def get_default_ipc_path(testnet=False):
    if testnet:
        testnet = "testnet"
    else:
        testnet = ""

    if sys.platform == 'darwin':
        ipc_path = os.path.expanduser(os.path.join(
            "~",
            "Library",
            "Ethereum",
            testnet,
            "geth.ipc"
        ))
        if os.path.exists(ipc_path):
            return ipc_path

        ipc_path = os.path.expanduser(os.path.join(
            "~",
            "Library",
            "Application Support",
            "io.parity.ethereum",
            "jsonrpc.ipc"
        ))
        if os.path.exists(ipc_path):
            return ipc_path

    elif sys.platform.startswith('linux') or sys.platform.startswith('freebsd'):
        ipc_path = os.path.expanduser(os.path.join(
            "~",
            ".ethereum",
            testnet,
            "geth.ipc"
        ))
        if os.path.exists(ipc_path):
            return ipc_path

        ipc_path = os.path.expanduser(os.path.join(
            "~",
            ".local",
            "share",
            "io.parity.ethereum",
            "jsonrpc.ipc"
        ))
        if os.path.exists(ipc_path):
            return ipc_path

    elif sys.platform == 'win32':
        ipc_path = os.path.join(
            "\\",
            ".",
            "pipe",
            "geth.ipc"
        )
        if os.path.exists(ipc_path):
            return ipc_path

        ipc_path = os.path.join(
            "\\",
            ".",
            "pipe",
            "jsonrpc.ipc"
        )
        if os.path.exists(ipc_path):
            return ipc_path