Function handle_error

plugins/fetchinvoice.c:74–131

Returns NULL if it wasn't an error. */

/* Returns NULL if it wasn't an error. */
static struct command_result *handle_error(struct command *cmd,
					   struct sent *sent,
					   const char *buf,
					   const jsmntok_t *om)
{
	const u8 *data;
	size_t dlen;
	struct tlv_invoice_error *err;
	struct json_out *details;
	const jsmntok_t *errtok;

	errtok = json_get_member(buf, om, "invoice_error");
	if (!errtok)
		return NULL;

	data = json_tok_bin_from_hex(cmd, buf, errtok);
	dlen = tal_bytelen(data);
	details = json_out_new(cmd);

	plugin_log(cmd->plugin, LOG_DBG, "errtok = %.*s",
		   json_tok_full_len(errtok),
		   json_tok_full(buf, errtok));
	json_out_start(details, NULL, '{');
	err = fromwire_tlv_invoice_error(cmd, &data, &dlen);
	if (!err) {
		plugin_log(cmd->plugin, LOG_DBG,
			   "Invalid invoice_error %.*s",
			   json_tok_full_len(errtok),
			   json_tok_full(buf, errtok));
		json_out_addstr(details, "invoice_error_hex",
				tal_strndup(tmpctx,
					    buf + errtok->start,
					    errtok->end - errtok->start));
	} else {
		char *failstr;

		/* FIXME: with a bit more generate-wire.py support,
		 * we could have fieldnames and even types. */
		if (err->erroneous_field)
			json_out_add(details, "erroneous_field", false,
				     "%"PRIu64, *err->erroneous_field);
		if (err->suggested_value)
			json_out_addstr(details, "suggested_value",
					tal_hex(tmpctx,
						err->suggested_value));
		/* If they don't include this, it'll be empty */
		failstr = tal_strndup(tmpctx,
				      err->error,
				      tal_bytelen(err->error));
		json_out_addstr(details, "error", failstr);
	}
	json_out_end(details, '}');
	discard_result(command_done_err(sent->cmd,
					OFFER_BAD_INVREQ_REPLY,
					"Remote node sent failure message",
						details));
	return command_hook_success(cmd);
}