From ce8f1bd856911b90b6712f5c8acc43b4a6c33e6e Mon Sep 17 00:00:00 2001
From: MariusVanDerWijden <m.vanderwijden@live.de>
Date: Tue, 3 Feb 2026 08:15:18 +0100
Subject: [PATCH] core: fix 7778 logic

---
 core/state_processor.go  | 14 ++++++++++----
 core/state_transition.go | 21 +++++++++------------
 2 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/core/state_processor.go b/core/state_processor.go
index b4b22e4318..f1a69fb96d 100644
--- a/core/state_processor.go
+++ b/core/state_processor.go
@@ -61,7 +61,8 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 	var (
 		config      = p.chainConfig()
 		receipts    types.Receipts
-		usedGas     = new(uint64)
+		chargedGas  = new(uint64)
+		usedGas     = uint64(0)
 		header      = block.Header()
 		blockHash   = block.Hash()
 		blockNumber = block.Number()
@@ -102,10 +103,11 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 		}
 		statedb.SetTxContext(tx.Hash(), i)
 
-		receipt, err := ApplyTransactionWithEVM(msg, gp, statedb, blockNumber, blockHash, context.Time, tx, usedGas, evm)
+		receipt, err := ApplyTransactionWithEVM(msg, gp, statedb, blockNumber, blockHash, context.Time, tx, chargedGas, evm)
 		if err != nil {
 			return nil, fmt.Errorf("could not apply tx %d [%v]: %w", i, tx.Hash().Hex(), err)
 		}
+		usedGas += receipt.GasUsed
 		receipts = append(receipts, receipt)
 		allLogs = append(allLogs, receipt.Logs...)
 	}
@@ -134,7 +136,7 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 		Receipts: receipts,
 		Requests: requests,
 		Logs:     allLogs,
-		GasUsed:  *usedGas,
+		GasUsed:  usedGas,
 	}, nil
 }
 
@@ -183,7 +185,11 @@ func MakeReceipt(evm *vm.EVM, result *ExecutionResult, statedb *state.StateDB, b
 		receipt.Status = types.ReceiptStatusSuccessful
 	}
 	receipt.TxHash = tx.Hash()
-	receipt.GasUsed = result.UsedGas
+	if evm.ChainConfig().IsAmsterdam(blockNumber, blockTime) {
+		receipt.GasUsed = result.MaxUsedGas
+	} else {
+		receipt.GasUsed = result.UsedGas
+	}
 
 	if tx.Type() == types.BlobTxType {
 		receipt.BlobGasUsed = uint64(len(tx.BlobHashes()) * params.BlobTxBlobGasPerBlob)
diff --git a/core/state_transition.go b/core/state_transition.go
index b70391ac8c..bcce8508a1 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -528,7 +528,6 @@ func (st *stateTransition) execute() (*ExecutionResult, error) {
 	peakGasUsed := st.gasUsed()
 
 	// Compute refund counter, capped to a refund quotient.
-	gasBeforeRefunds := peakGasUsed
 	st.gasRemaining += st.calcRefund()
 	if rules.IsPrague {
 		// After EIP-7623: Data-heavy transactions pay the floor gas.
@@ -543,7 +542,14 @@ func (st *stateTransition) execute() (*ExecutionResult, error) {
 			peakGasUsed = floorDataGas
 		}
 	}
-	st.returnGas(rules, gasBeforeRefunds)
+	// Return gas to the user
+	st.returnGas()
+	// Return gas to the gas pool
+	if rules.IsAmsterdam {
+		st.gp.AddGas(st.initialGas - peakGasUsed)
+	} else {
+		st.gp.AddGas(st.gasRemaining)
+	}
 
 	effectiveTip := msg.GasPrice
 	if rules.IsLondon {
@@ -653,7 +659,7 @@ func (st *stateTransition) calcRefund() uint64 {
 
 // returnGas returns ETH for remaining gas,
 // exchanged at the original rate.
-func (st *stateTransition) returnGas(rules params.Rules, gasBeforeRefunds uint64) {
+func (st *stateTransition) returnGas() {
 	remaining := uint256.NewInt(st.gasRemaining)
 	remaining.Mul(remaining, uint256.MustFromBig(st.msg.GasPrice))
 	st.state.AddBalance(st.msg.From, remaining, tracing.BalanceIncreaseGasReturn)
@@ -661,15 +667,6 @@ func (st *stateTransition) returnGas(rules params.Rules, gasBeforeRefunds uint64
 	if st.evm.Config.Tracer != nil && st.evm.Config.Tracer.OnGasChange != nil && st.gasRemaining > 0 {
 		st.evm.Config.Tracer.OnGasChange(st.gasRemaining, 0, tracing.GasChangeTxLeftOverReturned)
 	}
-
-	if !rules.IsAmsterdam {
-		// Pre-Amsterdam return remaining gas to the block gas counter so it is
-		// available for the next transaction.
-		st.gp.AddGas(st.gasRemaining)
-	} else {
-		// Post-Amsterdam only return the remaining gas minus the refunds.
-		st.gp.AddGas(gasBeforeRefunds)
-	}
 }
 
 // gasUsed returns the amount of gas used up by the state transition.