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Pyzil

Introduction

pyzil is a python library for interacting with the Zilliqa network. It can create wallets, deploy contracts, and invoke transitions to interact with smart contracts on the Zilliqa network.

Source Code

The github repository can be found at Zilliqa/pyzil

Releases

All releases of gozilliqa can be found at https://github.com/Zilliqa/pyzil/releases

Installation

pip install pyzil

or from the source code:

git clone https://github.com/Zilliqa/pyzil
cd pyzil
pip install -r requirements.txt
python setup.py install

Demo

Import pyzil

from pprint import pprint

from pyzil.crypto import zilkey
from pyzil.zilliqa import chain
from pyzil.zilliqa.units import Zil, Qa
from pyzil.account import Account, BatchTransfer

Set Active Chain, MainNet or TestNet

chain.set_active_chain(chain.MainNet)
chain.set_active_chain(chain.TestNet)
chain.set_active_chain(chain.IsolatedServer)

SeedNode = chain.BlockChain(
    "https://test-api.zilliqa.com/",
    version=65537, network_id=1)
chain.set_active_chain(SeedNode)

ZILs Transaction

# load account from wallet address
account = Account(address="95B27EC211F86748DD985E1424B4058E94AA5814")
balance = account.get_balance()
print("{}: {}".format(account, balance))

# load account from private key
# private key is required to send ZILs
account = Account(private_key="...")
balance2 = account.get_balance()
print("Account balance: {}".format(balance2))

# to_addr must be bech32 address or 20 bytes checksum address
to_addr = "zil1k5xzgp8xn87eshm3ktplqvs9nufav4pmcm52xx"
# send ZILs
txn_info = account.transfer(to_addr=to_addr, zils=2.718)
pprint(txn_info)
txn_id = txn_info["TranID"]

# wait chain confirm, may takes 2-3 minutes on MainNet
txn_details = account.wait_txn_confirm(txn_id, timeout=300)
pprint(txn_details)
if txn_details and txn_details["receipt"]["success"]:
    print("Txn success: {}".format(txn_id))
else:
    print("Txn failed: {}".format(txn_id))

Send by Qa

amount = Qa(1234567890)
txn_info = account.transfer(to_addr=to_addr, zils=amount)
pprint(txn_info)
txn_id = txn_info["TranID"]

Wait for confirm

amount = Zil(3.14)
txn_details = account.transfer(to_addr, zils=amount,
                               confirm=True, timeout=300, sleep=20)
print("Transfer Result:")
pprint(txn_details)
pprint(account.last_params)
pprint(account.last_txn_info)
pprint(account.last_txn_details)

Batch Transfer (Send zils to multi addresses)

batch = [BatchTransfer(to_addr=to_addr, zils=i) for i in range(10)]
pprint(batch)

txn_info_list = account.transfer_batch(batch)
pprint(txn_info_list)

for txn_info in txn_info_list:
    if not txn_info:
        print("Failed to create txn")
        continue

    txn_details = account.wait_txn_confirm(txn_info["TranID"], timeout=300)
    pprint(txn_details)
    if txn_details and txn_details["receipt"]["success"]:
        print("Txn success")
    else:
        print("Txn failed")

balance2 = account.get_balance()
print("Account balance: {}".format(balance2))

Send ZILs from nodes to wallet

nodes_keys = [
    "private_key1",
    "private_key2",
    "private_key3",
]

to_address = "your wallet address"
to_account = Account(address=to_address)
print("Account balance: {}".format(to_account.get_balance()))

min_gas = Qa(chain.active_chain.api.GetMinimumGasPrice())

txn_info_list = []
for key in nodes_keys:
    if not key:
       continue
    account = Account(private_key=key)
    # send all zils
    amount = account.get_balance_qa() - min_gas * 2
    if amount <= 0:
        continue

    txn_info = account.transfer(to_addr=to_account.bech32_address, zils=amount, gas_price=min_gas)
    pprint(txn_info)

    txn_info_list.append(txn_info)

for txn_info in txn_info_list:
    txn_details = chain.active_chain.wait_txn_confirm(txn_info["TranID"], timeout=300)
    pprint(txn_details)
    if txn_details and txn_details["receipt"]["success"]:
        print("Txn success")
    else:
        print("Txn failed")

print("Account balance: {}".format(to_account.get_balance()))

