export type CloudAppFetch = (input: string, init?: {
    method?: string;
    headers?: Record<string, string>;
    body?: string;
}) => Promise<Response>;
export interface CloudAppTokenExchangeParams {
    appRegistrationId: string;
    appSecret: string;
    coreApiUrl: string;
    fetch?: CloudAppFetch;
}
export interface CloudAppToken {
    token: string;
    expiresAt: string;
    expiresAtMs: number;
}
export declare class CloudAppTokenExchangeError extends Error {
    readonly status?: number;
    constructor(message: string, status?: number);
}
export declare const exchangeCloudAppToken: (params: CloudAppTokenExchangeParams) => Promise<CloudAppToken>;
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