Hey everyone, in the world of payment systems, "reconciliation" is always the biggest headache. The core question is simple: "Has this specific invoice been paid?" To tackle this issue, traditional Web3 payment systems often need to set up a bulky backend: a database mapping invoices to amounts, a Webhook to monitor transfers across various chains, a scheduled task for handling chargebacks, and even customer support.
Not to mention in this multi-chain era, users might pay from Arbitrum, Optimism, or Polygon, which skyrockets the complexity of reconciliation.