Spec: Update to latest BOLT, include our first global feature definition.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Makefile

@@ -15,7 +15,7 @@ CCANDIR := ccan
 
 # Where we keep the BOLT RFCs
 BOLTDIR := ../lightning-rfc/
-BOLTVERSION := 8b2cf0054660bece9e1004f42a500c6a1a77efd3
+BOLTVERSION := 8555709811e6b2326f80dc479021b161e850bf03
 
 -include config.vars
 

channeld/channeld.c

@@ -2231,6 +2231,11 @@ static void peer_reconnect(struct peer *peer,
 	 *   - MUST set `next_revocation_number` to the commitment number
 	 *     of the next `revoke_and_ack` message it expects to receive.
 	 *   - if it supports `option_data_loss_protect`:
+	 *       - MUST set `my_current_per_commitment_point` to its commitment
+	 *         point for the last signed commitment it received from its
+	 *         channel peer (i.e. the commitment_point corresponding to the
+	 *         commitment transaction the sender would use to unilaterally
+	 *         close).
 	 *     - if `next_revocation_number` equals 0:
 	 *       - MUST set `your_last_per_commitment_secret` to all zeroes
 	 *     - otherwise:

common/features.h

@@ -36,4 +36,13 @@ bool global_feature_negotiated(const u8 *gfeatures, size_t f);
 #define LOCAL_UPFRONT_SHUTDOWN_SCRIPT		4
 #define LOCAL_GOSSIP_QUERIES			6
 
+/* BOLT #9:
+ *
+ * ## Assigned `globalfeatures` flags
+ *...
+ * | Bits | Name              | ...
+ * | 8/9  | `var_onion_optin` | ...
+ */
+#define GLOBAL_VAR_ONION			8
+
 #endif /* LIGHTNING_COMMON_FEATURES_H */

lightningd/channel_control.c

@@ -344,6 +344,7 @@ void peer_start_channeld(struct channel *channel,
 	/* BOLT #2:
 	 *
  	 *   - if it supports `option_data_loss_protect`:
+	 *...
 	 *     - if `next_revocation_number` equals 0:
 	 *       - MUST set `your_last_per_commitment_secret` to all zeroes
 	 *     - otherwise:

lightningd/closing_control.c

@@ -247,6 +247,7 @@ void peer_start_closingd(struct channel *channel,
 	/* BOLT #2:
 	 *
 	 *   - if it supports `option_data_loss_protect`:
+	 *...
 	 *     - if `next_revocation_number` equals 0:
 	 *       - MUST set `your_last_per_commitment_secret` to all zeroes
 	 *     - otherwise:

lightningd/peer_htlcs.c

@@ -309,7 +309,7 @@ static void handle_localpay(struct htlc_in *hin,
 	 *
 	 *   - if the `cltv_expiry` value is unreasonably near the present:
 	 *     - MUST fail the HTLC.
-	 *     - MUST return a `final_expiry_too_soon` error.
+	 *     - MUST return an `incorrect_or_unknown_payment_details` error.
 	 */
 	if (get_block_height(ld->topology) + ld->config.cltv_final
 	    > cltv_expiry) {
@@ -318,6 +318,7 @@ static void handle_localpay(struct htlc_in *hin,
 			  cltv_expiry,
 			  get_block_height(ld->topology),
 			  ld->config.cltv_final);
+		/* FIXME! */
 		failcode = WIRE_FINAL_EXPIRY_TOO_SOON;
 		goto fail;
 	}