offers: make them always unsigned.

This is in preparation for the spec update where the signature field
does not even exist.

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

doc/lightning-disableoffer.7.md

@@ -41,7 +41,6 @@ On success, an object is returned, containing:
 - **active** (boolean): Whether the offer can produce invoices/payments (always *false*)
 - **single\_use** (boolean): Whether the offer is disabled after first successful use
 - **bolt12** (string): The bolt12 string representing this offer
-- **bolt12\_unsigned** (string): The bolt12 string representing this offer, without signature
 - **used** (boolean): Whether the offer has had an invoice paid / payment made
 - **label** (string, optional): The label provided when offer was created
 
@@ -75,4 +74,4 @@ RESOURCES
 ---------
 
 Main web site: <https://github.com/ElementsProject/lightning>
-[comment]: # ( SHA256STAMP:27200ba49d493cbbb1ea84736ccfaeb05a92c69dab34f48cd3d5bbf46ffc2d64)
+[comment]: # ( SHA256STAMP:b471374a7c160373b328c2171953225b7fa27d26314a270e95320c1b6ef57307)

doc/lightning-listoffers.7.md

@@ -36,7 +36,6 @@ On success, an object containing **offers** is returned.  It is an array of obje
 - **active** (boolean): whether this can still be used
 - **single\_use** (boolean): whether this expires as soon as it's paid
 - **bolt12** (string): the bolt12 encoding of the offer
-- **bolt12\_unsigned** (string): the bolt12 encoding of the offer, without signature
 - **used** (boolean): True if an associated invoice has been paid
 - **label** (string, optional): the (optional) user-specified label
 
@@ -81,4 +80,4 @@ RESOURCES
 ---------
 
 Main web site: <https://github.com/ElementsProject/lightning>
-[comment]: # ( SHA256STAMP:ac5b79c1f9b76add7eb08b9940180f2200049509df627cccc1dc892efa488778)
+[comment]: # ( SHA256STAMP:985a6bae4b0a1702cd02998859c8072eee44b219c15294af4f4078465531c8c9)

doc/lightning-offer.7.md

@@ -101,7 +101,6 @@ On success, an object is returned, containing:
 - **active** (boolean): whether this can still be used (always *true*)
 - **single\_use** (boolean): whether this expires as soon as it's paid (reflects the *single_use* parameter)
 - **bolt12** (string): the bolt12 encoding of the offer
-- **bolt12\_unsigned** (string): the bolt12 encoding of the offer, without a signature
 - **used** (boolean): True if an associated invoice has been paid
 - **created** (boolean): false if the offer already existed
 - **label** (string, optional): the (optional) user-specified label
@@ -135,4 +134,4 @@ RESOURCES
 
 Main web site: <https://github.com/ElementsProject/lightning>
 
-[comment]: # ( SHA256STAMP:aa7544c07d3d84963e43500a367ceb62ebab8f5ae26de1dd39bb087f928dcaee)
+[comment]: # ( SHA256STAMP:217af2aae777229992e2ee07c6f8040d4ca5b75ee2064590584de13162974fe2)

doc/lightning-offerout.7.md

@@ -60,7 +60,6 @@ On success, an object is returned, containing:
 - **active** (boolean): whether this will pay a matching incoming invoice (always *true*)
 - **single\_use** (boolean): whether this expires as soon as it's paid out (always *true*)
 - **bolt12** (string): the bolt12 encoding of the offer
-- **bolt12\_unsigned** (string): the bolt12 encoding of the offer, without a signature
 - **used** (boolean): True if an incoming invoice has been paid (always *false*)
 - **created** (boolean): false if the offer already existed
 - **label** (string, optional): the (optional) user-specified label
@@ -100,4 +99,4 @@ RESOURCES
 
