diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3f4b52a
--- /dev/null
+++ b/README.md
@@ -0,0 +1,89 @@
+Example config:
+
+```json
+{
+  "public_ip": "127.0.0.1",
+  "local_ip": "0.0.0.0",
+  "port": 30000,
+  "network": {
+    "quic": null,
+    "connection_manager_channel_capacity": 128,
+    "connectivity_check_interval": "5s",
+    "max_frame_size": 104857600,
+    "connect_timeout": "10s",
+    "connection_backoff": "10s",
+    "max_connection_backoff": "1m",
+    "connection_error_delay": "3s",
+    "max_concurrent_outstanding_connections": 100,
+    "max_concurrent_connections": null,
+    "active_peers_event_channel_capacity": 128,
+    "shutdown_idle_timeout": "1m",
+    "enable_0rtt": false
+  },
+  "dht": {
+    "max_k": 6,
+    "max_peer_info_ttl": "1h",
+    "max_stored_value_ttl": "1h",
+    "max_storage_capacity": 10000,
+    "storage_item_time_to_idle": null,
+    "local_info_refresh_period": "1m",
+    "local_info_announce_period": "10m",
+    "local_info_announce_period_max_jitter": "1m",
+    "routing_table_refresh_period": "10m",
+    "routing_table_refresh_period_max_jitter": "1m",
+    "announced_peers_channel_capacity": 10
+  },
+  "peer_resolver": {
+    "max_parallel_resolve_requests": 100,
+    "min_ttl_sec": 600,
+    "update_before_sec": 1200,
+    "fast_retry_count": 10,
+    "min_retry_interval": "1s",
+    "max_retry_interval": "2m",
+    "stale_retry_interval": "10m"
+  },
+  "overlay": {
+    "public_overlay_peer_store_period": "3m",
+    "public_overlay_peer_store_max_jitter": "30s",
+    "public_overlay_peer_store_max_entries": 20,
+    "public_overlay_peer_exchange_period": "3m",
+    "public_overlay_peer_exchange_max_jitter": "30s",
+    "public_overlay_peer_discovery_period": "3m",
+    "public_overlay_peer_discovery_max_jitter": "30s",
+    "exchange_public_entries_batch": 20
+  },
+  "public_overlay_client": {
+    "neighbours_update_interval": "2m",
+    "neighbours_ping_interval": "30s",
+    "max_neighbours": 5,
+    "max_ping_tasks": 5,
+    "default_roundtrip": "300ms"
+  },
+  "storage": {
+    "root_dir": "/var/node/db",
+    "rocksdb_enable_metrics": false,
+    "rocksdb_lru_capacity": "32 GB",
+    "cells_cache_size": "4.3 GB"
+  },
+  "blockchain_rpc_service": {
+    "max_key_blocks_list_len": 8,
+    "serve_persistent_states": true
+  },
+  "blockchain_block_provider": {
+    "get_next_block_polling_interval": "1s",
+    "get_block_polling_interval": "1s"
+  },
+  "kafka": {
+    "brokers": "broker1:9092,broker2:9092,broker3:9092",
+    "topic": "transactions",
+    "group_id": "tycho-kafka-producer",
+    "security_config": {
+      "kind": "Ssl",
+      "security_protocol": "Ssl",
+      "ssl_ca_location": "/var/node/ssl/ca.crt",
+      "ssl_certificate_location": "/var/node/ssl/client.crt",
+      "ssl_key_location": "/var/node/ssl/client.key"
+    }
+  }
+}
+```
\ No newline at end of file
diff --git a/kafka-producer/src/config.rs b/kafka-producer/src/config.rs
index a0a0fd8..80b4f01 100644
--- a/kafka-producer/src/config.rs
+++ b/kafka-producer/src/config.rs
@@ -1,5 +1,10 @@
 use serde::{Deserialize, Serialize};
 
+#[derive(Debug, Clone, Deserialize, Serialize, Default)]
+pub struct UserConfig {
+    pub kafka: KafkaConsumerConfig,
+}
+
 #[derive(Debug, Clone, Deserialize, Serialize)]
 #[serde(deny_unknown_fields)]
 pub struct KafkaConsumerConfig {
@@ -39,7 +44,7 @@ fn default_session_timeout_ms() -> u32 {
 
 #[derive(Debug, Clone, Deserialize, Serialize)]
 #[serde(deny_unknown_fields)]
-#[serde(tag = "security_protocol")]
+#[serde(tag = "kind")]
 pub enum SecurityConfig {
     #[cfg(feature = "ssl")]
     Ssl(SslConfig),
diff --git a/kafka-producer/src/main.rs b/kafka-producer/src/main.rs
index 4e51fcb..409b35a 100644
--- a/kafka-producer/src/main.rs
+++ b/kafka-producer/src/main.rs
@@ -4,7 +4,7 @@ use anyhow::Context;
 use clap::Parser;
 use tikv_jemalloc_ctl::{epoch, stats};
 
-use crate::config::KafkaConsumerConfig;
+use crate::config::UserConfig;
 use crate::subscriber::KafkaProducer;
 
 mod config;
@@ -19,7 +19,7 @@ struct ExplorerArgs {
     node: tycho_light_node::CmdRun,
 }
 
-type Config = tycho_light_node::NodeConfig<KafkaConsumerConfig>;
+type Config = tycho_light_node::NodeConfig<UserConfig>;
 
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
@@ -37,7 +37,7 @@ async fn main() -> anyhow::Result<()> {
 
     let config: Config =
         tycho_light_node::NodeConfig::from_file(args.node.config.as_ref().context("no config")?)?;
-    let writer = KafkaProducer::new(config.user_config.clone())?;
+    let writer = KafkaProducer::new(config.user_config.kafka.clone())?;
 
     if let Some(metrics) = &config.metrics {
         init_metrics(metrics.listen_addr)?;