmployee(id, 1);
+ }).then(function() {
+ return payroll.getEmployee.call(id);
+ }).then(function(res) {
+ assert.equal(res, '1000000000000000000', "Add employee error");
+ });
+ });
+
+ it("Remove an employee", function() {
+ return Payroll.deployed().then(function(instance) {
+ payroll = instance;
+ payroll.removeEmployee(accounts[1]);
+ }).then(function() {
+ assert(true, "Remove Error !");
+ });
+ });
+
+});
diff --git a/Lesson4/assignment/truffle-config.js b/Lesson4/assignment/truffle-config.js
new file mode 100644
index 000000000..a6330d6d5
--- /dev/null
+++ b/Lesson4/assignment/truffle-config.js
@@ -0,0 +1,4 @@
+module.exports = {
+ // See
+ // to customize your Truffle configuration!
+};
diff --git a/Lesson4/assignment/truffle.js b/Lesson4/assignment/truffle.js
new file mode 100644
index 000000000..29034612d
--- /dev/null
+++ b/Lesson4/assignment/truffle.js
@@ -0,0 +1,9 @@
+module.exports = {
+ networks: {
+ development: {
+ host: "localhost",
+ port: 8545,
+ network_id: "*"
+ }
+ }
+};
diff --git a/Lesson4/assignment/yours.sol b/Lesson4/assignment/yours.sol
new file mode 100644
index 000000000..dfdb2c486
--- /dev/null
+++ b/Lesson4/assignment/yours.sol
@@ -0,0 +1 @@
+/*作业请提交在这个目录下*/
diff --git a/Lesson4/orgin/README.md b/Lesson4/orgin/README.md
new file mode 100644
index 000000000..c27ba052f
--- /dev/null
+++ b/Lesson4/orgin/README.md
@@ -0,0 +1,3 @@
+## 硅谷live以太坊智能合约 第四课
+
+这里是每一课的初始代码，有需要的同学可以参考
diff --git a/Lesson4/orgin/payroll.sol b/Lesson4/orgin/payroll.sol
new file mode 100644
index 000000000..8b1378917
--- /dev/null
+++ b/Lesson4/orgin/payroll.sol
@@ -0,0 +1 @@
+
diff --git a/Lesson5/README.md b/Lesson5/README.md
new file mode 100644
index 000000000..0d3ed1d1e
--- /dev/null
+++ b/Lesson5/README.md
@@ -0,0 +1,13 @@
+## 硅谷live以太坊智能合约频道官方地址
+
+### 第五课
+
+目录结构
+
|
+
|--orgin 课程初始代码
+
|
+
|--assignment 课程作业提交代码
+
+
+### 本节知识点
+
diff --git a/Lesson5/assignment/README.md b/Lesson5/assignment/README.md
new file mode 100644
index 000000000..5661cd368
--- /dev/null
+++ b/Lesson5/assignment/README.md
@@ -0,0 +1,2 @@
+## 硅谷live以太坊智能合约 第五课作业
+这里是同学提交作业的目录
diff --git a/Lesson5/assignment/yours.sol b/Lesson5/assignment/yours.sol
new file mode 100644
index 000000000..dfdb2c486
--- /dev/null
+++ b/Lesson5/assignment/yours.sol
@@ -0,0 +1 @@
+/*作业请提交在这个目录下*/
diff --git a/Lesson5/orgin/LICENSE b/Lesson5/orgin/LICENSE
new file mode 100644
index 000000000..8dada3eda
--- /dev/null
+++ b/Lesson5/orgin/LICENSE
@@ -0,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
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diff --git a/Lesson5/orgin/README.md b/Lesson5/orgin/README.md
new file mode 100644
index 000000000..7c98c0387
--- /dev/null
+++ b/Lesson5/orgin/README.md
@@ -0,0 +1,13 @@
+# payroll
+
+A payroll system developed with React and Solidty for Ethereum Blockchain platform.
