Set bitcoind options globally.
    Call this before trying to talk to bitcoind.

def get_bitcoind_config(config_file=None, impl=None):
    """
    Set bitcoind options globally.
    Call this before trying to talk to bitcoind.
    """

    loaded = False

    bitcoind_server = None
    bitcoind_port = None
    bitcoind_user = None
    bitcoind_passwd = None
    bitcoind_timeout = None
    bitcoind_regtest = None
    bitcoind_p2p_port = None
    bitcoind_spv_path = None

    regtest = None

    if config_file is not None:

        parser = SafeConfigParser()
        parser.read(config_file)

        if parser.has_section('bitcoind'):

            if parser.has_option('bitcoind', 'server'):
                bitcoind_server = parser.get('bitcoind', 'server')

            if parser.has_option('bitcoind', 'port'):
                bitcoind_port = int(parser.get('bitcoind', 'port'))

            if parser.has_option('bitcoind', 'p2p_port'):
                bitcoind_p2p_port = int(parser.get('bitcoind', 'p2p_port'))

            if parser.has_option('bitcoind', 'user'):
                bitcoind_user = parser.get('bitcoind', 'user')

            if parser.has_option('bitcoind', 'passwd'):
                bitcoind_passwd = parser.get('bitcoind', 'passwd')

            if parser.has_option('bitcoind', 'spv_path'):
                bitcoind_spv_path = parser.get('bitcoind', 'spv_path')

            if parser.has_option('bitcoind', 'regtest'):
                regtest = parser.get('bitcoind', 'regtest')
            else:
                regtest = 'no'

            if parser.has_option('bitcoind', 'timeout'):
                bitcoind_timeout = float(parser.get('bitcoind', 'timeout'))

            if regtest.lower() in ["yes", "y", "true", "1", "on"]:
                bitcoind_regtest = True
            else:
                bitcoind_regtest = False
            
            loaded = True

    if not loaded:

        bitcoind_server = 'bitcoin.blockstack.com'
        bitcoind_port = 8332
        bitcoind_user = 'blockstack'
        bitcoind_passwd = 'blockstacksystem'
        bitcoind_regtest = False
        bitcoind_timeout = 300
        bitcoind_p2p_port = 8333
        bitcoind_spv_path = os.path.expanduser("~/.virtualchain-spv-headers.dat")

    default_bitcoin_opts = {
        "bitcoind_user": bitcoind_user,
        "bitcoind_passwd": bitcoind_passwd,
        "bitcoind_server": bitcoind_server,
        "bitcoind_port": bitcoind_port,
        "bitcoind_timeout": bitcoind_timeout,
        "bitcoind_regtest": bitcoind_regtest,
        "bitcoind_p2p_port": bitcoind_p2p_port,
        "bitcoind_spv_path": bitcoind_spv_path
    }

    return default_bitcoin_opts