import { StatelessGraphNode, StatelessNodeDefinition, StatelessNodeType } from '../../../types/graph';
export interface LogMiddlewareNode extends StatelessGraphNode<'log-middleware', LogMiddlewareNodeProperties> {
}
export interface LogMiddlewareNodeDefinition extends StatelessNodeDefinition<'log-middleware', LogMiddlewareNodeProperties> {
}
export declare type LogSink = (...args: Array<any>) => void;
export interface LogMiddlewareNodeProperties {
    logRequests: boolean;
    logResponses: boolean;
    sink: LogSink;
}
export declare const LogMiddlewareNodeType: StatelessNodeType<'log-middleware', LogMiddlewareNodeProperties>;
export interface LogMiddlewareOptions {
    logRequests?: boolean;
    logResponses?: boolean;
    sink?: LogSink;
}
export declare function logMiddleware(options?: LogMiddlewareOptions): LogMiddlewareNodeDefinition;