We therefore keep a reference to the DB and will wrap and unwrap when
a hook returns.
Notice that this might cause behavior changes when moving logic into a
hook callback, since the continuation runs in a different transaction
than the event that triggered the hook in the first place. Should not
matter too much, since we don't use DB rollbacks at the moment, but
it's something to keep in mind.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
This ties all the things together, using the serializer to transform
the payload into a valid `jsonrpc_request`, sending it to the plugin,
and then using the deserializer on the way back before calling the
hook callback with the appropriate information.
Notice that the serializer and deserializer is skipped if we don't
have a plugin that registered for this hook.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
This is the first use of the `hooks` autodata field, and it required a
dummy element in order for the section not to be dropped, it'll be
removed once we have actual hooks.
I might have gone a bit overboard with the type-checking, but
typesafe_cb_cast is quite nice to use, so why not. The macro to
register a new hook encapsulates the entire flow from param
serialization, to dispatch, parsing and callback dispatch in one
bundle. I was tempted to have the callback outside of the
registration, but it's unlikely that we'll have two calls to the same
hook with different callbacks.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Rusty Russell
Christian Decker