smarter store update after replacing chains
concurrent mining validity checks for new transactions/blocks/metadata rdf store stores quads smarter clearing of transactions from pool when a new block is mined change querying to be readonly and generic moved some things around
This commit is contained in:
Josip Milovac
parent
ea81105df6
commit
b4c2a0c88d
7 changed files with 373 additions and 177 deletions
146
app/index.js
146
app/index.js
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@ -33,8 +33,8 @@ const Blockchain = require('../blockchain');
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const P2pServer = require('./p2p-server');
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const Wallet = require('../wallet');
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const TransactionPool = require('../wallet/transaction-pool');
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const Miner = require('./miner');
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const QueryEngine = require('@comunica/query-sparql').QueryEngine;
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const ChainUtil = require('../chain-util');
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const N3 = require('n3');
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const jsonld = require('jsonld');
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@ -51,10 +51,10 @@ const multer = require('multer');/* Multer is a node.js middleware for
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const app = express();
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const bc = new Blockchain();
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const wallet = new Wallet();
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//currently gen a new keypair per run, we probably want to load this from something else in the future
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const wallet = new Wallet(ChainUtil.genKeyPair());
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const tp = new TransactionPool();
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const p2pServer = new P2pServer(bc, tp,'./persist_block_chain.json');
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const miner = new Miner(bc, tp, wallet, p2pServer);
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const p2pServer = new P2pServer(bc, tp, wallet, './persist_block_chain.json');
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const parser = new N3.Parser(); //({format: 'application/n-quads'});
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const myEngine = new QueryEngine();
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@ -119,12 +119,12 @@ app.get('/Transactions', (req, res) => {
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res.json(tp);
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});
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///////////////
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app.get('/mine-transactions', (req, res) => {
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const block = miner.mine();
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console.log(`New block added: ${block.toString()}`);
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res.redirect('/blocks');
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// res.json("Block mined");
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});
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//app.get('/mine-transactions', (req, res) => {
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// const block = miner.mine();
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// console.log(`New block added: ${block.toString()}`);
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// res.redirect('/blocks');
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// // res.json("Block mined");
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//});
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///////////////
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app.get('/public-key', (req, res) => {
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res.json({ publicKey: wallet.publicKey });
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@ -137,60 +137,66 @@ app.get('/Balance', (req, res) => {
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///////////////
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//this API prints all the quads stored in the RDF store and returns the entire store
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app.get('/quads', (req, res) => {
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for (const quad of store)
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console.log(quad);
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//for (const quad of store)
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//console.log(quad);
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res.json(store);
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});
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app.get('/IoTdeviceRegistration', (req, res)=> {
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fs.readdir('./uploads', function(err, files) {
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console.log(files[files.length-2]);
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var FileName = files[files.length-2];
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let rawdata = fs.readFileSync(`./uploads/${FileName}`);
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let SenShaMartDesc = JSON.parse(rawdata);
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/* the following piece of code is used to genrate JSON object out of name-value pairs submitted
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let SenShaMartExtNames = ['Name','Geo' ,'IP_URL' , 'Topic_Token', 'Permission', 'RequestDetail',
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'OrgOwner', 'DepOwner','PrsnOwner', 'PaymentPerKbyte',
