Deploy payment proxies on Base Sepolia

[MantisClone]

Problem

We want a backup payment chain for testing when Sepolia is not working.

Solution

Deploy the payment proxies to Base Sepolia

Considerations

We also considered Polygon Amoy and opBNB.

• We rejected opBNB due to the low number of dapps, despite the large number of transactions.
• We chose Base Sepolia because Base seems to be growing faster than Polygon.
• Base rank 9 and Polygon rank 10 on the DappRadar Chains table sorted by Transaction count.
• We chose Base Sepolia even though Polygon has a larger number of dapps.

Challenge

• Does Base Sepolia continue processing transactions even when Sepolia has issues? 🤔

Answer

• Yes! From what I can tell, Base continued processing transactions during the Sepolia Pectra Incident.
• I sampled Base Sepolia Blocks every hour for the past 12 hours. All blocks have transactions.
• I sampled Base Sepolia Transaction Batches and noticed a 4 hour gap (see attached screenshot) - but this doesn't seem to affect transaction processing.

According to AI:

• Base Sepolia's ability to continue processing transactions despite issues with Sepolia is likely due to the design principles of Optimistic Rollups and layer 2 solutions. These include independent transaction processing, batch submission, fraud proof mechanisms, and fallback plans.

Context

• Sepolia Pectra Incident: Sepolia stopped processing new transactions for 7 hours after the Pectra upgrade earlier today.
• During that time, creating or paying requests on Sepolia was impossible.
• We could still create requests on Gnosis and we could still pay requests on all non-Sepolia chains.
• This impacted EasyInvoice which was configured to only allow payments on Sepolia.
• This impacted Request API which creates requests on Sepolia IF the payment chain is a testnet.