@dwn-protocol/id-sdk
Version:
SDK for accessing the features and capabilities
85 lines • 3.41 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getServiceDwnEndpoints = void 0;
const didUtils = __importStar(require("./dids/utils.js"));
/**
* Dynamically selects DWN endpoints
*/
async function getServiceDwnEndpoints() {
let response;
try {
response = await fetch('https://s3.amazonaws.com/dwn.id/.well-known/dwn.json', {
method: 'GET',
mode: 'cors',
cache: 'no-cache',
headers: {
'Accept': '*/*',
'Content-Type': 'application/json',
},
});
// console.log('response', response);
if (!response.ok) {
throw new Error(`HTTP Error: ${response.status} ${response.statusText}`);
}
}
catch (error) {
// console.warn('failed to get dwn endpoints:', error.message);
return [];
}
const didDocument = await response.json();
const [dwnService] = didUtils.getServices({ didDocument, id: '#dwn', type: 'DecentralizedWebNode' });
// allocate nodes for a user.
const dwnEndpoints = new Set();
if ('serviceEndpoint' in dwnService
&& !Array.isArray(dwnService.serviceEndpoint)
&& typeof dwnService.serviceEndpoint !== 'string'
&& Array.isArray(dwnService.serviceEndpoint.nodes)) {
const dwnUrls = dwnService.serviceEndpoint.nodes;
const numNodesToAllocate = Math.min(dwnUrls.length, 3);
for (let attempts = 0; attempts < dwnUrls.length && dwnEndpoints.size <= numNodesToAllocate; attempts += 1) {
// when we have more relayers we can dynamically choose up to 3
// const nodeIdx = getRandomInt(0, dwnUrls.length);
const dwnUrl = dwnUrls[attempts];
try {
const healthCheck = await fetch(`${dwnUrl}/health`);
if (healthCheck.ok) {
dwnEndpoints.add(dwnUrl);
}
}
catch (error) {
// Ignore healthcheck failure and try the next node.
}
}
}
return Array.from(dwnEndpoints);
}
exports.getServiceDwnEndpoints = getServiceDwnEndpoints;
// function getRandomInt(min, max) {
// min = Math.ceil(min);
// max = Math.floor(max);
// return Math.floor(Math.random() * (max - min)) + min;
// }
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