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'PaymentPerMinute','Protocol', 'MessageAttributes', 'Interval',
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'FurtherDetails']
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let SenShaMartExtValues = [Name,Geo ,IP_URL , Topic_Token, Permission, RequestDetail,
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OrgOwner, DepOwner,PrsnOwner, PaymentPerKbyte,
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PaymentPerMinute,Protocol, MessageAttributes, Interval,
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FurtherDetails]
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let SenSHaMArtExt = {};
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for (let i =0; i <SenShaMartExtNames.length; i++){
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SenSHaMArtExt[`${SenShaMartExtNames[i]}`]= SenShaMartExtValues[i]
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//console.log(files[files.length-2]);
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var FileName = files[files.length-2];
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let rawdata = fs.readFileSync(`./uploads/${FileName}`);
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let SenShaMartDesc = JSON.parse(rawdata);
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/* the following piece of code is used to genrate JSON object out of name-value pairs submitted
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let SenShaMartExtNames = ['Name','Geo' ,'IP_URL' , 'Topic_Token', 'Permission', 'RequestDetail',
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'OrgOwner', 'DepOwner','PrsnOwner', 'PaymentPerKbyte',
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'PaymentPerMinute','Protocol', 'MessageAttributes', 'Interval',
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'FurtherDetails']
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let SenShaMartExtValues = [Name,Geo ,IP_URL , Topic_Token, Permission, RequestDetail,
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OrgOwner, DepOwner,PrsnOwner, PaymentPerKbyte,
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PaymentPerMinute,Protocol, MessageAttributes, Interval,
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FurtherDetails]
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let SenSHaMArtExt = {};
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for (let i =0; i <SenShaMartExtNames.length; i++){
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SenSHaMArtExt[`${SenShaMartExtNames[i]}`]= SenShaMartExtValues[i]
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}
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//let SenShaMartOnt = SSNmetadata;
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//SenShaMartOnt.push(SenSHaMArtExt); */
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console.log(SenShaMartDesc)
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jsonld.toRDF(SenShaMartDesc, {format: 'application/n-quads'},
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(err, nquads) => {
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console.log(nquads)
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var metaDataTransaction = wallet.createMetadata(
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nquads, tp);
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}
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//let SenShaMartOnt = SSNmetadata;
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//SenShaMartOnt.push(SenSHaMArtExt); */
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//console.log(SenShaMartDesc);
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jsonld.toRDF(SenShaMartDesc, {format: 'application/n-quads'},
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(err, nquads) => {
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//console.log(nquads)
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var metadata = wallet.createMetadata(
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nquads, tp);
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p2pServer.newMetadata(metadata);
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});
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});
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res.json("MetadataTransactionCreated");
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});
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res.json("MetadataTransactionCreated");
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});
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//////////////////////////////////////////////////
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// POST APIs
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app.post('/mine', (req, res) => {
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const block = bc.addBlock(req.body.data);
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console.log(`New block added: ${block.toString()}`);
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//this doesn't work well with the continious miner
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//app.post('/mine', (req, res) => {
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// const block = bc.addBlock(req.body.data);
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// console.log(`New block added: ${block.toString()}`);
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p2pServer.newBlock(block);
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// p2pServer.newBlock(block);
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res.redirect('/blocks');
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});
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// res.redirect('/blocks');
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//});
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///////////////
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app.post('/PaymentTransaction', (req, res) => {
