import { FieldPath } from './field-path.js';
import type { WhereOp } from './rest/query-encoding.js';
export type FilterNode = {
    kind: 'field';
    fieldPath: string;
    op: WhereOp;
    value: unknown;
} | {
    kind: 'composite';
    op: 'AND' | 'OR';
    filters: FilterNode[];
};
export declare class Filter {
    private readonly node;
    private constructor();
    static where(fieldPath: string | FieldPath, op: WhereOp, value: unknown): Filter;
    static or(...filters: Filter[]): Filter;
    static and(...filters: Filter[]): Filter;
    _toFilterNode(): FilterNode;
}
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