diff --git a/.gitignore b/.gitignore
index 6771b32..caa4b93 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,8 +51,7 @@ playground.xcworkspace
 # Carthage
 #
 # Add this line if you want to avoid checking in source code from Carthage dependencies.
-# Carthage/Checkouts
-
+Carthage/Checkouts
 Carthage/Build
 
 # fastlane
diff --git a/Sources/libp2p/Enums/State.swift b/Sources/libp2p/Enums/State.swift
new file mode 100644
index 0000000..607f3cd
--- /dev/null
+++ b/Sources/libp2p/Enums/State.swift
@@ -0,0 +1,8 @@
+import Foundation
+
+enum State {
+    case stopped
+    case starting
+    case started
+    case stopping
+}
diff --git a/Sources/libp2p/Node/Node.swift b/Sources/libp2p/Node/Node.swift
new file mode 100644
index 0000000..38e570f
--- /dev/null
+++ b/Sources/libp2p/Node/Node.swift
@@ -0,0 +1,57 @@
+import Foundation
+
+public class Node {
+
+    var delegate: NodeDelegate?
+
+    private(set) var state: State {
+        didSet {
+            switch (state) {
+            case .started:
+                delegate?.nodeDidStart(self)
+            case .stopped:
+                delegate?.nodeDidStop(self)
+            case .starting:
+                onStarting()
+            case .stopping:
+                onStopping()
+            }
+        }
+    }
+
+    private(set) var peerBook: PeerBook
+
+    init() {
+        state = .stopped
+        peerBook = PeerBook()
+    }
+
+    func isStarted() -> Bool {
+        return state == .started
+    }
+
+    // @todo on the any
+    func dial(peer: Any, protocol: String) {
+
+    }
+
+    func dialFSM(peer: Any, protocol: String) {
+
+    }
+
+    func hangUp(peer: Any) {
+
+    }
+
+    func ping(peer: Any) {
+
+    }
+
+    private func onStarting() {
+
+    }
+
+    private func onStopping() {
+
+    }
+}
diff --git a/Sources/libp2p/Node/NodeDelegate.swift b/Sources/libp2p/Node/NodeDelegate.swift
new file mode 100644
index 0000000..d26d731
--- /dev/null
+++ b/Sources/libp2p/Node/NodeDelegate.swift
@@ -0,0 +1,12 @@
+import Foundation
+
+public protocol NodeDelegate {
+
+    func node(_ node: Node, didEmitError: Error);
+    func node(_ node: Node, didConnectPeer: PeerInfo);
+    func node(_ node: Node, didDisconnectPeer: PeerInfo);
+    func node(_ node: Node, didDiscoverPeer: PeerInfo);
+    func nodeDidStart(_ node: Node);
+    func nodeDidStop(_ node: Node);
+
+}
diff --git a/Sources/libp2p/Peer/PeerInfo.swift b/Sources/libp2p/Peer/PeerInfo.swift
new file mode 100644
index 0000000..0b0802e
--- /dev/null
+++ b/Sources/libp2p/Peer/PeerInfo.swift
@@ -0,0 +1,8 @@
+import Foundation
+import SwiftMultiaddr
+
+public struct PeerInfo {
+    let id: Data // @todo
+    let multiaddrs: [Multiaddr]
+    let protocols: [String] // @todo
+}
diff --git a/Sources/libp2p/PeerBook.swift b/Sources/libp2p/PeerBook.swift
new file mode 100644
index 0000000..f34a3fe
--- /dev/null
+++ b/Sources/libp2p/PeerBook.swift
@@ -0,0 +1,33 @@
+import Foundation
+import SwiftMultiaddr
+
+class PeerBook {
+
+    private(set) var peers = [String:PeerInfo]()
+
+    func has(_ peer: Any) -> Bool {
+
+    }
+
+    func put(_ peer: PeerInfo) {
+
+    }
+
+    func get(_ peer: Any) -> PeerInfo? {
+        return peers[b58String(peer)]
+    }
+
+    func remove(_ peer: Any) {
+        peers.removeValue(forKey: b58String(peer))
+    }
+
+    // @todo MultiAddr type
+    func getMultiAddrs(_ peer: Any) -> [MultiAddr]? {
+        let info = get(peer)
+        return info?.multiaddrs
+    }
+
+    func b58String(_ peer: Any) -> String {
+
+    }
+}
diff --git a/Sources/libp2p/TCP/TCP.swift b/Sources/libp2p/TCP/TCP.swift
new file mode 100644
index 0000000..82e85a9
--- /dev/null
+++ b/Sources/libp2p/TCP/TCP.swift
@@ -0,0 +1,20 @@
+import Foundation
+
+class TCP {
+
+    // @todo add option
+    func dial(multiAddress: String) {
+
+    }
+
+    // @todo
+    func createListener() {
+
+    }
+
+    // @todo
+    func filter(multiAddresses: [String]) {
+
+    }
+
+}
diff --git a/Sources/libp2p/libp2p.swift b/Sources/libp2p/libp2p.swift
deleted file mode 100644
index c15936d..0000000
--- a/Sources/libp2p/libp2p.swift
+++ /dev/null
@@ -1,3 +0,0 @@
-class libp2p {
-
-}