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@austintgriffith
Last active March 6, 2024 03:00
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A super simple meta transaction relayer.
"use strict";
const express = require('express');
const helmet = require('helmet');
const app = express();
const fs = require('fs');
const ContractLoader = function(contractList,web3){
let contracts = []
for(let c in contractList){
try{
let abi = require("./src/contracts/"+contractList[c]+".abi.js")
let address = require("./src/contracts/"+contractList[c]+".address.js")
console.log(contractList[c],address,abi.length)
contracts[contractList[c]] = new web3.eth.Contract(abi,address)
console.log("contract")
contracts[contractList[c]].blockNumber = require("./src/contracts/"+contractList[c]+".blocknumber.js")
console.log("@ Block",contracts[contractList[c]].blockNumber)
}catch(e){console.log(e)}
}
return contracts
}
var bodyParser = require('body-parser')
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
app.use(helmet());
var cors = require('cors')
app.use(cors())
let contracts;
var Web3 = require('web3');
var web3 = new Web3();
web3.setProvider(new web3.providers.HttpProvider('http://0.0.0.0:8545'));
let transactions = {}
const DESKTOPMINERACCOUNT = 3 //index in geth
let accounts
web3.eth.getAccounts().then((_accounts)=>{
accounts=_accounts
console.log("ACCOUNTS",accounts)
})
const NETWORK = parseInt(fs.readFileSync("./deploy.network").toString().trim())
if(!NETWORK){
console.log("No deploy.network found exiting...")
process.exit()
}
console.log("NETWORK:",NETWORK)
console.log("LOADING CONTRACTS")
contracts = ContractLoader(["Proxy"],web3);
app.get('/', (req, res) => {
res.setHeader('Access-Control-Allow-Origin', '*');
console.log("/")
res.set('Content-Type', 'application/json');
res.end(JSON.stringify({hello:"world"}));
});
app.get('/miner', (req, res) => {
res.setHeader('Access-Control-Allow-Origin', '*');
console.log("/miner")
res.set('Content-Type', 'application/json');
res.end(JSON.stringify({address:accounts[DESKTOPMINERACCOUNT]}));
});
app.get('/txs/:account', (req, res) => {
res.setHeader('Access-Control-Allow-Origin', '*');
console.log("/txs/"+req.params.account)
let thisTxsKey = req.params.account.toLowerCase()
console.log("Getting Transactions for ",thisTxsKey)
let allTxs = transactions[thisTxsKey]
let recentTxns = []
for(let a in allTxs){
let age = Date.now() - allTxs[a].time
if(age<120000){
recentTxns.push(allTxs[a])
}
}
res.set('Content-Type', 'application/json');
res.end(JSON.stringify(allTxs));
});
app.post('/tx', async (req, res) => {
res.setHeader('Access-Control-Allow-Origin', '*');
console.log("/tx",req.body)
console.log("RECOVER:",req.body.message,req.body.sig)
let account = web3.eth.accounts.recover(req.body.message,req.body.sig)
console.log("RECOVERED:",account)
if(account.toLowerCase()==req.body.parts[1].toLowerCase()){
console.log("Correct sig... relay transaction to contract... might want more filtering here, but just blindly do it for now")
//console.log(contracts.BouncerProxy)
let contract = new web3.eth.Contract(contracts.Proxy._jsonInterface,req.body.parts[0])
console.log("Forwarding tx to ",contract._address," with local account ",accounts[3])
let txparams = {
from: accounts[DESKTOPMINERACCOUNT],
gas: req.body.gas,
gasPrice:Math.round(4 * 1000000000)
}
//first get the hash to see if there is already a tx in motion
let hash = await contract.methods.getHash(req.body.parts[1],req.body.parts[2],req.body.parts[3],req.body.parts[4]).call()
console.log("HASH:",hash)
//const result = await clevis("contract","forward","BouncerProxy",accountIndexSender,sig,accounts[accountIndexSigner],localContractAddress("Example"),"0",data,rewardAddress,reqardAmount)
console.log("TX",req.body.sig,req.body.parts[1],req.body.parts[2],req.body.parts[3],req.body.parts[4])
console.log("PARAMS",txparams)
contract.methods.forward(req.body.sig,req.body.parts[1],req.body.parts[2],req.body.parts[3],req.body.parts[4]).send(
txparams ,(error, transactionHash)=>{
console.log("TX CALLBACK",error,transactionHash)
res.set('Content-Type', 'application/json');
res.end(JSON.stringify({transactionHash:transactionHash}));
let fromAddress = req.body.parts[1].toLowerCase()
if(!transactions[fromAddress]){
transactions[fromAddress] = []
}
if(transactions[fromAddress].indexOf(transactions)<0){
transactions[fromAddress].push({hash:transactionHash,time:Date.now(),metatx:true,miner:accounts[DESKTOPMINERACCOUNT]})
}
}
)
.on('error',(err,receiptMaybe)=>{
console.log("TX ERROR",err,receiptMaybe)
})
.on('transactionHash',(transactionHash)=>{
console.log("TX HASH",transactionHash)
})
.on('receipt',(receipt)=>{
console.log("TX RECEIPT",receipt)
})
/*.on('confirmation', (confirmations,receipt)=>{
console.log("TX CONFIRM",confirmations,receipt)
})*/
.then((receipt)=>{
console.log("TX THEN",receipt)
})
}
});
app.listen(9999);
console.log(`http listening on 9999`);
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