Add ChannelConfig options to open channel cli command

These were available on the server side but not in the cli. Not all
options are given as they aren't likely to be used and more likely to be
confusing to users.

Author: benthecarman

ldk-server-cli/src/main.rs

@@ -11,7 +11,8 @@ use ldk_server_client::ldk_server_protos::api::{
 	OpenChannelRequest,
 };
 use ldk_server_client::ldk_server_protos::types::{
-	bolt11_invoice_description, Bolt11InvoiceDescription, PageToken, Payment,
+	bolt11_invoice_description, channel_config, Bolt11InvoiceDescription, ChannelConfig, PageToken,
+	Payment,
 };
 use std::fmt::Debug;
 
@@ -101,6 +102,22 @@ enum Commands {
 		push_to_counterparty_msat: Option<u64>,
 		#[arg(long)]
 		announce_channel: bool,
+		// Channel config options
+		#[arg(
+			long,
+			help = "Amount (in millionths of a satoshi) charged per satoshi for payments forwarded outbound over the channel. This can be updated by using update-channel-config."
+		)]
+		forwarding_fee_proportional_millionths: Option<u32>,
+		#[arg(
+			long,
+			help = "Amount (in milli-satoshi) charged for payments forwarded outbound over the channel, in excess of forwarding_fee_proportional_millionths. This can be updated by using update-channel-config."
+		)]
+		forwarding_fee_base_msat: Option<u32>,
+		#[arg(
+			long,
+			help = "The difference in the CLTV value between incoming HTLCs and an outbound HTLC forwarded over the channel. This can be updated by using update-channel-config."
+		)]
+		cltv_expiry_delta: Option<u32>,
 	},
 	ListChannels,
 	ListPayments {
@@ -213,15 +230,24 @@ async fn main() {
 			channel_amount_sats,
 			push_to_counterparty_msat,
 			announce_channel,
+			forwarding_fee_proportional_millionths,
+			forwarding_fee_base_msat,
+			cltv_expiry_delta,
 		} => {
+			let channel_config = build_open_channel_config(
+				forwarding_fee_proportional_millionths,
+				forwarding_fee_base_msat,
+				cltv_expiry_delta,
+			);
+
 			handle_response_result(
 				client
 					.open_channel(OpenChannelRequest {
 						node_pubkey,
 						address,
 						channel_amount_sats,
 						push_to_counterparty_msat,
-						channel_config: None,
+						channel_config,
 						announce_channel,
 					})
 					.await,
@@ -236,6 +262,28 @@ async fn main() {
 	}
 }
 
+fn build_open_channel_config(
+	forwarding_fee_proportional_millionths: Option<u32>, forwarding_fee_base_msat: Option<u32>,
+	cltv_expiry_delta: Option<u32>,
+) -> Option<ChannelConfig> {
+	// Only create a config if at least one field is set
+	if forwarding_fee_proportional_millionths.is_none()
+		&& forwarding_fee_base_msat.is_none()
+		&& cltv_expiry_delta.is_none()
+	{
+		return None;
+	}
+
+	Some(ChannelConfig {
+		forwarding_fee_proportional_millionths,
+		forwarding_fee_base_msat,
+		cltv_expiry_delta,
+		force_close_avoidance_max_fee_satoshis: None,
+		accept_underpaying_htlcs: None,
+		max_dust_htlc_exposure: None,
+	})
+}
+
 async fn list_n_payments(
 	client: LdkServerClient, number_of_payments: Option<u64>,
 ) -> Result<Vec<Payment>, LdkServerError> {