Function json_getroutes

plugins/askrene/askrene.c:890–969

}

static struct command_result *json_getroutes(struct command *cmd,
					     const char *buffer,
					     const jsmntok_t *params)
{
	/* BOLT #4:
	 * ## `max_htlc_cltv` Selection
	 *
	 * This ... value is defined as 2016 blocks, based on
	 * historical value deployed by Lightning implementations.
	 */
	/* FIXME: Typo in spec for CLTV in descripton! But it breaks our spelling check, so we omit it above */
	const u32 maxdelay_allowed = 2016;
	struct askrene *askrene = get_askrene(cmd->plugin);
	const u32 default_maxparts = 100;
	struct getroutes_info *info = tal(cmd, struct getroutes_info);
	/* param functions require pointers */
	struct node_id *source, *dest;
	struct amount_msat *amount, *maxfee;
	u32 *finalcltv, *maxdelay;
	enum algorithm *dev_algo;
	u32 *maxparts;

	if (!param_check(cmd, buffer, params,
			 p_req("source", param_node_id, &source),
			 p_req("destination", param_node_id, &dest),
			 p_req("amount_msat", param_msat, &amount),
			 p_req("layers", param_layer_names, &info->layers),
			 p_req("maxfee_msat", param_msat, &maxfee),
			 p_req("final_cltv", param_u32, &finalcltv),
			 p_opt_def("maxdelay", param_u32, &maxdelay,
				   maxdelay_allowed),
			 p_opt_def("maxparts", param_u32, &maxparts,
				   default_maxparts),
			 p_opt_dev("dev_algorithm", param_algorithm,
				   &dev_algo, ALGO_DEFAULT),
			 NULL))
		return command_param_failed();
	plugin_log(cmd->plugin, LOG_TRACE, "%s called: %.*s", __func__,
		   json_tok_full_len(params), json_tok_full(buffer, params));

	if (amount_msat_is_zero(*amount)) {
		return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
				    "amount must be non-zero");
	}

	if (maxparts == 0) {
		return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
				    "maxparts must be non-zero");
	}

	if (*maxdelay > maxdelay_allowed) {
		return command_fail(cmd, PAY_USER_ERROR,
				    "maximum delay allowed is %d",
				    maxdelay_allowed);
	}

	if (command_check_only(cmd))
		return command_check_done(cmd);