Add block-sync to application.
This commit is contained in:
Spencer Ofwiti
319
src/assets/js/bancor/registry.js
Normal file
319
src/assets/js/bancor/registry.js
Normal file
@@ -0,0 +1,319 @@
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import Web3 from "web3";
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if (Web3 === undefined) {
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Web3 = require('web3');
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}
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// TODO: Load these from json external source
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const abis = {
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bancor: {
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'network':[
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],
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'contract_registry': [
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{
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"inputs": [
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{
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"internalType": "bytes32",
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"name": "_contractName",
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"type": "bytes32"
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}
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],
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"name": "getAddress",
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"outputs": [
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{
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"internalType": "address",
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"name": "",
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"type": "address"
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}
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],
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"stateMutability": "view",
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"type": "function",
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"constant": true
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}
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],
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'converter_registry': [
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{
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"inputs": [],
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"name": "getConvertibleTokens",
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"outputs": [
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{
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"internalType": "address[]",
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"name": "",
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"type": "address[]"
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}
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],
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"stateMutability": "view",
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"type": "function",
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"constant": true
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},
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],
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},
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common: {
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'erc20': [
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{
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"inputs": [
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{
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"internalType": "address",
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"name": "",
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"type": "address"
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}
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],
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"name": "balanceOf",
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"outputs": [
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{
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"internalType": "uint256",
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"name": "",
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"type": "uint256"
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}
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],
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"stateMutability": "view",
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"type": "function",
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"constant": true
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},
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{
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"inputs": [],
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"name": "decimals",
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"outputs": [
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{
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"internalType": "uint8",
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"name": "",
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"type": "uint8"
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}
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],
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"stateMutability": "view",
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"type": "function",
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"constant": true
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},
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{
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"inputs": [],
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"name": "name",
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"outputs": [
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{
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"internalType": "string",
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"name": "",
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"type": "string"
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}
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],
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"stateMutability": "view",
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"type": "function",
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"constant": true
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},
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{
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"inputs": [],
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"name": "symbol",
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"outputs": [
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{
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"internalType": "string",
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"name": "",
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"type": "string"
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}
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],
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"stateMutability": "view",
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"type": "function",
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"constant": true
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},
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]
