added ulc config params (#1255)

* added ulc config params

* fmt

* fix lint

node/node.go

@@ -218,6 +218,10 @@ func activateLightEthService(stack *node.Node, config *params.NodeConfig) error
 	ethConf.SyncMode = downloader.LightSync
 	ethConf.NetworkId = config.NetworkID
 	ethConf.DatabaseCache = config.LightEthConfig.DatabaseCache
+	ethConf.ULC = &eth.ULCConfig{
+		TrustedServers:     config.LightEthConfig.TrustedNodes,
+		MinTrustedFraction: config.LightEthConfig.MinTrustedFraction,
+	}
 	return stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
 		return les.New(ctx, &ethConf)
 	})

params/config.go

@@ -31,6 +31,12 @@ type LightEthConfig struct {
 
 	// DatabaseCache is memory (in MBs) allocated to internal caching (min 16MB / database forced)
 	DatabaseCache int
+
+	// TrustedNodes is a list of trusted servers
+	TrustedNodes []string
+
+	//MinTrustedFraction is minimum percentage of connected trusted servers to validate header(1-100)
+	MinTrustedFraction int
 }
 
 // ----------

services/rpcfilters/api.go

@@ -48,9 +48,9 @@ func NewPublicAPI(s *Service) *PublicAPI {
 		filters:                        make(map[rpc.ID]filter),
 		latestBlockChangedEvent:        s.latestBlockChangedEvent,
 		transactionSentToUpstreamEvent: s.transactionSentToUpstreamEvent,
-		client:               func() ContextCaller { return s.rpc.RPCClient() },
-		filterLivenessLoop:   defaultFilterLivenessPeriod,
-		filterLivenessPeriod: defaultFilterLivenessPeriod + 10*time.Second,
+		client:                         func() ContextCaller { return s.rpc.RPCClient() },
+		filterLivenessLoop:             defaultFilterLivenessPeriod,
+		filterLivenessPeriod:           defaultFilterLivenessPeriod + 10*time.Second,
 	}
 	go api.timeoutLoop(s.quit)
 	return api

services/rpcfilters/service.go

@@ -27,7 +27,7 @@ func New(rpc rpcProvider) *Service {
 	return &Service{
 		latestBlockChangedEvent:        latestBlockChangedEvent,
 		transactionSentToUpstreamEvent: transactionSentToUpstreamEvent,
-		rpc: rpc,
+		rpc:                            rpc,
 	}
 }