markusait

let Web3 = require("web3");
const Tx = require('ethereumjs-tx')

var abi = '[{"name": "TokenPurchase", "inputs": [{"type": "address", "name": "buyer", "indexed": true}, {"type": "uint256", "name": "eth_sold", "indexed": true}, {"type": "uint256", "name": "tokens_bought", "indexed": true}], "anonymous": false, "type": "event"}, {"name": "EthPurchase", "inputs": [{"type": "address", "name": "buyer", "indexed": true}, {"type": "uint256", "name": "tokens_sold", "indexed": true}, {"type": "uint256", "name": "eth_bought", "indexed": true}], "anonymous": false, "type": "event"}, {"name": "AddLiquidity", "inputs": [{"type": "address", "name": "provider", "indexed": true}, {"type": "uint256", "name": "eth_amount", "indexed": true}, {"type": "uint256", "name": "token_amount", "indexed": true}], "anonymous": false, "type": "event"}, {"name": "RemoveLiquidity", "inputs": [{"type": "address", "name": "provider", "indexed": true}, {"type": "uint256", "name": "eth_amount", "indexed": true}, {"type": "uint256", "name": "tok