Create DecentHats contract, and some helpers

contracts/DecentHats.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity =0.8.19;
+
+import { Enum } from "@gnosis.pm/zodiac/contracts/core/Module.sol";
+import { IAvatar } from "@gnosis.pm/zodiac/contracts/interfaces/IAvatar.sol";
+import { IHats } from "./interfaces/hats/IHats.sol";
+import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";
+
+contract DecentHats {
+    IHats public hats;
+    address public keyValuePairs;
+
+    constructor(IHats _hats, address _keyValuePairs) {
+        hats = _hats;
+        keyValuePairs = _keyValuePairs;
+    }
+
+    function createAndDeclareTree(string memory _details, string memory _imageURI) public returns (bool success) {
+        uint256 topHatId = hats.mintTopHat(msg.sender, _details, _imageURI);
+
+        string[] memory keys = new string[](1);
+        keys[0] = "hatsTreeId";
+
+        string[] memory values = new string[](1);
+        values[0] = Strings.toString(topHatId);
+
+        success = IAvatar(msg.sender).execTransactionFromModule(
+            keyValuePairs,
+            0,
+            abi.encodeWithSignature("updateValues(string[],string[])", keys, values),
+            Enum.Operation.Call
+        );
+
+        return success;
+    }
+}

contracts/interfaces/hats/IHats.sol

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+// SPDX-License-Identifier: AGPL-3.0
+// Copyright (C) 2023 Haberdasher Labs
+//
+// 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 >=0.8.13;
+
+interface IHats {
+    function mintTopHat(address _target, string memory _details, string memory _imageURI)
+        external
+        returns (uint256 topHatId);
+}

contracts/mock/MockHats.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity =0.8.19;
+
+import { IHats } from "../interfaces/hats/IHats.sol";
+
+contract MockHats is IHats {
+    uint256 count = 0;
+
+    function mintTopHat(address, string memory, string memory) external returns (uint256 topHatId) {
+        topHatId = count;
+        count++;
+    }
+}