/// <reference types="node" />
import { AccountInfo } from './accounts';
import Stats from '../services/stats';
export interface MiddlewareDefinition {
    type: string;
    options?: object;
}
export interface MiddlewareServices {
    stats: Stats;
    getInfo(accountId: string): AccountInfo;
    getOwnAddress(): string;
    sendData(data: Buffer, accountId: string): Promise<Buffer>;
    sendMoney(amount: string, accountId: string): Promise<void>;
}
export interface MiddlewareCallback<T, U> {
    (val: T): Promise<U>;
}
export interface MiddlewareMethod<T, U> {
    (val: T, next: MiddlewareCallback<T, U>): Promise<U>;
}
export interface MiddlewareMethods {
    data: MiddlewareMethod<Buffer, Buffer>;
    money: MiddlewareMethod<string, void>;
}
export interface PipelineEntry<T, U> {
    name: string;
    method: MiddlewareMethod<T, U>;
}
export interface Pipeline<T, U> {
    insertFirst(entry: PipelineEntry<T, U>): void;
    insertLast(entry: PipelineEntry<T, U>): void;
    insertBefore(middlewareName: string, entry: PipelineEntry<T, U>): void;
    insertAfter(middlewareName: string, entry: PipelineEntry<T, U>): void;
    getMethods(): MiddlewareMethod<T, U>[];
}
export interface Pipelines {
    readonly startup: Pipeline<void, void>;
    readonly teardown: Pipeline<void, void>;
    readonly incomingData: Pipeline<Buffer, Buffer>;
    readonly incomingMoney: Pipeline<string, void>;
    readonly outgoingData: Pipeline<Buffer, Buffer>;
    readonly outgoingMoney: Pipeline<string, void>;
}
export interface Middleware {
    applyToPipelines: (pipelines: Pipelines, accountId: string) => Promise<void>;
}
export interface MiddlewareConstructor {
    new (options: object, api: MiddlewareServices): Middleware;
}