@jmcanterafonseca-iota/anchoring-channels
Version:
Powered by IOTA Streams, Anchor Channels is an easy to be used library that allows to anchor messages to the Tangle.
93 lines • 6.5 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const node_1 = require("@iota/identity-wasm/node");
const anchoringChannelError_1 = __importDefault(require("../errors/anchoringChannelError"));
const anchoringChannelErrorNames_1 = __importDefault(require("../errors/anchoringChannelErrorNames"));
const channelHelper_1 = require("../helpers/channelHelper");
class DidService {
/**
* Resolves the DID
* @param node Node against the DID is resolved
* @param did DID to be resolved
* @returns The DID Document resolved from Tangle
*/
static resolve(node, did) {
return __awaiter(this, void 0, void 0, function* () {
try {
const jsonDoc = yield node_1.resolve(did, {
network: "mainnet"
});
const doc = node_1.Document.fromJSON(jsonDoc);
if (!doc.verify()) {
throw new anchoringChannelError_1.default(anchoringChannelErrorNames_1.default.DID_NOT_VERIFIED, "DID cannot be verified");
}
return doc;
}
catch (_a) {
throw new anchoringChannelError_1.default(anchoringChannelErrorNames_1.default.DID_NOT_FOUND, "DID cannot be resolved");
}
});
}
/**
* Resolves the DID verification method
* @param node Node against the DID is resolved
* @param didMethod DID method to be resolved
* @returns The DID Document resolved from Tangle
*/
static resolveMethod(node, didMethod) {
return __awaiter(this, void 0, void 0, function* () {
try {
const didDocument = yield this.resolve(node, didMethod.split("#")[0]);
return didDocument.resolveKey(didMethod);
}
catch (_a) {
throw new anchoringChannelError_1.default(anchoringChannelErrorNames_1.default.DID_NOT_FOUND, "DID cannot be resolved");
}
});
}
/**
* Verifies that the secret really corresponds to the verification method
*
* @param didDocument DID document
* @param method The method (expressed as a fragment identifier)
* @param secret The private key (in base 58)
*
* @returns true if verified false if not
*/
static verifyOwnership(didDocument, method, secret) {
return __awaiter(this, void 0, void 0, function* () {
// First we verify if the method really exists on the DID
try {
didDocument.resolveKey(`${didDocument.id}#${method}`);
}
catch (_a) {
throw new anchoringChannelError_1.default(anchoringChannelErrorNames_1.default.INVALID_DID_METHOD, "The DID method supplied is not valid");
}
try {
const verificationData = { "testData": channelHelper_1.ChannelHelper.generateSeed(10) };
const signature = yield didDocument.signData(verificationData, {
secret,
method: `${didDocument.id}#${method}`
});
return didDocument.verifyData(signature);
}
catch (_b) {
throw new anchoringChannelError_1.default(anchoringChannelErrorNames_1.default.INVALID_SIGNING_KEY, "The key supplied is not valid");
}
});
}
}
exports.default = DidService;
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