chore: merge blocksuite source code (#9213)

blocksuite/framework/sync/src/doc/source.ts

@@ -0,0 +1,28 @@
+export interface DocSource {
+  /**
+   * for debug
+   */
+  name: string;
+
+  pull(
+    docId: string,
+    state: Uint8Array
+  ):
+    | Promise<{ data: Uint8Array; state?: Uint8Array } | null>
+    | { data: Uint8Array; state?: Uint8Array }
+    | null;
+  push(docId: string, data: Uint8Array): Promise<void> | void;
+
+  /**
+   * Subscribe to updates from peer
+   *
+   * @param cb callback to handle updates
+   * @param disconnect callback to handle disconnect, reason can be something like 'network-error'
+   *
+   * @returns unsubscribe function
+   */
+  subscribe(
+    cb: (docId: string, data: Uint8Array) => void,
+    disconnect: (reason: string) => void
+  ): Promise<() => void> | (() => void);
+}