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}
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};
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const topics = {
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erc20: {
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'transfer': '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
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'convert': '0x7154b38b5dd31bb3122436a96d4e09aba5b323ae1fd580025fab55074334c095'
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}
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};
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function Token(address, name, symbol) {
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let self = this;
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self.address = address;
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self.name = name;
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self.symbol = symbol;
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}
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Token.prototype.toString = function() {
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let self = this;
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return 'Token: ' + self.name + ' (' + self.symbol + ')';
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}
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export function Registry(w3, address) {
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let self = this;
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self.w3 = w3;
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self.contracts = {
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'bancor_contract_registry': new self.w3.eth.Contract(abis.bancor['contract_registry'], address),
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};
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self.contracts_r = {};
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self.contracts_r[address] = self.contracts['bancor_contract_registry'];
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self.tokens = [];
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self.tokens_s = {};
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self.tokens_r = {};
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self.init = {
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network: [1, 3], // current index, target index
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tokens: [0, -1], // current index, target index
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}
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self.ontokensload= function(n) {
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console.debug('tokens loaded', n);
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}
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self.onregistryload= function() {
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console.debug('registry loaded');
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}
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}
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Registry.prototype.load = async function() {
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console.debug('loading registry');
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let self = this;
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const cr = self.contracts['bancor_contract_registry'];
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let crid_hex = self.w3.utils.toHex('BancorConverterRegistry');
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let shaid = self.w3.eth.abi.encodeParameter('bytes32', crid_hex)
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cr.methods.getAddress(shaid).call().then((address) => {
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self.contracts['bancor_converter_registry'] = new self.w3.eth.Contract(abis.bancor['converter_registry'], address);
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self.contracts_r[address] = self.contracts['bancor_converter_registry'];
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console.log('bancor converter registry', address);
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self.load_tokens();
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self.init.network[0]++;
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if (self.init.network[0] == self.init.network[1]) {
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self.onregistryload(self.init.network[0]);
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}
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});
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crid_hex = self.w3.utils.toHex('BancorNetwork');
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shaid = self.w3.eth.abi.encodeParameter('bytes32', crid_hex)
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cr.methods.getAddress(shaid).call().then((address) => {
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self.contracts['bancor_network'] = new self.w3.eth.Contract(abis.bancor['network'], address);
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self.contracts_r[address] = self.contracts['bancor_network'];
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console.log('bancor network', address);
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self.init.network[0]++;
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if (self.init.network[0] == self.init.network[1]) {
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self.onregistryload(self.init.network[0]);
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}
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});
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};
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Registry.prototype.load_tokens = async function() {
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console.debug('loading tokens');
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let self = this;
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const cr = self.contracts['bancor_converter_registry'];
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cr.methods.getConvertibleTokens().call().then(async (addresses) => {
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self.init.tokens[1] = addresses.length;
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for (const address of addresses) {
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await self.add_token(address);
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console.debug('l ', self.tokens.length, addresses.length);
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if (self.tokens.length === addresses.length) {
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// self.onload();
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}
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}
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});
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};
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Registry.prototype.add_token = async function(address) {
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let self = this;
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const ct = new self.w3.eth.Contract(abis.common['erc20'], address);
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const symbol = await ct.methods.symbol().call();
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const name = await ct.methods.name().call();
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const t = new Token(address, symbol, name);
