py-vsys

Under active maintenance. Contributions are always welcome!

The official Python SDK for VSYS APIs. The old Python SDK is deprecated and will be archived soon.

• py-vsys
  • Installation
    • Pip
    • Pipenv
  • Quick Example
  • Docs
    • Account & Wallet
    • Chain & API
    • Smart Contracts
  • Run Tests
    • Functional Tests
  • Logging
  • Contributing

Installation

Pip

Install from PYPI

pip install py-vsys

Install from Github

pip install git+https://github.com/virtualeconomy/py-vsys.git

Pipenv

Install from PYPI

pipenv install py-vsys

Install from Github

pipenv install git+https://github.com/virtualeconomy/py-vsys.git#egg=py_vsys

Quick Example

import asyncio
import py_vsys as pv

# The RESTful API host address to a node in a public test net
HOST = "http://veldidina.vos.systems:9928"
# A test net wallet seed
SEED = ""


def print_heading(msg: str) -> None:
    print("=" * 10, f"{msg}", "=" * 10)


async def main():
    print_heading("Try out NodeAPI")
    # NodeAPI is the wrapper for RESTful APIs
    api: pv.NodeAPI = await pv.NodeAPI.new(HOST)
    # GET /blocks/last
    print(await api.blocks.get_height())
    # GET /node/version
    print(await api.node.get_version())

    print_heading("Try out Chain")
    # Chain represents the chain itself
    chain: pv.Chain = pv.Chain(api, pv.ChainID.TEST_NET)
    # Get chain's height
    print("Height: ", await chain.height)
    # Get chain's last block
    print("Last blcok:\n", await chain.last_block)

    print_heading("Try out Account")
    # Account represents an account in the net
    wallet: pv.Wallet = pv.Wallet.from_seed_str(SEED)
    acnt: pv.Account = wallet.get_account(chain, nonce=0)
    # Get the account's balance
    print("Balance:", await acnt.bal)
    # Get the account's public key
    print("Public key: ", acnt.key_pair.pub)
    # Get the account's private key
    print("Private key:", acnt.key_pair.pri)
    # Get the account's address
    print("Account address:", acnt.addr)

    print_heading("Try out Smart Contract")
    ctrt_id = "CFB6zvcy39FCRGhxo8HH3PE6zZEG5zXevhG"
    ctrt: pv.NFTCtrt = pv.NFTCtrt(ctrt_id, chain)
    # Get the contract's maker
    print("Maker:", await ctrt.maker)
    # Get the contract's issuer
    print("Issuer:", await ctrt.issuer)
    # Get the contract's ID
    print("Contract id: ", ctrt.ctrt_id)

    await api.sess.close()


if __name__ == "__main__":
    asyncio.run(main())

Example output

========== Try out NodeAPI ==========
{'height': 1294386}
{'version': 'VSYS Core v0.4.1'}
========== Try out Chain ==========
Height:  1294386
Last blcok:
 {'version': 1, 'timestamp': 1646617122022012339, 'reference': '5iCNrcmHAd7ksnsKbt793DbyeRhheNLuxqzo1CRspYrkPL1oXcqSwb3jdEb5nKra9XFvnqPXHS4R6fsRzEdqDFwx', 'SPOSConsensus': {'mintTime': 1646617122000000000, 'mintBalance': 50097894873482088}, 'resourcePricingData': {'computation': 0, 'storage': 0, 'memory': 0, 'randomIO': 0, 'sequentialIO': 0}, 'TransactionMerkleRoot': 'gSDLiXotSAb8iTqZynm13syWGEg2t22sqxsnExLZwLA', 'transactions': [{'type': 5, 'id': 'FE4gbQwmg8cUPHeEmbiGH4HdjD7d7GN1Y6Xvhv4AQsu4', 'recipient': 'ATxtBDygMvWtvh9xJaGQn5MdaHsbuQxbjiG', 'timestamp': 1646617122022012339, 'amount': 900000000, 'currentBlockHeight': 1294386, 'status': 'Success', 'feeCharged': 0}], 'generator': 'ATxtBDygMvWtvh9xJaGQn5MdaHsbuQxbjiG', 'signature': '4Q9LwLEJgQmUv5iQqWbt1ScDBYyNq1d3KcZUdUvEbUNsH3zJmdvRg4BvAVoBrb82NGLTrX8pPwpWMCseWraGbi5u', 'fee': 0, 'blocksize': 330, 'height': 1294386, 'transaction count': 1}
========== Try out Account ==========
Balance: VSYS(4867193229105012)
Nonce: Nonce(0)
Public key:  PubKey(6gmM7UxzUyRJXidy2DpXXMvrPqEF9hR1eAqsmh33J6eL)
Private key: PriKey(BHpnszuqFHXuwesGbvrozYpevZiMsL29vLvud1zScqEK)
Account address: Addr(AU6BNRK34SLuc27evpzJbAswB6ntHV2hmjD)
========== Try out Smart Contract ==========
Maker: Addr(AU6BNRK34SLuc27evpzJbAswB6ntHV2hmjD)
Issuer: Addr(AU6BNRK34SLuc27evpzJbAswB6ntHV2hmjD)
Contract id:  CtrtID(CFB6zvcy39FCRGhxo8HH3PE6zZEG5zXevhG)

Docs

Account & Wallet

• Account
• Wallet

Chain & API

• Chain
• Api

Smart Contracts

• NFT Contract V1
• NFT Contract V2
• Token Contract V1 without split
• Token Contract V1 with split
• Token Contract V2 without split
• Atomic Swap Contract
• Payment Channel Contract
• Lock Contract
• System Contract
• V Escrow Contract
• V Option Contract
• V Stable Swap Contract
• V Swap Contract

Run Tests

Functional Tests

Functional tests are scripts that simulate the behaviour of a normal user to interact wtih py_vsys(e.g. register a smart contract & call functions of it).

To run it, ensure that you have pytest properly installed(it is a development dependency of py_vsys and can be installed via pipenv install -d).

NOTE that the test environment defined as global variables in conftest.py has to be configured through environment vairables before the test cases can be executed.

Then go to the root of the of the project and run.

python -m pytest -v test/func_test

The above command will test each aspect(e.g. function send of NFT contract) individually and have required resources set up before testing(e.g. register a new contract, issue a token, etc). It's good for testing a specific aspect while it might consume too much resources to test every aspect in this way.

To test as a whole, use the whole marker like below.

python -m pytest -v test/func_test -m whole

Take NFT contract for an example, it will register a contract first and then execute functions like send, transfer, deposit, etc in a pre-orchestrated manner so that some common set up(e.g. register a contract) will be done only once.

To run a single test, say method test_pay of class TestAccount, run

python -m pytest -v test/func_test/test_acnt.py::TestAccount::test_pay

Logging

Logging for py-vsys is supported by loguru and is disabled by default. To enable it, add the following to your codes.

from loguru import logger
logger.enable("py_vsys")

Contributing

Contributions are always welcome!

See the development documentation for more details and please adhere to conventions mentioned in it.