Web3Scout 0.2.0

Onchain Event Framework for DeFiPy

Web3Scout: Onchain Event Framework for DeFiPy

🔗 SPDX-Anchor: anchorregistry.ai/AR-2026-5RJKqw5

Installation

> git clone https://github.com/defipy-devs/web3scout
> pip install .

or

> pip install Web3Scout

Uni V2 Swap Events (Polygon) Example

from web3scout import *

abi = ABILoad(Platform.SUSHI, JSONContract.UniswapV2Pair)
connect = ConnectW3(Net.POLYGON)
connect.apply()

rEvents = RetrieveEvents(connect, abi)
last_block = rEvents.latest_block()
start_block = last_block - 3
dict_events = rEvents.apply(EventType.SWAP, start_block=start_block, end_block=last_block)

swap at block:61,234,918 tx:0x9f16c76b6a83ac424ea736fb7dd2b1fc735888f222ee04dc1b1f7b933469faf8
swap at block:61,234,918 tx:0x9f16c76b6a83ac424ea736fb7dd2b1fc735888f222ee04dc1b1f7b933469faf8
swap at block:61,234,918 tx:0x9f16c76b6a83ac424ea736fb7dd2b1fc735888f222ee04dc1b1f7b933469faf8
swap at block:61,234,918 tx:0x9f16c76b6a83ac424ea736fb7dd2b1fc735888f222ee04dc1b1f7b933469faf8
.

dict_events

{0: {'chain': 'polygon',
  'contract': 'uniswapv2pair',
  'type': 'swap',
  'platform': 'sushi',
  'address': '0x604229c960e5cacf2aaeac8be68ac07ba9df81c3',
  'tx_hash': '0x9f16c76b6a83ac424ea736fb7dd2b1fc735888f222ee04dc1b1f7b933469faf8',
  'blk_num': 61234918,
  'timestamp': 1725051030,
  'details': {'web3_type': web3._utils.datatypes.Swap,
   'token0': '0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff',
   'token1': '0xbF6f53423F25Df43a057F42A840158D6fDdB45BF',
   'amount0In': 19000000000000000000,
   'amount1Out': 7889648}},
 1: {'chain': 'polygon',
  'contract': 'uniswapv2pair',
  'type': 'swap',
  'platform': 'sushi',
  'address': '0x604229c960e5cacf2aaeac8be68ac07ba9df81c3',
  'tx_hash': '0x9f16c76b6a83ac424ea736fb7dd2b1fc735888f222ee04dc1b1f7b933469faf8',
  'blk_num': 61234918,
  'timestamp': 1725051030,
  'details': {'web3_type': web3._utils.datatypes.Swap,
   'token0': '0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff',
   'token1': '0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff',
   'amount0In': 0,
   'amount1Out': 0}},
 2: {'chain': 'polygon',
  'contract': 'uniswapv2pair',
  'type': 'swap',
  'platform': 'sushi',
  'address': '0x3c986748414a812e455dcd5418246b8fded5c369',
  'tx_hash': '0x9f16c76b6a83ac424ea736fb7dd2b1fc735888f222ee04dc1b1f7b933469faf8',
  'blk_num': 61234918,
  'timestamp': 1725051030,
  'details': {'web3_type': web3._utils.datatypes.Swap,
   'token0': '0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff',
   'token1': '0xbF6f53423F25Df43a057F42A840158D6fDdB45BF',
   'amount0In': 21176176598530377323,
   'amount1Out': 796785880798504079}},
 3: {'chain': 'polygon',
  'contract': 'uniswapv2pair',
  'type': 'swap',
  'platform': 'sushi',
  'address': '0x3c986748414a812e455dcd5418246b8fded5c369',
  'tx_hash': '0x9f16c76b6a83ac424ea736fb7dd2b1fc735888f222ee04dc1b1f7b933469faf8',
  'blk_num': 61234918,
  'timestamp': 1725051030,
  'details': {'web3_type': web3._utils.datatypes.Swap,
   'token0': '0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff',
   'token1': '0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff',
   'amount0In': 0,
   'amount1Out': 0}}}

Uni V3 Swap Events (Polygon) Example

from web3scout import *

abi = ABILoad(Platform.UNIV3, JSONContract.UniswapV3Pool)
connect = ConnectW3(Net.POLYGON)
connect.apply()

rEvents = RetrieveEvents(connect, abi)
last_block = rEvents.latest_block()
start_block = last_block - 15
dict_events = rEvents.apply(EventType.MINT, start_block=start_block, end_block=last_block)

mint at block:61,391,083 tx:0xe499971b5410e766d00bf4467c6b333cda04577f1068bb676debe72331254365
mint at block:61,391,092 tx:0x29d53602b1bbd67734c2e3deba8ad0a55aa84204a6244e720f24ee5160505213
.

dict_events

{0: {'chain': 'polygon',
  'contract': 'uniswapv3pool',
  'type': 'mint',
  'platform': 'uniswap_v3',
  'pool_address': '0xb6e57ed85c4c9dbfef2a68711e9d6f36c56e0fcb',
  'tx_hash': '0xe499971b5410e766d00bf4467c6b333cda04577f1068bb676debe72331254365',
  'blk_num': 61391083,
  'timestamp': 1725401207,
  'details': {'web3_type': web3._utils.datatypes.Mint,
   'owner': '0xC36442b4a4522E871399CD717aBDD847Ab11FE88',
   'tick_lower': -286090,
   'tick_upper': -284860,
   'liquidity_amount': 884887839988325,
   'amount0': 39958320744269616249,
   'amount1': 17912626}},
 1: {'chain': 'polygon',
  'contract': 'uniswapv3pool',
  'type': 'mint',
  'platform': 'uniswap_v3',
  'pool_address': '0x960fdfe0de1079459493a7e3aa857f8ce0b34016',
  'tx_hash': '0x29d53602b1bbd67734c2e3deba8ad0a55aa84204a6244e720f24ee5160505213',
  'blk_num': 61391092,
  'timestamp': 1725401227,
  'details': {'web3_type': web3._utils.datatypes.Mint,
   'owner': '0xC36442b4a4522E871399CD717aBDD847Ab11FE88',
   'tick_lower': 22600,
   'tick_upper': 40000,
   'liquidity_amount': 7675592444129481120,
   'amount0': 64052149877205455,
   'amount1': 29656680135133456015}}}

Sushi Uniswap V2: Polygon

• Events (ie, Swap, Mint, Sync, Burn, Transfer): see notebook

Uniswap V3: Polygon

• Events (ie, Swap, Mint, Burn, Create): see notebook

Testing

Run the full test suite from the repo root:

> python -m pytest tests/ -v

Tests cover bug fixes and regression checks across:

• conversion — hex/bytes string conversion
• fetch_token — error handling in token metadata fetches
• deploy — contract deployment class references
• abi_load — import path corrections
• reorg_monitor — chain reorganization monitoring imports
• block_header — BlockHeader dataclass (extracted from eth_defi)
• token — ERC-20 token creation
• base_utils — port scanning utilities

Requirements

> pip install pytest

License

Web3Scout is licensed under the Apache License, Version 2.0.
See LICENSE and NOTICE for details.
Portions of this project may include code from third-party projects under compatible open-source licenses.