import * as pgp from 'openpgp';
import { Key } from 'openpgp';
import { BitGoBase } from '../bitgoBase';
/**
 * Fetches BitGo's pubic gpg key used in MPC flows
 * @param {BitGo} bitgo BitGo object
 * @return {Key} public gpg key
 */
export declare function getBitgoGpgPubKey(bitgo: BitGoBase): Promise<Key>;
/**
 * Verify an Eddsa KeyShare Proof.
 *
 * @param senderPubKey public key of the sender of the privateShareProof
 * @param privateShareProof u value proof
 * @param uValue u value from an Eddsa keyshare
 * @return {boolean} whether uValue proof actually was signed by sender as part of their subkeys
 */
export declare function verifyEdShareProof(senderPubKey: string, privateShareProof: string, uValue: string): Promise<boolean>;
/**
 * Verify a shared data proof.
 *
 * @param senderPubKeyArm public key of the signer of the key with proof data
 * @param keyWithNotation signed reciever key with notation data
 * @param dataToVerify data to be checked against notation data in the signed key
 * @return {boolean} whether proof is valid
 */
export declare function verifySharedDataProof(senderPubKeyArm: string, keyWithNotation: string, dataToVerify: {
    name: string;
    value: string;
}[]): Promise<boolean>;
/**
 * Creates a proof through adding notation data to a GPG ceritifying signature.
 *
 * @param privateKeyArmored gpg private key in armor format of the sender
 * @param publicKeyToCertArmored gpg public key in armor fomrat of the reciever
 * @param notations data to be proofed
 * @return {string} keyshare proof
 */
export declare function createSharedDataProof(privateKeyArmored: string, publicKeyToCertArmored: string, notations: {
    name: string;
    value: string;
}[]): Promise<string>;
/**
 * Creates an Eddsa KeyShare Proof by appending an ed25519 subkey to an armored gpg private key.
 *
 * @param privateArmor gpg private key in armor format
 * @param uValue u value from an Eddsa keyshare
 * @return {string} keyshare proof
 */
export declare function createShareProof(privateArmor: string, uValue: string): Promise<string>;
/**
 * Encrypts string using gpg key
 * @DEPRECATED - should use encryptAndSignText instead for added security
 *
 * @param text string to encrypt
 * @param key encryption key
 * @return {string} encrypted string
 *
 * TODO(BG-47170): Delete once gpg signatures are fully supported
 */
export declare function encryptText(text: string, key: Key): Promise<string>;
/**
 * Encrypts and signs a string
 * @param text string to encrypt and sign
 * @param publicArmor public key to encrypt with
 * @param privateArmor private key to sign with
 */
export declare function encryptAndSignText(text: string, publicArmor: string, privateArmor: string): Promise<string>;
/**
 * Reads a signed and encrypted message
 *
 * @param signed signed and encrypted message
 * @param publicArmor public key to verify signature
 * @param privateArmor private key to decrypt message
 */
export declare function readSignedMessage(signed: string, publicArmor: string, privateArmor: string): Promise<string>;
/**
 * Generates a signature
 *
 * @param text string to generate a signature for
 * @param privateArmor private key as armored string
 * @return {string} armored signature string
 */
export declare function signText(text: string, privateArmor: string): Promise<string>;
/**
 * Verifies signature was generated by the public key and matches the expected text
 *
 * @param text text that the signature was for
 * @param armoredSignature signed message as an armored string
 * @param publicArmor public key that generated the signature
 */
export declare function verifySignature(text: string, armoredSignature: string, publicArmor: string): Promise<boolean>;
/**
 * Generate a GPG key pair
 *
 * @param: keyCurve the curve to create a key with
 * @param: username name of the user (optional)
 * @param: email email of the user (optional)
 */
export declare function generateGPGKeyPair(keyCurve: pgp.EllipticCurveName, username?: string | undefined, email?: string | undefined): Promise<pgp.SerializedKeyPair<string>>;
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