/**
 * Checks if the ES256k signature on passed `token` match the claimed public key
 * in the payload key `public_keys`.
 *
 * @param  {String} token encoded and signed authentication token
 * @return {Boolean} Returns `true` if the signature matches the claimed public key
 * @throws {Error} if `token` contains multiple public keys
 * @private
 */
export declare function doSignaturesMatchPublicKeys(token: string): boolean;
/**
 * Makes sure that the identity address portion of
 * the decentralized identifier passed in the issuer `iss`
 * key of the token matches the public key
 *
 * @param  {String} token encoded and signed authentication token
 * @return {Boolean} if the identity address and public keys match
 * @throws {Error} if ` token` has multiple public keys
 * @private
 */
export declare function doPublicKeysMatchIssuer(token: string): boolean;
/**
 * Looks up the identity address that owns the claimed username
 * in `token` using the lookup endpoint provided in `nameLookupURL`
 * to determine if the username is owned by the identity address
 * that matches the claimed public key
 *
 * @param  {String} token  encoded and signed authentication token
 * @param  {String} nameLookupURL a URL to the name lookup endpoint of the Blockstack Core API
 * @return {Promise<Boolean>} returns a `Promise` that resolves to
 * `true` if the username is owned by the public key, otherwise the
 * `Promise` resolves to `false`
 * @private
 */
export declare function doPublicKeysMatchUsername(token: string, nameLookupURL: string): Promise<boolean>;
/**
 * Checks if the if the token issuance time and date is after the
 * current time and date.
 *
 * @param  {String}  token encoded and signed authentication token
 * @return {Boolean} `true` if the token was issued after the current time,
 * otherwise returns `false`
 * @private
 */
export declare function isIssuanceDateValid(token: string): boolean;
/**
 * Checks if the expiration date of the `token` is before the current time
 * @param  {String}  token encoded and signed authentication token
 * @return {Boolean} `true` if the `token` has not yet expired, `false`
 * if the `token` has expired
 *
 * @private
 */
export declare function isExpirationDateValid(token: string): boolean;
/**
 * Makes sure the `manifest_uri` is a same origin absolute URL.
 * @param  {String}  token encoded and signed authentication token
 * @return {Boolean} `true` if valid, otherwise `false`
 * @private
 */
export declare function isManifestUriValid(token: string): boolean;
/**
 * Makes sure the `redirect_uri` is a same origin absolute URL.
 * @param  {String}  token encoded and signed authentication token
 * @return {Boolean} `true` if valid, otherwise `false`
 * @private
 */
export declare function isRedirectUriValid(token: string): boolean;
/**
 * Verify authentication request is valid. This function performs a number
 * of checks on the authentication request token:
 * * Checks that `token` has a valid issuance date & is not expired
 * * Checks that `token` has a valid signature that matches the public key it claims
 * * Checks that both the manifest and redirect URLs are absolute and conform to
 * the same origin policy
 *
 * @param  {String} token encoded and signed authentication request token
 * @return {Promise} that resolves to true if the auth request
 *  is valid and false if it does not. It rejects with a String if the
 *  token is not signed
 *  @private
 */
export declare function verifyAuthRequest(token: string): Promise<boolean>;
/**
 * Verify the authentication request is valid and
 * fetch the app manifest file if valid. Otherwise, reject the promise.
 * @param  {String} token encoded and signed authentication request token
 * @return {Promise} that resolves to the app manifest file in JSON format
 * or rejects if the auth request or app manifest file is invalid
 * @private
 */
export declare function verifyAuthRequestAndLoadManifest(token: string): Promise<any>;
/**
 * Verify the authentication response is valid
 * @param {String} token the authentication response token
 * @param {String} nameLookupURL the url use to verify owner of a username
 * @return {Promise} that resolves to true if auth response
 * is valid and false if it does not
 * @private
 */
export declare function verifyAuthResponse(token: string, nameLookupURL: string): Promise<boolean>;