export interface timestamp {
    seconds: number;
    nanoseconds: number;
}
export declare const emptyTimestamp: timestamp;
export interface IWithCreatedShort {
    readonly at: string;
    readonly by: string;
}
export interface IWithCreatedOn {
    readonly createdOn: string;
}
export interface IWithCreated {
    readonly createdAt: timestamp;
    readonly createdBy: string;
}
export interface IWithUpdated {
    readonly updatedAt: timestamp;
    readonly updatedBy: string;
}
export interface IWithDeleted {
    readonly deletedAt?: timestamp;
    readonly deletedBy?: string;
}
export interface IWithModified extends IWithCreated, IWithUpdated, IWithDeleted {
}