pytoniq 0.1.18

TON Blockchain SDK

pytoniq

Pytoniq is a Python SDK for the TON Blockchain. This library extends pytoniq-core with native LiteClient and ADNL.

If you have any questions join Python - TON developers chat.

Documentation

GitBook

Installation

pip install pytoniq 

Examples

You can find them in the examples folder.

LiteClient

General LiteClient usage examples

Client initializing

from pytoniq import LiteClient


async def main():
    client = LiteClient.from_mainnet_config(  # choose mainnet, testnet or custom config dict
        ls_i=0,  # index of liteserver from config
        trust_level=2,  # trust level to liteserver
        timeout=15  # timeout not includes key blocks synchronization as it works in pytonlib
    )

    await client.connect()
    
    await client.get_masterchain_info()

    await client.reconnect()  # can reconnect to an exising object if had any errors

    await client.close()

Blocks transactions scanning

See BlockScanner code here.

from pytoniq_core import BlockIdExt
from pytoniq import LiteClient
from examples.blocks.block_scanner import BlockScanner  # this import is not available if downloaded from pypi

async def handle_block(block: BlockIdExt):
    if block.workchain == -1:  # skip masterchain blocks
        return
    print(block)
    transactions = await client.raw_get_block_transactions_ext(block)
    for transaction in transactions:
        print(transaction.in_msg)


client = LiteClient.from_mainnet_config(ls_i=14, trust_level=0, timeout=20)


async def main():

    await client.connect()
    await BlockScanner(client=client, block_handler=handle_block).run()

LiteBalancer

LiteBalancer is constantly pinging LiteServers to identify "alive" peers. When you make a request through LiteBalancer, it forwards the request to the "best" peer - the "alive" peer with the maximum last masterchain block seqno among all and minimum average response time.

LiteBalancer can also retry the request if a asyncio.TimeoutError occurs, but this must be explicitly set using the LiteBalancer.set_max_retries(retries_num) method.

client = LiteBalancer.from_mainnet_config(trust_level=1)

await client.start_up()

result = await client.run_get_method(address='EQBvW8Z5huBkMJYdnfAEM5JqTNkuWX3diqYENkWsIL0XggGG', method='seqno', stack=[])

await client.close_all()

Moreover, one of the most important features of LiteBalancer is that it detects archival LiteServers, so you can do requests only to archival LiteServers providing True for argument only_archive in any method:

# ask for very very old block
blk, _ = await client.lookup_block(-1, -2**63, 100, only_archive=True)  

# ask for old block and run get method for that block:
blk, _ = await client.lookup_block(-1, -2**63, 25000000, only_archive=True)
result = await client.run_get_method(address='EQBvW8Z5huBkMJYdnfAEM5JqTNkuWX3diqYENkWsIL0XggGG', method='seqno',
                                             stack=[], block=blk, only_archive=True)

Blockstore

The library can prove all data it receives from a Liteserver (Learn about trust levels here). If you want to use LiteClient or LiteBalancer with the zero trust level, at the first time run library will prove block link from the init_block to the last masterchain block. Last proved blocks will be stored in the .blockstore folder. The file data contains ttl and gen_utime of the last synced key block, its data serialized according to the BlockIdExt TL scheme (but in big–endian), last synced masterchain block data. Filename is first 88 bytes of data described above with init block hash.

ADNL

from pytoniq.adnl.adnl import AdnlTransport, Node

adnl = AdnlTransport(timeout=3)

# start adnl receiving server
await adnl.start()

# take peer from public config
peer = Node('172.104.59.125', 14432, "/YDNd+IwRUgL0mq21oC0L3RxrS8gTu0nciSPUrhqR78=", adnl)
await adnl.connect_to_peer(peer)
# or await peer.connect()

await peer.disconnect()

# send pings
await asyncio.sleep(10)

# stop adnl receiving server
await adnl.close()

DHT

import time

from pytoniq.adnl.adnl import AdnlTransport
from pytoniq.adnl.dht import DhtClient, DhtNode


adnl = AdnlTransport(timeout=5)
client = DhtClient.from_mainnet_config(adnl)

await adnl.start()

foundation_adnl_addr = '516618cf6cbe9004f6883e742c9a2e3ca53ed02e3e36f4cef62a98ee1e449174'
resp = await client.find_value(key=DhtClient.get_dht_key_id(bytes.fromhex(foundation_adnl_addr)))
print(resp)
#  {'@type': 'dht.valueFound', 'value': {'key': {'key': {'id': '516618cf6cbe9004f6883e742c9a2e3ca53ed02e3e36f4cef62a98ee1e449174', 'name': b'address', 'idx': 0, '@type': 'dht.key'}, 'id': {'key': '927d3e71e3ce651c3f172134d39163f70e4c792169e39f3d520bfad9388ad4ca', '@type': 'pub.ed25519'}, 'update_rule': {'@type': 'dht.updateRule.signature'}, 'signature': b"g\x08\xf8yo\xed1\xb83\x17\xb9\x10\xb4\x8f\x00\x17]D\xd2\xae\xfa\x87\x9f\xf7\xfa\x192\x971\xee'2\x83\x0fk\x03w\xbb0\xfcU\xc8\x89Zm\x8e\xba\xce \xfc\xde\xf2F\xdb\x0cI*\xe0\xaeN\xef\xc2\x9e\r", '@type': 'dht.keyDescription'}, 'value': {'@type': 'adnl.addressList', 'addrs': [{'@type': 'adnl.address.udp', 'ip': -1537433966, 'port': 3333}], 'version': 1694227845, 'reinit_date': 1694227845, 'priority': 0, 'expire_at': 0}, 'ttl': 1695832194, 'signature': b'z\x8aW\x80k\xceXQ\xff\xb9D{C\x98T\x02e\xef&\xfc\xb6\xde\x80y\xf7\xb4\x92\xae\xd2\xd0\xbakU}3\xfa\xec\x03\xb6v\x98\xb0\xcb\xe8\x05\xb9\xd0\x07o\xb6\xa0)I\x17\xcb\x1a\xc4(Dt\xe6y\x18\x0b', '@type': 'dht.value'}}

key = client.get_dht_key(id_=adnl.client.get_key_id())
ts = int(time.time())
value_data = {
    'addrs': [
        {
            "@type": "adnl.address.udp",
            "ip": 1111111,
            "port": 12000
        }
    ],
    'version': ts,
    'reinit_date': ts,
    'priority': 0,
    'expire_at': 0,
}

value = client.schemas.serialize(client.schemas.get_by_name('adnl.addressList'), value_data)

stored = await client.store_value(  # store our address list in dht as value
    key=key,
    value=value,
    private_key=adnl.client.ed25519_private.encode(),
    ttl=100,
    try_find_after=False
)

print(stored)  # True if value was stored, False otherwise

# disconnect from all peers
await client.close()