62 lines
2.8 KiB
JavaScript
62 lines
2.8 KiB
JavaScript
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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import { utils as didUtils } from '@web5/dids';
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/**
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* Dynamically selects up to 2 DWN endpoints that are provided
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* by default during the Tech Preview period.
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*
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* @beta
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*/
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export function getTechPreviewDwnEndpoints() {
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return __awaiter(this, void 0, void 0, function* () {
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let response;
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try {
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response = yield fetch('https://dwn.tbddev.org/.well-known/did.json');
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if (!response.ok) {
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throw new Error(`HTTP Error: ${response.status} ${response.statusText}`);
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}
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}
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catch (error) {
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console.warn('failed to get tech preview dwn endpoints:', error.message);
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return [];
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}
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const didDocument = yield response.json();
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const [dwnService] = didUtils.getServices({ didDocument, id: '#dwn', type: 'DecentralizedWebNode' });
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// allocate up to 2 nodes for a user.
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const techPreviewEndpoints = new Set();
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if ('serviceEndpoint' in dwnService
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&& !Array.isArray(dwnService.serviceEndpoint)
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&& typeof dwnService.serviceEndpoint !== 'string'
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&& Array.isArray(dwnService.serviceEndpoint.nodes)) {
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const dwnUrls = dwnService.serviceEndpoint.nodes;
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const numNodesToAllocate = Math.min(dwnUrls.length, 2);
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for (let attempts = 0; attempts < dwnUrls.length && techPreviewEndpoints.size < numNodesToAllocate; attempts += 1) {
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const nodeIdx = getRandomInt(0, dwnUrls.length);
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const dwnUrl = dwnUrls[nodeIdx];
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try {
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const healthCheck = yield fetch(`${dwnUrl}/health`);
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if (healthCheck.ok) {
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techPreviewEndpoints.add(dwnUrl);
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}
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}
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catch (error) {
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// Ignore healthcheck failures and try the next node.
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}
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}
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}
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return Array.from(techPreviewEndpoints);
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});
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}
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function getRandomInt(min, max) {
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min = Math.ceil(min);
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max = Math.floor(max);
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return Math.floor(Math.random() * (max - min)) + min;
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}
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//# sourceMappingURL=tech-preview.js.map
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