import { EmailError, type FailurePhase } from '@fluxmail/core';
export interface GraphErrorLike {
    status?: number;
    code?: string;
    message?: string;
    retryAfterMs?: number;
}
export declare class GraphHttpError extends Error implements GraphErrorLike {
    readonly status: number;
    readonly code: string | undefined;
    readonly retryAfterMs?: number | undefined;
    constructor(status: number, code: string | undefined, message: string, retryAfterMs?: number | undefined);
}
export declare function isRetryableGraphError(err: unknown): boolean;
/** Map a Graph or network error to an EmailError. `phase` applies when the error has none yet. */
export declare function toEmailError(err: unknown, phase?: FailurePhase): EmailError;
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