/**
 *Submitted for verification at uniscan.xyz on 2025-03-07
*/

/**
 *Submitted for verification at uniscan.xyz on 2025-02-28
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

contract OnChainGM {
    // Immutable variables don't use storage slots
    address public immutable feeRecipient;
    uint256 public immutable GM_FEE;
    uint256 public constant TIME_LIMIT = 12 hours;
    
    // Mapping to store last GM timestamp for each user
    mapping(address => uint256) public lastGMTimestamp;
    
    // Event for tracking GMs
    event OnChainGMEvent(address indexed sender);
    
    constructor() {
        feeRecipient = 0x18Ffe0eF3ab518d59E29d672FDdEF0d0131578A0;
        GM_FEE = 0.0000029 ether;
    }
    
    // Gas optimized GM function with timestamp check
    function onChainGM() external payable {
        if (msg.value != GM_FEE) {
            revert("Incorrect ETH fee");
        }
        
        // Check if 24 hours have passed since last GM
        if (!(block.timestamp >= lastGMTimestamp[msg.sender] + TIME_LIMIT || lastGMTimestamp[msg.sender] == 0)) {
            revert("Wait 12 hours");
        }
        
        // Update last GM timestamp
        lastGMTimestamp[msg.sender] = block.timestamp;
        
        // Transfer fee after all checks
        (bool success,) = feeRecipient.call{value: msg.value}("");
        if (!success) {
            revert("Fee transfer failed");
        }
        
        emit OnChainGMEvent(msg.sender);
    }
    
    // View function to check remaining time
    function timeUntilNextGM(address user) external view returns (uint256) {
        if (lastGMTimestamp[user] == 0) return 0;
        
        uint256 timePassed = block.timestamp - lastGMTimestamp[user];
        if (timePassed >= TIME_LIMIT) return 0;
        
        return TIME_LIMIT - timePassed;
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"OnChainGMEvent","type":"event"},{"inputs":[],"name":"GM_FEE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TIME_LIMIT","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feeRecipient","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastGMTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"onChainGM","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"timeUntilNextGM","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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

0x608060405260043610610054575f3560e01c806346904840146100585780635011b71c146100a8578063698224ae146100b25780636bb6979f146100d55780638928a1d6146100f4578063e3ea4c4d1461011f575b5f5ffd5b348015610063575f5ffd5b5061008b7f00000000000000000000000018ffe0ef3ab518d59e29d672fddef0d0131578a081565b6040516001600160a01b0390911681526020015b60405180910390f35b6100b0610152565b005b3480156100bd575f5ffd5b506100c761a8c081565b60405190815260200161009f565b3480156100e0575f5ffd5b506100c76100ef366004610388565b61031b565b3480156100ff575f5ffd5b506100c761010e366004610388565b5f6020819052908152604090205481565b34801561012a575f5ffd5b506100c77f000000000000000000000000000000000000000000000000000002a33578480081565b7f000000000000000000000000000000000000000000000000000002a33578480034146101ba5760405162461bcd60e51b8152602060048201526011602482015270496e636f7272656374204554482066656560781b60448201526064015b60405180910390fd5b335f908152602081905260409020546101d69061a8c0906103c2565b421015806101f05750335f90815260208190526040902054155b61022c5760405162461bcd60e51b815260206004820152600d60248201526c5761697420313220686f75727360981b60448201526064016101b1565b335f90815260208190526040808220429055516001600160a01b037f00000000000000000000000018ffe0ef3ab518d59e29d672fddef0d0131578a0169034908381818185875af1925050503d805f81146102a2576040519150601f19603f3d011682016040523d82523d5f602084013e6102a7565b606091505b50509050806102ee5760405162461bcd60e51b8152602060048201526013602482015272119959481d1c985b9cd9995c8819985a5b1959606a1b60448201526064016101b1565b60405133907f2c87d8ee91bb31c46c18656ab95c2c8175461ed9884084ef1ac6d7d029ac815b905f90a250565b6001600160a01b0381165f90815260208190526040812054810361034057505f919050565b6001600160a01b0382165f9081526020819052604081205461036290426103db565b905061a8c0811061037557505f92915050565b6103818161a8c06103db565b9392505050565b5f60208284031215610398575f5ffd5b81356001600160a01b0381168114610381575f5ffd5b634e487b7160e01b5f52601160045260245ffd5b808201808211156103d5576103d56103ae565b92915050565b818103818111156103d5576103d56103ae56fea26469706673582212200692473dbc6ca087e5de845c4b5570342ca0def59cec0f04da59f2861d02b68464736f6c634300081c0033

