Contract Address Details

0xC752aB50aeEeD5e7354EbDD61e04Ac5AA0E34ae0

Contract Name: Lottery

Creator: 0xc0a1ac–7fae10 at 0x85b1d4–28c2b4

Balance: 0 3C

Tokens: Fetching tokens... Error trying to fetch balances.

Transactions: 0 Transactions

Transfers: 0 Transfers

Gas Used: Fetching gas used...

Last Balance Update: 4743775

Transactions Internal Transactions Coin Balance History Code Write Contract

Contract name:: Lottery
Optimization enabled: false

Compiler version: v0.8.20+commit.a1b79de6

EVM Version: paris
Verified at: 2025-05-31T21:41:45.378139Z

Lottery.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
 
contract Lottery {
 
    // Define the event that will be emitted when winners are drawn
    event WinnersDrawn(address indexed sender, uint256[] winners);
 
    function drawWinners(uint256 from, uint256 to, uint256 count) external returns (uint256[] memory) {
        // Validate input ranges
        require(to > from, "Invalid range: 'to' must be greater than 'from'");
        require(count > 0 && count <= (to - from + 1), "Invalid count: 'count' must be positive and less than or equal to the range size");
 
        uint256[] memory numbers = new uint256[](to - from + 1);
        for (uint256 i = 0; i < numbers.length; i++) {
            numbers[i] = from + i;
        }
 
        // Shuffle using Fisher-Yates Algorithm
        for (uint256 i = 0; i < count; i++) {
            uint256 rand = uint256(keccak256(
                abi.encodePacked(
                    block.timestamp,
                    block.prevrandao, // <-- used instead of block.difficulty
                    msg.sender,
                    i
                )
            )) % (numbers.length - i);
 
            uint256 n = i + rand;
            (numbers[i], numbers[n]) = (numbers[n], numbers[i]);
        }
 
        uint256[] memory winners = new uint256[](count);
        for (uint256 i = 0; i < count; i++) {
            winners[i] = numbers[i];
        }
 
        // Emit the event with the winners
        emit WinnersDrawn(msg.sender, winners);
 
        return winners;
    }
}

Compiler Settings

{"outputSelection":{"*":{"*":["*"],"":["*"]}},"optimizer":{"runs":200,"enabled":false},"metadata":{"bytecodeHash":"ipfs"},"libraries":{},"evmVersion":"paris"}

Contract ABI

[{"type":"event","name":"WinnersDrawn","inputs":[{"type":"address","name":"sender","internalType":"address","indexed":true},{"type":"uint256[]","name":"winners","internalType":"uint256[]","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256[]","name":"","internalType":"uint256[]"}],"name":"drawWinners","inputs":[{"type":"uint256","name":"from","internalType":"uint256"},{"type":"uint256","name":"to","internalType":"uint256"},{"type":"uint256","name":"count","internalType":"uint256"}]}]

Contract Creation Code

Verify & Publish

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

Deployed ByteCode

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