Merge branch 'main' of https://github.com/AmazingAng/WTF-Solidity

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diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
diff --git a/.github/ISSUE_TEMPLATE/improvement.md b/.github/ISSUE_TEMPLATE/improvement.md
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diff --git a/01_HelloWeb3/readme.md b/01_HelloWeb3/readme.md
@@ -14,7 +14,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/02_ValueTypes/readme.md b/02_ValueTypes/readme.md
@@ -14,7 +14,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
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+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
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diff --git a/03_Function/readme.md b/03_Function/readme.md
@@ -14,7 +14,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/04_Return/readme.md b/04_Return/readme.md
@@ -15,7 +15,7 @@ tags:
 
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-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
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diff --git a/05_DataStorage/readme.md b/05_DataStorage/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
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diff --git a/06_ArrayAndStruct/readme.md b/06_ArrayAndStruct/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 这一讲，我们将介绍`Solidity`中的两个重要变量类型：数组（`array`）和结构体（`struct`）。

diff --git a/07_Mapping/readme.md b/07_Mapping/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/08_InitialValue/readme.md b/08_InitialValue/readme.md
@@ -14,7 +14,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/09_Constant/readme.md b/09_Constant/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 这一讲，我们介绍Solidity中和常量相关的两个关键字，`constant`（常量）和`immutable`（不变量）。状态变量声明这两个关键字之后，不能在初始化后更改数值。这样做的好处是提升合约的安全性并节省`gas`。

diff --git a/10_InsertionSort/readme.md b/10_InsertionSort/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 这一讲，我们将介绍`Solidity`中的控制流，然后讲如何用`Solidity`实现插入排序（`InsertionSort`），一个看起来简单，但实际上很容易写出`bug`的程序。

diff --git a/11_Modifier/readme.md b/11_Modifier/readme.md
@@ -16,7 +16,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/12_Event/readme.md b/12_Event/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/13_Inheritance/readme.md b/13_Inheritance/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 这一讲，我们介绍`Solidity`中的继承（`inheritance`），包括简单继承，多重继承，以及修饰器（`Modifier`）和构造函数（`Constructor`）的继承。

diff --git a/14_Interface/readme.md b/14_Interface/readme.md
@@ -16,15 +16,15 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 
 这一讲，我们用`ERC721`的接口合约为例介绍`Solidity`中的抽象合约（`abstract`）和接口（`interface`），帮助大家更好的理解`ERC721`标准。
 
 ## 抽象合约
 
-如果一个智能合约里至少有一个未实现的函数，即某个函数缺少主体`{}`中的内容，则必须将该合约标为`abstract`，不然编译会报错；另外，未实现的函数需要加`virtual`，以便子合约重写。拿我们之前的[插入排序合约](https://github.com/AmazingAng/WTFSolidity/tree/main/10_InsertionSort)为例，如果我们还没想好具体怎么实现插入排序函数，那么可以把合约标为`abstract`，之后让别人补写上。
+如果一个智能合约里至少有一个未实现的函数，即某个函数缺少主体`{}`中的内容，则必须将该合约标为`abstract`，不然编译会报错；另外，未实现的函数需要加`virtual`，以便子合约重写。拿我们之前的[插入排序合约](https://github.com/AmazingAng/WTF-Solidity/tree/main/10_InsertionSort)为例，如果我们还没想好具体怎么实现插入排序函数，那么可以把合约标为`abstract`，之后让别人补写上。
 
 ```solidity
 abstract contract InsertionSort{

diff --git a/15_Errors/readme.md b/15_Errors/readme.md
@@ -16,7 +16,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/16_Overloading/readme.md b/16_Overloading/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 
@@ -37,7 +37,7 @@ function saySomething(string memory something) public pure returns(string memory
 }
 ```
 
