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/*
  Copyright 2019-2022 StarkWare Industries Ltd.
  Licensed under the Apache License, Version 2.0 (the "License").
  You may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  https://www.starkware.co/open-source-license/
  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions
  and limitations under the License.
*/
// SPDX-License-Identifier: Apache-2.0.
pragma solidity ^0.6.12;
import "IQueryableFactRegistry.sol";
contract FactRegistry is IQueryableFactRegistry {
    // Mapping: fact hash -> true.
    mapping(bytes32 => bool) private verifiedFact;
    // Indicates whether the Fact Registry has at least one fact registered.
    bool anyFactRegistered = false;
    /*
      Checks if a fact has been verified.
    */
    function isValid(bytes32 fact) external view override returns (bool) {
        return _factCheck(fact);
    }
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