import { BlockHash, BlockNumber, Header, Option, SignedBlock } from '@dedot/codecs';
import { Callback, GenericJsonRpcApis, Unsub } from '@dedot/types';
export interface ChainJsonRpcApis extends GenericJsonRpcApis {
    /**
     * Get header and body of a relay chain block
     *
     * @rpcname chain_getBlock
     * @param {BlockHash} at
     **/
    chain_getBlock: (at?: BlockHash) => Promise<Option<SignedBlock>>;
    /**
     * Get the block hash for a specific block
     *
     * @rpcname chain_getBlockHash
     * @param {BlockNumber} blockNumber
     **/
    chain_getBlockHash: (blockNumber?: BlockNumber) => Promise<Option<BlockHash>>;
    /**
     * Get hash of the last finalized block in the canon chain
     *
     * @rpcname chain_getFinalizedHead
     **/
    chain_getFinalizedHead: () => Promise<BlockHash>;
    /**
     * Retrieves the header for a specific block
     *
     * @rpcname chain_getHeader
     * @param {BlockHash} at
     **/
    chain_getHeader: (at?: BlockHash) => Promise<Option<Header>>;
    /**
     * All head subscription.
     *
     * @subscription chain_allHead, chain_subscribeAllHeads, chain_unsubscribeAllHeads
     **/
    chain_subscribeAllHeads: (callback: Callback<Header>) => Promise<Unsub>;
    /**
     * Retrieves the best finalized header via subscription
     *
     * @subscription chain_finalizedHead, chain_subscribeFinalizedHeads, chain_unsubscribeFinalizedHeads
     **/
    chain_subscribeFinalizedHeads: (callback: Callback<Header>) => Promise<Unsub>;
    /**
     * Retrieves the best header via subscription
     *
     * @subscription chain_newHead, chain_subscribeNewHeads, chain_unsubscribeNewHeads
     **/
    chain_subscribeNewHeads: (callback: Callback<Header>) => Promise<Unsub>;
}