502 lines
14 KiB
JavaScript
502 lines
14 KiB
JavaScript
/*jshint esversion: 6 */
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//var Ipfs = require('./ipfs.js');
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//=========================================================
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// Embark Smart Contracts
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//=========================================================
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var EmbarkJS = {};
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EmbarkJS.Contract = function(options) {
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var self = this;
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var i, abiElement;
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this.abi = options.abi;
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this.address = options.address;
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this.code = '0x' + options.code;
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this.web3 = options.web3 || web3;
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var ContractClass = this.web3.eth.contract(this.abi);
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this.eventList = [];
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if (this.abi) {
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for (i = 0; i < this.abi.length; i++) {
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abiElement = this.abi[i];
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if (abiElement.type === 'event') {
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this.eventList.push(abiElement.name);
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}
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}
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}
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var messageEvents = function() {
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this.cb = function() {};
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};
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messageEvents.prototype.then = function(cb) {
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this.cb = cb;
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};
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messageEvents.prototype.error = function(err) {
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return err;
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};
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this._originalContractObject = ContractClass.at(this.address);
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this._methods = Object.getOwnPropertyNames(this._originalContractObject).filter(function(p) {
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// TODO: check for forbidden properties
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if (self.eventList.indexOf(p) >= 0) {
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self[p] = function() {
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var promise = new messageEvents();
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var args = Array.prototype.slice.call(arguments);
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args.push(function(err, result) {
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if (err) {
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promise.error(err);
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} else {
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promise.cb(result);
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}
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});
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self._originalContractObject[p].apply(self._originalContractObject[p], args);
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return promise;
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};
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return true;
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} else if (typeof self._originalContractObject[p] === 'function') {
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self[p] = function(_args) {
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var args = Array.prototype.slice.call(arguments);
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var fn = self._originalContractObject[p];
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var props = self.abi.find((x) => x.name == p);
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var promise = new Promise(function(resolve, reject) {
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args.push(function(err, transaction) {
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promise.tx = transaction;
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if (err) {
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return reject(err);
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}
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var getConfirmation = function() {
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self.web3.eth.getTransactionReceipt(transaction, function(err, receipt) {
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if (err) {
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return reject(err);
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}
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if (receipt !== null) {
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return resolve(receipt);
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}
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setTimeout(getConfirmation, 1000);
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});
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};
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if (typeof(transaction) !== "string" || props.constant) {
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resolve(transaction);
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} else {
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getConfirmation();
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}
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});
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fn.apply(fn, args);
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});
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return promise;
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};
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return true;
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}
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return false;
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});
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};
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EmbarkJS.Contract.prototype.deploy = function(args, _options) {
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var self = this;
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var contractParams;
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var options = _options || {};
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contractParams = args || [];
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contractParams.push({
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from: this.web3.eth.accounts[0],
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data: this.code,
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gas: options.gas || 800000
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});
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var contractObject = this.web3.eth.contract(this.abi);
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var promise = new Promise(function(resolve, reject) {
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contractParams.push(function(err, transaction) {
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if (err) {
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reject(err);
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} else if (transaction.address !== undefined) {
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resolve(new EmbarkJS.Contract({
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abi: self.abi,
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code: self.code,
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address: transaction.address
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}));
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}
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});
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// returns promise
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// deploys contract
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// wraps it around EmbarkJS.Contract
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contractObject["new"].apply(contractObject, contractParams);
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});
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return promise;
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};
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//=========================================================
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// Embark Storage
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//=========================================================
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EmbarkJS.Storage = {};
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EmbarkJS.Storage.Providers = {
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IPFS: 'ipfs',
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SWARM: 'swarm'
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};
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EmbarkJS.Storage.IPFS = {};
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EmbarkJS.Storage.saveText = function(text) {
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return this.currentStorage.saveText(text);
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};
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EmbarkJS.Storage.get = function(hash) {
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return this.currentStorage.get(hash);
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};
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EmbarkJS.Storage.uploadFile = function(inputSelector) {
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return this.currentStorage.uploadFile(inputSelector);
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};
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EmbarkJS.Storage.getUrl = function(hash) {
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return this.currentStorage.getUrl(hash);
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};
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EmbarkJS.Storage.setProvider = function(provider, options) {
