import * as functions from 'firebase-functions';
/**
 * Runs the counter function
 * @param change - change ref
 * @param context - event context
 */
export declare function colCounter(change: functions.Change<functions.firestore.DocumentSnapshot>, context: functions.EventContext, countersCol?: string): Promise<any>;
/**
 * Adds a query counter to a doc
 * @param change - change ref
 * @param context - event context
 * @param queryRef - the query ref to count
 * @param countRef - the counter document ref
 * @param countName - the name of the counter on the counter document
 * @param del - boolean whether or not to delete the document
 * @param n - (1,-1)  1 for create, -1 for delete
 * @param check - whether or not to check for create or delete doc
 */
export declare function queryCounter(change: functions.Change<functions.firestore.DocumentSnapshot>, context: functions.EventContext, queryRef: FirebaseFirestore.Query, countRef: FirebaseFirestore.DocumentReference, countName?: string, del?: number, n?: number, check?: boolean): Promise<any>;
/**
 * Adds a condition counter to a doc
 * @param change - change ref
 * @param context - event context
 * @param field - where field path
 * @param operator - where operator
 * @param value - where value
 * @param countName - counter field name, default ${field}Count
 * @param countersCol - counter collection name, default _counters
 * @param del - boolean, delete counter document ?
 * @returns
 */
export declare function conditionCounter(change: functions.Change<functions.firestore.DocumentSnapshot>, context: functions.EventContext, field: string | FirebaseFirestore.FieldPath, operator: FirebaseFirestore.WhereFilterOp, value: any, countName?: string, countersCol?: string, del?: boolean): Promise<any>;