Reorganizing code
This commit is contained in:
Richard Ramos
parent
9432694fa3
commit
56879acc00
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@ -1,19 +1,17 @@
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{
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"blockchain": {
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"account": "0x9e14016ba37b23498885864053fded5226161a3a",
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"protocol": "ws",
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"host": "localhost",
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"port": 8545
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},
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"whisper": {
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"symKey": "0xd0d905c1c62b810b787141430417caf2b3f54cffadb395b7bb39fdeb8f17266b",
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"node": {
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"protocol": "ws",
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"host": "localhost",
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"port": 8546,
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"ttl": 20,
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"minPow": 0.8,
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"powTime": 1000
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"blockchain": {
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"account": "0x9e14016ba37b23498885864053fded5226161a3a"
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},
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"whisper": {
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"symKey": "0xd0d905c1c62b810b787141430417caf2b3f54cffadb395b7bb39fdeb8f17266b",
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"ttl": 20,
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"minPow": 0.8,
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"powTime": 1000
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}
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},
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"tokens": {
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@ -0,0 +1,111 @@
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const md5 = require('md5');
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class ContractSettings {
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constructor(config, web3, eventEmitter){
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this.tokens = config.tokens;
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this.topics = [];
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this.contracts = config.contracts;
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this.web3 = web3;
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this.events = eventEmitter;
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this.pendingToLoad = 0;
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this.events.on('setup:bytecode-address', this._obtainContractBytecode.bind(this))
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}
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process(){
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this._setTokenPricePlugin();
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this._processContracts();
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}
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getToken(token){
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return this.tokens[token];
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}
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getContractByTopic(topicName){
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return this.contracts[topicName];
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}
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getTopicName(contractName){
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return this.web3.utils.toHex(contractName).slice(0, 10);
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}
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_setTokenPricePlugin(){
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for(let token in this.tokens){
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if(this.tokens[token].pricePlugin !== undefined){
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let PricePlugin = require(this.tokens[token].pricePlugin);
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this.tokens[token].pricePlugin = new PricePlugin(this.tokens[token]);
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}
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}
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}
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_determineBytecodeAddress(topicName, i){
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let contractAddress = this.contracts[topicName].address;
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if(this.contracts[topicName].isIdentity){
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this.pendingToLoad++;
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const lastKernelSignature = "0x4ac99424"; // REFACTOR
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this.web3.eth.call({to: this.contracts[topicName].factoryAddress, data: lastKernelSignature})
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.then(kernel => {
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contractAddress = '0x' + kernel.slice(26);
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this.events.emit('setup:bytecode-address', topicName, contractAddress);
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})
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}
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}
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_obtainContractBytecode(topicName, contractAddress){
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this.web3.eth.getCode(contractAddress)
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.then(code => {
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this.contracts[topicName].code = md5(code);
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this.pendingToLoad--;
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if(this.pendingToLoad == 0) this.events.emit("setup:complete", this);
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})
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.catch(function(err){
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console.error("Invalid contract for " + contractName);
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console.error(err);
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process.exit();
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});
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}
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_extractFunctions(topicName){
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const contract = this.getContractByTopic(topicName);
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for(let i = 0; i < contract.allowedFunctions.length; i++){
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contract.allowedFunctions[i].functionName = contract.allowedFunctions[i].function.slice(0, contract.allowedFunctions[i].function.indexOf('('));
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// Extracting input
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contract.allowedFunctions[i].inputs = contract.abi.filter(x => x.name == contract.allowedFunctions[i].functionName && x.type == "function")[0].inputs;
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// Obtaining function signatures
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let functionSignature = this.web3.utils.sha3(contract.allowedFunctions[i].function).slice(0, 10);
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contract.allowedFunctions[functionSignature] = contract.allowedFunctions[i];
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delete this.contracts[topicName].allowedFunctions[i];
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}
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contract.functionSignatures = Object.keys(contract.allowedFunctions);
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this.contracts[topicName] = contract;
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}
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_processContracts(){
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for(let contractName in this.contracts){
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// Obtaining the abis
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this.contracts[contractName].abi = require(this.contracts[contractName].abiFile);
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const topicName = this.getTopicName(contractName);
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// Extracting topic
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this.topics.push(topicName);
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this.contracts[topicName] = this.contracts[contractName];
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this.contracts[topicName].name = contractName;
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delete this.contracts[contractName];
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this._determineBytecodeAddress(topicName);
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this._extractFunctions(topicName);
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}
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}
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}
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module.exports = ContractSettings;
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@ -0,0 +1,182 @@
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const md5 = require('md5');
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const erc20ABI = require('../abi/ERC20.json');
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const ganache = require("ganache-cli");
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class MessageProcessor {
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constructor(config, settings, web3, kId){
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this.config = config;
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this.settings = settings;
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this.web3 = web3;
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this.kId = kId;
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}
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_reply(text, message){
