feat(p2p): support tcp protocol

gold/p2p/tcp/init.go

@@ -0,0 +1,41 @@
+package tcp
+
+import (
+	"net"
+	"net/netip"
+	"time"
+
+	"github.com/fumiama/WireGold/gold/p2p"
+)
+
+type Config struct {
+	PeersTimeout       time.Duration
+	ReceiveChannelSize int
+}
+
+func NewEndpoint(endpoint string, configs ...any) p2p.EndPoint {
+	return newEndpoint(endpoint, configs...)
+}
+
+func newEndpoint(endpoint string, configs ...any) *EndPoint {
+	var cfg *Config
+	if len(configs) == 0 || configs[0] == nil {
+		cfg = &Config{}
+	} else {
+		cfg = configs[0].(*Config)
+	}
+	return &EndPoint{
+		addr: net.TCPAddrFromAddrPort(
+			netip.MustParseAddrPort(endpoint),
+		),
+		peerstimeout: cfg.PeersTimeout,
+		recvchansize: cfg.ReceiveChannelSize,
+	}
+}
+
+func init() {
+	_, hasexist := p2p.Register("tcp", NewEndpoint)
+	if hasexist {
+		panic("network tcp has been registered")
+	}
+}