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const { recipient, amount } = req.body;
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const transaction = wallet.createTransaction(recipient, amount, bc, tp);
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//p2pServer.broadcastTransaction(transaction);
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if (transaction === null) {
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res.json("Couldn't create transaction");
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return;
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}
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p2pServer.newTransaction(transaction);
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res.redirect('/transactions');
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});
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@ -198,11 +204,12 @@ app.post('/PaymentTransaction', (req, res) => {
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app.post('/IoTdevicePaymentTransaction', (req, res) => {
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const { Recipient_payment_address, Amount_of_money, Payment_method,
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Further_details} = req.body;
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if (Payment_method == "SensorCoin"){
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const PaymentTransaction = wallet.createCoinTransaction(
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Recipient_payment_address, Amount_of_money, bc, tp);
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p2pServer.broadcastCoinTransaction(PaymentTransaction);
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res.json("PaymentTransactionCreated");
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if (Payment_method == "SensorCoin") {
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//create coin transaction doesn't exist yet
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const PaymentTransaction = wallet.createCoinTransaction(
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Recipient_payment_address, Amount_of_money, bc, tp);
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p2pServer.broadcastCoinTransaction(PaymentTransaction);
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res.json("PaymentTransactionCreated");
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}
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else if (Payment_method == "Bitcoin") {
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res.redirect('/BitcoinTransaction')
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@ -233,21 +240,30 @@ app.post("/UploadMetafile", upload.single('file'), (req, res) => {
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//Start of comunica sparql query code
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app.post('/sparql', (req, res) => {
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console.log(req.body);
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const {Select,subject,predicate,object,Limit}= req.body;
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const start = async function (a,b){
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const bindingsStream = await myEngine.queryBindings(`SELECT ${Select} WHERE
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{${subject} ${predicate} ${object}} LIMIT
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${Limit}`, { sources: [{ type: 'rdfjsSource',
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value: p2pServer.store}]
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});
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bindingsStream.on('data', (binding) => {
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console.log(binding.toString());
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queryResult= binding;
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const start = async function () {
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let result = [];
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const bindingsStream = await myEngine.queryBindings(
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req.body,
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{
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readOnly: true,
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sources: [{
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type: 'rdfjsSource',
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value: p2pServer.store
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}]
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});
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};
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start()
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res.json("Query succsessful");
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});
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bindingsStream.on('data', (binding) => {
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console.log(binding.toString());
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result.push(binding);
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});
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bindingsStream.on('end', () => {
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res.json(JSON.stringify(result));
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});
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bindingsStream.on('error', (err) => {
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console.error(err);
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});
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};
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start()
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});
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///////////////////////////////////////////////////////////Integration///////////////////////////////////////////////////////////
