bank-client-js/lib/index.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    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) : new P(function (resolve) { resolve(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 crypto = require("libp2p-crypto");
const ws_1 = __importDefault(require("ws"));
const content_item_1 = require("./content-item");
const util_1 = require("./util");
class BankClient {
    constructor(urlBase, ipfsUrlBase, storage, webClient) {
        this.urlBase = urlBase;
        this.ipfsUrlBase = ipfsUrlBase;
        this.storage = storage;
        this.webClient = webClient;
        this.wsUrlBase = urlBase.replace(/^http/i, 'ws');
    }
    static parseBankLink(bankLink) {
        if (!bankLink.startsWith('bank:')) {
            throw new Error('address must start with bank:');
        }
        const deprefixed = bankLink.substring(5);
        let host;
        let address;
        let topic;
        if (deprefixed[0] === '/' && deprefixed[1] === '/') {
            [host, address, topic] = deprefixed.substring(2).split('/');
        }
        else {
            [address, topic] = deprefixed.split('/');
        }
        if (!address || !topic) {
            throw new Error('cannot parse address and topic');
        }
        return { host, address, topic };
    }
    getPub() {
        return new Promise((resolve, reject) => __awaiter(this, void 0, void 0, function* () {
            yield this.bootstrap();
            this.getPriv().id((idErr, pubHash) => {
                if (idErr) {
                    return reject(idErr);
                }
                resolve(pubHash);
            });
        }));
    }
    bootstrap() {
        if (this.bootstrapResult) {
            return Promise.resolve(this.bootstrapResult);
        }
        if (this.bootstrapPromise) {
            return this.bootstrapPromise;
        }
        return this.bootstrapPromise = new Promise((resolve, reject) => {
            this.storage.get('notaprivatekey').then(privateKeyFromStorage => {
                if (privateKeyFromStorage == null) {
                    console.log('no private key in storage. generating new');
                    crypto.keys.generateKeyPair('RSA', 2048, (generateErr, privateKey) => {
                        if (generateErr) {
                            return reject(generateErr);
                        }
                        privateKey.export('password', (exportErr, exportResult) => {
                            if (exportErr) {
                                return reject(exportErr);
                            }
                            this.storage.set('notaprivatekey', exportResult).then(err => {
                                // whatever
                            }).catch(reject);
                            this.privateKey = privateKey;
                            resolve(true);
                        });
                    });
                }
                else {
                    // console.log('importing privatekey');
                    crypto.keys.import(privateKeyFromStorage, 'password', (err, importedPrivateKey) => {
                        if (err) {
                            return reject(err);
                        }
                        this.privateKey = importedPrivateKey;
                        // console.log(this.getPublicKeyString());
                        // console.log(privateKeyFromStorage);
                        resolve(true);
                    });
                }
            }).catch(reject);
        });
    }
    getNonce() {
        return __awaiter(this, void 0, void 0, function* () {
            const nonce = yield this.webClient.request({
                method: 'GET',
                url: this.urlBase + '/bank/nonce'
            });
            return Number(nonce);
        });
    }
    getBalance() {
        return __awaiter(this, void 0, void 0, function* () {
            const nonce = yield this.getNonce();
            const retrieveRequest = yield this.makePlaintextPayload(JSON.stringify({
                _date: new Date().toISOString(),
                _nonce: nonce
            }));
            const topicURL = this.urlBase + '/bank/getbalance';
            const postResponse = yield this.webClient.requestJSON({
                body: retrieveRequest,
                method: 'POST',
                url: topicURL
            });
            return postResponse.balance;
        });
    }
    upload(params) {
        return __awaiter(this, void 0, void 0, function* () {
            const url = this.urlBase + '/bank/upload';
            const formData = {};
            if (params.fileData) {
                formData.file = {
                    value: params.fileData,
                    options: {
                        filename: params.fileName
                    }
                };
            }
            if (params.thumbFileData) {
                formData.thumb = {
                    value: params.thumbFileData,
                    options: {
                        filename: params.thumbFileName