 Main web site: <https://github.com/ElementsProject/lightning>
 
-[comment]: # ( SHA256STAMP:7c0f75ca64bdcce2467f42d7671caccf5f7bf6eb97fb3edef1e39f2fdb87b4d8)
+[comment]: # ( SHA256STAMP:903e40a51c806613da956ce1b4021e9aac964c11d0d0c2714aeb68a12f083265)

doc/schemas/disableoffer.schema.json

@@ -6,7 +6,6 @@
     "active",
     "single_use",
     "bolt12",
-    "bolt12_unsigned",
     "used"
   ],
   "additionalProperties": false,
@@ -32,10 +31,6 @@
       "type": "string",
       "description": "The bolt12 string representing this offer"
     },
-    "bolt12_unsigned": {
-      "type": "string",
-      "description": "The bolt12 string representing this offer, without signature"
-    },
     "used": {
       "type": "boolean",
       "description": "Whether the offer has had an invoice paid / payment made"

doc/schemas/listoffers.schema.json

@@ -16,7 +16,6 @@
           "active",
           "single_use",
           "bolt12",
-          "bolt12_unsigned",
           "used"
         ],
         "properties": {
@@ -38,10 +37,6 @@
             "type": "string",
             "description": "the bolt12 encoding of the offer"
           },
-          "bolt12_unsigned": {
-            "type": "string",
-            "description": "the bolt12 encoding of the offer, without signature"
-          },
           "used": {
             "type": "boolean",
             "description": "True if an associated invoice has been paid"

doc/schemas/offer.schema.json

@@ -7,7 +7,6 @@
     "active",
     "single_use",
     "bolt12",
-    "bolt12_unsigned",
     "used",
     "created"
   ],
@@ -33,10 +32,6 @@
       "type": "string",
       "description": "the bolt12 encoding of the offer"
     },
-    "bolt12_unsigned": {
-      "type": "string",
-      "description": "the bolt12 encoding of the offer, without a signature"
-    },
     "used": {
       "type": "boolean",
       "description": "True if an associated invoice has been paid"

doc/schemas/offerout.schema.json

@@ -7,7 +7,6 @@
     "active",
     "single_use",
     "bolt12",
-    "bolt12_unsigned",
     "used",
     "created"
   ],
@@ -36,10 +35,6 @@
       "type": "string",
       "description": "the bolt12 encoding of the offer"
     },
-    "bolt12_unsigned": {
-      "type": "string",
-      "description": "the bolt12 encoding of the offer, without a signature"
-    },
     "used": {
       "type": "boolean",
       "enum": [

lightningd/offer.c

@@ -19,16 +19,13 @@
 static void json_populate_offer(struct json_stream *response,
 				const struct sha256 *offer_id,
 				const char *b12,
-				const char *b12_nosig,
 				const struct json_escape *label,
 				enum offer_status status)
 {
 	json_add_sha256(response, "offer_id", offer_id);
 	json_add_bool(response, "active", offer_status_active(status));
 	json_add_bool(response, "single_use", offer_status_single(status));
 	json_add_string(response, "bolt12", b12);
-	if (b12_nosig)
-		json_add_string(response, "bolt12_unsigned", b12_nosig);
 	json_add_bool(response, "used", offer_status_used(status));
 	if (label)
 		json_add_escaped_string(response, "label", label);
@@ -90,10 +87,9 @@ static struct command_result *json_createoffer(struct command *cmd,
 	struct json_escape *label;
 	struct tlv_offer *offer;
 	struct sha256 merkle;
-	const char *b12str, *b12str_nosig;
+	const char *b12str;
 	bool *single_use;
 	enum offer_status status;
-	struct pubkey key;
 	bool created;
 
 	if (!param(cmd, buffer, params,
@@ -108,11 +104,7 @@ static struct command_result *json_createoffer(struct command *cmd,
 	else
 		status = OFFER_MULTIPLE_USE_UNUSED;
  	merkle_tlv(offer->fields, &merkle);
-	offer->signature = tal(offer, struct bip340sig);
-	if (!pubkey_from_node_id(&key, &cmd->ld->id))
-		fatal("invalid own node_id?");
-	hsm_sign_b12(cmd->ld, "offer", "signature", &merkle, NULL, &key,
-		     offer->signature);
+	offer->signature = NULL;
 	b12str = offer_encode(cmd, offer);
 
 	/* If it already exists, we use that one instead (and then
@@ -131,10 +123,9 @@ static struct command_result *json_createoffer(struct command *cmd,
 		created = true;
 
 	offer->signature = tal_free(offer->signature);
-	b12str_nosig = offer_encode(cmd, offer);
 
 	response = json_stream_success(cmd);
-	json_populate_offer(response, &merkle, b12str, b12str_nosig, label, status);
+	json_populate_offer(response, &merkle, b12str, label, status);
 	json_add_bool(response, "created", created);
 	return command_success(cmd, response);
 }
@@ -147,25 +138,6 @@ static const struct json_command createoffer_command = {
 };
 AUTODATA(json_command, &createoffer_command);
 