Load account from mykey.txt

account = Account.from_mykey_txt("mykey.txt")
print(account)

Load account from keystore.json

account = Account.from_keystore("keystore.json")
print(account)

See more examples in tests/test_account.py

bech32 address

# init from bech32 address
account1 = Account(address="zil1r5verznnwvrzrz6uhveyrlxuhkvccwnju4aehf")
print("address: {}".format(account1.address))
account2 = Account(address="1d19918a737306218b5cbb3241fcdcbd998c3a72")
print("bech32 address: {}".format(account2.bech32_address))
assert account1 == account2

# tranfer to bech32 address
account = Account.from_mykey_txt("mykey.txt")
txn_info = account.transfer(to_addr="zil1r5verznnwvrzrz6uhveyrlxuhkvccwnju4aehf", zils=0.01)
pprint(txn_info)
txn_id = txn_info["TranID"]

Zilliqa Low-level APIs

from pyzil.zilliqa.api import ZilliqaAPI, APIError

api = ZilliqaAPI("https://api.zilliqa.com/")
print(api)

info = api.GetBlockchainInfo()
pprint(info)

sharding = api.GetShardingStructure()
pprint(sharding)

ds_block = api.GetCurrentDSEpoch()
pprint(ds_block)

tx_block = api.GetCurrentMiniEpoch()
pprint(tx_block)

See more examples in tests/test_lowlevel_api.py

Zilliqa Currencies Units

from pyzil.zilliqa.units import Zil, Qa

zil = Zil(1000.123)
print(repr(zil))
assert zil == Zil("1000.123")

qa = Qa(1000123000000000)
print(repr(qa))
assert qa == zil
assert zil == qa

print(repr(zil + qa))
print(repr(zil - 2))
print(repr(zil * 2))
print(repr(zil / 2.0))

print(repr(qa - 2))
print(repr(qa * 2))
print(repr(qa // 2))

See more examples in tests/test_units.py

Zilliqa Smart Contract

from pprint import pprint
from pyzil.zilliqa import chain
from pyzil.account import Account
from pyzil.contract import Contract


chain.set_active_chain(chain.TestNet)

account = Account.from_keystore("zxcvbnm,", "zilliqa_keystore.json")

Get contract from address

address = "45dca9586598c8af78b191eaa28daf2b0a0b4f43"
contract = Contract.load_from_address(address, load_state=True)
print(contract)
print(contract.status)
pprint(contract.state)
contract.get_state(get_code=True, get_init=True)
pprint(contract.code)
pprint(contract.init)
pprint(contract.state)

New contract from code

code = open("HelloWorld.scilla").read()
contract = Contract.new_from_code(code)
print(contract)

# set account before deploy
contract.account = account

init = [
    Contract.value_dict("_scilla_version", "Uint32", "0"),
    Contract.value_dict("owner", "ByStr20", account.address0x)
]
contract.deploy(init_params=init, timeout=300, sleep=10)
assert contract.status == Contract.Status.Deployed

Get contracts

owner_addr = account.address
contracts = Contract.get_contracts(owner_addr)
pprint(contracts)
contracts2 = account.get_contracts()
pprint(contracts2)

assert contracts == contracts2

Call contract

contract_addr = "45dca9586598c8af78b191eaa28daf2b0a0b4f43"
contract = Contract.load_from_address(contract_addr)

contract.account = account

resp = contract.call(method="getHello", params=[])
pprint(resp)
pprint(contract.last_receipt)

resp = contract.call(method="setHello", params=[Contract.value_dict("msg", "String", "hi contract.")])
pprint(resp)
pprint(contract.last_receipt)

resp = contract.call(method="getHello", params=[])
pprint(resp)
pprint(contract.last_receipt)

# call contract and deposit Zils to contract (default is 0)
resp = contract.call(method="getHello", params=[], amount=Qa(110))
pprint(resp)
pprint(contract.last_receipt)

See more examples in test_contract.py