initial commit of p2p package

p2p/client_identity.go

@@ -0,0 +1,63 @@
+package p2p
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// should be used in Peer handleHandshake, incorporate Caps, ProtocolVersion, Pubkey etc.
+type ClientIdentity interface {
+	String() string
+	Pubkey() []byte
+}
+
+type SimpleClientIdentity struct {
+	clientIdentifier string
+	version          string
+	customIdentifier string
+	os               string
+	implementation   string
+	pubkey           string
+}
+
+func NewSimpleClientIdentity(clientIdentifier string, version string, customIdentifier string, pubkey string) *SimpleClientIdentity {
+	clientIdentity := &SimpleClientIdentity{
+		clientIdentifier: clientIdentifier,
+		version:          version,
+		customIdentifier: customIdentifier,
+		os:               runtime.GOOS,
+		implementation:   runtime.Version(),
+		pubkey:           pubkey,
+	}
+
+	return clientIdentity
+}
+
+func (c *SimpleClientIdentity) init() {
+}
+
+func (c *SimpleClientIdentity) String() string {
+	var id string
+	if len(c.customIdentifier) > 0 {
+		id = "/" + c.customIdentifier
+	}
+
+	return fmt.Sprintf("%s/v%s%s/%s/%s",
+		c.clientIdentifier,
+		c.version,
+		id,
+		c.os,
+		c.implementation)
+}
+
+func (c *SimpleClientIdentity) Pubkey() []byte {
+	return []byte(c.pubkey)
+}
+
+func (c *SimpleClientIdentity) SetCustomIdentifier(customIdentifier string) {
+	c.customIdentifier = customIdentifier
+}
+
+func (c *SimpleClientIdentity) GetCustomIdentifier() string {
+	return c.customIdentifier
+}