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DistributedBrokers = ["mqtt.eclipse.org", "test.mosquitto.org","broker.hivemq.com"];
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84
app/miner.js
84
app/miner.js
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@ -1,34 +1,88 @@
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const Wallet = require('../wallet');
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const Transaction = require('../wallet/transaction');
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const Block = require('../blockchain/block');
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class Miner {
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static STATE_WAITING = 0;
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static STATE_RUNNING = 1;
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static STATE_INTERRUPTED = 2;
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static STATE_RESTARTING = 3;
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constructor(blockchain, transactionPool, wallet, p2pServer) {
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this.blockchain = blockchain;
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this.transactionPool = transactionPool;
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this.wallet = wallet;
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this.p2pServer = p2pServer;
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}
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this.state = Miner.STATE_WAITING;
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this.mining = [[], []];
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this.lastBlock = null;
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}
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interrupt() {
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if (this.state === Miner.STATE_RUNNING) {
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this.state = Miner.STATE_INTERRUPTED;
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}
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}
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interruptIfContainsTransaction(transaction) {
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if (this.state === Miner.STATE_RUNNING && this.mining[0].find(t => t.id === transaction.id)) {
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this.state = Miner.STATE_INTERRUPTED;
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}
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}
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interruptIfContainsMetadata(metadata) {
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if (this.state === Miner.STATE_RUNNING && this.mining[1].find(t => t.id === metadata.id)) {
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this.state = Miner.STATE_INTERRUPTED;
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}
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}
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startMine() {
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//only continue if state is waiting or restarting
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if (this.state !== Miner.STATE_WAITING && this.state !== Miner.STATE_RESTARTING) {
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return;
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}
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mine() {
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const validTransactions = this.transactionPool.validTransactions();
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const validMetadataS = this.transactionPool.validMetadataS();
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if (validTransactions.length === 0 && validMetadataS.length === 0) {
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this.state = Miner.STATE_WAITING;
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return;
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}
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validTransactions.push(
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Transaction.rewardTransaction(this.wallet, Wallet.blockchainWallet())
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);
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console.log(validTransactions);
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console.log("//////");
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const validMetadataS = this.transactionPool.validMetadataS();
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// for (let i =0; i <validMetadataS.length; i++){
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// validTransactions.push(validMetadataS[i]);
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// }
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console.log(validTransactions);
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// const validMetadataS = this.transactionPool.metadataS;
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const block = this.blockchain.addBlock([validTransactions, validMetadataS]);
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this.p2pServer.newBlock(block);
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this.transactionPool.clear();
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return block;
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this.lastBlock = this.blockchain.chain[this.blockchain.chain.length - 1];
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this.state = Miner.STATE_RUNNING;
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this.mining = [validTransactions, validMetadataS];
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this.nonce = 0;
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this.mine();
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}
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mine() {
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if (this.state !== Miner.STATE_RUNNING) {
