import { RelationKey, Type } from '../interfaces';
export declare type Schema = {
    [t in Type]: EntitySchema;
};
export declare type EntitySchema = {
    [k in RelationKey]: RelationSchema;
};
export declare type RelationSchema = {
    has: 'many' | 'one';
    type: Type;
    reciprocalKey?: RelationKey;
    alias?: string;
};
export declare class InvalidSchema extends Error {
}
export declare const validateSchema: (schema: Schema) => void;
export declare class ReciprocalKeyValidator {
    type: Type;
    lookup: {
        [relatedType in Type]: {
            [fk in RelationKey]: RelationKey | undefined;
        };
    };
    constructor(type: Type);
    addRelationKey(relatedType: Type, fk: RelationKey, reciprocalKey?: RelationKey): void;
    validate(modelSchema: Schema): void;
}