                    }
                };
            }
            if (params.links) {
                formData.links = JSON.stringify(params.links);
            }
            for (const attr of ['title', 'text', 'type']) {
                if (params[attr] != null) {
                    formData[attr] = params[attr];
                }
            }
            // console.log('formData', formData);
            const uploadResponse = yield this.webClient.requestJSON({
                formData,
                method: 'POST',
                url
            });
            // console.log('uploadResponse', uploadResponse);
            return uploadResponse.hash;
        });
    }
    uploadSlimJSON(item) {
        return __awaiter(this, void 0, void 0, function* () {
            const url = this.urlBase + '/bank/upload/slim';
            const uploadResponse = yield this.webClient.requestJSON({
                body: item,
                method: 'POST',
                url
            });
            // console.log('uploadResponse', uploadResponse);
            return uploadResponse.hash;
        });
    }
    uploadSlimText(item) {
        return __awaiter(this, void 0, void 0, function* () {
            const url = this.urlBase + '/bank/upload/slim';
            const uploadResponse = JSON.parse(yield this.webClient.request({
                body: item,
                headers: {
                    'content-type': 'text/plain'
                },
                method: 'POST',
                url
            }));
            // console.log('uploadResponse', uploadResponse);
            return uploadResponse.hash;
        });
    }
    appendBank(bankAddress, bankTopic, itemHash) {
        return __awaiter(this, void 0, void 0, function* () {
            const payload = yield this.makePlaintextPayload(itemHash);
            const topicURL = this.urlBase + '/bank/private/' + encodeURIComponent(bankAddress) + '/' + encodeURIComponent(bankTopic);
            yield this.webClient.requestJSON({
                body: payload,
                method: 'PUT',
                url: topicURL
            });
        });
    }
    retrievePrivate(peerAddr, topic) {
        return __awaiter(this, void 0, void 0, function* () {
            const nonce = yield this.getNonce();
            const retrieveRequest = yield this.makePlaintextPayload(JSON.stringify({
                _date: new Date().toISOString(),
                _nonce: nonce
            }));
            const topicURL = this.urlBase + '/bank/private/' + encodeURIComponent(peerAddr) + '/' + encodeURIComponent(topic);
            const result = yield this.webClient.request({
                body: JSON.stringify(retrieveRequest),
                headers: {
                    'content-type': 'application/json'
                },
                method: 'POST',
                url: topicURL
            });
            return result;
        });
    }
    subscribePrivate(peerAddr, topic, connectCallback, messageCallback) {
        return __awaiter(this, void 0, void 0, function* () {
            yield this.connectWebsocket(peerAddr, topic, connectCallback, messageCallback);
        });
    }
    appendPrivate(peerAddr, topic, hash, replaceHash, deleteHash) {
        return __awaiter(this, void 0, void 0, function* () {
            const nonce = yield this.getNonce();
            const payload = yield this.makePlaintextPayload(JSON.stringify({
                _date: new Date().toISOString(),
                _nonce: nonce,
                deleteHash,
                hash,
                replaceHash,
            }));
            const topicURL = this.urlBase + '/bank/private/' + encodeURIComponent(peerAddr) + '/' + encodeURIComponent(topic);
            const result = yield this.webClient.request({
                body: JSON.stringify(payload),
                headers: {
                    'content-type': 'application/json'
                },
                method: 'PUT',
                url: topicURL
            });
        });
    }
    getOrCreateContact(peerId, contactAddr) {
        return __awaiter(this, void 0, void 0, function* () {
            const contactList = yield this.retrievePrivate(peerId, '📇');
            const itemList = yield this.getItemsForCommaList(contactList);
            // console.log('contact hash for', contact, type, 'is', contactHash);
            const existing = itemList.filter(item => item.addrs && item.addrs.includes(contactAddr))[0];
            if (existing != null) {
                return existing;
            }
            const newItem = {
                addrs: [
                    contactAddr
                ],
                id: util_1.uuid()
            };
            const newItemHash = yield this.uploadSlimJSON(newItem);
            yield this.appendPrivate(peerId, '📇', newItemHash);
            return newItem;
        });
    }
    getContactById(peerId, contactId) {
        return __awaiter(this, void 0, void 0, function* () {
            const contactList = yield this.retrievePrivate(peerId, '📇');
