Merge pull request #1477 from ShivRaiGithub/main

Added Voting.sol and Raffle.sol to Blockchain/Intermediate

Blockchain Development/Intermediate/Raffle/Raffle.sol

@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.28;
+
+contract Raffle {
+    address public owner;
+    address[] public participants;
+    address public winner;
+    uint public ticketPrice;
+    bool public isActive;
+
+    event EnterRaffle(address indexed participant);
+    event WinnerSelected(address winner);
+
+    modifier onlyOwner() {
+        require(msg.sender == owner, "Not the owner");
+        _;
+    }
+
+    constructor(uint _ticketPrice) {
+        owner = msg.sender;
+        ticketPrice = _ticketPrice;
+        isActive = true;
+        winner = address(0);
+    }
+
+    // Function for participants to enter the raffle
+    function enterRaffle() public payable {
+        require(isActive, "Raffle is not active");
+        require(msg.value == ticketPrice, "Incorrect ticket price");
+        participants.push(msg.sender);
+        emit EnterRaffle(msg.sender);
+    }
+
+    function endRaffle() public onlyOwner {
+        isActive=false;
+    }
+
+    // Function to randomly select a winner (only the owner can call this)
+    function selectWinner() public onlyOwner {
+        require(participants.length > 0, "No participants in the raffle");
+        require(!isActive, "Raffle is active");
+        uint randomIndex = random() % participants.length;
+        winner = participants[randomIndex];
+        emit WinnerSelected(winner);
+    }
+    // Winner withdraws the prize money
+    function getPrizeMoney() public {
+        require(msg.sender==winner,"Only winner can call");
+        payable(winner).transfer(address(this).balance);
+        winner = address(0);
+    }
+
+    // Pseudo-random number generator (for demonstration purposes)
+    function random() private view returns (uint) {
+        return uint(keccak256(abi.encodePacked(block.prevrandao, block.timestamp, participants)));
+    }
+
+    // Get the total number of participants
+    function getParticipantsCount() public view returns (uint) {
+        return participants.length;
+    }
+
+    function getPrizePool() public view returns(uint){
+        return address(this).balance;
+    }
+}

Blockchain Development/Intermediate/Raffle/readme.md

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+# Raffle Smart Contract
+
+This is a simple **Raffle** smart contract where participants can join the raffle by paying a specified ticket price, and the contract owner can select a winner at the end of the raffle.
+
+## Features
+
+- **Enter the Raffle**: Participants can enter the raffle by paying the exact ticket price.
+- **Select a Winner**: The contract owner can select a random winner from the participants.
+- **Prize Money Withdrawal**: The winner can withdraw the prize pool.
+- **View Participants Count**: Get the total number of participants.
+- **Check Prize Pool**: Get the total amount of Ether collected in the raffle.
+
+## Contract Details
+
+- **Owner**: The person who deploys the contract will be the owner.
+- **Ticket Price**: The price to enter the raffle, set at deployment.
+- **Participants**: An array storing the addresses of all participants.
+- **Winner**: The randomly selected winner of the raffle.
+
+## How to Use
+
+1. **Deploy the Contract**: Deploy the contract with the desired ticket price.
+2. **Enter the Raffle**: Participants can enter the raffle by sending Ether equal to the ticket price.
+3. **End the Raffle**: The owner can end the raffle to stop more entries.
+4. **Select a Winner**: Once the raffle is ended, the owner can select a winner.
+5. **Withdraw Prize**: The winner can withdraw the prize pool.

Blockchain Development/README.md

@@ -19,8 +19,9 @@
 
 ## Level 2: Intermediate 🚀
 
-<i>Nothing to showcase here!</i>
-
+| S-No. | Projects | S-No. | Projects |
+|:--:|:--:|:--:|:--:|
+| 01. | [Raffle](https://github.com/Kushal997-das/Project-Guidance/tree/main/Blockchain%20Development/Intermediate/Raffle) |
 ## Level 3: Advanced 🚀
 
 <i>Nothing to showcase here!</i>