import { IDIDDocument } from '@ew-did-registry/did-resolver-interface';
export declare class ProofVerifier {
    private _jwt;
    private _didDocument;
    constructor(didDocument: IDIDDocument);
    /**
     * @description checks that token was issued by identity represented by
     * this verifier or his authentication delegate
     *
     * @param token
     *
     * @returns: DID of authenticated identity on successful verification or null otherwise
     */
    verifyAuthenticationProof(token: string): Promise<string | null>;
    /**
     * @description Checks that token is issued by identity verification delegate
     *
     * @param token: JWT token to verify
     * @returns: DID of the authenticated identity on successful verification or null otherwise
     */
    verifyAssertionProof(token: string): Promise<string | null>;
    /**
     * @description Determines if a token was signed with an Ethereum signature
     * by the address referenced by the id of the DID Document
     * Note that JWT-compliant signatures can't be used to recover an ethereum
     */
    private isIdentity;
    private isAuthenticationDelegate;
    private isVerificationDelegate;
    private verifySignature;
    private authenticationKeys;
    private verificationKeys;
    private areLinked;
    private isSigAuth;
    private isVeriKey;
}