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this.state = Miner.STATE_RESTARTING;
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startMine();
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return;
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}
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const timestamp = Date.now();
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const difficulty = Block.adjustDifficulty(this.lastBlock, timestamp);
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const hash = Block.hash(timestamp, this.lastBlock.hash, this.mining, this.nonce, difficulty);
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if (hash.substring(0, difficulty) === '0'.repeat(difficulty)) {
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//success
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this.p2pServer.newBlock(new Block(timestamp, this.lastBlock.hash, hash, this.mining, this.nonce, difficulty));
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this.state = Miner.STATE_RESTARTING;
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setImmediate(() => { this.startMine() });
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} else {
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//failure
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this.nonce++;
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setImmediate(() => { this.mine() });
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}
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}
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}
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@ -1,9 +1,12 @@
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const Websocket = require('ws');
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const N3 = require('n3');
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const parser = new N3.Parser(); //({format: 'application/n-quads'});
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const DataFactory = require('n3').DataFactory;
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const fs = require('fs');
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const process = require('process');
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const Miner = require('./miner');
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const Transaction = require('../wallet/transaction');
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const TransactionPool = require('../wallet/transaction-pool');
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const Metadata = require('../wallet/metadata');
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const P2P_PORT = process.env.P2P_PORT || 5000;
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const peers = process.env.PEERS ? process.env.PEERS.split(',') : [];
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@ -15,12 +18,13 @@ const MESSAGE_TYPES = {
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};
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class P2pServer {
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constructor(blockchain, transactionPool,chainStorageLocation) {
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constructor(blockchain, transactionPool, wallet, chainStorageLocation) {
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this.blockchain = blockchain;
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this.transactionPool = transactionPool;
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this.sockets = [];
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this.store = new N3.Store();
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this.chainStorageLocation = chainStorageLocation;
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this.miner = new Miner(this.blockchain, this.transactionPool, wallet, this);
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//possible race if deleted after check, but we live with it I guess
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if (fs.existsSync(this.chainStorageLocation)) {
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@ -63,39 +67,93 @@ class P2pServer {
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const data = JSON.parse(message);
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switch(data.type) {
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case MESSAGE_TYPES.chain:
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newChain(data.chain);
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this.newChain(data.chain);
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break;
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case MESSAGE_TYPES.transaction:
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this.transactionPool.updateOrAddTransaction(data.transaction);
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this.newTransaction(data.transaction, false);
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break;
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case MESSAGE_TYPES.metadata:
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this.transactionPool.updateOrAddMetadata(data.metadata);
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break;
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case MESSAGE_TYPES.clear_transactions:
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this.transactionPool.clear();
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this.newMetadata(data.metadata, false);
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break;
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//case MESSAGE_TYPES.clear_transactions:
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// this.transactionPool.clear();
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// break;
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}
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});
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}
