No code changes, just catching up with the BOLT changes which rework our
blinded path terminology (for the better!).
Another patch will sweep the rest of our internal names, this tries only to
make things compile and fix up the BOLT quotes.
1. Inside payload: current_blinding_point -> current_path_key
2. Inside update_add_htlc TLV: blinding_point -> blinded_path
3. Inside blinded_path: blinding -> first_path_key
4. Inside onion_message: blinding -> path_key.
5. Inside encrypted_data_tlv: next_blinding_override -> next_path_key_override
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
In particular:
- Bolt 4: add route blinding construction
- Bolt 4: add blinded payments
And this means it's not experimental, so we can turn it on
by default!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Added: Protocol: blinded payments are now supported by default (not just with `--experimental-onion-messages`)
"BOLT 4: Remove legacy format, make var_onion_optin compulsory."
This also renamed the redundant "tlv_payload" to "payload", so we
replace "tlv_tlv_payload" with "tlv_payload" everyhere!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
```
make check-source-bolt CHECK_BOLT_PREFIX="--prefix=BOLT-route-blinding" BOLTVERSION=guilt/offers
```
Other than textual changes, this does:
1. Ensures we put total_amount_msat in onion final hop (reported by @t-bast).
2. Require that they put total_amount_msat in onion final hop.
3. Return `invalid_onion_blinding` exactly as defined by the spec (i.e. less
aggressive when we're the final hop) (also reported by @t-bast, but I already
knew).
See: #5823
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-EXPERIMENTAL: `offers` breaking blinded payments change (total_amount_sat required, Eclair compat)
