import type { ChainComposableOptions } from "../types.js";
import { type MaybeRefOrGetter } from "vue";
/**
 * Composable for fetching information about the latest block.
 *
 * @param tag - Which block to target
 * @param options - Additional options
 * @returns The latest finalized or best block
 */
export declare function useBlock(tag?: MaybeRefOrGetter<"best" | "finalized">, options?: ChainComposableOptions): import("../types.js").PromiseLikeAsyncState<import("polkadot-api").BlockInfo>;
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