DeFiPy 1.0.10

Python SDK for DeFi Analytics, Simulation, and Agents

DeFiPy: Python SDK for DeFi Analytics and Agents

DeFiPy is the first unified Python SDK for DeFi analytics, simulation, and autonomous agents. Built with modularity in mind, DeFiPy lets you isolate and extend your analytics by protocol using:

• UniswapPy
• BalancerPy
• StableSwapPy

For onchain event access and scripting, pair it with Web3Scout — a companion tool for decoding pool events and interfacing with Solidity contracts. Whether you’re building dashboards, simulations, or agent-based trading systems, DeFiPy + Web3Scout deliver a uniquely powerful toolset — unlike anything else in the ecosystem.

Docs

Visit DeFiPy docs for full documentation with walk-through tutorials

Install

Must first install gmpy2 python package to handle the precision within the StableSwap protocol (requires CPython 3.7 or above). To install the latest release with pip:

> pip install gmpy2

Also, in many cases will need to have required libraries (GMP, MPFR and MPC) already installed on your system, see gmpy2 installation docs for more info. Once setup, install the latest release of DeFiPy with pip:

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

or

> pip install defipy

Uniswap V2 Example

To setup a liquidity pool, you must first create the tokens in the pair using the ERC20 object. Next, create a liquidity pool (LP) factory using IFactory object. Once this is setup, an unlimited amount of LPs can be created; the procedures for such are as follows:

from defipy import *

# Step 1: Define tokens
tkn = ERC20("TKN", "0x111")
eth = ERC20("ETH", "0x999")

# Step 2:  Initialize factory
factory = UniswapFactory("ETH pool factory", "0x2")

# Step 3: Set up exchange data for V2
exch_data = UniswapExchangeData(tkn0=eth, tkn1=tkn, symbol="LP", address="0x3")

# Step 4: Deploy pool
lp = factory.deploy(exch_data)

# Step 5: Add initial liquidity
join = Join()
join.apply(lp, "user", 1000, 10000)

# Step 6: Perform swap
swap = Swap()
out = swap.apply(lp, tkn, "user", 10)

# Check reserves and liquidity
lp.summary()    

# OUTPUT:
Exchange ETH-TKN (LP)
Reserves: ETH = 999.00399301896, TKN = 10010.0
Liquidity: 3162.2776601683795 

Uniswap V3 Example

from defipy import *

# Step 1: Define tokens and parameters
eth = ERC20("ETH", "0x93")
tkn = ERC20("TKN", "0x111")
tick_spacing = 60
fee = 3000  # 0.3% fee tier

# Step 2: Set up exchange data for V3
exch_data = UniswapExchangeData(tkn0=eth, tkn1=tkn, symbol="LP", address="0x811", version='V3', tick_spacing=tick_spacing, fee=fee)

# Step 3: Initialize factory
factory = UniswapFactory("ETH pool factory", "0x2")

# Step 4: Deploy pool
lp = factory.deploy(exch_data)

# Step 5: Add initial liquidity within tick range
lwr_tick = UniV3Utils.getMinTick(tick_spacing)
upr_tick = UniV3Utils.getMaxTick(tick_spacing)
join = Join()
join.apply(lp, "user", 1000, 10000, lwr_tick, upr_tick)

# Step 6: Perform swap
swap = Swap()
out = swap.apply(lp, tkn, "user", 10)

# Check reserves and liquidity
lp.summary()

# OUTPUT:
Exchange ETH-TKN (LP)
Real Reserves:   ETH = 999.0039930189599, TKN = 10010.0
Gross Liquidity: 3162.277660168379  

Balancer Example

from defipy import *

# Step 1: Define tokens
dai = ERC20("DAI", "0x111")
usdc = ERC20("USDC", "0x999")

# Step 2: Deposit token amounts
dai.deposit(None, 10000)
usdc.deposit(None, 20000)

# Step 3: Setup vault
vault = BalancerVault()
vault.add_token(dai, 10)  # Denormalized weight for DAI
vault.add_token(usdc, 40)  # Denormalized weight for WETH

# Step 4: Set up exchange data for Balancer
exch_data = BalancerExchangeData(vault=vault, symbol="BSP", address="0x3")

# Step 5: Initialize factor for Balancer
bfactory = BalancerFactory("WETH pool factory", "0x2")

# Step 6: Deploy pool
lp = bfactory.deploy(exch_data)

# Step 7: Join pool with initial liquidity
join = Join()
join.apply(lp, "user", 100) # Issue 100 pool shares

# Step 8: Perform swap
swap = Swap(Proc.SWAPIN)
out = swap.apply(lp, dai, usdc, "user", 10)

# Check reserves and liquidity
lp.summary()

# OUTPUT:
Balancer Exchange: DAI-USDC (BSP)
Reserves: DAI = 9979.92478694547, USDC = 20010
Weights: DAI = 0.2, USDC = 0.8
Pool Shares: 100 

StableSwap Example

from defipy import *

# Step 1: Define stablecoins and parameters
dai = ERC20("DAI", "0x111", 18)
usdc = ERC20("USDC", "0x222", 6)
AMPL_COEFF = 2000

# Step 2: Deposit token amounts
dai.deposit(None, 10000)
usdc.deposit(None, 20000)

# Step 3: Setup Stableswap vault and add tokens
sgrp = StableswapVault()
sgrp.add_token(dai)
sgrp.add_token(usdc)

# Step 4: Set up exchange data for Stableswap
exch_data = StableswapExchangeData(vault = sgrp, symbol="LP", address="0x011")

# Step 5: Initialize factor for Balancer
factory = StableswapFactory("Stableswap factory", "0x2")

# Step 6: Deploy pool
lp = factory.deploy(exch_data)

# Step 7: Join pool with initial liquidity
join = Join()
join.apply(lp, "user", AMPL_COEFF)

# Step 8: Perform swap
swap = Swap()
out = swap.apply(lp, dai, usdc, "user", 10)

# Check reserves and liquidity
lp.summary()

# OUTPUT:
Stableswap Exchange: DAI-USDC (LP)
Reserves: DAI = 10010, USDC = 19989.996791
Liquidity: 29999.063056285642 

0x Quant Terminal

This application utilizes the 0x API to produce a mock Uniswap pool which allows end-users to stress test the limitations of a Uniswap pool setup using live price feeds from 0x API; for backend setup, see notebook

Click dashboard.defipy.org for live link; for more detail see README

Run application locally

> bokeh serve --show python/application/quant_terminal/bokeh_server.py

License

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.