1 files changed, 41 insertions, 0 deletions
diff --git a/karyons_p2p/src/peer/peer_id.rs b/karyons_p2p/src/peer/peer_id.rs
new file mode 100644
index 0000000..c8aec7d
--- /dev/null
+++ b/karyons_p2p/src/peer/peer_id.rs
@@ -0,0 +1,41 @@
+use bincode::{Decode, Encode};
+use rand::{rngs::OsRng, RngCore};
+use sha2::{Digest, Sha256};
+
+/// Represents a unique identifier for a peer.
+#[derive(Clone, Debug, Eq, PartialEq, Hash, Decode, Encode)]
+pub struct PeerID(pub [u8; 32]);
+
+impl std::fmt::Display for PeerID {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        let id = self.0[0..8]
+            .iter()
+            .map(|b| format!("{:x}", b))
+            .collect::<Vec<String>>()
+            .join("");
+
+        write!(f, "{}", id)
+    }
+}
+
+impl PeerID {
+    /// Creates a new PeerID.
+    pub fn new(src: &[u8]) -> Self {
+        let mut hasher = Sha256::new();
+        hasher.update(src);
+        Self(hasher.finalize().into())
+    }
+
+    /// Generates a random PeerID.
+    pub fn random() -> Self {
+        let mut id: [u8; 32] = [0; 32];
+        OsRng.fill_bytes(&mut id);
+        Self(id)
+    }
+}
+
+impl From<[u8; 32]> for PeerID {
+    fn from(b: [u8; 32]) -> Self {
+        PeerID(b)
+    }
+}