export declare type KeyPair = {
    publicKey: string;
    privateKey: string;
};
export default class Tools {
    /**
     * Converts VASP Smart Contract addres to code.
     *
     * @param _address  VASP Smart Contract address to be converted.
     * @returns VASP Code corresponding to the address
     *
     */
    static addressToVaspCode(_address: string): string;
    /**
     * Checks is VAAN is well formed
     *
     * @param _vaan
     */
    static checkVaan(_vaan: string): void;
    /**
     * Gets the VASP Code from the VAAN (first 4 bytes)
     *
     * @param _vaan
     */
    static vaspCodeFromVaan(_vaan: string): string;
    /**
     * Generate public and private key
     *
     */
    static generateKeyPair(): KeyPair;
    /**
     * Get PublicKey from Private Key
     *
     * @param _privKey
     */
    static publicFromPrivateKey(_privKey: string): string;
    /**
     *  Symmetric ECDH key derivation
     *
     * @param _publicKeyA
     * @param _privateKeyB
     */
    static deriveSharedKey(_publicKeyA: string, _privateKeyB: string): string;
    static jsonToHex(_jsonMsg: any): string;
    static hexToJson(_hexStr: string): any;
    static sign(_msgHex: string, _privKey: string): any;
    static signWeb3(_msg: string, _privKey: string): any;
    static randomVASPCode(): string;
}