+
+## Get Started
+
+1. Install dependencies `npm install -g truffle ethereumjs-testrpc`
+1. Install [Metamask](https://metamask.io/)
+1. Run `testrpc`
+1. Add first account in testrpc to Metamask by importing private key
+1. Run `truffle compile` in the project directory
+1. `truffle migrate`
+1. `npm run start`
diff --git a/Lesson5/orgin/box-img-lg.png b/Lesson5/orgin/box-img-lg.png
new file mode 100644
index 000000000..60c19962a
Binary files /dev/null and b/Lesson5/orgin/box-img-lg.png differ
diff --git a/Lesson5/orgin/box-img-sm.png b/Lesson5/orgin/box-img-sm.png
new file mode 100644
index 000000000..466e7097e
Binary files /dev/null and b/Lesson5/orgin/box-img-sm.png differ
diff --git a/Lesson5/orgin/config/env.js b/Lesson5/orgin/config/env.js
new file mode 100644
index 000000000..5d0ab7b79
--- /dev/null
+++ b/Lesson5/orgin/config/env.js
@@ -0,0 +1,28 @@
+// Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
+// injected into the application via DefinePlugin in Webpack configuration.
+
+var REACT_APP = /^REACT_APP_/i;
+
+function getClientEnvironment(publicUrl) {
+ var processEnv = Object
+ .keys(process.env)
+ .filter(key => REACT_APP.test(key))
+ .reduce((env, key) => {
+ env[key] = JSON.stringify(process.env[key]);
+ return env;
+ }, {
+ // Useful for determining whether we’re running in production mode.
+ // Most importantly, it switches React into the correct mode.
+ 'NODE_ENV': JSON.stringify(
+ process.env.NODE_ENV || 'development'
+ ),
+ // Useful for resolving the correct path to static assets in `public`.
+ // For example, 
.
+ // This should only be used as an escape hatch. Normally you would put
+ // images into the `src` and `import` them in code to get their paths.
+ 'PUBLIC_URL': JSON.stringify(publicUrl)
+ });
+ return {'process.env': processEnv};
+}
+
+module.exports = getClientEnvironment;
diff --git a/Lesson5/orgin/config/jest/cssTransform.js b/Lesson5/orgin/config/jest/cssTransform.js
new file mode 100644
index 000000000..aa17d127a
--- /dev/null
+++ b/Lesson5/orgin/config/jest/cssTransform.js
@@ -0,0 +1,12 @@
+// This is a custom Jest transformer turning style imports into empty objects.
+// http://facebook.github.io/jest/docs/tutorial-webpack.html
+
+module.exports = {
+ process() {
+ return 'module.exports = {};';
+ },
+ getCacheKey(fileData, filename) {
+ // The output is always the same.
+ return 'cssTransform';
+ },
+};
diff --git a/Lesson5/orgin/config/jest/fileTransform.js b/Lesson5/orgin/config/jest/fileTransform.js
new file mode 100644
index 000000000..927eb305a
--- /dev/null
+++ b/Lesson5/orgin/config/jest/fileTransform.js
@@ -0,0 +1,10 @@
+const path = require('path');
+
+// This is a custom Jest transformer turning file imports into filenames.
+// http://facebook.github.io/jest/docs/tutorial-webpack.html
+
+module.exports = {
+ process(src, filename) {
+ return 'module.exports = ' + JSON.stringify(path.basename(filename)) + ';';
+ },
+};
diff --git a/Lesson5/orgin/config/paths.js b/Lesson5/orgin/config/paths.js
new file mode 100644
index 000000000..96c3dfb11
--- /dev/null
+++ b/Lesson5/orgin/config/paths.js
@@ -0,0 +1,46 @@
+var path = require('path');
+var fs = require('fs');
+
+// Make sure any symlinks in the project folder are resolved:
+// https://github.com/facebookincubator/create-react-app/issues/637
+var appDirectory = fs.realpathSync(process.cwd());
+function resolveApp(relativePath) {
+ return path.resolve(appDirectory, relativePath);
+}
+
+// We support resolving modules according to `NODE_PATH`.
+// This lets you use absolute paths in imports inside large monorepos:
+// https://github.com/facebookincubator/create-react-app/issues/253.
+
+// It works similar to `NODE_PATH` in Node itself:
+// https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders
+
+// We will export `nodePaths` as an array of absolute paths.
