XRP Ledger Lending Protocol Undergoes Formal Verification to Prove Immunity

Common Prefix is working to mathematically prove that the XRP Ledger Lending Protocol cannot be drained, become insolvent, or break its rules. This formal verification process goes beyond standard software testing by using mathematics to prove that a system works correctly in all possible situations.

The team is focusing on the Lending Protocol introduced through XLS-66 and is using Lean 4 for the verification process. Common Prefix explained its approach in a six-part series, including why it chose Lean 4.

According to Vet, an XRP Ledger validator, formal verification is already used in high-risk systems such as military technology, air traffic software, flight controls, and nuclear power plants.

The team considered several tools, including Dafny, Lean 4, TLA+, and P. However, they decided that Lean 4 was the best fit for their specific questions due to its flexibility and ability to connect with C-based software.