diff --git a/src/collector.rs b/src/collector.rs
new file mode 100644
index 0000000..eff43ef
--- /dev/null
+++ b/src/collector.rs
@@ -0,0 +1,71 @@
+#![allow(unused)]
+use std::{collections::{HashSet, HashMap}, sync::Arc, time::SystemTime};
+
+use chrono::Utc;
+use sea_orm::{DatabaseConnection, EntityTrait, ActiveValue::NotSet, QuerySelect};
+use tokio::sync::{mpsc, RwLock};
+
+use crate::nodeinfo::model::NodeInfoOwned;
+use crate::entities;
+
+#[derive(Debug, Clone)]
+pub struct CollectorHandle {
+	known: Arc<RwLock<HashSet<String>>>,
+	tx: mpsc::UnboundedSender<(String, NodeInfoOwned)>,
+}
+
+impl CollectorHandle {
+	pub async fn new(mut db: DatabaseConnection) -> Self {
+		let (tx, rx) = mpsc::unbounded_channel();
+		let existing_infos : HashSet<String> = entities::node_info::Entity::find()
+			.select_only()
+			.column(entities::node_info::Column::Domain)
+			.all(&db).await.expect("could not stream known domains")
+			.iter()
+			.map(|x| x.domain.clone())
+			.collect();
+
+		let worker = CollectorWorker::new(rx);
+		let known = Arc::new(RwLock::new(existing_infos));
+		tokio::spawn(async move { worker.collect(&mut db).await });
+		CollectorHandle { known, tx }
+	}
+
+	pub async fn already_scanned(&self, domain: &str) -> bool {
+		if self.known.read().await.contains(domain) { return true; }
+		self.known.write().await.insert(domain.to_string());
+		false
+	}
+
+	pub fn add_instance(&self, domain: &str, instance: NodeInfoOwned) {
+		self.tx.send((domain.to_string(), instance))
+			.expect("could not send instance to collector")
+	}
+}
+
+#[derive(Debug)]
+struct CollectorWorker {
+	known_network: HashSet<String>,
+	rx: mpsc::UnboundedReceiver<(String, NodeInfoOwned)>,
+}
+
+impl CollectorWorker {
+	fn new(rx: mpsc::UnboundedReceiver<(String, NodeInfoOwned)>) -> Self {
+		CollectorWorker { known_network: HashSet::new(), rx }
+	}
+
+	async fn collect(mut self, db: &mut DatabaseConnection) {
+		while let Some((domain, info)) = self.rx.recv().await {
+			self.known_network.insert(domain.clone());
+			match entities::node_info::Entity::insert(entities::node_info::ActiveModel {
+				domain: sea_orm::ActiveValue::Set(domain.clone()),
+				data: sea_orm::ActiveValue::Set(serde_json::to_string(&info).expect("could not serialize node info")),
+				updated: sea_orm::ActiveValue::Set(Utc::now())
+			}).exec(db).await {
+				Ok(x) => tracing::debug!("inserted domain {} with id {}", domain, x.last_insert_id),
+				Err(e) => tracing::error!("could not insert info for domain {}: {}", domain, e),
+			}
+		}
+	}
+}
+