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var self = this;
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var promise = new Promise(function(resolve, reject) {
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if (provider.toLowerCase() === EmbarkJS.Storage.Providers.IPFS) {
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//I don't think currentStorage is used anywhere, this might not be needed
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//for now until additional storage providers are supported. But keeping it
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//anyways
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self.currentStorage = EmbarkJS.Storage.IPFS;
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try {
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if (options === undefined) {
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self.ipfsConnection = IpfsApi('localhost', '5001');
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} else {
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self.ipfsConnection = IpfsApi(options.server, options.port);
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}
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resolve(self);
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} catch (err) {
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self.ipfsConnection = null;
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reject(new Error('Failed to connect to IPFS'));
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}
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} else if (provider.toLowerCase() === EmbarkJS.Storage.SWARM) {
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reject('Swarm not implemented');
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// TODO Implement Swarm
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// this.currentStorage = EmbarkJS.Storage.SWARM;
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// if (options === undefined) {
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// //Connect to default Swarm node
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// } else {
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// //Connect using options
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// }
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} else {
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reject('Unknown storage provider');
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}
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});
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return promise;
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};
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EmbarkJS.Storage.IPFS.saveText = function(text) {
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var promise = new Promise(function(resolve, reject) {
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if (!EmbarkJS.Storage.ipfsConnection) {
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var connectionError = new Error('No IPFS connection. Please ensure to call Embark.Storage.setProvider()');
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reject(connectionError);
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}
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EmbarkJS.Storage.ipfsConnection.add((new EmbarkJS.Storage.ipfsConnection.Buffer(text)), function(err, result) {
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if (err) {
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reject(err);
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} else {
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resolve(result[0].path);
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}
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});
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});
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return promise;
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};
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EmbarkJS.Storage.IPFS.get = function(hash) {
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// TODO: detect type, then convert if needed
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//var ipfsHash = web3.toAscii(hash);
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var promise = new Promise(function(resolve, reject) {
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if (!EmbarkJS.Storage.ipfsConnection) {
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var connectionError = new Error('No IPFS connection. Please ensure to call Embark.Storage.setProvider()');
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reject(connectionError);
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}
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EmbarkJS.Storage.ipfsConnection.object.get([hash]).then(function(node) {
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resolve(node.data);
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}).catch(function(err) {
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reject(err);
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});
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});
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return promise;
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};
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EmbarkJS.Storage.IPFS.uploadFile = function(inputSelector) {
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var file = inputSelector[0].files[0];
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if (file === undefined) {
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throw new Error('no file found');
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}
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var promise = new Promise(function(resolve, reject) {
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if (!EmbarkJS.Storage.ipfsConnection) {
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var connectionError = new Error('No IPFS connection. Please ensure to call Embark.Storage.setProvider()');
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reject(connectionError);
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}
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var reader = new FileReader();
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reader.onloadend = function() {
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var fileContent = reader.result;
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var buffer = EmbarkJS.Storage.ipfsConnection.Buffer.from(fileContent);
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EmbarkJS.Storage.ipfsConnection.add(buffer, function(err, result) {
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if (err) {
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reject(err);
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} else {
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resolve(result[0].path);
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}
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});
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};
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reader.readAsArrayBuffer(file);
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});
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return promise;
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};
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EmbarkJS.Storage.IPFS.getUrl = function(hash) {
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//var ipfsHash = web3.toAscii(hash);
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return 'http://localhost:8080/ipfs/' + hash;
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};
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//=========================================================
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// Embark Messaging
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//=========================================================
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EmbarkJS.Messages = {};
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EmbarkJS.Messages.setProvider = function(provider, options) {
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var self = this;
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var ipfs;
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if (provider === 'whisper') {
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this.currentMessages = EmbarkJS.Messages.Whisper;
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if (typeof variable === 'undefined') {
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if (options === undefined) {
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web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
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} else {
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web3 = new Web3(new Web3.providers.HttpProvider("http://" + options.server + ':' + options.port));
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}
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}
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web3.version.getWhisper(function(err, res) {
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if (err) {
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console.log("whisper not available");
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} else {
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self.currentMessages.identity = web3.shh.newIdentity();
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}
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});
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} else if (provider === 'orbit') {
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this.currentMessages = EmbarkJS.Messages.Orbit;
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if (options === undefined) {
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ipfs = HaadIpfsApi('localhost', '5001');
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} else {
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ipfs = HaadIpfsApi(options.server, options.port);
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}
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this.currentMessages.orbit = new Orbit(ipfs);
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this.currentMessages.orbit.connect(web3.eth.accounts[0]);
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} else {
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throw Error('Unknown message provider');
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}
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};
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EmbarkJS.Messages.sendMessage = function(options) {
