Stop Guessing. Start Proving. Formal Verification with Halmos скачать в хорошем качестве

Stop Guessing. Start Proving. Formal Verification with Halmos

https://x.com/shanzson https://x.com/zokyo_io https://x.com/opensensepw Tests are nice, but what if you could prove your contract won’t break? In this session, we fire up Halmos and go all in, from setup to writing specs, catching real bugs, and tearing through the DStable vault backdoor. No fluff. Just raw code, broken invariants, and receipts. It focuses only on real execution paths and finds bugs your tests can’t even reach. Timestamps 00:00:03 Why formal verification actually matters 00:00:26 What fuzzers miss — and Halmos doesn't 00:01:56 Installing the CLI & getting started 00:02:24 Writing your first spec with setup() 00:04:06 Loop constraints and cheat-codes 00:06:53 Sender/receiver conditions in specs 00:08:07 Basic preconditions and invariants 00:10:30 Filtering inputs with require 00:12:01 Handling arrays & edge cases 00:14:00 Avoiding noise in results 00:17:25 How Halmos narrows down execution paths 00:20:38 First full spec run 00:22:32 Dealing with reverts & assumptions 00:23:59 Overview of the built-in example suite 00:28:25 Finding and understanding your first bug 00:29:46 How Halmos picks counter-examples 00:34:06 Making counter-examples more readable 00:37:42 Building a low-level encoder spec 00:41:10 Macros and typed variable tricks 00:49:14 Another bug found — live 00:55:42 Kicking off the next example 00:57:25 Deep dive into the vault contract 00:59:17 Testing internal balances 01:02:08 Spotting a major logic flaw 01:05:13 Invariants that track over time 01:07:08 Testing those invariants in practice 01:11:29 Vault: backdoor breakdown 01:12:46 Writing a spec to catch the exploit 01:17:00 A bigger spec setup from scratch 01:21:35 Running the full test suite 01:25:32 Digging into the final bug 01:28:45 Best practices + common mistakes 01:30:04 Reviewing everything we used 01:31:10 Wrap-up & where to go next