feat: initial peer-sharing support (#3)

listener.go

@@ -19,6 +19,7 @@ import (
 	"net"
 
 	ouroboros "github.com/blinklabs-io/gouroboros"
+	"github.com/blinklabs-io/gouroboros/protocol/peersharing"
 )
 
 type ListenerConfig struct {
@@ -35,6 +36,16 @@ func (n *Node) startListener(l ListenerConfig) {
 		ouroboros.WithPeerSharing(n.config.peerSharing),
 		// TODO: add protocol configs to configure callback functions
 	}
+	if n.config.peerSharing {
+		defaultConnOpts = append(
+			defaultConnOpts,
+			ouroboros.WithPeerSharingConfig(
+				peersharing.NewConfig(
+					peersharing.WithShareRequestFunc(n.peersharingShareRequest),
+				),
+			),
+		)
+	}
 	for {
 		// Accept connection
 		conn, err := l.Listener.Accept()

node.go

@@ -54,7 +54,6 @@ func (n *Node) Run() error {
 
 	// Wait forever
 	select {}
-	return nil
 }
 
 func (n *Node) connectionManagerConnClosed(connId ouroboros.ConnectionId, err error) {

peersharing.go

@@ -0,0 +1,24 @@
+// Copyright 2024 Blink Labs Software
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package node
+
+import (
+	"github.com/blinklabs-io/gouroboros/protocol/peersharing"
+)
+
+func (n *Node) peersharingShareRequest(ctx peersharing.CallbackContext, amount int) ([]peersharing.PeerAddress, error) {
+	// TODO: add hooks for getting peers to share
+	return []peersharing.PeerAddress{}, nil
+}