jsonrpc: Add option_zeroconf handling to listpeers

Author: cdecker

doc/lightning-listpeers.7.md

@@ -46,7 +46,7 @@ On success, an object containing **peers** is returned.  It is an array of objec
   - **state** (string): the channel state, in particular "CHANNELD_NORMAL" means the channel can be used normally (one of "OPENINGD", "CHANNELD_AWAITING_LOCKIN", "CHANNELD_NORMAL", "CHANNELD_SHUTTING_DOWN", "CLOSINGD_SIGEXCHANGE", "CLOSINGD_COMPLETE", "AWAITING_UNILATERAL", "FUNDING_SPEND_SEEN", "ONCHAIN", "DUALOPEND_OPEN_INIT", "DUALOPEND_AWAITING_LOCKIN")
   - **opener** (string): Who initiated the channel (one of "local", "remote")
   - **features** (array of strings):
-    - BOLT #9 features which apply to this channel (one of "option_static_remotekey", "option_anchor_outputs")
+    - BOLT #9 features which apply to this channel (one of "option_static_remotekey", "option_anchor_outputs", "option_zeroconf")
   - **scratch_txid** (txid, optional): The txid we would use if we went onchain now
   - **feerate** (object, optional): Feerates for the current tx:
     - **perkw** (u32): Feerate per 1000 weight (i.e kSipa)
@@ -381,4 +381,4 @@ Main web site: <https://github.com/ElementsProject/lightning> Lightning
 RFC site (BOLT \#9):
 <https://github.com/lightningnetwork/lightning-rfc/blob/master/09-features.md>
 
-[comment]: # ( SHA256STAMP:e6829e8ced923131b95bcfa4f366dd04286fe85485039e9ebc89e79899937df6)
+[comment]: # ( SHA256STAMP:2e8bcc66531b2dce44b94c42852b624bdd9435cc63495fc799458fa5522f0ea9)

doc/schemas/listpeers.schema.json

@@ -327,7 +327,8 @@
                     "type": "string",
                     "enum": [
                       "option_static_remotekey",
-                      "option_anchor_outputs"
+                      "option_anchor_outputs",
+                      "option_zeroconf"
                     ],
                     "description": "BOLT #9 features which apply to this channel"
                   }

lightningd/peer_control.c

@@ -749,6 +749,8 @@ static void json_add_channel(struct lightningd *ld,
 		json_add_string(response, NULL, "option_static_remotekey");
 	if (channel_has(channel, OPT_ANCHOR_OUTPUTS))
 		json_add_string(response, NULL, "option_anchor_outputs");
+	if (channel_has(channel, OPT_ZEROCONF))
+		json_add_string(response, NULL, "option_zeroconf");
 	json_array_end(response);
 
 	if (!amount_sat_sub(&peer_funded_sats, channel->funding_sats,