chore(lazer) EVM Contract cleanup

lazer/contracts/evm/src/PythLazer.sol

@@ -71,7 +71,7 @@ contract PythLazer is OwnableUpgradeable, UUPSUpgradeable {
 
     function verifyUpdate(
         bytes calldata update
-    ) external payable returns (bytes calldata payload, address signer) {
+    ) public payable returns (bytes calldata payload, address signer) {
         // Require fee and refund excess
         require(msg.value >= verification_fee, "Insufficient fee provided");
         if (msg.value > verification_fee) {
@@ -120,45 +120,13 @@ contract PythLazer is OwnableUpgradeable, UUPSUpgradeable {
         address signer,
         PythLazerStructs.Update memory parsedUpdate
     ) {
-        // Require fee and refund excess
-        require(msg.value >= verification_fee, "Insufficient fee provided");
-        if (msg.value > verification_fee) {
-            payable(msg.sender).transfer(msg.value - verification_fee);
-        }
-
-        if (update.length < 71) {
-            revert("input too short");
-        }
-        uint32 EVM_FORMAT_MAGIC = 706910618;
-
-        uint32 evm_magic = uint32(bytes4(update[0:4]));
-        if (evm_magic != EVM_FORMAT_MAGIC) {
-            revert("invalid evm magic");
-        }
-        uint16 payload_len = uint16(bytes2(update[69:71]));
-        if (update.length < 71 + payload_len) {
-            revert("input too short");
-        }
-        payload = update[71:71 + payload_len];
-        bytes32 hash = keccak256(payload);
-        (signer, , ) = ECDSA.tryRecover(
-            hash,
-            uint8(update[68]) + 27,
-            bytes32(update[4:36]),
-            bytes32(update[36:68])
-        );
-        if (signer == address(0)) {
-            revert("invalid signature");
-        }
-        if (!isValidSigner(signer)) {
-            revert("invalid signer");
-        }
+        (payload, signer) = verifyUpdate(update);
 
         // Parse the verified payload
         parsedUpdate = PythLazerLib.parseUpdateFromPayload(payload);
     }
 
     function version() public pure returns (string memory) {
-        return "0.1.1";
+        return "0.2.0";
     }
 }

lazer/contracts/evm/src/PythLazerLib.sol

@@ -192,7 +192,7 @@ library PythLazerLib {
     }
 
 
-       // Helper functions for existence checks
+    // Helper functions for existence checks
 
     /// @notice Check if price exists
     function hasPrice(PythLazerStructs.Feed memory feed) public pure returns (bool) {