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newBlock(block) {
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this.onNewBlock(block.data);
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this.syncChains();
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this.persistChain(this.blockchain.chain);
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newMetadata(metadata, broadcast) {
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if (!Metadata.verifyMetadata(metadata)) {
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console.log("Couldn't add metadata to p2pServer, couldn't verify");
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return;
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}
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switch (this.transactionPool.updateOrAddMetadata(metadata)) {
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case TransactionPool.Return.add:
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this.miner.startMine();
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break;
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case TransactionPool.Return.update:
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this.miner.interruptIfContainsMetadata(metadata);
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break;
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case TransactionPool.Return.error:
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console.log("Couldn't add metadata to p2pServer, couldn't updateOrAdd");
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return;
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}
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if (broadcast === undefined || broadcast) {
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this.broadcastMetadata(metadata);
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}
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}
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newChain(chain,persist) {
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if (!this.blockchain.replaceChain(chain)) {
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newTransaction(transaction, broadcast) {
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if (!Transaction.verifyTransaction(transaction)) {
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console.log("Couldn't add transaction to p2pServer, couldn't verify");
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return false;
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}
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switch (this.transactionPool.updateOrAddTransaction(transaction)) {
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case TransactionPool.Return.add:
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this.miner.startMine();
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break;
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case TransactionPool.Return.update:
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this.miner.interruptIfContainsTransaction(transaction);
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break;
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case TransactionPool.Return.error:
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console.log("Couldn't add transaction to p2pServer, couldn't updateOrAdd");
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return;
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}
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if (broadcast === undefined || broadcast) {
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this.broadcastTransaction(transaction);
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}
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}
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newBlock(block) {
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if (!this.blockchain.addBlock(block)) {
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//invalid block, return
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return;
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}
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this.onNewBlock(block);
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this.persistChain(this.blockchain.chain);
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this.syncChains();
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}
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newChain(chain, persist) {
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const oldChain = this.blockchain.chain;
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const divergence = this.blockchain.replaceChain(chain);
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if (divergence === null) {
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//failed to replace
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return;
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}
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if (typeof persist === "undefined" || persist) {
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this.persistChain(chain);
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}
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//dirty clear
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this.store = new N3.Store();
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for (var block in this.blockchain.chain) {
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||||
this.onNewBlock(block);
|
||||
for (let i = divergence; i < oldChain.length; i++) {
|
||||
this.store.deleteGraph(oldChain[i].hash);
|
||||
}
|
||||
for (let i = divergence; i < this.blockchain.chain.length; i++) {
|
||||
this.onNewBlock(this.blockchain.chain[i]);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -112,28 +170,36 @@ class P2pServer {
|
|||
|
||||
onNewBlock(block) {
|
||||
//block data is of form [transactions,metadatas]
|
||||
if (block.length != 2) {
|
||||
if (block.data.length != 2) {
|
||||
//assert?
|
||||
return;
