diff --git a/protocol/src/protocol_generated.rs b/protocol/src/protocol_generated.rs
index b04ba3337e..00a2896e55 100644
--- a/protocol/src/protocol_generated.rs
+++ b/protocol/src/protocol_generated.rs
@@ -1,6 +1,10 @@
 // automatically generated by the FlatBuffers compiler, do not modify
 
 
+#![allow(dead_code)]
+#![allow(unused_imports)]
+extern crate flatbuffers;
+
 pub mod ckb {
   #![allow(dead_code)]
   #![allow(unused_imports)]
diff --git a/protocol/src/protocol_generated_verifier.rs b/protocol/src/protocol_generated_verifier.rs
index ceb0d5ea37..5ff07b1184 100644
--- a/protocol/src/protocol_generated_verifier.rs
+++ b/protocol/src/protocol_generated_verifier.rs
@@ -52,12 +52,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -65,6 +59,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -136,12 +131,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -149,6 +138,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -271,12 +261,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -284,6 +268,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -356,12 +341,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -369,6 +348,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -450,12 +430,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -463,6 +437,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -534,12 +509,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -547,6 +516,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -583,6 +553,15 @@ pub mod ckb {
                     }
                 }
 
+                if Self::VT_VALID_SINCE as usize + flatbuffers::SIZE_VOFFSET
+                    <= vtab_num_bytes
+                {
+                    let voffset = vtab.get(Self::VT_VALID_SINCE) as usize;
+                    if voffset > 0 && object_inline_num_bytes - voffset < 8 {
+                        return Err(Error::OutOfBounds);
+                    }
+                }
+
                 if Self::VT_ARGS as usize + flatbuffers::SIZE_VOFFSET
                     <= vtab_num_bytes
                 {
@@ -637,12 +616,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -650,6 +623,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -758,12 +732,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -771,6 +739,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -825,12 +794,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -838,6 +801,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -987,12 +951,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1000,6 +958,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1102,12 +1061,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1115,6 +1068,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1195,12 +1149,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1208,6 +1156,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1288,12 +1237,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1301,6 +1244,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1372,12 +1316,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1385,6 +1323,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1474,12 +1413,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1487,6 +1420,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1652,12 +1586,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1665,6 +1593,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1737,12 +1666,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1750,6 +1673,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1828,12 +1752,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1841,6 +1759,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -1929,12 +1848,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -1942,6 +1855,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2014,12 +1928,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2027,6 +1935,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2129,12 +2038,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2142,6 +2045,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2232,12 +2136,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2245,6 +2143,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2334,12 +2233,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2347,6 +2240,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2457,12 +2351,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2470,6 +2358,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2533,12 +2422,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2546,6 +2429,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2615,12 +2499,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2628,6 +2506,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2745,12 +2624,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2758,6 +2631,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)
@@ -2844,12 +2718,6 @@ pub mod ckb {
 
                 let vtab = tab.vtable();
                 let vtab_num_bytes = vtab.num_bytes();
-                let object_inline_num_bytes = vtab.object_inline_num_bytes();
-                if vtab_num_bytes < flatbuffers::SIZE_VOFFSET + flatbuffers::SIZE_VOFFSET
-                    || object_inline_num_bytes < flatbuffers::SIZE_SOFFSET
-                {
-                    return Err(Error::OutOfBounds);
-                }
                 if vtab_loc
                     .checked_add(vtab_num_bytes)
                     .filter(|loc| *loc <= buf_len)
@@ -2857,6 +2725,7 @@ pub mod ckb {
                 {
                     return Err(Error::OutOfBounds);
                 }
+                let object_inline_num_bytes = vtab.object_inline_num_bytes();
                 if tab
                     .loc
                     .checked_add(object_inline_num_bytes)