The originally hack was caused by the fact that Silk Road was running PHP on MySQL without transaction isolation. Many early crypto exchanges had similar withdrawal bugs as they were running on LAMP stacks - MySQL has been notoriosly famous for having lax transaction isolation. Sometimes you could overwithdraw just by hitting refresh fast enough in a web browser.
If you deal with money use PostgreSQL + SERIALIZABLE transaction isolation level to be sure.
Also Zhong was 22 years old script kiddie when he hacked Silk Road. Any smart criminal would have left United States long time ago if you sit on the top of $3B stash.
If you deal with money use PostgreSQL + SERIALIZABLE transaction isolation level to be sure.
More in PostgreSQL documentation https://www.postgresql.org/docs/current/transaction-iso.html
Also Zhong was 22 years old script kiddie when he hacked Silk Road. Any smart criminal would have left United States long time ago if you sit on the top of $3B stash.