🔢 Op Code
Compute a message op code from its TL-B constructor, the way TON contracts derive them.
How it works
The scheme is normalized: an explicit tag (#… or $…) and brackets are removed, a trailing ; is dropped and whitespace is collapsed. The op code is the CRC32 of that text with the highest bit cleared.
Some standard ops use the same CRC32 with the highest bit set instead, often responses such as excesses (0xd53276db). Both forms are shown.
Common op codes
Click a row to load its scheme. The last column shows that the value is reproduced from the scheme.
| Op | Message |
|---|