@lodestar/beacon-node/lib/util/strictEvents.d.ts

A Typescript implementation of the beacon chain

/**
 * Simplified version of `strict-event-emitter-types` where each event only emits one argument
 */
export type StrictEventEmitterSingleArg<EventData> = {
    on<K extends keyof EventData>(event: K, listener: (data: EventData[K]) => void): void;
    off<K extends keyof EventData>(event: K, listener: (data: EventData[K]) => void): void;
    emit<K extends keyof EventData>(event: K, data: EventData[K]): void;
};
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