fix(proxy): reset login activity timer

Co-Authored-By: Virgil <virgil@lethean.io>

miner_runtime.go

@@ -213,6 +213,7 @@ func (m *Miner) handleLogin(request minerRequest) {
 		m.events.Dispatch(Event{Type: EventLogin, Miner: m})
 	}
 
+	m.Touch()
 	if m.State() == MinerStateClosing {
 		return
 	}

miner_runtime_test.go

@@ -14,9 +14,12 @@ func TestMiner_Login_Good(t *testing.T) {
 	defer clientConn.Close()
 
 	miner := NewMiner(serverConn, 3333, nil)
+	before := miner.LastActivityAt()
 	miner.Start()
 	defer miner.Close()
 
+	time.Sleep(5 * time.Millisecond)
+
 	encoder := json.NewEncoder(clientConn)
 	if err := encoder.Encode(map[string]interface{}{
 		"id":      1,
@@ -45,6 +48,9 @@ func TestMiner_Login_Good(t *testing.T) {
 	if response["jsonrpc"] != "2.0" {
 		t.Fatalf("unexpected response: %#v", response)
 	}
+	if !miner.LastActivityAt().After(before) {
+		t.Fatalf("expected login to refresh last activity timestamp, got before=%s after=%s", before, miner.LastActivityAt())
+	}
 
 	result := response["result"].(map[string]interface{})
 	id, _ := result["id"].(string)

proxy_runtime.go

@@ -2,6 +2,7 @@ package proxy
 
 import (
 	"crypto/tls"
+	"errors"
 	"net"
 	"time"
 )
@@ -15,6 +16,9 @@ type splitterShutdown interface {
 //
 //	p, errorValue := proxy.New(config)
 func New(config *Config) (*Proxy, error) {
+	if config == nil {
+		return nil, errors.New("config is nil")
+	}
 	if errorValue := config.Validate(); errorValue != nil {
 		return nil, errorValue
 	}