feat(smart-contracts): UP/UDT swap contract

[clemsos]

Description

This is a contract to swap UDT for UP

Issues

Fixes #
Refs #

Checklist:

• 1 PR, 1 purpose: my Pull Request applies to a single purpose
• I have commented my code, particularly in hard-to-understand areas
• I have updated the docs to reflect my changes if applicable
• I have added tests (and stories for frontend components) that prove my fix is effective or that my feature works
• I have performed a self-review of my own code
• If my code involves visual changes, I am adding applicable screenshots to this thread

Release Note Draft Snippet

[clemsos]

relates to #13875

[clemsos]

Tokens on Base Sepolia:

• UDT: https://sepolia.etherscan.io/address/0x447B1492C5038203f1927eB2a374F5Fcdc25999d
• UPToken: https://sepolia.basescan.org/address/0xc9F29DdBD4D828cFb2EB491E9d48013a9c0E3C89
• Swap contract: https://sepolia.basescan.org/address/0xaB82D702A4e0cD165072C005dc504A21c019718F

Try the workflow

1. Bridge UDT to Base Sepolia

• UDT on Sepolia: https://sepolia.etherscan.io/address/0x447B1492C5038203f1927eB2a374F5Fcdc25999d
• Bridge UDT: https://superbridge.app/base-sepolia

2. Swap UDT for UP token

• Approve Swap to spend UDT on Base Sepolia: https://sepolia.basescan.org/token/0x68a8011d72E6D41bf7CE9dC49De0aeaEBAAC9b39#writeContract
• Swap UDT for Up: https://sepolia.basescan.org/address/0xaB82D702A4e0cD165072C005dc504A21c019718F

example tx: https://sepolia.basescan.org/tx/0x024c51dc08912ed0403f9dc26b3f94e9dc760c0ce64fa9ce68acfe41f19fcdb3

[julien51]

ok @bytes032, this is the PR in which we're adding the contract to be audited. Please bear with us as we're cleaning this up!

[julien51]

@clemsos please confirm we need to rebase after #13875 has been merged?

[clemsos]

@clemsos please confirm we need to rebase after #13875 has been merged?

Yes I just merged and rebased

[julien51]

Hey @marvinkruse please check this PR regarding the audit!

[marvinkruse]

Hey @julien51 - thank you for tagging me, checking it out!