From 43ddd22fa8def8211841680f2766162b5881462b Mon Sep 17 00:00:00 2001
From: Mister-EA <elton.antonis@binance.com>
Date: Wed, 19 Apr 2023 12:03:11 +0200
Subject: [PATCH] consensus, misc: remove unnecessary parent gas limit check

---
 consensus/misc/eip1559.go  | 12 +-----------
 consensus/parlia/parlia.go |  3 ---
 2 files changed, 1 insertion(+), 14 deletions(-)

diff --git a/consensus/misc/eip1559.go b/consensus/misc/eip1559.go
index 4e69720ca3..41566ebdc3 100644
--- a/consensus/misc/eip1559.go
+++ b/consensus/misc/eip1559.go
@@ -28,22 +28,12 @@ import (
 // - gas limit check
 // - basefee check
 func VerifyEip1559Header(config *params.ChainConfig, parent, header *types.Header) error {
-	// Verify that the gas limit remains within allowed bounds
-	parentGasLimit := parent.GasLimit
-	if !config.IsLondon(parent.Number) {
-		parentGasLimit = parent.GasLimit * params.ElasticityMultiplier
-	}
-	if err := VerifyGaslimit(parentGasLimit, header.GasLimit); err != nil {
-		return err
-	}
+
 	// Verify the header is not malformed
 	if header.BaseFee == nil {
 		return fmt.Errorf("header is missing baseFee")
 	}
 
-	if header.BaseFee.Cmp(big.NewInt(params.InitialBaseFee)) != 0 {
-		return fmt.Errorf("header has a non-zero baseFee of %v", header.BaseFee)
-	}
 	// Verify the baseFee is correct based on the parent header.
 	expectedBaseFee := CalcBaseFee(config, parent)
 	if header.BaseFee.Cmp(expectedBaseFee) != 0 {
diff --git a/consensus/parlia/parlia.go b/consensus/parlia/parlia.go
index 3c11cb4122..959173e16f 100644
--- a/consensus/parlia/parlia.go
+++ b/consensus/parlia/parlia.go
@@ -560,9 +560,6 @@ func (p *Parlia) verifyHeader(chain consensus.ChainHeaderReader, header *types.H
 		if header.BaseFee != nil {
 			return fmt.Errorf("invalid baseFee before fork: have %d, expected 'nil'", header.BaseFee)
 		}
-		if err := misc.VerifyGaslimit(parent.GasLimit, header.GasLimit); err != nil {
-			return err
-		}
 	} else if err := misc.VerifyEip1559Header(chain.Config(), parent, header); err != nil {
 		// Verify the header's EIP-1559 attributes.
 		return err