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const ti = self.tokens.length;
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self.tokens.push(t);
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self.tokens[t.symbol] = self.tokens[ti];
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self.tokens_r[address] = self.tokens[ti];
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self.init.tokens[0]++;
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console.log('added token', t.toString(), ti, address);
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if (self.init.tokens[0] == self.init.tokens[1]) {
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self.ontokenload(self.init.tokens[0]);
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}
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};
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function Tx(block, tx_index, tx_hash, timestamp, success) {
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let self = this;
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self.block = block;
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self.txIndex = tx_index;
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self.txHash = tx_hash;
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self.timestamp = timestamp;
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self.success = success;
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}
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function Transfer(tx, token, from, to, value, timestamp, block, transaction) {
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let self = this;
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self.from = from;
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self.to = to;
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self.token = token;
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self.value = value;
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self.tx = tx;
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}
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function Conversion(tx, sourceToken, destinationToken, trader, fromValue, toValue) {
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let self = this;
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self.sourceToken = sourceToken;
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self.destinationToken = destinationToken;
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self.trader = trader;
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self.fromValue = fromValue;
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self.toValue = toValue;
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self.tx = tx;
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}
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export function TransactionHelper(w3, registry) {
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let self = this;
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self.registry = registry;
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self.w3 = w3;
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self.ontransfer = (t) => {
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console.debug('transfer ', t);
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}
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self.onconversion = (c) => {
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console.debug('convert ', c);
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}
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}
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TransactionHelper.prototype.processTokenTransactionLog = async function(success, t, log) {
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let self = this;
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if (log.topics[0] == topics.erc20['transfer']) {
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const block = await self.w3.eth.getBlock(log.blockNumber);
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const from = self.w3.utils.toChecksumAddress(log.topics[1].substring(26, 66));
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const to = self.w3.utils.toChecksumAddress(log.topics[2].substring(26, 66));
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const value = self.w3.utils.hexToNumber(log.data);
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const tx = new Tx(log.blockNumber, log.transactionIndex, log.transactionHash, block.timestamp, success);
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const transfer = new Transfer(tx, t, from, to, value);
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self.ontransfer(transfer);
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}
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}
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TransactionHelper.prototype.processConvertTransactionLog = async function(success, log) {
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let self = this;
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if (log.topics[0] == topics.erc20['convert']) {
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const block = await self.w3.eth.getBlock(log.blockNumber);
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const sourceToken_address = self.w3.utils.toChecksumAddress('0x' + log.topics[1].substring(26, 66));
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const sourceToken = self.registry.tokens_r[sourceToken_address];
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const destinationToken_address = self.w3.utils.toChecksumAddress('0x' + log.topics[2].substring(26, 66));
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const destinationToken = self.registry.tokens_r[destinationToken_address];
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const fromValue = self.w3.utils.hexToNumber(log.data.substring(0, 66));
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const toValue = self.w3.utils.hexToNumber('0x' + log.data.substring(66, 130));
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const trader = self.w3.utils.toChecksumAddress('0x' + log.data.substring(154));
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const tx = new Tx(log.blockNumber, log.transactionIndex, log.transactionHash, block.timestamp, success);
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const cv = new Conversion(tx, sourceToken, destinationToken, trader, fromValue, toValue);
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self.onconversion(cv);
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}
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}
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TransactionHelper.prototype.processReceipt = async function(r) {
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let self = this;
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const logs = r.logs;
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for (let i = 0; i < logs.length; i++) {
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const contract_address = logs[i].address;
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const t = self.registry.tokens_r[contract_address];
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if (t !== undefined) {
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self.processTokenTransactionLog(r.status, t, logs[i]);
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} else {
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if (self.registry.contracts_r[contract_address] !== undefined) {