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return this.currentMessages.sendMessage(options);
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};
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EmbarkJS.Messages.listenTo = function(options) {
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return this.currentMessages.listenTo(options);
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};
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EmbarkJS.Messages.Whisper = {};
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EmbarkJS.Messages.Whisper.sendMessage = function(options) {
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var topics = options.topic || options.topics;
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var data = options.data || options.payload;
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var identity = options.identity || this.identity || web3.shh.newIdentity();
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var ttl = options.ttl || 100;
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var priority = options.priority || 1000;
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var _topics;
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if (topics === undefined) {
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throw new Error("missing option: topic");
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}
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if (data === undefined) {
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throw new Error("missing option: data");
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}
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// do fromAscii to each topics unless it's already a string
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if (typeof topics === 'string') {
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_topics = [web3.fromAscii(topics)];
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} else {
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// TODO: replace with es6 + babel;
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for (var i = 0; i < topics.length; i++) {
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_topics.push(web3.fromAscii(topics[i]));
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}
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}
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topics = _topics;
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var payload = JSON.stringify(data);
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var message = {
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from: identity,
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topics: topics,
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payload: web3.fromAscii(payload),
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ttl: ttl,
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priority: priority
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};
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return web3.shh.post(message, function() {});
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};
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EmbarkJS.Messages.Whisper.listenTo = function(options) {
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var topics = options.topic || options.topics;
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var _topics = [];
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if (typeof topics === 'string') {
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_topics = [topics];
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} else {
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// TODO: replace with es6 + babel;
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for (var i = 0; i < topics.length; i++) {
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_topics.push(topics[i]);
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}
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}
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topics = _topics;
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var filterOptions = {
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topics: topics
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};
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var messageEvents = function() {
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this.cb = function() {};
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};
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messageEvents.prototype.then = function(cb) {
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this.cb = cb;
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};
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messageEvents.prototype.error = function(err) {
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return err;
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};
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messageEvents.prototype.stop = function() {
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this.filter.stopWatching();
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};
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var promise = new messageEvents();
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var filter = web3.shh.filter(filterOptions, function(err, result) {
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var payload = JSON.parse(web3.toAscii(result.payload));
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var data;
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if (err) {
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promise.error(err);
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} else {
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data = {
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topic: topics,
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data: payload,
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from: result.from,
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time: (new Date(result.sent * 1000))
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};
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promise.cb(payload, data, result);
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}
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});
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promise.filter = filter;
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return promise;
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};
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EmbarkJS.Messages.Orbit = {};
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EmbarkJS.Messages.Orbit.sendMessage = function(options) {
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var topics = options.topic || options.topics;
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var data = options.data || options.payload;
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if (topics === undefined) {
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throw new Error("missing option: topic");
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}
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if (data === undefined) {
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throw new Error("missing option: data");
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}
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if (typeof topics === 'string') {
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topics = topics;
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} else {
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// TODO: better to just send to different channels instead
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topics = topics.join(',');
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}
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this.orbit.join(topics);
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var payload = JSON.stringify(data);
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this.orbit.send(topics, data);
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};
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EmbarkJS.Messages.Orbit.listenTo = function(options) {
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var self = this;
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var topics = options.topic || options.topics;
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if (typeof topics === 'string') {
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topics = topics;
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} else {
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topics = topics.join(',');
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}
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this.orbit.join(topics);
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var messageEvents = function() {
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this.cb = function() {};
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};
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messageEvents.prototype.then = function(cb) {
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this.cb = cb;
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};
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messageEvents.prototype.error = function(err) {
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return err;
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};
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var promise = new messageEvents();
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this.orbit.events.on('message', (channel, message) => {
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// TODO: looks like sometimes it's receving messages from all topics
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if (topics !== channel) return;
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self.orbit.getPost(message.payload.value, true).then((post) => {
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var data = {
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topic: channel,
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data: post.content,
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from: post.meta.from.name,
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time: (new Date(post.meta.ts))
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};
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promise.cb(post.content, data, post);
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});
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});
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return promise;
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};
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module.exports = EmbarkJS;
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