@spec deliver(Wardrik.Scope.t(), map()) :: {:ok, map()} | {:error, Wardrik.Error.t()}

Passes a chat app's request to the channel it names. Returns the channel's response.

@spec fetch(atom(), String.t()) :: {:ok, {module(), keyword()}} | :error

Returns the channel name as {module, opts}, or :error if there's none.

opts are what the channel's callbacks take. See options/3.

@spec options(Wardrik.t(), String.t(), keyword()) :: keyword()

Returns the options a channel's callbacks take.

They're the channel's own options, with each {:secret, name} replaced by the deployment's secret, plus:

• :server - Wardrik, which runs its operations.
• :wardrik - the instance's name.
• :events - the event log.
• :vault - the vault, or nil without :keys.
• :channel - the channel's name.
• :store - the store.