mirror of
https://github.com/status-im/snt-gas-relay.git
synced 2025-02-17 00:16:25 +00:00
Extracting identity strategy
This commit is contained in:
Richard Ramos
parent
79abda8091
commit
db54978c97
@ -12,7 +12,7 @@
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"port": 8545
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},
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"blockchain": {
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"account": "0x1847ab5a71eaa95315c3fc2d3dfb53b7e6e8f313"
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"account": "0x47B9F15c410E2f254E5e065ca515379b090c63e1"
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},
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"whisper": {
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"symKey": "0xd0d905c1c62b810b787141430417caf2b3f54cffadb395b7bb39fdeb8f17266b",
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@ -51,7 +51,7 @@
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"IdentityGasRelay": {
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"abiFile": "../abi/IdentityGasRelay.json",
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"isIdentity": true,
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"factoryAddress": "0x6202a2b202Ccf859fd93Ecee33C2D20f20462836",
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"factoryAddress": "0x9AA17f02d8f6Bc2553d06c60f99Bcc97Cd5E5A89",
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"kernelVerification": "isKernel(bytes32)",
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"allowedFunctions": [
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{
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@ -4,6 +4,7 @@ class ContractSettings {
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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.config = config;
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this.web3 = web3;
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this.events = eventEmitter;
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@ -51,7 +52,7 @@ class ContractSettings {
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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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.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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@ -92,7 +93,8 @@ class ContractSettings {
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// Obtaining strategy
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if(this.contracts[topicName].strategy){
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this.contracts[topicName].strategy = require(this.contracts[topicName].strategy);
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const strategy = require(this.contracts[topicName].strategy);
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this.contracts[topicName].strategy = new strategy(this.web3, this.config, this, this.contracts[topicName]);
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}
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this._obtainContractBytecode(topicName);
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@ -1,8 +1,3 @@
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const md5 = require('md5');
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const erc20ABI = require('../abi/ERC20Token.json');
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const ganache = require("ganache-cli");
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const Web3 = require('web3');
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class MessageProcessor {
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constructor(config, settings, web3, kId){
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@ -26,10 +21,10 @@ class MessageProcessor {
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}
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}
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async _validateInput(message, input){
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async _validateInput(message){
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const contract = this.settings.getContractByTopic(message.topic);
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if(!/^0x[0-9a-f]{40}$/i.test(input.address)){
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if(!/^0x[0-9a-f]{40}$/i.test(message.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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@ -39,14 +34,14 @@ class MessageProcessor {
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return false;
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}
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if(!contract.functionSignatures.includes(input.functionName)){
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if(!contract.functionSignatures.includes(message.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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if(!contract.isIdentity){
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const code = this.web3.utils.soliditySha3(await this.web3.eth.getCode(input.address));
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const code = this.web3.utils.soliditySha3(await this.web3.eth.getCode(message.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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@ -55,19 +50,6 @@ class MessageProcessor {
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return true;
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}
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async _validateInstance(message, input){
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const contract = this.settings.getContractByTopic(message.topic);
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const instanceCodeHash = this.web3.utils.soliditySha3(await this.web3.eth.getCode(input.address));
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const kernelVerifSignature = this.web3.utils.soliditySha3(contract.kernelVerification).slice(0, 10);
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if(instanceCodeHash == null) return false;
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let verificationResult = await this.web3.eth.call({
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to: contract.factoryAddress,
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data: kernelVerifSignature + instanceCodeHash.slice(2)});
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return this.web3.eth.abi.decodeParameter('bool', verificationResult);;
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}
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_extractInput(message){
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let obj = {
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address: null,
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@ -77,7 +59,8 @@ class MessageProcessor {
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};
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try {
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let parsedObj = JSON.parse(this.web3.utils.toAscii(message));
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let parsedObj = JSON.parse(this.web3.utils.toAscii(message.payload));
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obj.address = parsedObj.address;
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obj.functionName = parsedObj.encodedFunctionCall.slice(0, 10);
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obj.functionParameters = "0x" + parsedObj.encodedFunctionCall.slice(10);
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@ -86,109 +69,61 @@ class MessageProcessor {
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console.error("Couldn't parse " + message);
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}
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return obj;
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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[parameterName];
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}
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message.input = obj;
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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, gasToken){
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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.abi);
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Token.options.address = 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 _estimateGas(input, gasLimit){
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let web3Sim = new Web3(ganache.provider({
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fork: `${this.config.node.ganache.protocol}://${this.config.node.ganache.host}:${this.config.node.ganache.port}`,
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locked: false,
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gasLimit: 10000000
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}));
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let 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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gasLimit: gasLimit * 0.95 // 95% of current chain latest gas block limit
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});
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return web3Sim.utils.toBN(simulatedReceipt.gasUsed);
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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.payload);
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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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console.info("Processing request to: %s, %s", message.input.address, message.input.functionName);
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if(!await this._validateInput(message, input)) return; // TODO Log
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if(!await this._validateInput(message)) return; // TODO Log
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if(contract.strategy){
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let validationResult = contract.strategy(message, input)
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if(validationResult.success){
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let validationResult = await contract.strategy.execute(message);
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if(!validationResult.success){
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return this._reply(validationResult.message, message);
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}
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}
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const latestBlock = await this.web3.eth.getBlock("latest");
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let estimatedGas = 0;
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try {
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estimatedGas = await this._estimateGas(input, latestBlock.gasLimit);
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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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} catch(exc){
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if(exc.message.indexOf("revert") > -1)
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return this._reply("Transaction will revert", message);
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}
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let p = {
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from: this.config.node.blockchain.account,
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to: input.address,
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to: message.input.address,
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value: 0,
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data: input.payload,
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gas: gasLimit.toString(),
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data: message.input.payload,
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gasPrice: this.config.gasPrice
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};
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this.web3.eth.sendTransaction(p)
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.then((receipt) => {
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return this._reply("Transaction mined;"
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+ receipt.transactionHash
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+ ';'
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+ JSON.stringify(receipt)
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, message);
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}).catch((err) => {
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this._reply("Couldn't mine transaction: " + err.message, message);
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// TODO log this?
