Function json_queryrates

lightningd/dual_open_control.c:3815–3959

}

static struct command_result *json_queryrates(struct command *cmd,
					      const char *buffer,
					      const jsmntok_t *obj UNNEEDED,
					      const jsmntok_t *params)
{
	struct node_id *id;
	struct peer *peer;
	struct channel *channel;
	u32 *feerate_per_kw_funding;
	u32 *feerate_per_kw, anchor_feerate;
	struct amount_sat *amount, *request_amt;
	struct wally_psbt *psbt;
	struct open_attempt *oa;
	u32 *our_upfront_shutdown_script_wallet_index;
	struct command_result *res;
	int fds[2];

	if (!param_check(cmd, buffer, params,
			 p_req("id", param_node_id, &id),
			 p_req("amount", param_sat, &amount),
			 p_req("request_amt", param_sat, &request_amt),
			 p_opt("commitment_feerate", param_feerate, &feerate_per_kw),
			 p_opt("funding_feerate", param_feerate, &feerate_per_kw_funding),
			 NULL))
		return command_param_failed();

	res = init_set_feerate(cmd, &feerate_per_kw, &feerate_per_kw_funding);
	if (res)
		return res;

	peer = peer_by_id(cmd->ld, id);
	if (!peer) {
		return command_fail(cmd, FUNDING_UNKNOWN_PEER, "Unknown peer");
	}

	if (peer->connected != PEER_CONNECTED)
		return command_fail(cmd, FUNDING_PEER_NOT_CONNECTED,
				    "Peer %s",
				    peer->connected == PEER_DISCONNECTED
				    ? "not connected" : "still connecting");

	if (!feature_negotiated(cmd->ld->our_features,
			        peer->their_features,
				OPT_DUAL_FUND)) {
		return command_fail(cmd, FUNDING_V2_NOT_SUPPORTED,
				    "v2 openchannel not supported "
				    "by peer, can't query rates");
	}

	/* BOLT #2:
	 *  - if both nodes advertised `option_support_large_channel`:
	 *    - MAY set `funding_satoshis` greater than or equal to 2^24 satoshi.
	 *  - otherwise:
	 *    - MUST set `funding_satoshis` to less than 2^24 satoshi.
	 */
	if (!feature_negotiated(cmd->ld->our_features,
				peer->their_features, OPT_LARGE_CHANNELS)
	    && amount_sat_greater(*amount, chainparams->max_funding))