import { Observable } from "tns-core-modules/data/observable/observable";
export interface NSPaystackSuccessResponse {
    reference: string;
}
export interface NSPaystackErrorResponse extends Partial<NSPaystackSuccessResponse> {
    code: number | string;
    message: string;
}
export declare type NSPaystackResponse = NSPaystackSuccessResponse | NSPaystackErrorResponse;
export interface NSPaymentParams {
    amount: number;
    email: string;
    number: string;
    cvc: string;
    year: number;
    month: number;
}
export declare abstract class Payment extends Observable {
    static openDialogEvent: string;
    static closeDialogEvent: string;
    protected abstract initialize(params: NSPaymentParams): any;
    abstract addCustomField(name: string, value: string): this;
    abstract addMetadata(name: string, value: string): this;
    abstract charge(): Promise<NSPaystackResponse>;
    constructor(params: NSPaymentParams);
}
export declare abstract class Common {
    constructor();
    abstract getPublicKey(): string;
    abstract initialize(publicKey: string): this;
    abstract setPublicKey(key: string): this;
    abstract payment(params: NSPaymentParams): Payment;
}