fix: add function based on feedback

contracts/v0.2/src/SubmissionProxy.sol

@@ -450,6 +450,56 @@ contract SubmissionProxy is Ownable {
         }
     }
 
+    // works same as submit, but will only return error if the proof is invalid, ignore if answer is superseded
+    function updatePrices(bytes32[] calldata _feedHashes, int256[] calldata _answers, uint256[] calldata _timestamps, bytes[] calldata _proofs) public {
+        if (
+            _feedHashes.length != _answers.length || _answers.length != _proofs.length
+                || _proofs.length != _timestamps.length || _feedHashes.length > maxSubmission
+        ) {
+            revert InvalidSubmissionLength();
+        }
+
+        uint256 feedsLength_ = _feedHashes.length;
+        for (uint256 i = 0; i < feedsLength_; i++) {
+            updatePrice(_feedHashes[i], _answers[i], _timestamps[i], _proofs[i]);
+        }
+    }
+
+
+    function updatePrice(bytes32 _feedHash, int256 _answer, uint256 _timestamp, bytes calldata _proof) public {
+        if (_timestamp <= (block.timestamp - dataFreshness) * 1000 ) {
+            revert AnswerOutdated();
+        }
+
+        if (lastSubmissionTimes[_feedHash] >= _timestamp) {
+            return;
+        }
+
+        (bytes[] memory proofs_, bool success_) = splitProofs(_proof);
+        if (!success_) {
+            // splitting proofs failed -> do not submit!
+            revert InvalidProofFormat();
+        }
+
+        if (address(feeds[_feedHash]) == address(0)) {
+            // feedHash not registered -> do not submit!
+            revert FeedHashNotFound();
+        }
+
+        if (keccak256(abi.encodePacked(feeds[_feedHash].name())) != _feedHash) {
+            // feedHash not matching with registered feed -> do not submit!
+            revert InvalidFeedHash();
+        }
+
+        bytes32 message_ = keccak256(abi.encodePacked(_answer, _timestamp, _feedHash));
+        if (validateProof(_feedHash, message_, proofs_)) {
+            feeds[_feedHash].submit(_answer);
+            lastSubmissionTimes[_feedHash] = _timestamp;
+        } else {
+            revert InvalidProof();
+        }
+    }
+
     /**
      * @notice Return the version and type of the feed.
      * @return typeAndVersion The type and version of the feed.