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if(message.sig !== undefined){
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this.web3.shh.post({
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pubKey: message.sig,
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sig: this.kId,
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ttl: this.config.node.whisper.ttl,
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powTarget:this.config.node.whisper.minPow,
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powTime: this.config.node.whisper.powTime,
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topic: message.topic,
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payload: this.web3.utils.fromAscii(text)
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}).catch(console.error);
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}
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}
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async _validateInput(message, input){
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const contract = this.settings.getContractByTopic(message.topic);
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if(!/^0x[0-9a-f]{40}$/i.test(input.address)){
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this._reply('Invalid address', message);
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return false;
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}
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if(contract == undefined){
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this._reply('Invalid topic', message);
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return false;
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}
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if(!contract.functionSignatures.includes(input.functionName)){
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this._reply('Function not allowed', message);
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return false;
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}
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// Get code from address and compare it against the contract code
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const code = md5(await this.web3.eth.getCode(input.address));
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if(code != contract.code){
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this._reply('Invalid contract code', message);
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return false;
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}
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return true;
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}
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_extractInput(message){
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return {
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address: message.payload.slice(0, 42),
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functionName: '0x' + message.payload.slice(42, 50),
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functionParameters: '0x' + message.payload.slice(50),
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payload: '0x' + message.payload.slice(42)
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}
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}
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_obtainParametersFunc(contract, input){
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const parameterList = this.web3.eth.abi.decodeParameters(contract.allowedFunctions[input.functionName].inputs, input.functionParameters);
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return function(parameterName){
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return parameterList[contract.allowedFunctions[input.functionName][parameterName]];
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}
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}
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_getFactor(input, contract, gasToken){
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if(contract.allowedFunctions[input.functionName].isToken){
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return this.web3.utils.toBN(this.settings.getToken(gasToken).pricePlugin.getFactor());
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} else {
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return this.web3.utils.toBN(1);
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}
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}
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async getBalance(token, input){
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// Determining balances of token used
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if(token.symbol == "ETH")
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return new this.web3.utils.BN(await this.web3.eth.getBalance(input.address));
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else {
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const Token = new this.web3.eth.Contract(erc20ABI);
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Token.options.address = params('gasToken');
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return new this.web3.utils.BN(await Token.methods.balanceOf(input.address).call());
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}
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}
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async process(error, message){
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if(error){
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console.error(error);
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} else {
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let input = this._extractInput(message);
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const contract = this.settings.getContractByTopic(message.topic);
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console.info("Processing request to: %s, %s", input.address, input.functionName);
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if(!this._validateInput(message, input)) return; // TODO Log
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const params = this._obtainParametersFunc(contract, input);
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const token = this.settings.getToken(params('gasToken'));
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if(token == undefined)
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return reply("Token not allowed", message);
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const gasPrice = this.web3.utils.toBN(params('gasPrice'));
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const gasLimit = this.web3.utils.toBN(params('gasLimit'));
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// Determine if enough balance for baseToken
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if(contract.allowedFunctions[input.functionName].isToken){
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const Token = new this.web3.eth.Contract(erc20ABI);
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Token.options.address = params('token');
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const baseToken = new this.web3.utils.BN(await Token.methods.balanceOf(input.address).call());
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if(balance.lt(this.web3.utils.BN(params('value')))){
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this._reply("Not enough balance", message);
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return;
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}
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}
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const balance = await this.getBalance(token, input);
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const gasToken = params('gasToken');
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const factor = this._getFactor(input, contract, gasToken);
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const balanceInETH = balance.div(factor);
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const gasLimitInETH = gasLimit.div(factor);
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if(balanceInETH.lt(this.web3.utils.toBN(gasPrice.mul(gasLimit)))) {
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this._reply("Not enough balance", message);
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return;
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}
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// Estimate costs
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const web3Sim = new Web3(ganache.provider({fork: `${config.node.protocol}://${config.node.host}:${config.node.port}`}));
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const simAccounts = await web3Sim.eth.getAccounts();
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let simulatedReceipt = await web3Sim.eth.sendTransaction({
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from: simAccounts[0],
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to: input.address,
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value: 0,
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data: input.payload
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});
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const estimatedGas = web3.utils.toBN(simulatedReceipt.gasUsed);
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if(gasLimit.lt(estimatedGas)) {
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return this._reply("Gas limit below estimated gas", message);
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}
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this.web3.eth.sendTransaction({
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from: config.node.blockchain.account,
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to: address,
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value: 0,
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data: input.payload,
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gasLimit: gasLimitInETH
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})
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.then(function(receipt){
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return this._reply("Transaction mined;" + receipt.transactionHash, message);
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}).catch(function(err){
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this._reply("Couldn't mine transaction", message);
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// TODO log this?
