packages/api-derive/src/chain/bestNumberFinalized.ts
// Copyright 2017-2024 @polkadot/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
* <BR>
*
* ```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()
);