-/* We store strings in the db, so removing signatures is easiest by conversion */
-static const char *offer_str_nosig(const tal_t *ctx,
-				   struct lightningd *ld,
-				   const char *b12str)
-{
-	char *fail;
-	struct tlv_offer *offer = offer_decode(tmpctx, b12str, strlen(b12str),
-					       ld->our_features, chainparams,
-					       &fail);
-
-	if (!offer) {
-		log_broken(ld->log, "Cannot reparse offerstr from db %s: %s",
-			   b12str, fail);
-		return NULL;
-	}
-	offer->signature = tal_free(offer->signature);
-	return offer_encode(ctx, offer);
-}
-
 static struct command_result *json_listoffers(struct command *cmd,
 					       const char *buffer,
 					       const jsmntok_t *obj UNNEEDED,
@@ -194,7 +166,6 @@ static struct command_result *json_listoffers(struct command *cmd,
 			json_object_start(response, NULL);
 			json_populate_offer(response,
 					    offer_id, b12,
-					    offer_str_nosig(tmpctx, cmd->ld, b12),
 					    label, status);
 			json_object_end(response);
 		}
@@ -211,8 +182,6 @@ static struct command_result *json_listoffers(struct command *cmd,
 				json_object_start(response, NULL);
 				json_populate_offer(response,
 						    &id, b12,
-						    offer_str_nosig(tmpctx,
-								    cmd->ld, b12),
 						    label, status);
 				json_object_end(response);
 			}
@@ -258,10 +227,7 @@ static struct command_result *json_disableoffer(struct command *cmd,
 	status = wallet_offer_disable(wallet, offer_id, status);
 
 	response = json_stream_success(cmd);
-	json_populate_offer(response, offer_id, b12,
-			    offer_str_nosig(tmpctx,
-					    cmd->ld, b12),
-			    label, status);
+	json_populate_offer(response, offer_id, b12, label, status);
 	return command_success(cmd, response);
 }
 

tests/test_pay.py

@@ -4405,7 +4405,6 @@ def test_offer(node_factory, bitcoind):
         offer = only_one(l1.rpc.call('listoffers', [ret['offer_id']])['offers'])
 
         assert offer['bolt12'] == ret['bolt12']
-        assert offer['bolt12_unsigned'] == ret['bolt12_unsigned']
         assert offer['offer_id'] == ret['offer_id']
 
         output = subprocess.check_output([bolt12tool, 'decode',
@@ -4414,12 +4413,6 @@ def test_offer(node_factory, bitcoind):
             assert 'amount' not in output
         else:
             assert 'amount' in output
-        output = subprocess.check_output([bolt12tool, 'decode',
-                                          offer['bolt12_unsigned']]).decode('ASCII')
-        if amount == 'any':
-            assert 'amount' not in output
-        else:
-            assert 'amount' in output
 
     # Try wrong amount precision:
     with pytest.raises(RpcError, match='Currency AUD requires 2 minor units'):
@@ -4608,7 +4601,7 @@ def test_fetchinvoice(node_factory, bitcoind):
     assert offer1['created'] is True
 
     inv1 = l1.rpc.call('fetchinvoice', {'offer': offer1['bolt12']})
-    inv2 = l1.rpc.call('fetchinvoice', {'offer': offer1['bolt12_unsigned'],
+    inv2 = l1.rpc.call('fetchinvoice', {'offer': offer1['bolt12'],
                                         'payer_note': 'Thanks for the fish!'})
     assert inv1 != inv2
     assert 'next_period' not in inv1
@@ -4908,7 +4901,7 @@ def test_sendinvoice(node_factory, bitcoind):
     assert only_one(l1.rpc.call('listoffers', [offer['offer_id']])['offers'])['used'] is False
 
     # sendinvoice should work.
-    out = l2.rpc.call('sendinvoice', {'offer': offer['bolt12_unsigned'],
+    out = l2.rpc.call('sendinvoice', {'offer': offer['bolt12'],
                                       'label': 'test sendinvoice 1'})
     assert out['label'] == 'test sendinvoice 1'
     assert out['description'] == 'simple test'