Rebrand: polkadot → pezkuwi, substrate → bizinikiwi, kusama → dicle

packages/api-derive/src/chain/subscribeNewBlocks.ts

@@ -0,0 +1,30 @@
+// Copyright 2017-2025 @pezkuwi/api-derive authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { Observable } from 'rxjs';
+import type { SignedBlockExtended } from '../type/types.js';
+import type { DeriveApi } from '../types.js';
+
+import { switchMap } from 'rxjs';
+
+import { memo } from '../util/index.js';
+
+/**
+ * @name subscribeNewBlocks
+ * @returns The latest block & events for that block
+ * @example
+ * ```javascript
+ * const unsub = await api.derive.chain.subscribeNewBlocks((newBlock) => {
+ *   console.log(`Block Hash: ${newBlock.hash}`);
+ * });
+ * ```
+ */
+export function subscribeNewBlocks (instanceId: string, api: DeriveApi): () => Observable<SignedBlockExtended> {
+  return memo(instanceId, (): Observable<SignedBlockExtended> =>
+    api.derive.chain.subscribeNewHeads().pipe(
+      switchMap((header) =>
+        api.derive.chain.getBlock(header.createdAtHash || header.hash)
+      )
+    )
+  );
+}