decodeAs

Decode this packet's decoded.payload using the supplied Wire adapter.

Returns null when:

• decoded is null (payload was never set, or the packet is encrypted only),

• decoded.payload is empty, or

• the wire bytes fail to parse against adapter (any Throwable is swallowed and surfaced as null so callers can branch without a try/catch).

No portnum check — callers asserting a payload type are responsible for verifying decoded.portnum first if mismatch matters. The typed accessors in PayloadAccessors.kt (e.g. asPosition, asWaypoint) bake in the matching portnum guard; this generic form is the escape hatch for portnums without a typed accessor (Paxcount, StoreAndForward, …).

Why not reified? Wire's Kotlin runtime exposes one ADAPTER per generated message class, but does not expose a generic way to recover that adapter from a reified type parameter at the common-Kotlin level (no kotlin.reflect for proto types in commonMain, and Message.Companion.ADAPTER is per-class, not on a shared base companion). Passing the adapter explicitly is therefore the portable form; convenience overloads below cover the common payload types.

Example:

val pos = packet.decodeAs(Position.ADAPTER)