lightningd/json: Move json helpers specific for lightningd to new module.

lightningd/json.c

@@ -0,0 +1,134 @@
+#include "json.h"
+#include <arpa/inet.h>
+#include <ccan/str/hex/hex.h>
+#include <common/json.h>
+#include <common/type_to_string.h>
+#include <common/wireaddr.h>
+#include <gossipd/routing.h>
+#include <lightningd/options.h>
+#include <sys/socket.h>
+#include <wallet/wallet.h>
+
+/* Output a route hop */
+static void
+json_add_route_hop(struct json_result *r, char const *n,
+		   const struct route_hop *h)
+{
+	/* Imitate what getroute/sendpay use */
+	json_object_start(r, n);
+	json_add_pubkey(r, "id", &h->nodeid);
+	json_add_short_channel_id(r, "channel",
+				  &h->channel_id);
+	json_add_u64(r, "msatoshi", h->amount);
+	json_add_num(r, "delay", h->delay);
+	json_object_end(r);
+}
+
+/* Output a route */
+void
+json_add_route(struct json_result *r, char const *n,
+	       const struct route_hop *hops, size_t hops_len)
+{
+	size_t i;
+	json_array_start(r, n);
+	for (i = 0; i < hops_len; ++i) {
+		json_add_route_hop(r, NULL, &hops[i]);
+	}
+	json_array_end(r);
+}
+
+/* Outputs fields, not a separate object*/
+void
+json_add_payment_fields(struct json_result *response,
+			const struct wallet_payment *t)
+{
+	json_add_u64(response, "id", t->id);
+	json_add_hex(response, "payment_hash", &t->payment_hash, sizeof(t->payment_hash));
+	json_add_pubkey(response, "destination", &t->destination);
+	json_add_u64(response, "msatoshi", t->msatoshi);
+	if (deprecated_apis)
+		json_add_u64(response, "timestamp", t->timestamp);
+	json_add_u64(response, "created_at", t->timestamp);
+
+	switch (t->status) {
+	case PAYMENT_PENDING:
+		json_add_string(response, "status", "pending");
+		break;
+	case PAYMENT_COMPLETE:
+		json_add_string(response, "status", "complete");
+		break;
+	case PAYMENT_FAILED:
+		json_add_string(response, "status", "failed");
+		break;
+	}
+	if (t->payment_preimage)
+		json_add_hex(response, "payment_preimage",
+			     t->payment_preimage,
+			     sizeof(*t->payment_preimage));
+}
+
+void json_add_pubkey(struct json_result *response,
+		     const char *fieldname,
+		     const struct pubkey *key)
+{
+	u8 der[PUBKEY_DER_LEN];
+
+	pubkey_to_der(der, key);
+	json_add_hex(response, fieldname, der, sizeof(der));
+}
+
+void json_add_txid(struct json_result *result, const char *fieldname,
+		   const struct bitcoin_txid *txid)
+{
+	char hex[hex_str_size(sizeof(*txid))];
+
+	bitcoin_txid_to_hex(txid, hex, sizeof(hex));
+	json_add_string(result, fieldname, hex);
+}
+
+bool json_tok_pubkey(const char *buffer, const jsmntok_t *tok,
+		     struct pubkey *pubkey)
+{
+	return pubkey_from_hexstr(buffer + tok->start,
+				  tok->end - tok->start, pubkey);
+}
+
+void json_add_short_channel_id(struct json_result *response,
+			       const char *fieldname,
+			       const struct short_channel_id *id)
+{
+	json_add_string(response, fieldname,
+			type_to_string(response, struct short_channel_id, id));
+}
+
+bool json_tok_short_channel_id(const char *buffer, const jsmntok_t *tok,
+			       struct short_channel_id *scid)
+{
+	return short_channel_id_from_str(buffer + tok->start,
+					 tok->end - tok->start,
+					 scid);
+}
+
+void json_add_address(struct json_result *response, const char *fieldname,
+		      const struct wireaddr *addr)
+{
+	/* No need to print padding */
+	if (addr->type == ADDR_TYPE_PADDING)
+		return;
+
+	json_object_start(response, fieldname);
+	char *addrstr = tal_arr(response, char, INET6_ADDRSTRLEN);
+	if (addr->type == ADDR_TYPE_IPV4) {
+		inet_ntop(AF_INET, addr->addr, addrstr, INET_ADDRSTRLEN);
+		json_add_string(response, "type", "ipv4");
+		json_add_string(response, "address", addrstr);
+		json_add_num(response, "port", addr->port);
+	} else if (addr->type == ADDR_TYPE_IPV6) {
+		inet_ntop(AF_INET6, addr->addr, addrstr, INET6_ADDRSTRLEN);
+		json_add_string(response, "type", "ipv6");
+		json_add_string(response, "address", addrstr);
+		json_add_num(response, "port", addr->port);
+	}
+	json_object_end(response);
+}
+