-最终重载函数在经过编译器编译后，由于不同的参数类型，都变成了不同的函数选择器（selector）。关于函数选择器的具体内容可参考[WTF Solidity极简入门: 29. 函数选择器Selector](https://github.com/AmazingAng/WTFSolidity/tree/main/29_Selector)。
+最终重载函数在经过编译器编译后，由于不同的参数类型，都变成了不同的函数选择器（selector）。关于函数选择器的具体内容可参考[WTF Solidity极简入门: 29. 函数选择器Selector](https://github.com/AmazingAng/WTF-Solidity/tree/main/29_Selector)。
 
 以 `Overloading.sol` 合约为例，在 Remix 上编译部署后，分别调用重载函数 `saySomething()` 和 `saySomething(string memory something)`，可以看到他们返回了不同的结果，被区分为不同的函数。
 

diff --git a/17_Library/readme.md b/17_Library/readme.md
@@ -16,7 +16,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 这一讲，我们用`ERC721`的引用的库合约`Strings`为例介绍`Solidity`中的库合约（`Library`），并总结了常用的库合约。

diff --git a/18_Import/readme.md b/18_Import/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/19_Fallback/readme.md b/19_Fallback/readme.md
@@ -16,7 +16,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/20_SendETH/readme.md b/20_SendETH/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 `Solidity`有三种方法向其他合约发送`ETH`，他们是：`transfer()`，`send()`和`call()`，其中`call()`是被鼓励的用法。

diff --git a/21_CallContract/readme.md b/21_CallContract/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/22_Call/readme.md b/22_Call/readme.md
@@ -16,18 +16,18 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 
-我们曾在[第20讲：发送ETH](https://github.com/AmazingAng/WTFSolidity/tree/main/20_SendETH)那一讲介绍过利用`call`来发送`ETH`，这一讲我们将介绍如何利用它调用合约。
+我们曾在[第20讲：发送ETH](https://github.com/AmazingAng/WTF-Solidity/tree/main/20_SendETH)那一讲介绍过利用`call`来发送`ETH`，这一讲我们将介绍如何利用它调用合约。
 
 ## Call
 
 `call` 是`address`类型的低级成员函数，它用来与其他合约交互。它的返回值为`(bool, bytes memory)`，分别对应`call`是否成功以及目标函数的返回值。
 
 - `call`是`Solidity`官方推荐的通过触发`fallback`或`receive`函数发送`ETH`的方法。
-- 不推荐用`call`来调用另一个合约，因为当你调用不安全合约的函数时，你就把主动权交给了它。推荐的方法仍是声明合约变量后调用函数，见[第21讲：调用其他合约](https://github.com/AmazingAng/WTFSolidity/tree/main/21_CallContract)
+- 不推荐用`call`来调用另一个合约，因为当你调用不安全合约的函数时，你就把主动权交给了它。推荐的方法仍是声明合约变量后调用函数，见[第21讲：调用其他合约](https://github.com/AmazingAng/WTF-Solidity/tree/main/21_CallContract)
 - 当我们不知道对方合约的源代码或`ABI`，就没法生成合约变量；这时，我们仍可以通过`call`调用对方合约的函数。
 
 ### `call`的使用规则

diff --git a/23_Delegatecall/readme.md b/23_Delegatecall/readme.md
@@ -16,7 +16,7 @@ tags:
 
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-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
 ---
 

diff --git a/24_Create/readme.md b/24_Create/readme.md
@@ -15,7 +15,7 @@ tags:
 
 社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
 
-所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
 
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     社区：[Discord](https://discord.gg/5akcruXrsk)｜[微信群](https://docs.google.com/forms/d/e/1FAIpQLSe4KGT8Sh6sJ7hedQRuIYirOoZK_85miz3dw7vA1-YjodgJ-A/viewform?usp=sf_link)｜[官网 wtf.academy](https://wtf.academy)
-    所有代码和教程开源在 github: [github.com/AmazingAng/WTFSolidity](https://github.com/AmazingAng/WTFSolidity)
+    所有代码和教程开源在 github: [github.com/AmazingAng/WTF-Solidity](https://github.com/AmazingAng/WTF-Solidity)
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