From 6470eb42049be67aa33e012d1dbcd3ff1df24ef8 Mon Sep 17 00:00:00 2001
From: bt3gl <1130416+bt3gl@users.noreply.github.com>
Date: Sat, 24 Sep 2022 21:27:17 -0700
Subject: [PATCH] =?UTF-8?q?=F0=9F=8D=A3=20add=20some=20boilerplates?=
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---
 master_solidity/boilerplates/hello-world.sol | 32 ++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 master_solidity/boilerplates/hello-world.sol

diff --git a/master_solidity/boilerplates/hello-world.sol b/master_solidity/boilerplates/hello-world.sol
new file mode 100644
index 0000000..24bd164
--- /dev/null
+++ b/master_solidity/boilerplates/hello-world.sol
@@ -0,0 +1,32 @@
+// Specifies the version of Solidity, using semantic versioning.
+// Learn more: https://solidity.readthedocs.io/en/v0.5.10/layout-of-source-files.html#pragma
+pragma solidity ^0.5.10;
+
+// Defines a contract named `HelloWorld`.
+// A contract is a collection of functions and data (its state).
+// Once deployed, a contract resides at a specific address on the Ethereum blockchain.
+// Learn more: https://solidity.readthedocs.io/en/v0.5.10/structure-of-a-contract.html
+contract HelloWorld {
+
+    // Declares a state variable `message` of type `string`.
+    // State variables are variables whose values are permanently stored in contract storage.
+    // The keyword `public` makes variables accessible from outside a contract
+    // and creates a function that other contracts or clients can call to access the value.
+    string public message;
+
+    // Similar to many class-based object-oriented languages, a constructor is
+    // a special function that is only executed upon contract creation.
+    // Constructors are used to initialize the contract's data.
+    // Learn more: https://solidity.readthedocs.io/en/v0.5.10/contracts.html#constructors
+    constructor(string memory initMessage) public {
+        // Accepts a string argument `initMessage` and sets the value
+        // into the contract's `message` storage variable).
+        message = initMessage;
+    }
+
+    // A public function that accepts a string argument
+    // and updates the `message` storage variable.
+    function update(string memory newMessage) public {
+        message = newMessage;
+    }
+}