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console.error(err);
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});
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}
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}
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}
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module.exports = MessageProcessor;
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@ -1,245 +1,71 @@
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const md5 = require('md5');
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const EventEmitter = require('events');
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const Web3 = require('web3');
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const config = require('../config/config.json');
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const web3 = new Web3(`${config.whisper.protocol}://${config.whisper.host}:${config.whisper.port}`);
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var ganache = require("ganache-cli");
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const erc20ABI = require('../abi/ERC20.json');
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const ContractSettings = require('./contract-settings');
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const MessageProcessor = require('./message-processor');
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console.info("Starting...")
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// TODO A node should call an API (probably from a status node) to register itself as a
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// token gas relayer.
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async function start(){
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for(token in config.tokens){
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if(config.tokens[token].pricePlugin !== undefined){
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let PricePlugin = require(config.tokens[token].pricePlugin);
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config.tokens[token].pricePlugin = new PricePlugin(config.tokens)
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}
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}
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console.info("Starting...");
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const events = new EventEmitter();
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config.topics = [];
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for(let contractName in config.contracts){
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// Obtaining the abis
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config.contracts[contractName].abi = require(config.contracts[contractName].abiFile);
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// Web3 Connection
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let connectionURL = `${config.node.protocol}://${config.node.host}:${config.node.port}`;
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const web3 = new Web3(connectionURL);
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const lngt = config.contracts[contractName].allowedFunctions.length;
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for(i = 0; i < lngt; i++){
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config.contracts[contractName].allowedFunctions[i].functionName = config.contracts[contractName].allowedFunctions[i].function.slice(0, config.contracts[contractName].allowedFunctions[i].function.indexOf('('));
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// Extracting input
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config.contracts[contractName].allowedFunctions[i].inputs = config.contracts[contractName].abi.filter(x => x.name == config.contracts[contractName].allowedFunctions[i].functionName && x.type == "function")[0].inputs;
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// Obtaining function signatures
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let functionSignature = web3.utils.sha3(config.contracts[contractName].allowedFunctions[i].function).slice(0, 10);
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config.contracts[contractName].allowedFunctions[functionSignature] = config.contracts[contractName].allowedFunctions[i];
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delete config.contracts[contractName].allowedFunctions[i];
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}
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config.contracts[contractName].functionSignatures = Object.keys(config.contracts[contractName].allowedFunctions);
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// Extracting topics and available functions
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let topicName = web3.utils.toHex(contractName).slice(0, 10);
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config.topics.push(topicName);
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config.contracts[topicName] = config.contracts[contractName];
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config.contracts[topicName].name = contractName;
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delete config.contracts[contractName];
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// Get Contract Bytecode
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let contractAddress = config.contracts[topicName].address;
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if(config.contracts[topicName].isIdentity){
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const lastKernelSignature = "0x4ac99424";
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let kernel = await web3.eth.call({to: config.contracts[topicName].factoryAddress, data: lastKernelSignature});
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contractAddress = '0x' + kernel.slice(26);
