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jsonrpc: Create a struct for notifications that we send

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Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker 2018-12-11 18:14:15 +01:00
parent c57e63b31d
commit 9ad2f57e46
2 changed files with 41 additions and 0 deletions
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20
lightningd/jsonrpc.c
View file

@ -1004,6 +1004,26 @@ static struct command_result *param_command(struct command *cmd,
tok->end - tok->start, buffer + tok->start);
}
struct jsonrpc_notification *jsonrpc_notification_start(const tal_t *ctx, const char *method)
{
struct jsonrpc_notification *n = tal(ctx, struct jsonrpc_notification);
n->method = tal_strdup(n, method);
n->stream = new_json_stream(n, NULL);
json_object_start(n->stream, NULL);
json_add_string(n->stream, "jsonrpc", "2.0");
json_add_string(n->stream, "method", method);
json_object_start(n->stream, "params");
return n;
}
void jsonrpc_notification_end(struct jsonrpc_notification *n)
{
json_object_end(n->stream); /* closes '.params' */
json_object_end(n->stream); /* closes '.' */
json_stream_append(n->stream, "\n\n");
}
/* We add this destructor as a canary to detect cmd failing. */
static void destroy_command_canary(struct command *cmd, bool *failed)
{

21
lightningd/jsonrpc.h
View file

@ -58,6 +58,14 @@ struct json_command {
const char *verbose;
};
struct jsonrpc_notification {
/* The topic that this notification is for. Internally this
* will be serialized as "method", hence the different name
* here */
const char *method;
struct json_stream *stream;
};
/**
* json_stream_success - start streaming a successful json result.
* @cmd: the command we're running.
@ -162,5 +170,18 @@ bool jsonrpc_command_add(struct jsonrpc *rpc, struct json_command *command);
*/
void jsonrpc_command_remove(struct jsonrpc *rpc, const char *method);
/**
* Begin a JSON-RPC notification with the specified topic.
*
* Automatically starts the `params` object, hence only key-value
* based params are supported at the moment.
*/
struct jsonrpc_notification *jsonrpc_notification_start(const tal_t *ctx, const char *topic);
/**
* Counterpart to jsonrpc_notification_start.
*/
void jsonrpc_notification_end(struct jsonrpc_notification *n);
AUTODATA_TYPE(json_command, struct json_command);
#endif /* LIGHTNING_LIGHTNINGD_JSONRPC_H */