import { BlockNumber, EventLog } from "@celo/connect";
import { EventEmitter } from "events";
export interface EventOptions {
    filter?: object;
    fromBlock?: BlockNumber;
    topics?: string[];
}
export interface ContractEventLog<T> extends EventLog {
    returnValues: T;
}
export interface ContractEventEmitter<T> extends EventEmitter {
    on(event: "connected", listener: (subscriptionId: string) => void): this;
    on(event: "data" | "changed", listener: (event: ContractEventLog<T>) => void): this;
    on(event: "error", listener: (error: Error) => void): this;
}
export type Callback<T> = (error: Error | null, result?: T) => void;
export type ContractEvent<T> = (options?: EventOptions, cb?: Callback<ContractEventLog<T>>) => ContractEventEmitter<T>;