Update decode method to match encode method

restricted/types/transaction.go

@@ -36,6 +36,7 @@ var (
 	ErrInvalidTxType        = errors.New("transaction type not valid in this context")
 	ErrTxTypeNotSupported   = errors.New("transaction type not supported")
 	ErrGasFeeCapTooLow      = errors.New("fee cap less than base fee")
+	errShortTypedTx         = errors.New("typed transaction too short")
 	errEmptyTypedTx         = errors.New("empty typed transaction bytes")
 )
 
@@ -103,6 +104,7 @@ type TxData interface {
 	effectiveGasPrice(dst *big.Int, baseFee *big.Int) *big.Int
 
 	encode(b *bytes.Buffer) error
+	decode([]byte) error
 }
 
 // EncodeRLP implements rlp.Encoder
@@ -195,26 +197,24 @@ func (tx *Transaction) UnmarshalBinary(b []byte) error {
 // decodeTyped decodes a typed transaction from the canonical format.
 func (tx *Transaction) decodeTyped(b []byte) (TxData, error) {
 	if len(b) <= 1 {
-		return nil, errEmptyTypedTx
+		return nil, errShortTypedTx
 	}
+	var inner TxData
 	switch b[0] {
 	case AccessListTxType:
-		var inner AccessListTx
-		err := rlp.DecodeBytes(b[1:], &inner)
-		return &inner, err
+		inner = new(AccessListTx)
 	case DynamicFeeTxType:
-		var inner DynamicFeeTx
-		err := rlp.DecodeBytes(b[1:], &inner)
-		return &inner, err
+		inner = new(DynamicFeeTx)
 	case BlobTxType:
-		var inner BlobTx
-		err := rlp.DecodeBytes(b[1:], &inner)
-		return &inner, err
+		inner = new(BlobTx)
 	default:
 		return nil, ErrTxTypeNotSupported
 	}
+	err := inner.decode(b[1:])
+	return inner, err
 }
 
+
 // setDecoded sets the inner transaction and size after decoding.
 func (tx *Transaction) setDecoded(inner TxData, size uint64) {
 	tx.inner = inner

restricted/types/transaction_test.go

@@ -82,7 +82,7 @@ func TestDecodeEmptyTypedTx(t *testing.T) {
 	input := []byte{0x80}
 	var tx Transaction
 	err := rlp.DecodeBytes(input, &tx)
-	if err != errEmptyTypedTx {
+	if err != errShortTypedTx {
 		t.Fatal("wrong error:", err)
 	}
 }