User-Friendly Python Wrapper for Universal Router v4 Swaps

[snarflakes]

Hi Uniswap Universal Router Decoder Team,

I recently built a Python-based script that makes it much easier to execute SWAP_EXACT_IN swaps using Uniswap v4 Universal Router on L2. It acts as a user-friendly wrapper around your impeccable decoder, allowing users to swap tokens by simply plugging in their token addresses, amounts, and ABIs.

Why This is Useful for Your Users:

• Provides an easy-to-use example of how to integrate Uniswap Universal Router decoding in real swaps.
• Reduces the complexity of constructing transactions manually.
• Works with both v3 pools (i'm going to start testing on v4 pools soon) on L2 networks.
• Gas setting should work on all L2s
• Simple method to unstick a transaction trapped in mempool or actually stuck

Here’s the repo: https://github.com/snarflakes/uniswap-python-swapper

I’d love for my work to help your community—whether as an external resource or directly in your repo. Do you see more value in linking to my repo or integrating it into your codebase?

Thanks for building such a great tool—looking forward to your thoughts!

Best,
Snar

[Elnaril]

Hello @snarflakes

That's great!
Indeed, I do believe there is room for building ad-hoc solutions around the UR SDK, depending on specific use cases.
Adding a layer to abstract away the L2 addresses is definitively one of them.
I even considered to manage it in the SDK at the beginning of the project, but I chose to implement only the possibility to override Mainnet's defaults.

On a side note, I noticed you used .build_transaction() for the V4 swaps, but not for the V3 ones where you use the SDK to encode the input data, and then build the transaction manually. Is there a reason? Asking just in case I can improve this feature.

Also, it seems there's a broken link at the end of your README ;)

Happy coding! :)

[snarflakes]

Fixed the broken link! Thanks for your support.

I think your strategy is excellent, focus on one critical thing extremely well. For example uniswap-python lack of support for Base couldn't be fixed because there was too much of a complete code restructure needed because it is so large and covers so much different terrain.

I will double check v4 pool .build_transaction() (it is just a place holder). I was waiting for more liquidity to shift to v4 before testing the V4 swaps so i can test all L2 chains at once. I will get back to you on .build_transaction!