OP stack: use getL1FeeUpperBound for PVG calculations

pkg/gas/pvg.go

@@ -137,7 +137,7 @@ func CalcOptimismPVGWithEthClient(
 		if err != nil {
 			return nil, err
 		}
-		ge, err := gaspriceoracle.GetL1FeeMethod.Inputs.Pack(data)
+		ge, err := gaspriceoracle.GetL1FeeUpperBoundMethod.Inputs.Pack(big.NewInt(int64(len(data))))
 		if err != nil {
 			return nil, err
 		}
@@ -146,15 +146,15 @@ func CalcOptimismPVGWithEthClient(
 		req := map[string]any{
 			"from": common.HexToAddress("0x"),
 			"to":   gaspriceoracle.PrecompileAddress,
-			"data": hexutil.Encode(append(gaspriceoracle.GetL1FeeMethod.ID, ge...)),
+			"data": hexutil.Encode(append(gaspriceoracle.GetL1FeeUpperBoundMethod.ID, ge...)),
 		}
 		var out any
 		if err := rpc.Call(&out, "eth_call", &req, "latest"); err != nil {
 			return nil, err
 		}
 
 		// Get L1Fee and L2Price
-		l1fee, err := gaspriceoracle.DecodeGetL1FeeMethodOutput(out)
+		l1fee, err := gaspriceoracle.DecodeGetL1FeeUpperBoundOutput(out)
 		if err != nil {
 			return nil, err
 		}

pkg/optimism/gaspriceoracle/methods.go

@@ -10,26 +10,25 @@ import (
 )
 
 var (
-	bytesT, _   = abi.NewType("bytes", "", nil)
 	uint256T, _ = abi.NewType("uint256", "", nil)
 
-	GetL1FeeMethod = abi.NewMethod(
-		"getL1Fee",
-		"getL1Fee",
+	GetL1FeeUpperBoundMethod = abi.NewMethod(
+		"getL1FeeUpperBound",
+		"getL1FeeUpperBound",
 		abi.Function,
 		"",
 		false,
 		false,
 		abi.Arguments{
-			{Name: "data", Type: bytesT},
+			{Name: "data", Type: uint256T},
 		},
 		abi.Arguments{
 			{Name: "fee", Type: uint256T},
 		},
 	)
 )
 
-func DecodeGetL1FeeMethodOutput(out any) (*big.Int, error) {
+func DecodeGetL1FeeUpperBoundOutput(out any) (*big.Int, error) {
 	hex, ok := out.(string)
 	if !ok {
 		return nil, errors.New("getL1Fee: cannot assert type: hex is not of type string")
@@ -39,7 +38,7 @@ func DecodeGetL1FeeMethodOutput(out any) (*big.Int, error) {
 		return nil, fmt.Errorf("getL1Fee: %s", err)
 	}
 
-	args, err := GetL1FeeMethod.Outputs.Unpack(data)
+	args, err := GetL1FeeUpperBoundMethod.Outputs.Unpack(data)
 	if err != nil {
 		return nil, fmt.Errorf("getL1Fee: %s", err)
 	}