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// SPDX-License-Identifier: AGPL-3.0-or-later

/// ServiceRegistry.sol

// Copyright (C) 2021-2021 Oazo Apps Limited

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
pragma solidity ^0.8.0;

contract ServiceRegistry {
    uint256 public constant MAX_DELAY = 30 days;

    mapping(bytes32 => uint256) public lastExecuted;
    mapping(bytes32 => address) private namedService;
    mapping(bytes32 => bool) private invalidHashes;
    address public owner;
    uint256 public requiredDelay;

    modifier validateInput(uint256 len) {
        require(msg.data.length == len, "registry/illegal-padding");
        _;
    }

    modifier delayedExecution() {
        bytes32 operationHash = keccak256(msg.data);
        uint256 reqDelay = requiredDelay;

        /* solhint-disable not-rely-on-time */
        if (lastExecuted[operationHash] == 0 && reqDelay > 0) {
            // not called before, scheduled for execution
            lastExecuted[operationHash] = block.timestamp;
            emit ChangeScheduled(operationHash, block.timestamp + reqDelay, msg.data);
        } else {
            require(
                block.timestamp - reqDelay > lastExecuted[operationHash],
                "registry/delay-too-small"
            );
            emit ChangeApplied(operationHash, block.timestamp, msg.data);
            _;
            lastExecuted[operationHash] = 0;
        }
        /* solhint-enable not-rely-on-time */
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "registry/only-owner");
        _;
    }

    constructor(uint256 initialDelay) {
        require(initialDelay <= MAX_DELAY, "registry/invalid-delay");
        requiredDelay = initialDelay;
        owner = msg.sender;
    }

    function transferOwnership(
        address newOwner
    ) external onlyOwner validateInput(36) delayedExecution {
        owner = newOwner;
    }

    function changeRequiredDelay(
        uint256 newDelay
    ) external onlyOwner validateInput(36) delayedExecution {
        require(newDelay <= MAX_DELAY, "registry/invalid-delay");
        requiredDelay = newDelay;
    }

    function getServiceNameHash(string memory name) external pure returns (bytes32) {
        return keccak256(abi.encodePacked(name));
    }

    function addNamedService(
        bytes32 serviceNameHash,
        address serviceAddress
    ) external onlyOwner validateInput(68) delayedExecution {
        require(invalidHashes[serviceNameHash] == false, "registry/service-name-used-before");
        require(namedService[serviceNameHash] == address(0), "registry/service-override");
        namedService[serviceNameHash] = serviceAddress;
        emit NamedServiceAdded(serviceNameHash, serviceAddress);
    }

    function removeNamedService(bytes32 serviceNameHash) external onlyOwner validateInput(36) {
        require(namedService[serviceNameHash] != address(0), "registry/service-does-not-exist");
        namedService[serviceNameHash] = address(0);
        invalidHashes[serviceNameHash] = true;
        emit NamedServiceRemoved(serviceNameHash);
    }

    function getRegisteredService(string memory serviceName) external view returns (address) {
        return namedService[keccak256(abi.encodePacked(serviceName))];
    }

    function getServiceAddress(bytes32 serviceNameHash) external view returns (address) {
        return namedService[serviceNameHash];
    }

    function clearScheduledExecution(
        bytes32 scheduledExecution
    ) external onlyOwner validateInput(36) {
        require(lastExecuted[scheduledExecution] > 0, "registry/execution-not-scheduled");
        lastExecuted[scheduledExecution] = 0;
        emit ChangeCancelled(scheduledExecution);
    }

    event ChangeScheduled(bytes32 dataHash, uint256 scheduledFor, bytes data);
    event ChangeApplied(bytes32 dataHash, uint256 appliedAt, bytes data);
    event ChangeCancelled(bytes32 dataHash);
    event NamedServiceRemoved(bytes32 nameHash);
    event NamedServiceAdded(bytes32 nameHash, address service);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"uint256","name":"initialDelay","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"dataHash","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"appliedAt","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"ChangeApplied","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"dataHash","type":"bytes32"}],"name":"ChangeCancelled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"dataHash","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"scheduledFor","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"ChangeScheduled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"nameHash","type":"bytes32"},{"indexed":false,"internalType":"address","name":"service","type":"address"}],"name":"NamedServiceAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"nameHash","type":"bytes32"}],"name":"NamedServiceRemoved","type":"event"},{"inputs":[],"name":"MAX_DELAY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"serviceNameHash","type":"bytes32"},{"internalType":"address","name":"serviceAddress","type":"address"}],"name":"addNamedService","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newDelay","type":"uint256"}],"name":"changeRequiredDelay","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"scheduledExecution","type":"bytes32"}],"name":"clearScheduledExecution","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"serviceName","type":"string"}],"name":"getRegisteredService","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"serviceNameHash","type":"bytes32"}],"name":"getServiceAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"}],"name":"getServiceNameHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"lastExecuted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"serviceNameHash","type":"bytes32"}],"name":"removeNamedService","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"requiredDelay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000000000000000000000000000000000000000000708

-----Decoded View---------------
Arg [0] : initialDelay (uint256): 1800

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000708