            const itemList = yield this.getItemsForCommaList(contactList);
            const existing = itemList.filter(item => item.id === contactId)[0];
            if (!existing) {
                throw new Error('Cannot find contact with id ' + contactId);
            }
            return existing;
        });
    }
    updateContact(peerId, contactId, newProperties) {
        return __awaiter(this, void 0, void 0, function* () {
            const existing = yield this.getContactById(peerId, contactId);
            const newProps = util_1.mergeDeep({}, newProperties);
            delete newProps.id;
            const newItem = util_1.mergeDeep(existing, newProps);
            delete newItem.hash;
            const newItemHash = yield this.uploadSlimJSON(newItem);
            yield this.appendPrivate(peerId, '📇', newItemHash, existing.hash);
            return yield this.getContactById(peerId, contactId);
        });
    }
    getContentItemByHash(hash) {
        return __awaiter(this, void 0, void 0, function* () {
            if (hash.startsWith('/ipfs/')) {
                hash = hash.split('/').pop();
            }
            const contentParams = (yield this.webClient.requestJSON({
                method: 'get',
                url: this.ipfsUrlBase + '/ipfs/' + hash + '/content.json'
            }));
            return new content_item_1.ContentItem(hash, contentParams);
        });
    }
    getItemsForCommaList(commaList) {
        return __awaiter(this, void 0, void 0, function* () {
            const itemHashes = commaList.split(',').filter(x => x.trim() !== '');
            const items = yield Promise.all(itemHashes.map(itemId => {
                return this.webClient.requestJSON({
                    method: 'get',
                    url: this.ipfsUrlBase + '/ipfs/' + itemId,
                });
            }));
            for (const item of items) {
                item.hash = itemHashes.shift();
            }
            return items;
        });
    }
    connectWebsocket(peerAddr, topic, connectCallback, messageCallback) {
        return new Promise((resolve, reject) => __awaiter(this, void 0, void 0, function* () {
            const nonce = yield this.getNonce();
            const retrieveRequest = yield this.makePlaintextPayload(JSON.stringify({
                _date: new Date().toISOString(),
                _nonce: nonce,
                addr: peerAddr,
                topic: topic
            }));
            const jsonOutput = JSON.stringify(retrieveRequest);
            const base64ed = Buffer.from(jsonOutput).toString('base64');
            const encoded = encodeURIComponent(base64ed);
            const ws = new ws_1.default(this.wsUrlBase + '/bank/ws?arg=' + encoded);
            ws.on('open', () => {
                connectCallback();
            });
            ws.on('message', data => {
                messageCallback(data);
            });
            const reconnect = () => {
                console.log('reconnect');
                try {
                    ws.terminate();
                }
                finally {
                    console.log('reconnecting in 5s');
                    setTimeout(() => {
                        this.connectWebsocket(peerAddr, topic, connectCallback, messageCallback);
                    }, 5000);
                }
            };
            ws.on('error', err => {
                console.error('websocket error', err);
            });
            ws.on('close', err => {
                reconnect();
            });
            resolve();
        }));
    }
    getPriv() {
        if (!this.privateKey) {
            throw new Error('missing private key');
        }
        return this.privateKey;
    }
    makePlaintextPayload(message) {
        const messageBytes = Buffer.from(message, 'utf-8');
        return new Promise((resolve, reject) => __awaiter(this, void 0, void 0, function* () {
            yield this.bootstrap();
            this.privateKey.sign(messageBytes, (signErr, signatureBytes) => __awaiter(this, void 0, void 0, function* () {
                if (signErr) {
                    reject(signErr);
                    return;
                }
                const publicDERBytes = this.privateKey.public.bytes;
                this.privateKey.id((idErr, pubHash) => {
                    if (idErr) {
                        reject(idErr);
                        return;
                    }
                    const result = {
                        date: new Date().toISOString(),
                        msg: util_1.encodeHex(messageBytes),
                        pub: util_1.encodeHex(publicDERBytes),
                        pubHash,
                        sig: util_1.encodeHex(signatureBytes),
                    };
                    // console.log('result', result, signatureBytes);
                    resolve(result);
                });
            }));
        }));
    }
}
exports.BankClient = BankClient;
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