+// It will then be used by Webpack configs.
+// Jest doesn’t need this because it already handles `NODE_PATH` out of the box.
+
+// Note that unlike in Node, only *relative* paths from `NODE_PATH` are honored.
+// Otherwise, we risk importing Node.js core modules into an app instead of Webpack shims.
+// https://github.com/facebookincubator/create-react-app/issues/1023#issuecomment-265344421
+
+var nodePaths = (process.env.NODE_PATH || '')
+ .split(process.platform === 'win32' ? ';' : ':')
+ .filter(Boolean)
+ .filter(folder => !path.isAbsolute(folder))
+ .map(resolveApp);
+
+// config after eject: we're in ./config/
+module.exports = {
+ // Changed from build to build_webpack so smart contract compilations are not overwritten.
+ appBuild: resolveApp('build_webpack'),
+ appPublic: resolveApp('public'),
+ appHtml: resolveApp('public/index.html'),
+ appIndexJs: resolveApp('src/index.js'),
+ appPackageJson: resolveApp('package.json'),
+ appSrc: resolveApp('src'),
+ yarnLockFile: resolveApp('yarn.lock'),
+ testsSetup: resolveApp('src/setupTests.js'),
+ appNodeModules: resolveApp('node_modules'),
+ ownNodeModules: resolveApp('node_modules'),
+ nodePaths: nodePaths
+};
diff --git a/Lesson5/orgin/config/polyfills.js b/Lesson5/orgin/config/polyfills.js
new file mode 100644
index 000000000..7e601502b
--- /dev/null
+++ b/Lesson5/orgin/config/polyfills.js
@@ -0,0 +1,14 @@
+if (typeof Promise === 'undefined') {
+ // Rejection tracking prevents a common issue where React gets into an
+ // inconsistent state due to an error, but it gets swallowed by a Promise,
+ // and the user has no idea what causes React's erratic future behavior.
+ require('promise/lib/rejection-tracking').enable();
+ window.Promise = require('promise/lib/es6-extensions.js');
+}
+
+// fetch() polyfill for making API calls.
+require('whatwg-fetch');
+
+// Object.assign() is commonly used with React.
+// It will use the native implementation if it's present and isn't buggy.
+Object.assign = require('object-assign');
diff --git a/Lesson5/orgin/config/webpack.config.dev.js b/Lesson5/orgin/config/webpack.config.dev.js
new file mode 100644
index 000000000..821743a2e
--- /dev/null
+++ b/Lesson5/orgin/config/webpack.config.dev.js
@@ -0,0 +1,242 @@
+var autoprefixer = require('autoprefixer');
+var webpack = require('webpack');
+var HtmlWebpackPlugin = require('html-webpack-plugin');
+var CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
+var InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
+var WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
+var getClientEnvironment = require('./env');
+var paths = require('./paths');
+
+
+
+// Webpack uses `publicPath` to determine where the app is being served from.
+// In development, we always serve from the root. This makes config easier.
+var publicPath = '/';
+// `publicUrl` is just like `publicPath`, but we will provide it to our app
+// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
+// Omit trailing slash as %PUBLIC_PATH%/xyz looks better than %PUBLIC_PATH%xyz.
+var publicUrl = '';
+// Get environment variables to inject into our app.
+var env = getClientEnvironment(publicUrl);
+
+// This is the development configuration.
+// It is focused on developer experience and fast rebuilds.
+// The production configuration is different and lives in a separate file.
+module.exports = {
+ // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
+ // See the discussion in https://github.com/facebookincubator/create-react-app/issues/343.
+ devtool: 'cheap-module-source-map',
+ // These are the "entry points" to our application.
+ // This means they will be the "root" imports that are included in JS bundle.
+ // The first two entry points enable "hot" CSS and auto-refreshes for JS.
+ entry: [
+ // Include an alternative client for WebpackDevServer. A client's job is to
+ // connect to WebpackDevServer by a socket and get notified about changes.
+ // When you save a file, the client will either apply hot updates (in case
+ // of CSS changes), or refresh the page (in case of JS changes). When you
+ // make a syntax error, this client will display a syntax error overlay.