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console.error(err);
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});
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this.web3.eth.estimateGas(p)
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.then((estimatedGas) => {
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p.gas = parseInt(estimatedGas * 1.1)
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return this.web3.eth.sendTransaction(p);
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})
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.then((receipt) => {
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return this._reply("Transaction mined;"
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+ receipt.transactionHash
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+ ';'
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+ JSON.stringify(receipt)
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, message);
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}).catch((err) => {
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this._reply("Couldn't mine transaction: " + err.message, 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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@ -1,55 +1,122 @@
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const identityStrategy = () => {
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const erc20ABI = require('../../abi/ERC20Token.json');
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const ganache = require("ganache-cli");
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const Web3 = require('web3');
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class IdentityStrategy {
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/*
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// TODO extract this. Determine strategy depending on contract
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if(contract.isIdentity){
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let validInstance = await this._validateInstance(message, input);
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if(!validInstance){
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return this._reply("Invalid identity instance", message);
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}
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}
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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 this._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('_baseToken');
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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("Identity has not enough balance for specified value", message);
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return;
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}
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}
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const gasToken = params('_gasToken');
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const balance = await this.getBalance(token, input, gasToken);
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if(balance.lt(this.web3.utils.toBN(gasPrice.mul(gasLimit)))) {
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this._reply("Identity has not enough tokens for gasPrice*gasLimit", message);
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return;
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}
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*/
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return {
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success: true,
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message: "Test"
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constructor(web3, config, settings, contract){
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this.web3 = web3;
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this.settings = settings;
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this.contract = contract;
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this.config = config;
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}
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_obtainParametersFunc(message){
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const parameterList = this.web3.eth.abi.decodeParameters(this.contract.allowedFunctions[message.input.functionName].inputs, message.input.functionParameters);
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return function(parameterName){
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return parameterList[parameterName];
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}
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}
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async _validateInstance(message){
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const instanceCodeHash = this.web3.utils.soliditySha3(await this.web3.eth.getCode(message.input.address));
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const kernelVerifSignature = this.web3.utils.soliditySha3(this.contract.kernelVerification).slice(0, 10);
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if(instanceCodeHash == null) return false;
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let verificationResult = await this.web3.eth.call({
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to: this.contract.factoryAddress,
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data: kernelVerifSignature + instanceCodeHash.slice(2)});
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return this.web3.eth.abi.decodeParameter('bool', verificationResult);;
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}
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async getBalance(token, message, gasToken){
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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(message.input.address));
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} else {
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const Token = new this.web3.eth.Contract(erc20ABI.abi);
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Token.options.address = gasToken;
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return new this.web3.utils.BN(await Token.methods.balanceOf(message.input.address).call());
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}
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}
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async _estimateGas(message, gasLimit){
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let web3Sim = new Web3(ganache.provider({
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fork: `${this.config.node.ganache.protocol}://${this.config.node.ganache.host}:${this.config.node.ganache.port}`,
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locked: false,
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gasLimit: 10000000
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}));
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let 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: message.input.address,
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value: 0,
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data: message.input.payload,
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gasLimit: gasLimit * 0.95 // 95% of current chain latest gas block limit
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});
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return web3Sim.utils.toBN(simulatedReceipt.gasUsed);
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}
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async execute(message){
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if(this.contract.isIdentity){
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let validInstance = await this._validateInstance(message);
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if(!validInstance){
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return { success: false, message: "Invalid identity instance" };
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}
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}
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const params = this._obtainParametersFunc(message);
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// Verifying if token is allowed
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const token = this.settings.getToken(params('_gasToken'));
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if(token == undefined)
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return { success: false, message: "Token not allowed" };
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// Determine if enough balance for baseToken
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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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if(this.contract.allowedFunctions[message.input.functionName].isToken){
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const Token = new this.web3.eth.Contract(erc20ABI);
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Token.options.address = params('_baseToken');
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const baseToken = new this.web3.utils.BN(await Token.methods.balanceOf(message.input.address).call());
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if(balance.lt(this.web3.utils.BN(params('_value')))){
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return { success: false, message: "Identity has not enough balance for specified value" };
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}
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}
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// gasPrice * limit calculation
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const gasToken = params('_gasToken');
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const balance = await this.getBalance(token, message, gasToken);
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if(balance.lt(this.web3.utils.toBN(gasPrice.mul(gasLimit)))) {
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return { success: false, message: "Identity has not enough tokens for gasPrice*gasLimit"};
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}
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const latestBlock = await this.web3.eth.getBlock("latest");
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let estimatedGas = 0;
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try {
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estimatedGas = await this._estimateGas(message, latestBlock.gasLimit);
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if(gasLimit.lt(estimatedGas)) {
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return { success: false, message: "Gas limit below estimated gas" };
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}
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} catch(exc){
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if(exc.message.indexOf("revert") > -1)
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return { success: false, message: "Transaction will revert" };
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}
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return {
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success: true,
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message: "Test"
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};
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}
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}
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module.exports = identityStrategy;
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module.exports = IdentityStrategy;
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