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self.processConvertTransactionLog(r.status, logs[i]);
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}
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}
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}
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}
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168
src/assets/js/moolb.js
Normal file
168
src/assets/js/moolb.js
Normal file
@@ -0,0 +1,168 @@
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let crypto = undefined;
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(function() {
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if (typeof module !== 'undefined' && typeof exports !== 'undefined') {
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const nodeCrypto = require('crypto');
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function hashWrapper(nodeCrypto, alg) {
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this.alg = alg;
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this.crypto = nodeCrypto.createHash(alg);
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}
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hashWrapper.prototype.update = function(d) {
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this.crypto.update(d);
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}
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hashWrapper.prototype.digest = async function() {
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const z = this.crypto.digest(this.data);
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return new Uint8Array(z);
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}
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function cryptoWrapper(nodeCrypto) {
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this.crypto = nodeCrypto
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}
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cryptoWrapper.prototype.createHash = function(alg) {
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return new hashWrapper(this.crypto, alg);
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}
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module.exports = {
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Bloom: Bloom,
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fromBytes: fromBytes,
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};
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crypto = new cryptoWrapper(nodeCrypto);
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} else {
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function hashWrapper(webCrypto, alg) {
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this.alg = alg;
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this.crypto = webCrypto;
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this.data = undefined;
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}
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hashWrapper.prototype.update = function(d) {
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if (this.data != undefined) {
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throw "cannot append";
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}
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this.data = d;
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}
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hashWrapper.prototype.digest = async function() {
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const z = await this.crypto.subtle.digest('SHA-256', this.data);
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return new Uint8Array(z);
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}
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function cryptoWrapper(webCrypto) {
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this.crypto = webCrypto
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}
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cryptoWrapper.prototype.createHash = function(alg) {
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return new hashWrapper(this.crypto, alg);
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}
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crypto = new cryptoWrapper(window.crypto);
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window.Bloom = Bloom;
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window.bloomFromBytes = fromBytes;
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}
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})()
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// block numbers 6000000
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// false positive probability 2%
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//
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// m = ceil((n * log(p)) / log(1 / pow(2, log(2))));
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// m = ceil((6000000 * log(0.1)) / log(1 / pow(2, log(2))))
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// = 3917675
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// Creates a new bloom object.
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// \param size of filter in bits, aligned to byte boundary
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// \param number of rounds to hash
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// \param hasher function, which must take two Uint8Array parameters 'data' and 'salt'. If not sef, hashBloomDefault will be used.
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function Bloom(bits, rounds, hasher) {
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this.bits = bits;
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this.bytes = parseInt(bits / 8, 10);
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this.rounds = rounds;
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if (this.hasher === undefined) {
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this.hasher = hashBloomDefault;
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}
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if (this.bytes * 8 != this.bits) {
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console.error('number of bits must be on byte boundary');
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return false;
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} else {
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this.filter = new Uint8Array(this.bytes);
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}
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}
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// add entry to bloom filter
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// \param value to add
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Bloom.prototype.add = async function(v) {
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let a = new ArrayBuffer(v.byteLength + 4);
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let iw = new DataView(a);
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for (let i = 0; i < v.byteLength; i++) {
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iw.setUint8(i, v[i]);
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}
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//console.debug(iw, v);
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for (var i = 0; i < this.rounds; i++) {
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iw.setInt32(v.byteLength, i);
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let result = await this.hasher(iw);
