vc-status-registry
Version:
Interact with a registry for credential statuses on Ethereum
153 lines • 6.73 kB
JavaScript
"use strict";
/*
* Copyright 2020 Coöperatieve Rabobank U.A.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.VcStatusRegistry = void 0;
const ethers_1 = require("ethers");
const interfaces_1 = require("./interfaces");
const _1 = require(".");
const rxjs_1 = require("rxjs");
const ABI = require('./ABI.json');
class VcStatusRegistry {
/**
* @constructor Will set up the connection to an ethereum provider with provided credentials.
* @param _ethereumProvider connection string
* @param _contractAddress address of the contract '0x...'
* @param privateKey optional, private key for issuing credentials
* @param _options optional, see VcStatusRegistryOptions
*/
constructor(_ethereumProvider, _contractAddress, privateKey, _options = {}) {
this._ethereumProvider = _ethereumProvider;
this._contractAddress = _contractAddress;
this._options = _options;
this._onNewBlock = new rxjs_1.Subject();
this._onSetVcStatus = new rxjs_1.Subject();
this._onRemoveVcStatus = new rxjs_1.Subject();
this._onError = new rxjs_1.Subject();
this.setVcStatus = (credentialId, value = true) => __awaiter(this, void 0, void 0, function* () {
const method = value ? 'setVcStatus' : 'removeVcStatus';
if (!this._wallet) {
throw (new Error(`Error: Can not call "${method}" without privateKey`));
}
const nonce = yield this._transactionCount.transactionCount();
const overrides = {
nonce: nonce,
gasPrice: this._options.gasPrice,
gasLimit: this._options.gasLimit
};
const txResponse = yield this._contractMethod(method, [credentialId], overrides);
return txResponse.hash;
});
this.getVcStatus = (issuer, credentialId) => __awaiter(this, void 0, void 0, function* () {
return this._contract.getVcStatus(issuer, credentialId);
});
// Isolate external function for sinon stub
this._contractMethod = (method, parameters, overrides) => __awaiter(this, void 0, void 0, function* () {
return this._contract[method](...parameters, overrides);
});
// Probably remove since they are convenience methods, should live in a separate class
this.getBlockNumber = () => __awaiter(this, void 0, void 0, function* () {
return this.provider.getBlockNumber();
});
this._provider = new ethers_1.ethers.providers.JsonRpcProvider(this._ethereumProvider);
this._contract = new ethers_1.ethers.Contract(this._contractAddress, ABI, this._provider);
if (privateKey) {
this._wallet = new ethers_1.ethers.Wallet(Buffer.from(privateKey, 'hex'), this._provider);
this._transactionCount = new _1.TransactionCount(this._wallet, this._options);
this._contract = this._contract.connect(this._wallet);
}
this.initiateStatusEventSubscriber(interfaces_1.PastEventType.set);
this.initiateStatusEventSubscriber(interfaces_1.PastEventType.remove);
this.initiateErrorEventSubscriber();
this.initiateNewBlockEventSubscriber();
}
get ethereumProvider() {
return this._ethereumProvider;
}
get contractAddress() {
return this._contractAddress;
}
get provider() {
return this._provider;
}
get wallet() {
return this._wallet;
}
get ABI() {
return ABI;
}
get onNewBlock() {
return this._onNewBlock;
}
get onSetVcStatus() {
return this._onSetVcStatus;
}
get onRemoveVcStatus() {
return this._onRemoveVcStatus;
}
get onError() {
return this._onError;
}
initiateStatusEventSubscriber(eventType) {
const eventId = (eventType === interfaces_1.PastEventType.set) ? 'VcStatusSet(address,address)' : 'VcStatusRemoved(address,address)';
const statusSetFilter = {
address: this.contractAddress,
topics: [ethers_1.ethers.utils.id(eventId)]
};
this.provider.on(statusSetFilter, (result) => {
switch (eventType) {
case interfaces_1.PastEventType.set:
this._onSetVcStatus.next(result);
break;
case interfaces_1.PastEventType.remove:
this._onRemoveVcStatus.next(result);
break;
}
});
}
initiateErrorEventSubscriber() {
this.provider.on('error', (error) => {
this._onError.next(error);
});
}
initiateNewBlockEventSubscriber() {
this.provider.on('block', (blockNumber) => {
this._onNewBlock.next({ blockNumber });
});
}
getPastStatusEvents(eventType, did, fromBlock = 0, toBlock = 'latest') {
const eventId = (eventType === interfaces_1.PastEventType.set) ? 'VcStatusSet(address,address)' : 'VcStatusRemoved(address,address)';
const filter = {
address: this.contractAddress,
fromBlock: fromBlock,
toBlock: toBlock,
// second argument is an empty array to ignore issuer did
topics: [ethers_1.ethers.utils.id(eventId), [], did]
};
return this.provider.getLogs(filter);
}
}
exports.VcStatusRegistry = VcStatusRegistry;
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