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event.ts
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event.ts
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/*
* Copyright 漏 2019 Lisk Foundation
*
* See the LICENSE file at the top-level directory of this distribution
* for licensing information.
*
* Unless otherwise agreed in a custom licensing agreement with the Lisk Foundation,
* no part of this software, including this file, may be copied, modified,
* propagated, or distributed except according to the terms contained in the
* LICENSE file.
*
* Removal or modification of this copyright notice is prohibited.
*/
import { strict as assert } from 'assert';
import { eventWithModuleNameReg } from '../constants';
import { getEndpointPath } from '../endpoint';
import { NotificationRequest, VERSION } from './jsonrpc';
export type EventCallback = (data?: Record<string, unknown>) => void | Promise<void>;
export type EventsDefinition = ReadonlyArray<string>;
export class Event {
public readonly module: string;
public readonly name: string;
public readonly data?: Record<string, unknown>;
public constructor(name: string, data?: Record<string, unknown>) {
assert(
eventWithModuleNameReg.test(name),
`Event name "${name}" must be a valid name with module name and event name.`,
);
const [moduleName, ...eventName] = name.split('_');
this.module = moduleName;
this.name = eventName.join('_');
this.data = data;
}
public static fromJSONRPCNotification(data: NotificationRequest | string): Event {
const { method, params } =
typeof data === 'string' ? (JSON.parse(data) as NotificationRequest) : data;
return new Event(method, params);
}
public toJSONRPCNotification(): NotificationRequest {
return {
jsonrpc: VERSION,
method: getEndpointPath(this.module, this.name),
params: this.data,
};
}
public key(): string {
return getEndpointPath(this.module, this.name);
}
}