+ // Note: instead of the default WebpackDevServer client, we use a custom one
+ // to bring better experience for Create React App users. You can replace
+ // the line below with these two lines if you prefer the stock client:
+ // require.resolve('webpack-dev-server/client') + '?/',
+ // require.resolve('webpack/hot/dev-server'),
+ require.resolve('react-dev-utils/webpackHotDevClient'),
+ // We ship a few polyfills by default:
+ require.resolve('./polyfills'),
+ // Finally, this is your app's code:
+ paths.appIndexJs
+ // We include the app code last so that if there is a runtime error during
+ // initialization, it doesn't blow up the WebpackDevServer client, and
+ // changing JS code would still trigger a refresh.
+ ],
+ output: {
+ // Next line is not used in dev but WebpackDevServer crashes without it:
+ path: paths.appBuild,
+ // Add /* filename */ comments to generated require()s in the output.
+ pathinfo: true,
+ // This does not produce a real file. It's just the virtual path that is
+ // served by WebpackDevServer in development. This is the JS bundle
+ // containing code from all our entry points, and the Webpack runtime.
+ filename: 'static/js/bundle.js',
+ // This is the URL that app is served from. We use "/" in development.
+ publicPath: publicPath
+ },
+ resolve: {
+ // This allows you to set a fallback for where Webpack should look for modules.
+ // We read `NODE_PATH` environment variable in `paths.js` and pass paths here.
+ // We use `fallback` instead of `root` because we want `node_modules` to "win"
+ // if there any conflicts. This matches Node resolution mechanism.
+ // https://github.com/facebookincubator/create-react-app/issues/253
+ fallback: paths.nodePaths,
+ // These are the reasonable defaults supported by the Node ecosystem.
+ // We also include JSX as a common component filename extension to support
+ // some tools, although we do not recommend using it, see:
+ // https://github.com/facebookincubator/create-react-app/issues/290
+ extensions: ['.js', '.json', '.jsx', ''],
+ alias: {
+ // Support React Native Web
+ // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
+ 'react-native': 'react-native-web'
+ }
+ },
+
+ module: {
+ // First, run the linter.
+ // It's important to do this before Babel processes the JS.
+ preLoaders: [
+ {
+ test: /\.(js|jsx)$/,
+ loader: 'eslint',
+ include: paths.appSrc,
+ }
+ ],
+ loaders: [
+ // Default loader: load all assets that are not handled
+ // by other loaders with the url loader.
+ // Note: This list needs to be updated with every change of extensions
+ // the other loaders match.
+ // E.g., when adding a loader for a new supported file extension,
+ // we need to add the supported extension to this loader too.
+ // Add one new line in `exclude` for each loader.
+ //
+ // "file" loader makes sure those assets get served by WebpackDevServer.
+ // When you `import` an asset, you get its (virtual) filename.
+ // In production, they would get copied to the `build` folder.
+ // "url" loader works like "file" loader except that it embeds assets
+ // smaller than specified limit in bytes as data URLs to avoid requests.
+ // A missing `test` is equivalent to a match.
+ {
+ exclude: [
+ /\.html$/,
+ /\.(js|jsx)$/,
+ /\.css$/,
+ /\.json$/,
+ /\.woff$/,
+ /\.woff2$/,
+ /\.(ttf|svg|eot)$/
+ ],
+ loader: 'url',
+ query: {
+ limit: 10000,
+ name: 'static/media/[name].[hash:8].[ext]'
+ }
+ },
+ // Process JS with Babel.
+ {
+ test: /\.(js|jsx)$/,
+ include: paths.appSrc,
+ loader: 'babel',
+ query: {
+
+ // This is a feature of `babel-loader` for webpack (not Babel itself).
+ // It enables caching results in ./node_modules/.cache/babel-loader/
+ // directory for faster rebuilds.
+ cacheDirectory: true
+ }
+ },
+ // "postcss" loader applies autoprefixer to our CSS.
+ // "css" loader resolves paths in CSS and adds assets as dependencies.
+ // "style" loader turns CSS into JS modules that inject