uniswap-python

The unofficial Python client for Uniswap.

Documentation is available at https://uniswap-python.com/

Want to help implement support for Uniswap v4? See issue #337

Functionality

• A simple to use Python wrapper for all available contract functions and variables
• A basic CLI to get prices and token metadata
• Simple parsing of data returned from the Uniswap contract

Supports

• Uniswap v3 (as of v0.5.0)
  • Including beta support for Arbitrum & Optimism deployments (as of v0.5.4)
• Uniswap v2 (as of v0.4.0)
• Uniswap v1 (deprecated)
• Various forks (untested, but should work)
  • Honeyswap (xDai)
  • Pancakeswap (BSC)
  • Sushiswap (mainnet)

Getting Started

See our Getting started guide in the documentation.

Testing

Unit tests are under development using the pytest framework. Contributions are welcome!

Test are run on a fork of the main net using ganache-cli. You need to install it with npm install -g ganache-cli before running tests.

To run the full test suite, in the project directory set the PROVIDER env variable to a mainnet provider, and run:

poetry install
export PROVIDER= # URL of provider, e.g. https://mainnet.infura.io/v3/...
make test
# or...
poetry run pytest --capture=no  # doesn't capture output (verbose)

Support our continued work!

You can support us on Gitcoin Grants.

Authors

• Shane Fontaine
• Erik Bjäreholt
• @liquid-8
• …and others

Want to help out with development? We have funding to those that do! See #181

Contributors also earn this beautiful GitPOAP for their contributions!

Changelog

0.7.2

• Updated: Default fee is not applied when using Uniswap V3. Default fee for Uniswap V1 and V2 is still 0.3%.
• Updated: InvalidFeeTier exception is raised when a tier is not supported by the protocol version. See all supported tiers in uniswap.fee.FeeTier

0.7.1

• incomplete changelog

0.7.0

• incomplete changelog

0.5.4

• added use of gas estimation instead of a fixed gas limit (to support Arbitrum)
• added use_estimate_gas constructor argument (used in testing)
• added constants/basic support for Arbitrum, Optimism, Polygon, and Fantom. (untested)
• incomplete changelog

0.5.3

• incomplete changelog

0.5.2

• incomplete changelog

0.5.1

• Updated dependencies
• Fixed minor typing issues

0.5.0

• Basic support for Uniswap V3
• Added new methods get_price_input and get_price_output
• Made a lot of previously public methods private
• Added documentation site
• Removed ENS support (which was probably broken to begin with)

0.4.6

• Bug fix: Update bleach package from 3.1.4 to 3.3.0

0.4.5

• Bug fix: Use .eth instead of .ens

0.4.4

• General: Add new logo for Uniswap V2
• Bug fix: Invalid balance check (#25)
• Bug fix: Fixed error when passing WETH as token

0.4.3

• Allow kwargs in approved decorator.

0.4.2

• Add note about Uniswap V2 support

0.4.1

• Update changelog for PyPi and clean up

0.4.0

A huge thank you Erik Bjäreholt for adding Uniswap V2 support, as well as all changes in this version!

• Added support for Uniswap v2
• Handle arbitrary tokens (by address) using the factory contract
• Switched from setup.py to pyproject.toml/poetry
• Switched from Travis to GitHub Actions
• For CI to work in your repo, you need to set the secret MAINNET_PROVIDER. I use Infura.
• Running tests on a local fork of mainnet using ganache-cli (started as a fixture)
• Fixed tests for make_trade and make_trade_output
• Added type annotations to the entire codebase and check them with mypy in CI
• Formatted entire codebase with black
• Moved stuff around such that the basic import becomes from uniswap import Uniswap (instead of from uniswap.uniswap import UniswapWrapper)
• Fixed misc bugs

0.3.3

• Provide token inputs as addresses instead of names

0.3.2

• Add ability to transfer tokens after a trade
• Add tests for this new functionality

0.3.1

• Add tests for all types of trades

0.3.0

• Add ability to make all types of trades
• Add example to README

0.2.1

• Add liquidity tests

0.2.0

• Add liquidity and ERC20 pool methods

0.1.1

• Major README update

0.1.0

• Add market endpoints
• Add tests for market endpoints