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}
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web3.eth.net.isListening()
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.then(listening => events.emit('web3:connected', connectionURL))
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.catch(error => {
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console.error(error);
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process.exit();
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});
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try {
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config.contracts[topicName].code = md5(await web3.eth.getCode(contractAddress));
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} catch(err){
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console.error("Invalid contract for " + contractName);
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console.error(err);
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process.exit();
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}
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}
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events.on('web3:connected', connURL => {
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console.info("Connected to '%s'", connURL);
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let settings = new ContractSettings(config, web3, events);
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settings.process();
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});
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// Setting up Whisper options
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const shhOptions = {
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ttl: config.whisper.ttl,
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minPow: config.whisper.minPow,
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};
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let kId;
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let symKId;
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// Listening to whisper
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events.on('setup:complete', (settings) => {
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// Setting up Whisper options
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const shhOptions = {
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ttl: config.node.whisper.ttl,
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minPow: config.node.whisper.minPow,
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};
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web3.shh.addSymKey(config.whisper.symKey)
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let kId;
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let symKId;
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// Listening to whisper
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web3.shh.addSymKey(config.node.whisper.symKey)
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.then(symKeyId => {
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symKId = symKeyId;
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return web3.shh.newKeyPair();
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symKId = symKeyId;
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return web3.shh.newKeyPair();
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})
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.then(keyId => {
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shhOptions.symKeyId = symKId;
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kId = keyId;
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shhOptions.kId = keyId;
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console.info(`Sym Key: ${config.whisper.symKey}`);
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console.info(`Sym Key: ${config.node.whisper.symKey}`);
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console.info("Topics Available:");
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config.topics = [];
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for(let contractName in config.contracts) {
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console.info("- %s: %s [%s]", config.contracts[contractName].name, contractName, Object.keys(config.contracts[contractName].allowedFunctions).join(', '));
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shhOptions.topics = [contractName];
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web3.shh.subscribe('messages', shhOptions, processMessages);
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for(let contract in settings.contracts) {
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console.info("- %s: %s [%s]", settings.getContractByTopic(contract).name, contract, Object.keys(settings.getContractByTopic(contract).allowedFunctions).join(', '));
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shhOptions.topics = [contract];
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events.emit('server:listen', shhOptions, settings);
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}
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console.info("Started.");
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console.info("Listening for messages...")
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});
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const reply = async function(text, message){
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try {
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if(message.sig !== undefined){
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let shhOptions = {
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pubKey: message.sig,
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sig: kId,
