export declare class PrefillUserLoginDetails {
    /**
     * The user's mobile number to pre-fill on the PhonePe payment page.
     * Expected format: 10-digit Indian mobile number (e.g. "9876543210"),
     * or E.164 format with country code (e.g. "+919876543210").
     */
    phoneNumber?: string;
    constructor(phoneNumber?: string);
    static builder(): PrefillUserLoginDetailsBuilder;
}
declare class PrefillUserLoginDetailsBuilder {
    private _phoneNumber?;
    phoneNumber: (phoneNumber: string) => PrefillUserLoginDetailsBuilder;
    build: () => PrefillUserLoginDetails;
}
export {};