83 lines
2.2 KiB
TypeScript
83 lines
2.2 KiB
TypeScript
'use strict';
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export function defineReadOnly(object: any, name: string, value: any): void {
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Object.defineProperty(object, name, {
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enumerable: true,
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value: value,
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writable: false,
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});
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}
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export function defineFrozen(object: any, name: string, value: any): void {
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var frozen = JSON.stringify(value);
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Object.defineProperty(object, name, {
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enumerable: true,
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get: function() { return JSON.parse(frozen); }
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});
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}
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// There are some issues with instanceof with npm link, so we use this
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// to ensure types are what we expect.
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export function setType(object: any, type: string): void {
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Object.defineProperty(object, '_ethersType', { configurable: false, value: type, writable: false });
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}
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export function isType(object: any, type: string): boolean {
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return (object._ethersType === type);
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}
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export function resolveProperties(object: any): Promise<any> {
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let result: any = {};
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let promises: Array<Promise<void>> = [];
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Object.keys(object).forEach((key) => {
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let value = object[key];
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if (value instanceof Promise) {
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promises.push(
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value.then((value) => {
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result[key] = value;
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return null;
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})
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);
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} else {
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result[key] = value;
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}
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});
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return Promise.all(promises).then(() => {
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return result;
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});
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}
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export function shallowCopy(object: any): any {
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let result: any = {};
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for (var key in object) { result[key] = object[key]; }
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return result;
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}
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export function jsonCopy(object: any): any {
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return JSON.parse(JSON.stringify(object));
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}
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// See: https://github.com/isaacs/inherits/blob/master/inherits_browser.js
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function inherits(ctor: any, superCtor: any): void {
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ctor.super_ = superCtor
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ctor.prototype = Object.create(superCtor.prototype, {
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constructor: {
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value: ctor,
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enumerable: false,
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writable: true,
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configurable: true
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}
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});
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}
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export function inheritable(parent: any): (child: any) => void {
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return function(child: any): void {
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inherits(child, parent);
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defineReadOnly(child, 'inherits', inheritable(child));
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}
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}
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