Python Library for VIZ

Usage examples

Award someone

from viz import Client

node = "wss://node.viz.cx/ws"
viz = Client(node=node, keys=["5...your_private_regular_key..."])

initiator = "your_account"
receiver = "id"
percent = 10.5 # 10.5%
viz.award(receiver, percent, "with love", None, initiator)

Award someone with fixed reward

from viz import Client

node = "wss://node.viz.cx/ws"
viz = Client(node=node, keys=["5...your_private_regular_key..."])

initiator = "your_account"
receiver = "id"
reward_amount = 3.5 # "3.50 VIZ"
max_energy = 30 # 30%
viz.fixed_award(receiver, reward_amount, max_energy, "with fixed reward", None, initiator)

Send a custom operation

from viz import Client

node = "wss://node.viz.cx/ws"
viz = Client(node=node, keys=["5...your_private_regular_key..."])

account = "your_account"
required_regular_auths = [account]
protocol = "color.place"
custom_json = {"x": 35, "y": 70, "color": "#e50000"}
viz.custom(protocol, custom_json, None, required_regular_auths)

Get data from custom protocol

from viz import Client
from viz.account import Account
from viz.block import Block
from viz.instance import set_shared_blockchain_instance
import json

viz = Client("wss://node.viz.cx/ws")
set_shared_blockchain_instance(viz)

account_name = "id"
protocol = "V"
account = Account(account_name, protocol=protocol)

counter_inside_protocol = account["custom_sequence"]
last_used_in_block = account["custom_sequence_block_num"]

block = Block(last_used_in_block)

for tx in block["transactions"]:
    for op_type, op_data in tx["operations"]:
        if op_type != "custom":
            continue
        if op_data.get("id") != protocol:
            continue
        if account_name not in op_data.get("required_regular_auths", []):
            continue

        raw_json = op_data.get("json")
        try:
            json_from_protocol = json.loads(raw_json) if raw_json else None
        except json.JSONDecodeError:
            json_from_protocol = None

        print(json_from_protocol)

Any direct RPC call

from viz import Client

viz = Client("wss://node.viz.cx/ws")
viz.rpc.get_dynamic_global_properties()

Installation

Current published version could be installed via

pip install viz-python-lib

Manual installation:

Install poetry

cd viz-python-lib/
poetry install

Development

Dependencies

Linux dependencies

sudo apt-get install libffi-dev libssl-dev python3-dev

Windows dependencies

Install regular version of OpenSSL (not Light) suitable for your core processor.

MacOS dependencies

Apple has deprecated use of OpenSSL in favor of its own TLS and crypto libraries. This means that you will need to install and export some OpenSSL settings yourself, before you can install viz-python-lib:

brew install openssl

and then use the following commands:

export CFLAGS="-I$(brew --prefix openssl)/include"
export LDFLAGS="-L$(brew --prefix openssl)/lib"