export declare class BunqKey {
    constructor(privateKeyPem: string);
    static createNew(): BunqKey;
    static createFromPrivateKeyFile(pemFilename: string): BunqKey;
    toPublicKeyString(): string;
    toPrivateKeyString(): string;
    signApiCall(options: any): any;
    verifySigWithPubkey(options: any): boolean;
    createStringToSign(options: any): string;
    private static orderKeys(obj);
    readonly key: any;
}