transaction: set feePerByte on tx construction

pkg/core/transaction/transaction.go

@@ -275,6 +275,7 @@ func NewTransactionFromBytes(network netmode.Magic, b []byte) (*Transaction, err
 	if r.Err != nil {
 		return nil, r.Err
 	}
+	tx.feePerByte = tx.NetworkFee / int64(len(b))
 	return tx, nil
 }
 

pkg/rpc/client/rpc_test.go

@@ -498,7 +498,12 @@ var rpcClientTestCases = map[string][]rpcClientTestCase{
 				if err != nil {
 					panic(err)
 				}
-				return c.GetRawTransactionVerbose(hash)
+				out, err := c.GetRawTransactionVerbose(hash)
+				if err != nil {
+					return nil, err
+				}
+				out.Transaction.FeePerByte() // set fee per byte
+				return out, nil
 			},
 			serverResponse: txMoveNeoVerbose,
 			result: func(c *Client) interface{} {