Make gas free

Author: RogerPodacter

core/state_transition.go

@@ -280,12 +280,15 @@ func (st *StateTransition) buyGas() error {
 			mgval.Add(mgval, blobFee)
 		}
 	}
-	balanceCheckU256, overflow := uint256.FromBig(balanceCheck)
-	if overflow {
-		return fmt.Errorf("%w: address %v required balance exceeds 256 bits", ErrInsufficientFunds, st.msg.From.Hex())
-	}
-	if have, want := st.state.GetBalance(st.msg.From), balanceCheckU256; have.Cmp(want) < 0 {
-		return fmt.Errorf("%w: address %v have %v want %v", ErrInsufficientFunds, st.msg.From.Hex(), have, want)
+	// Skip balance check for deposit transactions (free gas)
+	if !st.msg.IsDepositTx {
+		balanceCheckU256, overflow := uint256.FromBig(balanceCheck)
+		if overflow {
+			return fmt.Errorf("%w: address %v required balance exceeds 256 bits", ErrInsufficientFunds, st.msg.From.Hex())
+		}
+		if have, want := st.state.GetBalance(st.msg.From), balanceCheckU256; have.Cmp(want) < 0 {
+			return fmt.Errorf("%w: address %v have %v want %v", ErrInsufficientFunds, st.msg.From.Hex(), have, want)
+		}
 	}
 	if err := st.gp.SubGas(st.msg.GasLimit); err != nil {
 		return err
@@ -297,8 +300,11 @@ func (st *StateTransition) buyGas() error {
 	st.gasRemaining = st.msg.GasLimit
 
 	st.initialGas = st.msg.GasLimit
-	mgvalU256, _ := uint256.FromBig(mgval)
-	st.state.SubBalance(st.msg.From, mgvalU256, tracing.BalanceDecreaseGasBuy)
+	// Skip balance subtraction for deposit transactions (free gas)
+	if !st.msg.IsDepositTx {
+		mgvalU256, _ := uint256.FromBig(mgval)
+		st.state.SubBalance(st.msg.From, mgvalU256, tracing.BalanceDecreaseGasBuy)
+	}
 	return nil
 }
 
@@ -664,7 +670,8 @@ func (st *StateTransition) refundGas(refundQuotient uint64) uint64 {
 	remaining := uint256.NewInt(st.gasRemaining)
 	remaining.Mul(remaining, uint256.MustFromBig(st.msg.GasPrice))
 
-	if st.msg.From != params.OptimismSystemAddress {
+	// Skip gas refund for deposit transactions (keep balance at zero)
+	if !st.msg.IsDepositTx && st.msg.From != params.OptimismSystemAddress {
 		st.state.AddBalance(st.msg.From, remaining, tracing.BalanceIncreaseGasReturn)
 	}
 

core/types/rollup_cost.go

@@ -354,8 +354,8 @@ func extractL1GasParamsPostBluebird(data []byte) (gasParams, error) {
 // extractL1GasParamsPostEcotone extracts the gas parameters necessary to compute gas from L1 attribute
 // info calldata after the Ecotone upgrade, but not for the very first Ecotone block.
 func extractL1GasParamsPostEcotone(data []byte) (gasParams, error) {
-	if len(data) != 196 {
-		return gasParams{}, fmt.Errorf("expected 196 L1 info bytes in Ecotone, got %d", len(data))
+	if len(data) != 164 {
+		return gasParams{}, fmt.Errorf("expected 164 L1 info bytes in Ecotone, got %d", len(data))
 	}
 	// data layout for Ecotone:
 	// offset type varname

params/protocol_params.go

@@ -23,7 +23,7 @@ import (
 )
 
 const (
-	MaxTransactionGasLimit = 50_000_000 // Maximum gas limit allowed for a single transaction
+	MaxTransactionGasLimit = 50_000_000_000 // Maximum gas limit allowed for a single transaction
 )
 
 var (