|
||||
}
|
||||
const metadatas = block[1];
|
||||
|
||||
for (var metadata in metadatas) {
|
||||
if (!(SSNmetadata in metadata)) {
|
||||
this.transactionPool.clearFromBlock(block);
|
||||
|
||||
this.miner.interrupt();
|
||||
|
||||
const metadatas = block.data[1];
|
||||
|
||||
for (const metadata of metadatas) {
|
||||
if (!("SSNmetadata" in metadata)) {
|
||||
//assert?
|
||||
return;
|
||||
}
|
||||
|
||||
var ssn = metadata.SSNmetadata;
|
||||
|
||||
const parser = new N3.Parser();
|
||||
|
||||
parser.parse(
|
||||
ssn,
|
||||
(error, quadN, prefixes) => {
|
||||
if (quadN) {
|
||||
store.addQuad(DataFactory.quad(
|
||||
this.store.addQuad(DataFactory.quad(
|
||||
DataFactory.namedNode(quadN.subject.id),
|
||||
DataFactory.namedNode(quadN.predicate.id),
|
||||
DataFactory.namedNode(quadN.object.id)));
|
||||
DataFactory.namedNode(quadN.object.id),
|
||||
DataFactory.namedNode(block.hash)));
|
||||
}
|
||||
});
|
||||
}
|
||||
|
|
@ -163,13 +229,13 @@ class P2pServer {
|
|||
this.sockets.forEach(socket => this.sendChain(socket));
|
||||
}
|
||||
|
||||
//broadcastTransaction(transaction) {
|
||||
// this.sockets.forEach(socket => this.sendTransaction(socket, transaction));
|
||||
//}
|
||||
broadcastTransaction(transaction) {
|
||||
this.sockets.forEach(socket => this.sendTransaction(socket, transaction));
|
||||
}
|
||||
|
||||
//broadcastMetadata(metadata) {
|
||||
// this.sockets.forEach(socket => this.sendMetadata(socket, metadata));
|
||||
//}
|
||||
broadcastMetadata(metadata) {
|
||||
this.sockets.forEach(socket => this.sendMetadata(socket, metadata));
|
||||
}
|
||||
|
||||
//broadcastClearTransactions() {
|
||||
// this.sockets.forEach(socket => socket.send(JSON.stringify({
|
||||
|
|
|
|||
|
|
@ -8,7 +8,11 @@ class Block {
|
|||
this.hash = hash;
|
||||
this.data = data;
|
||||
this.nonce = nonce;
|
||||
this.difficulty = difficulty || DIFFICULTY;
|
||||
if (difficulty === undefined) {
|
||||
this.difficulty = DIFFICULTY;
|
||||
} else {
|
||||
this.difficulty = difficulty;
|
||||
}
|
||||
}
|
||||
|
||||
toString() {
|
||||
|
|
@ -24,26 +28,20 @@ class Block {
|
|||
static genesis() {
|
||||
return new this('Genesis time', '-----', 'f1r57-h45h', [], 0, DIFFICULTY);
|
||||
}
|
||||
//we want this to eventually be continously running where there are things in the pool,
|
||||
//however as node is single threaded, this almost has to be a fiber, and yield after every
|
||||
//other iteration to allow for meaningful forward progress
|
||||
|
||||
//we can either add all new transactions into the block as we see them, or stay with the starting list, idk which
|
||||
//to be done later
|
||||
static mineBlock(lastBlock, data) {
|
||||
let hash, timestamp;
|
||||
const lastHash = lastBlock.hash;
|
||||
let { difficulty } = lastBlock;
|
||||
let nonce = 0;
|
||||
//returns false if hash doesn't match
|
||||
static checkHash(hash, timestamp, lastHash, data, nonce, difficulty) {
|
||||
const computedHash = Block.hash(timestamp, lastHash, data, nonce, difficulty);
|
||||
|
||||
do {
|
||||
nonce++;
|
||||
timestamp = Date.now();
|
||||
difficulty = Block.adjustDifficulty(lastBlock, timestamp);
|
||||
hash = Block.hash(timestamp, lastHash, data, nonce, difficulty);
|
||||
} while (hash.substring(0, difficulty) !== '0'.repeat(difficulty));
|
||||
if (computedHash !== hash) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return new this(timestamp, lastHash, hash, data, nonce, difficulty);
|
||||
if (hash.substring(0, difficulty) !== '0'.repeat(difficulty)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static hash(timestamp, lastHash, data, nonce, difficulty) {
|
||||
|
|
@ -55,11 +53,16 @@ class Block {
|
|||
return Block.hash(timestamp, lastHash, data, nonce, difficulty);
|
||||
}
|
||||
|
||||
//returns false if block's hash doesn't match internals
|
||||
static checkBlock(block) {
|
||||
return Block.checkHash(block.hash, block.timestamp, block.lastHash, block.data, block.nonce, block.difficulty);
|
||||
}
|
||||
|
||||
static adjustDifficulty(lastBlock, currentTime) {
|
||||
let { difficulty } = lastBlock;
|
||||
difficulty = lastBlock.timestamp + MINE_RATE > currentTime ?
|
||||
difficulty + 1 : difficulty - 1;
|
||||
return difficulty;
|
||||
return Math.max(0, difficulty);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -5,15 +5,37 @@ class Blockchain {
|
|||
this.chain = [Block.genesis()];
|
||||
}
|
||||
|
||||
addBlock(data) {
|
||||
const block = Block.mineBlock(this.chain[this.chain.length-1], data);
|
||||
this.chain.push(block);
|
||||
//adds an existing block to the blockchain, returns false if the block can't be added, true if it was added
|
||||
addBlock(newBlock) {
|
||||
if (newBlock.lastHash !== this.chain[this.chain.length - 1].hash) {
|
||||
console.log("Tried to add invalid block, last hash didn't match our last hash");
|
||||
return false;
|
||||
}
|
||||
//how to check if new block's timestamp is believable
|
||||
if (newBlock.difficulty !== Block.adjustDifficulty(this.chain[this.chain.length - 1], newBlock.timestamp)) {
|
||||
console.log("Tried to add invalid block, difficulty is incorrect");
|
||||
return false;
|
||||
}
|
||||
if (!Block.checkBlock(newBlock)) {
|
||||
console.log("Tried to add invalid block, block's hash doesn't match its contents");
|
||||
return false;
|
||||
}
|
||||
|
||||
return block;
|
||||
this.chain.push(newBlock);
|
||||
|
||||
console.log("Added new block: ");
|
||||
//console.log(newBlock);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
isValidChain(chain) {
|
||||
if(JSON.stringify(chain[0]) !== JSON.stringify(Block.genesis())) return false;
|
||||
if (chain.length === 0) {
|
||||
return false;
|
||||
}
|
||||
if (JSON.stringify(chain[0]) !== JSON.stringify(Block.genesis())) {
|
||||
return false;
|
||||
}
|
||||
|
||||
for (let i=1; i<chain.length; i++) {
|
||||
const block = chain[i];
|
||||
|
|
@ -23,12 +45,15 @@ class Blockchain {
|
|||
block.hash !== Block.blockHash(block)) {
|
||||
return false;
|
||||
}
|
||||
if (!Block.checkBlock(block)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
