import { LdKeyPairInstance } from '@transmute/ld-key-pair';
import { JsonWebKey2020, X25519KeyAgreementKey2019 } from './types';
export declare class X25519KeyPair implements LdKeyPairInstance {
    id: string;
    type: string;
    controller: string;
    publicKey: Uint8Array;
    privateKey?: Uint8Array;
    static fingerprintFromPublicKey(importableType: JsonWebKey2020): Promise<string>;
    static generate: ({ secureRandom, }: {
        secureRandom: () => Uint8Array;
    }) => Promise<X25519KeyPair>;
    static from: (k: JsonWebKey2020 | X25519KeyAgreementKey2019) => Promise<X25519KeyPair>;
    static fromFingerprint({ fingerprint }: {
        fingerprint: string;
    }): Promise<X25519KeyPair>;
    constructor(opts: {
        id: string;
        type: string;
        controller: string;
        publicKey: Uint8Array;
        privateKey?: Uint8Array;
    });
    fingerprint(): Promise<string>;
    export(options?: {
        privateKey?: boolean;
        type: 'JsonWebKey2020' | 'X25519KeyAgreementKey2019';
    }): Promise<JsonWebKey2020 | X25519KeyAgreementKey2019>;
    deriveSecret({ publicKey, }: {
        publicKey: JsonWebKey2020 | X25519KeyAgreementKey2019;
    }): Promise<Uint8Array>;
}