Companion

First byte of every encoded admit payload. Application frames must not begin with this byte so the receiver can distinguish protocol from app frames. Value: 0x61 (ASCII 'a' for "admit") — outside the CBOR major-type-7 range that serialization might produce as a bare byte, and unlikely to be the first byte of a legitimate non-CBOR application payload.

Attempt to decode bytes as an AdmitMessage.

Encode an AdmitMessage to bytes with the PREFIX_BYTE framing prefix.

Returns true if bytes looks like an admit frame (starts with PREFIX_BYTE).