We had a scheme where lightningd itself would put a per-node secret in
the blinded path, then we'd tell the caller when it was used. Then it
simply checks the alias to determine if the correct path was used.
But this doesn't work when we start to offer multiple blinded paths.
So go for a far simpler scheme, where the secret is generated (and
stored) by the caller, and hand it back to them.
We keep the split "with secret" or "without secret" API, since I'm
sure callers who don't care about the secret won't check that it
doesn't exist! And without that, someone can use a blinded path for a
different message and get a response which may reveal the node.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Instead of open coding in connectd/onion_message, we move it to common
with a nice API.
This lets us process the BOLT test vectors.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Mainly, field name changes.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-EXPERIMENTAL: Protocol: Support for forwarding blinded payments (as per latest draft)
I removed these prematurely: we *haven't* had a release since
introducing them!
This consists of reverting d15d629b8b
"plugins/fetchinvoice: remove obsolete string-based API." and
plugins/fetchinvoice: remove obsolete string-based
API. "onion_messages: remove obs2 support."
Some minor changes due to updated fromwire_tlv API since they
were removed, but not much.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-EXPERIMENTAL: REVERT: Removed backwards compat with onion messages from v0.10.1.
Requiring the caller to allocate them is ugly, and differs from
other types.
This means we need a context arg if we don't have one already.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
No more "towire_offer", but "towire_tlv_offer".
This means we double-up on the unfortunately-named `tlv_payload` inside
the onion, but we should rename that in the spec when we remove
old payloads.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We don't need to log msgs from subds, but we do our own, and we weren't.
1. Rename queue_peer_msg to inject_peer_msg for clarity, make it do logging
2. In the one place where we're relaying, call msg_queue() directly.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell