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findProtocolVersion

function findProtocolVersion(data): Promise<string | null>;

Defined in: src/wire/public.ts:130

Return the application protocol_version stamped on a request body.

The twin of findStateToken. An intermediary that rewrites a request must recover and re-stamp this (see writeRequest) so the backend’s dispatch-boundary version check still sees the originating client’s version. Returns null when absent or unparseable — a request that never carried one is structurally exempt from the check.

Parameter Type
data Uint8Array

Promise<string | null>