feat: add RPC api for searchers and initialize preconf

buf.gen.yaml

@@ -0,0 +1,8 @@
+version: v1
+plugins:
+  - plugin: buf.build/protocolbuffers/go:v1.31.0
+    out: gen/go
+    opt: paths=source_relative
+  - plugin: buf.build/grpc/go
+    out: gen/go
+    opt: paths=source_relative

cmd/main.go

@@ -16,6 +16,7 @@ import (
 const (
 	defaultP2PPort  = 13522
 	defaultHTTPPort = 13523
+	defaultRPCPort  = 13524
 )
 
 var (
@@ -88,6 +89,7 @@ type config struct {
 	PeerType    string   `yaml:"peer_type" json:"peer_type"`
 	P2PPort     int      `yaml:"p2p_port" json:"p2p_port"`
 	HTTPPort    int      `yaml:"http_port" json:"http_port"`
+	RPCPort     int      `yaml:"rpc_port" json:"http_port"`
 	LogFmt      string   `yaml:"log_fmt" json:"log_fmt"`
 	LogLevel    string   `yaml:"log_level" json:"log_level"`
 	Bootnodes   []string `yaml:"bootnodes" json:"bootnodes"`
@@ -114,6 +116,10 @@ func checkConfig(cfg *config) error {
 		cfg.HTTPPort = defaultHTTPPort
 	}
 
+	if cfg.RPCPort == 0 {
+		cfg.RPCPort = defaultRPCPort
+	}
+
 	if cfg.LogFmt == "" {
 		cfg.LogFmt = "text"
 	}