131:1710:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;209:37;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;178:32:1;;;160:51;;148:2;133:18;209:37:0;;;;;;;;749:720;;;:::i;:::-;;291:45;;;;;;;;;;;;328:8;291:45;;;;;368:25:1;;;356:2;341:18;291:45:0;222:177:1;1527:311:0;;;;;;;;;;-1:-1:-1;1527:311:0;;;;;:::i;:::-;;:::i;406:50::-;;;;;;;;;;-1:-1:-1;406:50:0;;;;;:::i;:::-;;;;;;;;;;;;;;;253:31;;;;;;;;;;;;;;;749:720;815:6;802:9;:19;798:79;;838:27;;-1:-1:-1;;;838:27:0;;897:2:1;838:27:0;;;879:21:1;936:2;916:18;;;909:30;-1:-1:-1;;;955:18:1;;;948:47;1012:18;;838:27:0;;;;;;;;798:79;994:10;978:15;:27;;;;;;;;;;;:40;;328:8;;978:40;:::i;:::-;959:15;:59;;:95;;;-1:-1:-1;1038:10:0;1022:15;:27;;;;;;;;;;;:32;959:95;953:154;;1072:23;;-1:-1:-1;;;1072:23:0;;1505:2:1;1072:23:0;;;1487:21:1;1544:2;1524:18;;;1517:30;-1:-1:-1;;;1563:18:1;;;1556:43;1616:18;;1072:23:0;1303:337:1;953:154:0;1180:10;1164:15;:27;;;;;;;;;;;1194:15;1164:45;;1290:39;-1:-1:-1;;;;;1290:12:0;:17;;1315:9;;1164:15;1290:39;1164:15;1290:39;1315:9;1290:17;:39;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;1272:57;;;1345:7;1340:70;;1369:29;;-1:-1:-1;;;1369:29:0;;2057:2:1;1369:29:0;;;2039:21:1;2096:2;2076:18;;;2069:30;-1:-1:-1;;;2115:18:1;;;2108:49;2174:18;;1369:29:0;1855:343:1;1340:70:0;1435:26;;1450:10;;1435:26;;;;;787:682;749:720::o;1527:311::-;-1:-1:-1;;;;;1613:21:0;;1589:7;1613:21;;;;;;;;;;;:26;;1609:40;;-1:-1:-1;1648:1:0;;1527:311;-1:-1:-1;1527:311:0:o;1609:40::-;-1:-1:-1;;;;;1709:21:0;;1670:18;1709:21;;;;;;;;;;;1691:39;;:15;:39;:::i;:::-;1670:60;;328:8;1745:10;:24;1741:38;;-1:-1:-1;1778:1:0;;1527:311;-1:-1:-1;;1527:311:0:o;1741:38::-;1807:23;1820:10;328:8;1807:23;:::i;:::-;1800:30;1527:311;-1:-1:-1;;;1527:311:0:o;404:286:1:-;463:6;516:2;504:9;495:7;491:23;487:32;484:52;;;532:1;529;522:12;484:52;558:23;;-1:-1:-1;;;;;610:31:1;;600:42;;590:70;;656:1;653;646:12;1041:127;1102:10;1097:3;1093:20;1090:1;1083:31;1133:4;1130:1;1123:15;1157:4;1154:1;1147:15;1173:125;1238:9;;;1259:10;;;1256:36;;;1272:18;;:::i;:::-;1173:125;;;;:::o;2203:128::-;2270:9;;;2291:11;;;2288:37;;;2305:18;;:::i

ipfs://0692473dbc6ca087e5de845c4b5570342ca0def59cec0f04da59f2861d02b684