def get_etherscan_link(network, address):
    """Construct etherscan link"""

    if network == "mainnet":
        return "https://etherscan.io/address/" + address
    elif network == "ropsten":
        return "https://ropsten.etherscan.io/address/" + address
    elif network == "kovan":
        return "https://kovan.etherscan.io/address/" + address
    else:
        raise RuntimeError("Unknown network: {}".format(network))