invoice: decode rgb invoice

Signed-off-by: Vincenzo Palazzo <[email protected]>

Author: vincenzopalazzo

common/bolt11.h

@@ -80,6 +80,11 @@ struct bolt11 {
 	u8 *metadata;
 
 	struct list_head extra_fields;
+
+	// FIXME(vincenzopalazzo): adds rgb information
+	//
+	// 1. `rgb_amt`
+	// 2. `rgb_contract_id`
 };
 
 /* Decodes and checks signature; returns NULL on error; description is

common/bolt11_json.c

@@ -121,4 +121,9 @@ void json_add_bolt11(struct json_stream *response,
 
 	json_add_string(response, "signature",
 			fmt_secp256k1_ecdsa_signature(tmpctx, &b11->sig));
+
+	// FIXME(vincenzopalazzo): adding tag RGB information
+	//
+	// 1. Adds `rgb_amt`
+	// 2. Adds `rgb_contract_id`
 }

plugins/offers.c

@@ -1194,6 +1194,9 @@ static struct command_result *json_decode(struct command *cmd,
 
 	response = jsonrpc_stream_success(cmd);
 	json_add_string(response, "type", decodable->type);
+	// FIXME(vincenzopalazzo): To decode an RGB invoice we should
+	// make sure that the RGB is only supported in the bolt11,
+	// otherwise throws an error.
 	if (decodable->offer)
 		json_add_offer(response, decodable->offer);
 	if (decodable->invreq)