import type { TargetAdapterError } from './errors.js';
export interface TargetAccessTokenProvider {
    getAccessToken(signal?: AbortSignal): Promise<string>;
}
export type CapsuleState = 'provisioning' | 'ready' | 'terminating' | 'terminated' | 'failed';
export declare const KNOWN_CAPSULE_STATES: readonly ["provisioning", "ready", "terminating", "terminated", "failed"];
export interface Capsule {
    readonly id: string;
    readonly state: CapsuleState;
    readonly label: string | null;
    readonly createdAt: string;
}
export interface CapsuleAccess {
    readonly protocol: 'openengine.cluster/v1';
    readonly websocketUrl: string;
    readonly accessToken: string;
    readonly tokenType: 'Bearer';
    readonly expiresAt: string;
}
export interface CapsuleListPage {
    readonly capsules: readonly Capsule[];
    readonly nextCursor: string | null;
}
export interface CapsuleLimits {
    readonly activeCapsules: number;
    readonly maxActiveCapsules: number | null;
}
export interface AllocateRequest {
    readonly idempotencyKey: string;
    readonly label?: string;
    readonly size?: 'tiny' | 'small' | 'standard' | 'large';
}
export interface ListRequest {
    readonly cursor?: string;
    readonly limit?: number;
}
export interface HttpTransport {
    fetch(url: string, init: RequestInit & {
        redirect: 'manual';
    }): Promise<Response>;
}
export interface Clock {
    now(): number;
}
export interface RetryPolicy {
    shouldRetry(attempt: number, elapsed: number, error: TargetAdapterError): {
        retry: boolean;
        delayMs: number;
    };
}