Merge pull request #1173 from tnull/add_accept_inbound_channels_option

Add 'accept_inbound_channels' config option.

Author: TheBlueMatt

lightning/src/ln/channelmanager.rs

@@ -3646,6 +3646,10 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
 			return Err(MsgHandleErrInternal::send_err_msg_no_close("Unknown genesis block hash".to_owned(), msg.temporary_channel_id.clone()));
 		}
 
+		if !self.default_configuration.accept_inbound_channels {
+			return Err(MsgHandleErrInternal::send_err_msg_no_close("No inbound channels accepted".to_owned(), msg.temporary_channel_id.clone()));
+		}
+
 		let channel = Channel::new_from_req(&self.fee_estimator, &self.keys_manager, counterparty_node_id.clone(),
 				&their_features, msg, 0, &self.default_configuration, self.best_block.read().unwrap().height())
 			.map_err(|e| MsgHandleErrInternal::from_chan_no_close(e, msg.temporary_channel_id))?;

lightning/src/util/config.rs

@@ -302,6 +302,9 @@ pub struct UserConfig {
 	///
 	/// Default value: false.
 	pub accept_forwards_to_priv_channels: bool,
+	/// If this is set to false, we do not accept inbound requests to open a new channel.
+	/// Default value: true.
+	pub accept_inbound_channels: bool,
 }
 
 impl Default for UserConfig {
@@ -311,6 +314,7 @@ impl Default for UserConfig {
 			peer_channel_config_limits: ChannelHandshakeLimits::default(),
 			channel_options: ChannelConfig::default(),
 			accept_forwards_to_priv_channels: false,
+			accept_inbound_channels: true,
 		}
 	}
 }