import type { AwsCredentialIdentityProvider } from "@aws-sdk/types";
import type { Decoder, Encoder, EventStreamPayloadHandler as IEventStreamPayloadHandler, FinalizeHandler, FinalizeHandlerArguments, FinalizeHandlerOutput, HandlerExecutionContext, MessageSigner, MetadataBearer, Provider } from "@smithy/types";
/**
 * @internal
 */
export interface EventStreamPayloadHandlerOptions {
    messageSigner: Provider<MessageSigner>;
    utf8Encoder: Encoder;
    utf8Decoder: Decoder;
    systemClockOffset?: number;
    credentials?: AwsCredentialIdentityProvider;
}
/**
 * @internal
 */
export declare class EventStreamPayloadHandler implements IEventStreamPayloadHandler {
    private readonly messageSigner;
    private readonly eventStreamCodec;
    private readonly systemClockOffsetProvider;
    private readonly credentials?;
    constructor(options: EventStreamPayloadHandlerOptions);
    handle<T extends MetadataBearer>(next: FinalizeHandler<any, T>, args: FinalizeHandlerArguments<any>, context?: HandlerExecutionContext): Promise<FinalizeHandlerOutput<T>>;
}