# Protocol Envelope

The protocol envelope embedded in the Taproot script is as follows:

```
OP_FALSE
OP_IF
  <protocol identifier>
  <payload tag>
  <payload>
OP_ENDIF
```

| Field               | Description              | Memo                                                          |
| ------------------- | ------------------------ | ------------------------------------------------------------- |
| protocol identifier | The protocol identifier  | Fixed protocol value: ***sbt***                               |
| payload tag         | The payload tag          | Fixed protocol value: ***OP\_0***                             |
| payload             | The JSON-encoded payload | Operation payload such as ***issue, mint, reveal and prove*** |


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