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let resultHex = Array.prototype.map.call(new Uint8Array(result), x => ('00' + x.toString(16)).slice(-2)).join('');
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let resultInt = parseInt(BigInt('0x'+resultHex) % BigInt(this.bits), 10);
|
||||
let bytepos = parseInt(resultInt / 8, 10);
|
||||
let bitpos = parseInt(resultInt, 10) % 8;
|
||||
this.filter[bytepos] |= 1 << bitpos;
|
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//console.log("setpos ", bytepos, bitpos);
|
||||
}
|
||||
};
|
||||
|
||||
// checks if the block number has been added to the bloom filter
|
||||
// \param value to check for
|
||||
// \return false if not found in filter
|
||||
Bloom.prototype.check = async function(v) {
|
||||
let a = new ArrayBuffer(v.byteLength + 4);
|
||||
let iw = new DataView(a);
|
||||
for (let i = 0; i < v.byteLength; i++) {
|
||||
iw.setUint8(i, v[i]);
|
||||
}
|
||||
for (let j = 0; j < this.filter.byteLength; j++) {
|
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if (v[3] == 20 && this.filter[j] > 0) {
|
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console.log('filter ', j, this.filter[j]);
|
||||
}
|
||||
}
|
||||
for (let i = 0; i < this.rounds; i++) {
|
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iw.setInt32(v.byteLength, i);
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||||
let result = await this.hasher(iw);
|
||||
//console.log('result', result);
|
||||
let resultHex = Array.prototype.map.call(new Uint8Array(result), x => ('00' + x.toString(16)).slice(-2)).join('');
|
||||
let resultInt = parseInt(BigInt('0x'+resultHex) % BigInt(this.bits), 10);
|
||||
let bytepos = parseInt(resultInt / 8, 10);
|
||||
//console.log("setpos ", v, bytepos, resultInt % 8);
|
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if (this.filter[bytepos] === undefined) {
|
||||
console.error('byte pos ' + bytepos + ' is undefined (filter length ' + this.filter.byteLength + ')');
|
||||
return false;
|
||||
} else {
|
||||
let test = 1 << (0xff & (resultInt % 8));
|
||||
if (v[3] == 20) {
|
||||
console.log('test', test, bytepos, resultInt % 8);
|
||||
}
|
||||
if ((this.filter[bytepos] & test) == 0) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
};
|
||||
|
||||
// return the verbatim filter
|
||||
// \return Uint8Array filter
|
||||
Bloom.prototype.bytes = function() {
|
||||
return this.filter;
|
||||
};
|
||||
|
||||
|
||||
// Default hashing function used in Bloom.add() - sha256
|
||||
// \param data to insert in filter
|
||||
// \param salt, typically a sequence number
|
||||
// \return Uint8Array digest
|
||||
async function hashBloomDefault(data, salt) {
|
||||
const h = crypto.createHash('sha256');
|
||||
h.update(data);
|
||||
const z = await h.digest();
|
||||
return Uint8Array.from(z);
|
||||
}
|
||||
|
||||
function fromBytes(bytes, rounds, hasher) {
|
||||
const bits = bytes.byteLength * 8;
|
||||
let b = new Bloom(bits, rounds, hasher);
|
||||
b.filter = bytes;
|
||||
return b;
|
||||
}
|
||||
31
src/assets/js/plugin.js
Normal file
31
src/assets/js/plugin.js
Normal file
@@ -0,0 +1,31 @@
|
||||
export function fetcher(settings) {
|
||||
let xhr = new XMLHttpRequest();
|
||||
xhr.responseType = 'json';
|
||||
xhr.open('GET', 'http://localhost:5555/tx/0/100');
|
||||
xhr.addEventListener('load', async (e) => {
|
||||
const d = xhr.response;
|
||||
|
||||
//const digest = await crypto.subtle.digest('SHA-256', ArrayBuffer.from(d.block_filter))
|
||||
//console.log('block filter digest', digest)
|
||||
|
||||
const block_filter_binstr = window.atob(d.block_filter);
|
||||
let b_one = new Uint8Array(block_filter_binstr.length);
|
||||
b_one.map(function(e, i, v) {
|
||||
v[i] = block_filter_binstr.charCodeAt([i]);
|
||||
});
|
||||
|
||||
const blocktx_filter_binstr = window.atob(d.blocktx_filter);
|
||||
let b_two = new Uint8Array(blocktx_filter_binstr.length);
|
||||
b_two.map(function(e, i, v) {
|
||||
v[i] = blocktx_filter_binstr.charCodeAt([i]);
|
||||
});
|
||||
for (let i = 0; i < block_filter_binstr.length; i++) {
|
||||
if (b_one[i] > 0 ) {
|
||||
console.debug('blocktx value on', i);
|
||||
}
|
||||
}
|
||||
|
||||
settings.scanFilter(settings, d.low, d.high, b_one, b_two, d.filter_rounds)
|
||||
});
|
||||
xhr.send();
|
||||
}
|
||||
30
src/assets/js/sync.js
Normal file
30
src/assets/js/sync.js
Normal file
@@ -0,0 +1,30 @@
|
||||
function sync_by_filter_block(block, count, buf, bloom_blocktx, result_callback) {
|
||||
for (let j = 0; j < count; j++) {
|
||||
let w = new DataView(buf);
|
||||
w.setInt32(4, j);
|
||||
const r = new Uint8Array(buf);
|
||||
bloom_blocktx.check(r).then(function(ok) {
|
||||
if (ok) {
|
||||
console.debug('match in block' + block + ' tx ' + j);
|
||||
result_callback(block, j);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
function sync_by_filter(caller, lo, hi, bloom_block, bloom_blocktx, tx_count_getter, result_callback) {
|
||||
for (let i = lo; i <= hi; i++) {
|
||||
let a = new ArrayBuffer(8);
|
||||
let w = new DataView(a);
|
||||
w.setInt32(0, i);
|
||||
const r = new Uint8Array(a.slice(0, 4));
|
||||
bloom_block.check(r).then(function(ok) {
|
||||
if (ok) {
|
||||
console.debug('match in block ' + i);
|
||||
tx_count_getter(i).then(function(n) {
|
||||
sync_by_filter_block(i, n, a, bloom_blocktx, result_callback);
|
||||
});
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
1
src/assets/js/web3.min.js
vendored
Normal file
1
src/assets/js/web3.min.js
vendored
Normal file
File diff suppressed because one or more lines are too long
63
src/assets/js/worker.js
Normal file
63
src/assets/js/worker.js
Normal file
@@ -0,0 +1,63 @@
|
||||
let window = self;
|
||||
|
||||
importScripts('./moolb.js');
|
||||
importScripts('./sync.js');
|
||||
importScripts('./web3.min.js');
|
||||
|
||||
let s = undefined;
|
||||
|
||||
// TODO: as worker has its own scope we don't need the object
|
||||
function Driver(messager, provider, lo, filters, syncer) {
|
||||
this.w3 = new Web3(provider);
|
||||
this.lo = lo;
|
||||
this.hi = lo;
|
||||
this.filters = filters;
|
||||
this.syncer = syncer;
|
||||
this.messager = messager;
|
||||
}
|
||||
|
||||
Driver.prototype.start = function(hi) {
|
||||
let self = this;
|
||||
if (hi !== undefined) {
|
||||
self.sync(hi);
|
||||
return;
|
||||
}
|
||||
s.w3.eth.getBlockNumber().then(function(n) {
|
||||
self.sync(n);
|
||||
});
|
||||
};
|
||||
|
||||
Driver.prototype.sync = function(n) {
|
||||
this.hi = n;
|
||||
this.syncer(this, this.lo, this.hi, this.filters[0], this.filters[1], this.getCount, this.process);
|
||||
};
|
||||
|
||||
|
||||
Driver.prototype.process = function(b, t) {
|
||||
s.w3.eth.getTransactionFromBlock(b, t).then((t) => {
|
||||
s.w3.eth.getTransactionReceipt(t.hash).then((r) => {
|
||||
this.postMessage(r);
|
||||
});
|
||||
}).catch(function(e) {
|
||||
//this.postMessage(['failed getTransactionFromBlock(' + b + ', ' + t + ')']);
|
||||
console.error('failed getTransactionFromBlock(' + b + ', ' + t + ')');
|
||||
});
|
||||
}
|
||||
|
||||
Driver.prototype.getCount = async function (b) {
|
||||
const n = s.w3.eth.getBlockTransactionCount(b);
|
||||
return n;
|
||||
};
|
||||
|
||||
onmessage = function(o) {
|
||||
const filters = [
|
||||
bloomFromBytes(o.data.filters[0], o.data.filter_rounds),
|
||||
bloomFromBytes(o.data.filters[1], o.data.filter_rounds),
|
||||
];
|
||||
s = new Driver(postMessage, o.data.w3_provider, o.data.lo, filters, sync_by_filter);
|
||||
let hi = undefined;
|
||||
if (o.data.hi > 0) {
|
||||
hi = o.data.hi;
|
||||
}
|
||||
s.start(hi);
|
||||
};
|
||||
Reference in New Issue
Block a user