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

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

@@ -0,0 +1,22 @@
+// Copyright 2017-2025 @pezkuwi/api-derive authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { DeriveApi } from '../types.js';
+
+import { createBlockNumberDerive } from './util.js';
+
+/**
+ * @name bestNumberFinalized
+ * @returns A BlockNumber
+ * @description Get the latest finalized block number.
+ * @example
+ * ```javascript
+ * api.derive.chain.bestNumberFinalized((blockNumber) => {
+ *   console.log(`the current finalized block is #${blockNumber}`);
+ * });
+ * ```
+ */
+export const bestNumberFinalized = /*#__PURE__*/ createBlockNumberDerive(
+  (api: DeriveApi) =>
+    api.rpc.chain.subscribeFinalizedHeads()
+);