Chore/upgrade mainnets

contracts/data/WitnetBoardData.sol

@@ -39,6 +39,11 @@ abstract contract WitnetBoardData {
         _;
     }
 
+    modifier onlyRequester(uint256 _queryId) {
+      require(__query(_queryId).from == msg.sender, "WitnetRequestBoard: only the requester");
+      _;
+    }
+
     /// Asserts the give query was actually posted before calling this method.
     modifier wasPosted(uint256 _queryId) {
         require(_queryId > 0 && _queryId <= __storage().numQueries, "WitnetRequestBoard: not yet posted");

contracts/impls/apps/WitnetPriceFeedsUpgradable.sol

@@ -90,8 +90,8 @@ contract WitnetPriceFeedsUpgradable
         if (__storage().defaultSlaHash == 0) {
             settleDefaultRadonSLA(WitnetV2.RadonSLA({
                 numWitnesses: 5,
-                witnessCollateral: 15 * 10 ** 9,
-                witnessReward: 15 * 10 ** 7,
+                witnessCollateral: 20 * 10 ** 9,
+                witnessReward: 2 * 10 ** 8,
                 minerCommitRevealFee: 10 ** 7,
                 minConsensusPercentage: 51
             }));

contracts/impls/apps/WitnetRandomnessProxiable.sol

@@ -490,8 +490,8 @@ contract WitnetRandomnessProxiable
         settleWitnetRandomnessSLA(WitnetV2.RadonSLA({
             numWitnesses: 5,
             minConsensusPercentage: 51,
-            witnessReward: 10 ** 8,
-            witnessCollateral: 10 ** 9,
+            witnessReward: 2 * 10 ** 8,
+            witnessCollateral: 2 * 10 ** 9,
             minerCommitRevealFee: 10 ** 7
         }));
     }

contracts/impls/core/customs/WitnetRequestBoardTrustableBase.sol

@@ -620,8 +620,8 @@ abstract contract WitnetRequestBoardTrustableBase
     /// @dev or deleted.
     /// @param _queryId The unique identifier of a previously posted query.
     function readRequest(uint256 _queryId)
-        external view
-        override
+        public view
+        virtual override
         inStatus(_queryId, Witnet.QueryStatus.Posted)
         returns (Witnet.Request memory _request)
     {
@@ -684,8 +684,8 @@ abstract contract WitnetRequestBoardTrustableBase
     /// @dev Fails if the `_queryId` is not in 'Reported' status.
     /// @param _queryId The unique query identifier
     function readResponse(uint256 _queryId)
-        external view
-        override
+        public view
+        virtual override
         inStatus(_queryId, Witnet.QueryStatus.Reported)
         returns (Witnet.Response memory _response)
     {
@@ -720,8 +720,8 @@ abstract contract WitnetRequestBoardTrustableBase
     /// @dev Fails if the `_queryId` is not in 'Reported' status.
     /// @param _queryId The unique query identifier
     function readResponseResult(uint256 _queryId)
-        external view
-        override
+        public view
+        virtual override
         inStatus(_queryId, Witnet.QueryStatus.Reported)
         returns (Witnet.Result memory)
     {

contracts/impls/core/customs/WitnetRequestBoardTrustableObscuro.sol

@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: MIT
+
+/* solhint-disable var-name-mixedcase */
+
+pragma solidity >=0.7.0 <0.9.0;
+pragma experimental ABIEncoderV2;
+
+import "../WitnetRequestBoardTrustableDefault.sol";
+
+/// @title Witnet Request Board "trustable" implementation contract.
+/// @notice Contract to bridge requests to Witnet Decentralized Oracle Network.
+/// @dev This contract enables posting requests that Witnet bridges will insert into the Witnet network.
+/// The result of the requests will be posted back to this contract by the bridge nodes too.
+/// @author The Witnet Foundation
+contract WitnetRequestBoardTrustableObscuro
+    is 
+        WitnetRequestBoardTrustableDefault
+{
+    constructor(
+            WitnetRequestFactory _factory,
+            bool _upgradable,
+            bytes32 _versionTag,
+            uint256 _reportResultGasLimit
+        )
+        WitnetRequestBoardTrustableDefault(
+            _factory, 
+            _upgradable, 
+            _versionTag,
+            _reportResultGasLimit
+        )
+    {}
+
+    // ================================================================================================================
+    // --- Overrides implementation of 'IWitnetRequestBoardView' ------------------------------------------------------
+
+    /// @notice Retrieves the whole Request record posted to the Witnet Request Board.
+    /// @dev Fails if the `_queryId` is not valid or, if it has already been reported
+    /// @dev or deleted, or if `msg.sender` is not the actual requester.
+    /// @param _queryId The unique identifier of a previously posted query.
+    function readRequest(uint256 _queryId)
+        public view 
+        virtual override
+        onlyRequester(_queryId)
+        returns (Witnet.Request memory)
+    {
+        return WitnetRequestBoardTrustableBase.readRequest(_queryId);
+    }
+
+    /// Retrieves the Witnet-provided result, and metadata, to a previously posted request.    
+    /// @dev Fails if the `_queryId` is not in 'Reported' status, or if `msg.sender` is not the actual requester.
+    /// @param _queryId The unique query identifier
+    function readResponse(uint256 _queryId)
+        public view
+        virtual override
+        onlyRequester(_queryId)
+        returns (Witnet.Response memory _response)
+    {
+        return WitnetRequestBoardTrustableBase.readResponse(_queryId);
+    }
+
+    /// Retrieves the Witnet-provided CBOR-bytes result of a previously posted request.
+    /// @dev Fails if the `_queryId` is not in 'Reported' status, or if `msg.sender` is not the actual requester.
+    /// @param _queryId The unique query identifier
+    function readResponseResult(uint256 _queryId)
+        public view
+        virtual override
+        onlyRequester(_queryId)
+        returns (Witnet.Result memory)
+    {
+        return WitnetRequestBoardTrustableBase.readResponseResult(_queryId);
+    }
+
+}