//return false on failure, true on success
|
||||
//return null on fail, returns the index of where they differ
|
||||
replaceChain(newChain) {
|
||||
if (newChain.length <= this.chain.length) {
|
||||
console.log('Received chain is not longer than the current chain.');
|
||||
|
|
@ -39,8 +64,18 @@ class Blockchain {
|
|||
}
|
||||
|
||||
console.log('Replacing blockchain with the new chain.');
|
||||
|
||||
const oldChain = this.chain;
|
||||
this.chain = newChain;
|
||||
return true;
|
||||
|
||||
//find where they differ
|
||||
for (let i = 1; i < oldChain.length; ++i) {
|
||||
if (oldChain[i].hash !== newChain[i].hash) {
|
||||
return i;
|
||||
}
|
||||
}
|
||||
//if they didn't differ in the length of the old chain, must be one after
|
||||
return oldChain.length;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,12 +1,12 @@
|
|||
const ChainUtil = require('../chain-util');
|
||||
const Transaction = require('./transaction');
|
||||
const { INITIAL_BALANCE } = require('../config');
|
||||
const Metadata = require('./metadata');
|
||||
const ChainUtil = require('../chain-util');
|
||||
|
||||
class Wallet {
|
||||
constructor() {
|
||||
constructor(keyPair) {
|
||||
this.balance = INITIAL_BALANCE;
|
||||
this.keyPair = ChainUtil.genKeyPair();
|
||||
this.keyPair = keyPair;
|
||||
this.publicKey = this.keyPair.getPublic().encode('hex');
|
||||
}
|
||||
|
||||
|
|
@ -25,36 +25,16 @@ class Wallet {
|
|||
|
||||
if (amount > this.balance) {
|
||||
console.log(`Amount: ${amount} exceceds current balance: ${this.balance}`);
|
||||
return;
|
||||
return null;
|
||||
}
|
||||
|
||||
let transaction = transactionPool.existingTransaction(this.publicKey);
|
||||
|
||||
if (transaction) {
|
||||
transaction.update(this, recipient, amount);
|
||||
} else {
|
||||
transaction = Transaction.newTransaction(this, recipient, amount);
|
||||
transactionPool.updateOrAddTransaction(transaction);
|
||||
}
|
||||
|
||||
return transaction;
|
||||
return Transaction.newTransaction(this, recipient, amount);
|
||||
}
|
||||
|
||||
createMetadata(SSNmetadata, transactionPool){
|
||||
//let metadata = transactionPool.existingMetadata(this.publicKey);
|
||||
createMetadata(SSNmetadata) {
|
||||
return Metadata.newMetadata(this, SSNmetadata);
|
||||
}
|
||||
|
||||
// if (metaData) {
|
||||
// metadata.update(this, Geo, Std, Name,MetaHash,file);
|
||||
// } else {*/
|
||||
|
||||
let metadata= Metadata.newMetadata(this, SSNmetadata);
|
||||
transactionPool.AddMetadata(metadata);
|
||||
|
||||
//}
|
||||
return metadata;
|
||||
}
|
||||
|
||||
|
||||
calculateBalance(blockchain) {
|
||||
let balance = this.balance;
|
||||
let transactions = [];
|
||||
|
|
@ -93,7 +73,7 @@ class Wallet {
|
|||
}
|
||||
|
||||
static blockchainWallet() {
|
||||
const blockchainWallet = new this();
|
||||
const blockchainWallet = new this(ChainUtil.genKeyPair());
|
||||
blockchainWallet.address = 'blockchain-wallet';
|
||||
return blockchainWallet;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,29 +1,50 @@
|
|||
const Transaction = require('../wallet/transaction');
|
||||
const Metadata = require('../wallet/metadata')
|
||||
const Metadata = require('../wallet/metadata')
|
||||
|
||||
const Return = {
|
||||
add: 1,
|
||||
update: 2,
|
||||
error: 3
|
||||
};
|
||||
|
||||
class TransactionPool {
|
||||
constructor() {
|
||||
this.transactions = [];
|
||||
this.metadataS =[];
|
||||
}
|
||||
|
||||
//returns true on update, false on add
|
||||
updateOrAddTransaction(transaction) {
|
||||
let transactionWithId = this.transactions.find(t => t.id === transaction.id);
|
||||
if (!Transaction.verifyTransaction(transaction)) {
|
||||
console.log("Couldn't update or add transaction, transaction couldn't be verified");
|
||||
return Return.error;
|
||||
}
|
||||
const foundIndex = this.transactions.findIndex(t => t.id === transaction.id);
|
||||
|
||||
if (transactionWithId) {
|
||||
this.transactions[this.transactions.indexOf(transactionWithId)] = transaction;
|
||||
if (foundIndex !== -1) {
|
||||
this.transactions[foundIndex] = transaction;
|
||||
return Return.update;
|
||||
} else {
|
||||
this.transactions.push(transaction);
|
||||
return Return.add;
|
||||
}
|
||||
}
|
||||
|
||||
AddMetadata(metadata) {
|
||||
// let metadataWithId = this.metadataS.find(t => t.id === metadata.id);
|
||||
updateOrAddMetadata(metadata) {
|
||||
if (!Metadata.verifyMetadata(metadata)) {
|
||||
console.log("Couldn't update metdata, metadata couldn't be verified");
|
||||
return Return.error;
|
||||
}
|
||||
|
||||
// if (metadataWithId) {
|
||||
// this.metaDataS[this.metadataS.indexOf(metadataWithId)] = metadata;
|
||||
// } else {
|
||||
const foundIndex = this.metadataS.findIndex(t => t.id === metadata.id);
|
||||
|
||||
if (foundIndex !== -1) {
|
||||
this.metadataS[foundIndex] = metadata;
|
||||
return Return.update;
|
||||
} else {
|
||||
this.metadataS.push(metadata);
|
||||
// }
|
||||
return Return.add;
|
||||
}
|
||||
}
|
||||
|
||||
existingTransaction(address) {
|
||||
|
|
@ -64,10 +85,31 @@ class TransactionPool {
|
|||
});
|
||||
}
|
||||
|
||||
clear() {
|
||||
clearFromBlock(block) {
|
||||
const transactions = block.data[0];
|
||||
const metadatas = block.data[1];
|
||||
for (const transaction of transactions) {
|
||||
const foundTransaction = this.transactions.findIndex(t => t.id === transaction.id);
|
||||
|
||||
if (foundTransaction !== -1) {
|
||||
this.transactions.splice(foundTransaction, 1);
|
||||
}
|
||||
}
|
||||
|
||||
for (const metadata of metadatas) {
|
||||
const foundMetadata = this.metadataS.findIndex(m => m.id === metadata.id);
|
||||
|
||||
if (foundMetadata !== -1) {
|
||||
this.metadataS.splice(foundMetadata, 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
clearAll() {
|
||||
this.transactions = [];
|
||||
this.metadataS = [];
|
||||
}
|
||||
}
|
||||
|
||||
module.exports = TransactionPool;
|
||||
module.exports = TransactionPool;
|
||||
module.exports.Return = Return;
|
||||
Loading…
Add table
Add a link
Reference in a new issue