wallet_invoice_nextpaid: return a struct invoice.

This reuses the same code internally, and also now means that we deal
correctly with "any" msatoshi invoices: the old code would a return
'msatoshi' of 0 in that case.

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

lightningd/invoice.c

@@ -411,12 +411,8 @@ static void json_waitanyinvoice(struct command *cmd,
 	u64 pay_index;
 	struct invoice_waiter *w;
 	struct invoices *invs = cmd->ld->invoices;
-	bool res;
 	struct wallet *wallet = cmd->ld->wallet;
-	char* outlabel;
-	struct sha256 outrhash;
-	u64 outmsatoshi;
-	u64 outpay_index;
+	struct invoice *inv;
 	struct json_result *response;
 
 	if (!json_get_params(buffer, params,
@@ -438,25 +434,24 @@ static void json_waitanyinvoice(struct command *cmd,
 	}
 
 	/* Find next paid invoice. */
-	res = wallet_invoice_nextpaid(cmd, wallet, pay_index,
-				      &outlabel, &outrhash,
-				      &outmsatoshi, &outpay_index);
+	inv = wallet_invoice_nextpaid(cmd, wallet, pay_index);
 
 	/* If we found one, return it. */
-	if (res) {
+	if (inv) {
 		response = new_json_result(cmd);
 
 		json_object_start(response, NULL);
-		json_add_string(response, "label", outlabel);
-		json_add_hex(response, "rhash", &outrhash, sizeof(outrhash));
-		json_add_u64(response, "msatoshi", outmsatoshi);
+		json_add_string(response, "label", inv->label);
+		json_add_hex(response, "rhash", &inv->rhash, sizeof(inv->rhash));
+		if (inv->msatoshi)
+			json_add_u64(response, "msatoshi", *inv->msatoshi);
 		json_add_bool(response, "complete", true);
-		json_add_u64(response, "pay_index", outpay_index);
+		json_add_u64(response, "pay_index", inv->pay_index);
 		json_object_end(response);
 
 		command_success(cmd, response);
 
-		/* outlabel is freed when cmd is freed, and command_success
+		/* inv is freed when cmd is freed, and command_success
 		 * also frees cmd. */
 		return;
 	}

wallet/wallet.c

@@ -1174,20 +1174,18 @@ static void wallet_stmt2invoice(sqlite3_stmt *stmt, struct invoice *inv)
 	list_head_init(&inv->waitone_waiters);
 }
 
-bool wallet_invoice_nextpaid(const tal_t *cxt,
-			     const struct wallet *wallet,
-			     u64 pay_index,
-			     char **outlabel,
-			     struct sha256 *outrhash,
-			     u64 *outmsatoshi,
-			     u64 *outpay_index)
+struct invoice *wallet_invoice_nextpaid(const tal_t *ctx,
+					const struct wallet *wallet,
+					u64 pay_index)
 {
 	sqlite3_stmt *stmt;
 	int res;
+	struct invoice *inv = tal(ctx, struct invoice);
 
 	/* Generate query. */
 	stmt = db_prepare(wallet->db,
-			"SELECT label, payment_hash, msatoshi, pay_index"
+			"SELECT id, state, payment_key, payment_hash,"
+			" label, msatoshi, expiry_time, pay_index "
 			"  FROM invoices"
 			" WHERE pay_index NOT NULL"
 			"   AND pay_index > ?"
@@ -1198,20 +1196,12 @@ bool wallet_invoice_nextpaid(const tal_t *cxt,
 	if (res != SQLITE_ROW) {
 		/* No paid invoice found. */
 		sqlite3_finalize(stmt);
-		return false;
+		return tal_free(inv);
 	} else {
-		/* Paid invoice found, return data. */
-		*outlabel = tal_strndup(cxt, sqlite3_column_blob(stmt, 0), sqlite3_column_bytes(stmt, 0));
-
-		assert(sqlite3_column_bytes(stmt, 1) == sizeof(struct sha256));
-		memcpy(outrhash, sqlite3_column_blob(stmt, 1), sqlite3_column_bytes(stmt, 1));
-
-		*outmsatoshi = sqlite3_column_int64(stmt, 2);
-
-		*outpay_index = sqlite3_column_int64(stmt, 3);
+		wallet_stmt2invoice(stmt, inv);
 
 		sqlite3_finalize(stmt);
-		return true;
+		return inv;
 	}
 }
 

wallet/wallet.h

@@ -346,9 +346,8 @@ bool wallet_htlcs_reconnect(struct wallet *wallet,
 /**
  * wallet_invoice_nextpaid -- Find a paid invoice.
  *
- * Get the details (label, rhash, msatoshi, pay_index) of the first paid
- * invoice greater than the given pay_index. Return false if no paid
- * invoice found, return true if found. The first ever paid invoice will
+ * Get the first paid invoice greater than the given pay_index. Return NULL
+ * if no paid invoice found. The first ever paid invoice will
  * have a pay_index of 1 or greater, so giving a pay_index of 0 will get
  * the first ever paid invoice if there is one.
  *
@@ -356,19 +355,10 @@ bool wallet_htlcs_reconnect(struct wallet *wallet,
  * @wallet: Wallet to query
  * @pay_index: The paid invoice returned will have pay_index greater
  * than this argument.
- * @outlabel: Pointer to label of found paid invoice. Caller
- * must free if this function returns true.
- * @outrhash: Pointer to struct rhash to be filled.
- * @outmsatoshi: Pointer to number of millisatoshis value to pay.
- * @outpay_index: Pointer to pay_index of found paid invoice.
- */
-bool wallet_invoice_nextpaid(const tal_t *cxt,
-			     const struct wallet *wallet,
-			     u64 pay_index,
-			     char **outlabel,
-			     struct sha256 *outrhash,
-			     u64 *outmsatoshi,
-			     u64 *outpay_index);
+ */
+struct invoice *wallet_invoice_nextpaid(const tal_t *ctx,
+					const struct wallet *wallet,
+					u64 pay_index);
 
 /**
  * wallet_invoice_save -- Save/update an invoice to the wallet