/**
 * Function type that extracts a partition key from data.
 * @template D The data type to process
 */
export type PartitionHandler<D> = (data: D) => string | Promise<string>;
/**
 * Handler options that extend fetch configuration with optional partitioning support.
 * @template F The fetch configuration type (e.g., EthFetchConfig, MoveFetchConfig)
 * @template D The data type that will be processed (e.g., Event, Transaction, Block)
 */
export type HandlerOptions<F, D> = Partial<F> & {
    /**
     * Optional partition key for data partitioning.
     * Can be a static string or a function that computes the key from the data.
     */
    partitionKey?: string | PartitionHandler<D>;
    /**
     * Optional whether to skip decoding
     * By default the processor will do decoding (e.g. replace string number to bigint, byte array to base64, etc),
     * however in some case you might skip the decoding (meaning no data_decoded field) and only access the raw data field
     */
    skipDecoding?: boolean;
};
/**
 * Merge two handler options, with the second options taking precedence over the first.
 * @param options1 First handler options
 * @param options2 Second handler options (takes precedence)
 * @returns Merged handler options
 */
export declare function mergeHandlerOptions<F, D>(options1?: HandlerOptions<F, D>, options2?: HandlerOptions<F, D>): HandlerOptions<F, D> | undefined;
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