ActorMethodParameters

ActorMethodParameters<T> = T extends ActorMethod<infer Args, any> ? Args : T extends (…args) => Promise<any> ? Args : never

Defined in: types/reactor.ts:49

Extract the argument tuple of a service method.

ActorMethod carries a withOptions member as well as a call signature, so a service written with plain function types — claim: (id: Uint8Array) => Promise<Result> instead of ActorMethod<[Uint8Array], Result> — does not match it. That used to fall through to never, which compiles at the declaration site and then fails at every hook call site with “Type ‘Uint8Array[]’ is not assignable to type ‘undefined’”. didc/dfx output always uses ActorMethod, so only hand-written or third-party service types hit it, and the error never pointed at the cause.

The plain-function fallback below makes both shapes infer identically.

Type Parameters

T

T