Contract Address Details

0x6840e9A4a29dFE5603D5C0512c6a2bEd704ab201

Contract Name: Lottery

Creator: 0xc0a1ac–7fae10 at 0x0306cb–b951fc

Balance: 0 3C

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

Transactions: 1 Transactions

Transfers: 0 Transfers

Gas Used: 34,086

Last Balance Update: 4741340

Transactions Internal Transactions Coin Balance History Logs Code Write Contract

Contract name:: Lottery
Optimization enabled: false

Compiler version: v0.8.20+commit.a1b79de6

EVM Version: paris
Verified at: 2025-05-31T14:11:45.547662Z

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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