The Rust-Lightning project has introduced end-to-end and payer-side tests to enhance the verification processes for currency-denominated offers and invoices. This update consolidates coverage for standard payment flows, handles excessive invoice rejections, and addresses unverifiable fiat invoices when conversion support is unavailable. It also includes tests for quantity-scaled invoice requests, ensuring robust verification paths for currency-denominated offers. The tests were developed with AI assistance, specifically OpenAI Codex.