export interface PKCE {
    code_verifier: string;
    code_challenge: string;
    code_challenge_method: string;
}
export declare type PKCEPublicPart = Omit<PKCE, 'code_verifier'>;
interface PartialCrypto {
    getRandomValues<T extends Uint8Array>(t: T): T;
    subtle: {
        digest(algorithm: AlgorithmIdentifier, data: BufferSource): Promise<ArrayBuffer>;
    };
}
export declare function generatePlatform(crypto: PartialCrypto): Promise<PKCE>;
export declare function generate(): Promise<PKCE>;
export {};