*Send all items to the peer we bootstrapped from if we have their connection

*Send all items to the peer we connect to in addPeerHandler only if we are already bootstrapped
*Extract item creation into private helpers

src/index.ts

@@ -113,11 +113,7 @@ export default class DHTCache extends EventEmitter {
     this._addEntityConnection(this.id, item);
 
     const broadcast = () => {
-      this._broadcastMessage({
-        type: Type.ADD_ITEM,
-        data: b4a.from(item as string, "hex"),
-        signature: this._signItem(item),
-      });
+      this._broadcastMessage(this._createAddItemRequest(item));
     };
 
     if (!this.bootstrapped) {
@@ -201,6 +197,7 @@ export default class DHTCache extends EventEmitter {
     }
 
     if (this.bootstrapped) {
+      this._sendItemsToPeer(peer);
       return;
     }
 
@@ -316,6 +313,11 @@ export default class DHTCache extends EventEmitter {
     } else if (type === Type.BOOTSTRAP_RESPONSE) {
       const { bootstrap } = decoded;
       this._bootstrapFrom(bootstrap);
+
+      if (this.swarm._allConnections.has(id)) {
+        this._sendItemsToPeer(this.swarm._allConnections.get(id));
+      }
+
       this.log.debug(`Bootstrap response received`);
     } else if (type === Type.HEARTBEAT) {
       const { id: toId, signature, data: bufData } = decoded;
@@ -590,4 +592,26 @@ export default class DHTCache extends EventEmitter {
     this.send(peer, b4a.from("hello"));
     this.swarm.leavePeer(peer.remotePublicKey);
   }
+
+  private _sendItemsToPeer(peer: any) {
+    for (let item of this.cache) {
+      item = this._maybeHexify(item);
+      this.send(peer, this._createAddItemRequestMessage(item));
+    }
+  }
+
+  private _createAddItemRequestMessage(item: string | Buffer): Uint8Array {
+    item = this._maybeHexify(item);
+    return Message.toBinary(Message.create(this._createAddItemRequest(item)));
+  }
+
+  private _createAddItemRequest(
+    item: string | Buffer
+  ): PartialMessage<Message> {
+    return {
+      type: Type.ADD_ITEM,
+      data: b4a.from(item as string, "hex"),
+      signature: this._signItem(item),
+    };
+  }
 }