Explore the world of blockchain security in this 38-minute conference talk that delves into common bug types found in the Substrate blockchain framework. Learn about the unique challenges blockchain bugs present for developers and security testers, and gain insights into five prevalent issue types based on hundreds of reported security incidents. Discover practical tips for testing blockchain systems and witness a live demonstration of a newly released fuzzer for Substrate-based chains. Watch as the speakers showcase typical bugs, including arithmetic errors and reachable panics, while promoting accessibility to blockchain hacking.