From 579dd8b27db2af4a6603767863cd00f43b993662 Mon Sep 17 00:00:00 2001
From: Galaxy <30950645+GalaxySciTech@users.noreply.github.com>
Date: Mon, 27 May 2024 14:24:03 +0400
Subject: [PATCH] update

---
 contracts/FullCheckpoint.sol                |  9 ++++----
 contracts/ReverseFullCheckpoint.sol         | 23 ++++++---------------
 contracts/libraries/ReverseHeaderReader.sol |  2 +-
 3 files changed, 12 insertions(+), 22 deletions(-)

diff --git a/contracts/FullCheckpoint.sol b/contracts/FullCheckpoint.sol
index 2571b1a..ed6a57b 100644
--- a/contracts/FullCheckpoint.sol
+++ b/contracts/FullCheckpoint.sol
@@ -131,15 +131,16 @@ contract FullCheckpoint {
                     ),
                 "Old Block"
             );
+            Header memory header = headerTree[validationParams.parentHash];
             require(
-                headerTree[validationParams.parentHash].mix != 0,
+                header.mix != 0,
                 "Parent Missing"
             );
             require(
                 int256(
                     uint256(
                         uint64(
-                            headerTree[validationParams.parentHash].mix >> 128
+                            header.mix >> 128
                         )
                     )
                 ) +
@@ -148,12 +149,12 @@ contract FullCheckpoint {
                 "Invalid N"
             );
             require(
-                uint64(headerTree[validationParams.parentHash].mix >> 64) <
+                uint64(header.mix >> 64) <
                     validationParams.roundNumber,
                 "Invalid RN"
             );
             require(
-                uint64(headerTree[validationParams.parentHash].mix >> 64) ==
+                uint64(header.mix >> 64) ==
                     validationParams.prevRoundNumber,
                 "Invalid PRN"
             );
diff --git a/contracts/ReverseFullCheckpoint.sol b/contracts/ReverseFullCheckpoint.sol
index aef12f3..9314636 100644
--- a/contracts/ReverseFullCheckpoint.sol
+++ b/contracts/ReverseFullCheckpoint.sol
@@ -4,7 +4,7 @@ pragma solidity =0.8.19;
 import {ReverseHeaderReader as HeaderReader} from "./libraries/ReverseHeaderReader.sol";
 
 contract ReverseFullCheckpoint {
-    // Compressed subnet header information stored on chain
+    // Compressed mainnet header information stored on chain
     struct Header {
         bytes32 stateRoot;
         bytes32 transactionsRoot;
@@ -118,30 +118,19 @@ contract ReverseFullCheckpoint {
                     ),
                 "Old Block"
             );
+            Header memory header = headerTree[validationParams.parentHash];
+            require(header.mix != 0, "Parent Missing");
             require(
-                headerTree[validationParams.parentHash].mix != 0,
-                "Parent Missing"
-            );
-            require(
-                int256(
-                    uint256(
-                        uint64(
-                            headerTree[validationParams.parentHash].mix >> 128
-                        )
-                    )
-                ) +
-                    1 ==
+                int256(uint256(uint64(header.mix >> 128))) + 1 ==
                     validationParams.number,
                 "Invalid N"
             );
             require(
-                uint64(headerTree[validationParams.parentHash].mix >> 64) <
-                    validationParams.roundNumber,
+                uint64(header.mix >> 64) < validationParams.roundNumber,
                 "Invalid RN"
             );
             require(
-                uint64(headerTree[validationParams.parentHash].mix >> 64) ==
-                    validationParams.prevRoundNumber,
+                uint64(header.mix >> 64) == validationParams.prevRoundNumber,
                 "Invalid PRN"
             );
 
diff --git a/contracts/libraries/ReverseHeaderReader.sol b/contracts/libraries/ReverseHeaderReader.sol
index dd7717a..075ed59 100644
--- a/contracts/libraries/ReverseHeaderReader.sol
+++ b/contracts/libraries/ReverseHeaderReader.sol
@@ -175,7 +175,7 @@ library ReverseHeaderReader {
 
     /*
      * @param rlp-encoded block header.
-     * @return (currentValidator list, nextValidator list).
+     * @return (nextValidator list).
      */
     function getEpoch(
         bytes memory header