human
Complete the below
def main():

    ''''Main function'
    '''
assistant
#Here is the Python program you requested.
    ctx = {}
    def pretty_json(data):
        return json.dumps(data, indent=2, sort_keys=True)
    client = server.create_app().test_client()
    host = 'example.com:9984'
    res = client.get('/', environ_overrides={'HTTP_HOST': host})
    res_data = json.loads(res.data.decode())
    res_data['keyring'] = ['6qHyZew94NMmUTYyHnkZsB8cxJYuRNEiEpXHe1ih9QX3', 'AdDuyrTyjrDt935YnFu4VBCVDhHtY2Y6rcy7x2TFeiRi']
    res_data['public_key'] = 'NC8c8rYcAhyKVpx1PCV65CBmyq4YUbLysy3Rqrg8L8mz'
    ctx['index'] = pretty_json(res_data)
    res = client.get('/api/v1/', environ_overrides={'HTTP_HOST': host})
    ctx['api_index'] = pretty_json(json.loads(res.data.decode()))
    privkey = 'CfdqtD7sS7FgkMoGPXw55MVGGFwQLAoHYTcBhZDtF99Z'
    pubkey = '4K9sWUMFwTgaDGPfdynrbxWqWS6sWmKbZoTjxLtVUibD'
    asset = {'msg': 'Hello    BigchainDB!'}
    tx = Transaction.create([pubkey], [([pubkey], 1)], asset=asset, metadata={'sequence': 0})
    tx = tx.sign([privkey])
    ctx['tx'] = pretty_json(tx.to_dict())
    ctx['public_keys'] = tx.outputs[0].public_keys[0]
    ctx['txid'] = tx.id
    privkey_transfer = '3AeWpPdhEZzWLYfkfYHBfMFC2r1f8HEaGS9NtbbKssya'
    pubkey_transfer = '3yfQPHeWAa1MxTX9Zf9176QqcpcnWcanVZZbaHb8B3h9'
    cid = 0
    input_ = Input(fulfillment=tx.outputs[cid].fulfillment, fulfills=TransactionLink(txid=tx.id, output=cid), owners_before=tx.outputs[cid].public_keys)
    tx_transfer = Transaction.transfer([input_], [([pubkey_transfer], 1)], asset_id=tx.id, metadata={'sequence': 1})
    tx_transfer = tx_transfer.sign([privkey])
    ctx['tx_transfer'] = pretty_json(tx_transfer.to_dict())
    ctx['public_keys_transfer'] = tx_transfer.outputs[0].public_keys[0]
    ctx['tx_transfer_id'] = tx_transfer.id
    pubkey_transfer_last = '3Af3fhhjU6d9WecEM9Uw5hfom9kNEwE7YuDWdqAUssqm'
    cid = 0
    input_ = Input(fulfillment=tx_transfer.outputs[cid].fulfillment, fulfills=TransactionLink(txid=tx_transfer.id, output=cid), owners_before=tx_transfer.outputs[cid].public_keys)
    tx_transfer_last = Transaction.transfer([input_],...