# src/RastakhState.sol

**URL:** <https://builder.metamask.io/t/src-rastakhstate-sol/3552>\
**Category:** MetaMask Ambassadors\
**Created:** [September 19, 2026, 5:44am UTC](https://builder.metamask.io/t/src-rastakhstate-sol/3552 "2026-09-19T05:44:15Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Sje\_azad](https://yyz1.discourse-cdn.com/flex011/user_avatar/builder.metamask.io/sje_azad/32/4003_2.png) [@Sje\_azad](https://builder.metamask.io/u/Sje_azad)\
**Post date:** [September 19, 2026, 5:44am UTC](https://builder.metamask.io/t/src-rastakhstate-sol/3552/1 "2026-09-19T05:44:15Z")

</div>

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.20;

/// @title RastakhState - هسته‌ی همگام‌سازی وضعیت

/// @notice فقط اپراتور می‌تواند state hash را ثبت کند

contract RastakhState {

```
address public immutable operator;

mapping(bytes32 => bool) public synchronizedStates;

event StateSynced(bytes32 indexed stateHash, address indexed caller, uint256 timestamp);

error NotOperator();

error AlreadySynced();

error ZeroHash();

constructor(address \_operator) {

    require(\_operator != address(0), "Zero operator");

    operator = \_operator;

}

/// @notice ثبت یک state hash روی زنجیره

function syncState(bytes32 \_stateHash) external {

    if (msg.sender != operator) revert NotOperator();

    if (\_stateHash == bytes32(0)) revert ZeroHash();

    if (synchronizedStates\[\_stateHash\]) revert AlreadySynced();

    synchronizedStates\[\_stateHash\] = true;

    emit StateSynced(\_stateHash, msg.sender, block.timestamp);

}

/// @notice بررسی اینکه آیا یک hash قبلاً سینک شده

function isSynced(bytes32 \_stateHash) external view returns (bool) {

    return synchronizedStates\[\_stateHash\];

}

```

}