Update to lightning-rfc to dc0b529161561c6be3ff53c5f8574b23c3305a04

Only minor changes, but I add some more spec text to
lightningd/test/run-commit_tx.c to be sure to catch if it changes
again.

One reference isn't upstream yet, so had to be commented out.

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

lightningd/channel.c

@@ -330,9 +330,9 @@ enum channel_add_err channel_add_htlc(struct channel *channel,
 
 	/* BOLT #2:
 	 *
-	 * A receiving node SHOULD fail the channel if a sending node
-	 * adds more than `max-htlc-value-in-flight-msat` in HTLCs to
-	 * its local commitment transaction. */
+	 * A receiving node SHOULD fail the channel if a sending node ... or
+	 * adds more than its `max-htlc-value-in-flight-msat` worth of offered
+	 * HTLCs to its local commitment transaction. */
 	if (msat_in_htlcs > max_htlc_value_in_flight_msat(channel, recipient)) {
 		e = CHANNEL_ERR_MAX_HTLC_VALUE_EXCEEDED;
 		goto out;

lightningd/opening/opening.c

@@ -522,7 +522,7 @@ static u8 *recv_channel(struct state *state, const struct points *ours,
 			      "Parsing open_channel %s",
 			      tal_hex(peer_msg, peer_msg));
 
-	/* BOLT #2:
+	/* BOLT #2 FIXME:
 	 *
 	 * The receiving node ... MUST fail the channel if `funding-satoshis`
 	 * is greater than or equal to 2^24 */
@@ -534,7 +534,7 @@ static u8 *recv_channel(struct state *state, const struct points *ours,
 	/* BOLT #2:
 	 *
 	 * The receiving node ... MUST fail the channel if `push-msat` is
-	 * greater than `funding-satoshis` * 1000.
+	 * greater than `funding-amount` * 1000.
 	 */
 	if (state->push_msat > state->funding_satoshis * 1000)
 		peer_failed(PEER_FD, &state->cs, NULL, WIRE_OPENING_PEER_BAD_FUNDING,
@@ -542,7 +542,7 @@ static u8 *recv_channel(struct state *state, const struct points *ours,
 			      " too large for funding_satoshis %"PRIu64,
 			      state->push_msat, state->funding_satoshis);
 
-	/* BOLT #3:
+	/* BOLT #2:
 	 *
 	 * The receiver MUST fail the channel if it considers `feerate-per-kw`
 	 * too small for timely processing, or unreasonably large.

lightningd/peer_control.c

@@ -627,7 +627,7 @@ static void channel_config(struct lightningd *ld,
 	ours->dust_limit_satoshis = 546;
 	ours->max_htlc_value_in_flight_msat = UINT64_MAX;
 
-	/* BOLT #3:
+	/* BOLT #2:
 	 *
 	 * The sender SHOULD set `minimum-depth` to an amount where
 	 * the sender considers reorganizations to be low risk.
@@ -637,7 +637,7 @@ static void channel_config(struct lightningd *ld,
 	/* Don't care */
 	ours->htlc_minimum_msat = 0;
 
-	/* BOLT #3:
+	/* BOLT #2:
 	 *
 	 * The sender SHOULD set `to-self-delay` sufficient to ensure
 	 * the sender can irreversibly spend a commitment transaction

lightningd/test/run-channel.c

@@ -40,25 +40,25 @@ static struct sha256_double txid_from_hex(const char *hex)
  *
  *     local_feerate_per_kw: 0
  *     ...
- *     local_feerate_per_kw: 678
+ *     local_feerate_per_kw: 676
  *     ...
- *     local_feerate_per_kw: 679
+ *     local_feerate_per_kw: 677
  *     ...
- *     local_feerate_per_kw: 2168
+ *     local_feerate_per_kw: 2161
  *     ...
- *     local_feerate_per_kw: 2169
+ *     local_feerate_per_kw: 2162
  *     ...
- *     local_feerate_per_kw: 2294
+ *     local_feerate_per_kw: 2291
  *     ...
- *     local_feerate_per_kw: 2295
+ *     local_feerate_per_kw: 2292
  *     ...
- *     local_feerate_per_kw: 3872
+ *     local_feerate_per_kw: 3866
  *     ...
- *     local_feerate_per_kw: 3873
+ *     local_feerate_per_kw: 3867
  *     ...
- *     local_feerate_per_kw: 5149
+ *     local_feerate_per_kw: 5133
  *     ...
- *     local_feerate_per_kw: 5150
+ *     local_feerate_per_kw: 5134
  *     ...
  *     local_feerate_per_kw: 9651180
  *     ...
@@ -68,16 +68,16 @@ static struct sha256_double txid_from_hex(const char *hex)
  */
 static u64 feerates[] = {
 	0,
-	678,
-	679,
-	2168,
-	2169,
-	2294,
-	2295,
-	3872,
-	3873,
-	5149,
-	5150,
+	676,
+	677,
+	2161,
+	2162,
+	2291,
+	2292,
+	3866,
+	3867,
+	5133,
+	5134,
 	9651180,
 	9651181,
 	9651936

lightningd/test/run-commit_tx.c

@@ -358,6 +358,22 @@ static u64 increase(u64 feerate_per_kw)
 #else
 static u64 increase(u64 feerate_per_kw)
 {
+	/* BOLT #3:
+	 *
+	 *     local_feerate_per_kw: 0
+	 *     ...
+	 *     local_feerate_per_kw: 677
+	 *     ...
+	 *     local_feerate_per_kw: 2162
+	 *     ...
+	 *     local_feerate_per_kw: 2292
+	 *     ...
+	 *     local_feerate_per_kw: 3867
+	 *     ...
+	 *     local_feerate_per_kw: 5134
+	 *     ...
+	 *     local_feerate_per_kw: 9651181
+	 */
 	const u64 rates[] = { 0, 677, 2162, 2292, 3867, 5134, 9651181 };
 	size_t i;
 
@@ -876,6 +892,15 @@ int main(void)
 			continue;
 		}
 
+		/* BOLT #3:
+		 *
+		 *    name: commitment tx with fee greater than funder amount
+		 *    to_local_msat: 6988000000
+		 *    to_remote_msat: 3000000000
+		 *    local_feerate_per_kw: 9651936
+		 */
+		assert(feerate_per_kw == 9651936);
+
 		printf("\n"
 		       "name: commitment tx with fee greater than funder amount\n"
 		       "to_local_msat: %"PRIu64"\n"