Add agreed universal verifier solution

contracts/verifiers/UniversalVerifierMultiQuery_AgreedSolution.sol

@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-3.0
+pragma solidity 0.8.27;
+
+import {IRequestValidator} from "../interfaces/IRequestValidator.sol";
+import {IState} from "../interfaces/IState.sol";
+import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
+import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
+
+contract UniversalVerifierMultiQuery is Ownable2StepUpgradeable {
+    struct Request {
+        string metadata;
+        IRequestValidator validator;
+        bytes params;
+    }
+
+    function setRequest(
+        uint256 requestId,
+        Request calldata request
+    ) public checkRequestExistence(requestId, false) {
+        // only existing logic
+        // + requestId validation logic (to be defined)
+    }
+
+    function setAuthRequest(
+        uint256 requestId,
+        Request calldata request
+    ) public checkRequestExistence(requestId, true) onlyOwner {
+        // similar to regular request existing logic
+        // but need to think about the authRequests ids validation
+        // reuse a special byte in the requestId for that maybe
+
+        // Note: there will be two auth requests pre-set at deploy time
+        // (a) authV2 circuit based and (b) eth-based
+    }
+
+    struct Response {
+        uint256 requestId;
+        bytes proof;
+        bytes metadata;
+    }
+
+    struct ResponseField {
+        uint256 name;
+        uint256 value;
+    }
+
+    function submitResponse(Response[] memory responses, bytes memory crossChainProofs) public {
+        // 1. Check for auth responses (throw if not provided exactly 1)
+        //      and remember the userID from the response
+        // 2. Process crossChainProofs
+        // 3. Verify regular responses, write proof results (under the userID key from the step 1),
+        //      emit events (existing logic)
+    }
+
+    struct Query {
+        uint256[] requestIds;
+        bytes metadata; //TODO do we need it?
+    }
+
+    function setQuery(
+        uint256 queryId,
+        Query calldata query
+    ) public {
+        //TODO implement
+    }
+
+    function getQueryStatus(uint256 queryId, address userAddress) public view returns (Query memory) {
+        //TODO implement
+        // 1. Get the latest userId by the userAddress arg (in the mapping)
+        // 2. Check if all requests statuses are true for the userId
+        // 2. Check if any active auth for the userId is true
+
+
+        // NOTE: its possible to implement function getQueryStatus(queryId, userAddress, userId)
+        // as the data structures have the information but it would be a bit redundant for now
+        return new Query();
+    }
+
+
+//a1 => u1
+//a1 => u2
+
+//    a1 => u1 => true
+//    a1 => u2 => true
+
+    struct Proof {
+        bool isVerified;
+        mapping(string key => uint256 inputValue) storageFields;
+        string validatorVersion;
+        uint256 blockTimestamp;
+        mapping(string key => bytes) metadata;
+    }
+
+    /// @custom:storage-location erc7201:iden3.storage.UniversalVerifierMultiQuery
+    struct UniversalVerifierMultiQueryStorage {
+        // Information about requests
+        mapping(uint256 requestId => mapping(uint256 userID => Proof)) _proofs;
+        mapping(uint256 requestId => Request) _requests;
+        uint256[] _requestIds;
+        IState _state;
+        // Information about multi-queries
+        mapping(uint256 queryId => Query) _queries;
+        uint256[] _queryIds;
+        // Information linked between users and their addresses
+        // TODO think about arrays for these two mappings
+        mapping(address userAddress => uint256 userID) _user_address_to_id;
+        mapping(uint256 userID => address userAddress) _id_to_user_address;
+        mapping(uint256 userID => mapping(address userAddress => bool hasAuth)) _user_id_and_address_auth;
+
+        uint256[] _authRequestIds; // reuses the same _requests mapping to store the auth requests
+    }
+}