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ttl: config.whisper.ttl,
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powTarget:config.whisper.minPow,
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powTime: config.whisper.powTime,
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topic: message.topic,
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payload: web3.utils.fromAscii(text)
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};
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await web3.shh.post(shhOptions);
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}
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} catch(Err){
|
||||
// TODO
|
||||
console.error(Err);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// Process individual whisper message
|
||||
const processMessages = async function(error, message, subscription){
|
||||
if(error){
|
||||
// TODO log
|
||||
console.error(error);
|
||||
} else {
|
||||
const address = message.payload.slice(0, 42);
|
||||
const functionName = '0x' + message.payload.slice(42, 50);
|
||||
const functionParameters = '0x' + message.payload.slice(50);
|
||||
const payload = '0x' + message.payload.slice(42);
|
||||
|
||||
console.info("Processing request to: %s, %s", address, functionName);
|
||||
|
||||
if(!/^0x[0-9a-f]{40}$/i.test(address))
|
||||
return reply('Invalid address', message);
|
||||
|
||||
if(config.contracts[message.topic] == undefined)
|
||||
return reply('Invalid topic', message);
|
||||
|
||||
const contract = config.contracts[message.topic];
|
||||
if(!contract.functionSignatures.includes(functionName))
|
||||
return reply('Function not allowed', message) // TODO Log this
|
||||
|
||||
// Get code from address and compare it against the contract code
|
||||
const code = md5(await web3.eth.getCode(address));
|
||||
if(code != contract.code){
|
||||
return reply('Invalid contract code', message); // TODO Log this
|
||||
}
|
||||
|
||||
const params = web3.eth.abi.decodeParameters(contract.allowedFunctions[functionName].inputs, functionParameters);
|
||||
const token = config.tokens[params[contract.allowedFunctions[functionName].gasToken]];
|
||||
if(token == undefined){
|
||||
return reply("Token not allowed", message);
|
||||
}
|
||||
|
||||
const gasPrice = web3.utils.toBN(params[contract.allowedFunctions[functionName].gasPrice]);
|
||||
const gasLimit = web3.utils.toBN(params[contract.allowedFunctions[functionName].gasLimit]);
|
||||
|
||||
// Determining balances of token used
|
||||
let balance;
|
||||
if(token.symbol == "ETH")
|
||||
balance = new web3.utils.BN(await web3.eth.getBalance(address));
|
||||
else {
|
||||
const Token = new web3.eth.Contract(erc20ABI);
|
||||
Token.options.address = params[contract.allowedFunctions[functionName].gasToken];
|
||||
balance = new web3.utils.BN(await Token.methods.balanceOf(address).call());
|
||||
}
|
||||
|
||||
// Determine if enough balance for baseToken
|
||||
if(contract.allowedFunctions[functionName].isToken){
|
||||
const Token = new web3.eth.Contract(erc20ABI);
|
||||
Token.options.address = params[contract.allowedFunctions[functionName].token];
|
||||
balance = new web3.utils.BN(await Token.methods.balanceOf(address).call());
|
||||
if(balance.lt(web3.utils.BN(params[contract.allowedFunctions[functionName].value]))){
|
||||
return reply("Not enough balance", message);
|
||||
}
|
||||
}
|
||||
|
||||
// Obtain factor
|
||||
let factor;
|
||||
if(contract.allowedFunctions[functionName].isToken){
|
||||
factor =web3.utils.toBN(config.tokens[tokenAddress].pricePlugin.getFactor());
|
||||
} else {
|
||||
factor = web3.utils.toBN(1);
|
||||
}
|
||||
|
||||
const balanceInETH = balance.div(factor);
|
||||
const gasLimitInETH = gasLimit.div(factor);
|
||||
|
||||
if(balanceInETH.lt(web3.utils.toBN(gasPrice.mul(gasLimit)))) {
|
||||
return reply("Not enough balance", message);
|
||||
}
|
||||
|
||||
// Estimate costs
|
||||
const web3Sim = new Web3(ganache.provider({fork: `http://localhost:8545`}));
|
||||
const simAccounts = await web3Sim.eth.getAccounts();
|
||||
let simulatedReceipt = await web3Sim.eth.sendTransaction({
|
||||
from: simAccounts[0],
|
||||
to: address,
|
||||
value: 0,
|
||||
data: payload
|
||||
});
|
||||
|
||||
const estimatedGas = web3.utils.toBN(simulatedReceipt.gasUsed);
|
||||
console.log(simulatedReceipt);
|
||||
if(gasLimit.lt(estimatedGas)) {
|
||||
return reply("Gas limit below estimated gas", message);
|
||||
}
|
||||
|
||||
|
||||
web3.eth.sendTransaction({
|
||||
from: config.blockchain.account,
|
||||
to: address,
|
||||
value: 0,
|
||||
data: payload,
|
||||
gasLimit: gasLimitInETH
|
||||
})
|
||||
.then(function(receipt){
|
||||
return reply("Transaction mined;" + receipt.transactionHash, message);
|
||||
}).catch(function(err){
|
||||
reply("Couldn't mine transaction", message);
|
||||
// TODO log this?
|
||||
//console.error(err);
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
start();
|
||||
|
||||
|
||||
});
|
||||
|
||||
|
||||
events.on('server:listen', (shhOptions, settings) => {
|
||||
let processor = new MessageProcessor(config, settings, web3, shhOptions.kId);
|
||||
web3.shh.subscribe('messages', shhOptions, (error, message, subscription) => processor.process(error, message));
|
||||
});
|
||||
|
||||
|
||||
// Daemon helper functions
|
||||
|
|
@ -248,14 +74,6 @@ process.on("uncaughtException", function(err) {
|
|||
|
||||
});
|
||||
|
||||
process.on("SIGUSR1", function() {
|
||||
log("Reloading...");
|
||||
|
||||
|
||||
log("Reloaded.");
|
||||
});
|
||||
|
||||
process.once("SIGTERM", function() {
|
||||
log("Stopping...");
|
||||
});
|
||||
|
||||
});
|
||||
|
|
@ -40,8 +40,6 @@ contract TestIdentityFactory {
|
|||
function TestIdentityFactory(){
|
||||
latestKernel = address(new TestIdentityGasRelay());
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
contract TestSNTController {
|
||||
|
|
|
|||
Loading…
Reference in New Issue