feat: add GetID method to retrieve peer identifier string

Author: ordishs

README.md

@@ -217,6 +217,14 @@ func (c *Client) GetPeers() []PeerInfo
 
 Returns information about all known peers on subscribed topics.
 
+#### GetID
+
+```go
+func (c *Client) GetID() string
+```
+
+Returns this peer's ID as a string.
+
 #### GetPrivateKeyHex
 
 ```go

client.go

@@ -294,6 +294,11 @@ func (c *Client) GetPeers() []PeerInfo {
 	return peers
 }
 
+// GetID returns this peer's ID as a string.
+func (c *Client) GetID() string {
+	return c.host.ID().String()
+}
+
 // Close shuts down the client and releases all resources.
 func (c *Client) Close() error {
 	c.cancel()
@@ -590,11 +595,3 @@ func PrivateKeyFromHex(keyHex string) (crypto.PrivKey, error) {
 
 	return priv, nil
 }
-
-func keyToHex(priv crypto.PrivKey) string {
-	keyBytes, err := crypto.MarshalPrivateKey(priv)
-	if err != nil {
-		return ""
-	}
-	return hex.EncodeToString(keyBytes)
-}

example/main.go

@@ -98,7 +98,7 @@ func main() {
 				if err := client.Publish(topicName, []byte(data)); err != nil {
 					return
 				}
-				fmt.Printf("[%-20s] %s: %s\n", "local", *name, data)
+				fmt.Printf("[%-52s] %s: %s\n", "local", *name, data)
 			}
 		}
 	}()