declare type PromptUsage = {
    title: string;
    message: string;
    positiveActionText: string;
    negativeActionText: string;
};
declare type Validate = {
    promptUsage: true;
    checkPromptAsked?: boolean;
    title: string;
    message: string;
    cancelButtonText: string;
    promptOpts: PromptUsage;
} | {
    promptUsage: false;
    checkPromptAsked?: boolean;
    title: string;
    message: string;
    cancelButtonText: string;
};
declare class Biometrics {
    private __biometricEnabled;
    private __biometricPromptAsked;
    private __isBiometricValidationActive;
    constructor();
    get hasSupport(): boolean;
    get enabled(): boolean;
    set enabled(value: boolean);
    get promptAsked(): boolean;
    set promptAsked(value: boolean);
    private promptUsage;
    validate(opts: Validate, showAlert?: boolean): Promise<boolean>;
}
export default Biometrics;