Manually accept inbound channels

Since we plan to add support for opening anchor outputs channels, we'll
need to support manually accepting inbound channels first to do so.

diff --git a/src/main.rs b/src/main.rs
index 938df1232390ac589a20a0d2425fcaeb2d8c3480..ba9d8fcb19c644473bd5d3f8a07af782e90857ef 100644 (file)
--- a/src/main.rs
+++ b/src/main.rs
@@ -278,8 +278,34 @@ async fn handle_ldk_events(
                        }
                        persister.persist(OUTBOUND_PAYMENTS_FNAME, &*outbound).unwrap();
                }
-               Event::OpenChannelRequest { .. } => {
-                       // Unreachable, we don't set manually_accept_inbound_channels
+               Event::OpenChannelRequest {
+                       ref temporary_channel_id, ref counterparty_node_id, ..
+               } => {
+                       let mut random_bytes = [0u8; 16];
+                       random_bytes.copy_from_slice(&keys_manager.get_secure_random_bytes()[..16]);
+                       let user_channel_id = u128::from_be_bytes(random_bytes);
+                       let res = channel_manager.accept_inbound_channel(
+                               temporary_channel_id,
+                               counterparty_node_id,
+                               user_channel_id,
+                       );
+
+                       if let Err(e) = res {
+                               print!(
+                                       "\nEVENT: Failed to accept inbound channel ({}) from {}: {:?}",
+                                       hex_utils::hex_str(&temporary_channel_id[..]),
+                                       hex_utils::hex_str(&counterparty_node_id.serialize()),
+                                       e,
+                               );
+                       } else {
+                               print!(
+                                       "\nEVENT: Accepted inbound channel ({}) from {}",
+                                       hex_utils::hex_str(&temporary_channel_id[..]),
+                                       hex_utils::hex_str(&counterparty_node_id.serialize()),
+                               );
+                       }
+                       print!("> ");
+                       io::stdout().flush().unwrap();
                }
                Event::PaymentPathSuccessful { .. } => {}
                Event::PaymentPathFailed { .. } => {}
@@ -566,6 +592,7 @@ async fn start_ldk() {
        // Step 11: Initialize the ChannelManager
        let mut user_config = UserConfig::default();
        user_config.channel_handshake_limits.force_announced_channel_preference = false;
+       user_config.manually_accept_inbound_channels = true;
        let mut restarting_node = true;
        let (channel_manager_blockhash, channel_manager) = {
                if let Ok(mut f) = fs::File::open(format!("{}/manager", ldk_data_dir.clone())) {