import os

os.environ["web3_connect_type"] = "HTTPProvider"
os.environ["web3_connect_address"] = "https://rinkeby.infura.io/v3/e69cf7d6804b46739e92514a50a0b57e"
os.environ["web3_testnet"] = "1"
os.environ["data_dir"] = "/Users/lengai/eth_tool/test/"