Free online eos smart contract security aduit https://scan.stargenesis.io/
https://scan.stargenesis.io/ support eos and ether smart contract audit. It can support five types eos security issuses checker included integer overflow，transfer require_auth，EOSIO_ABI_EX apply ，transfer to check，find iter check.
usage: zip hpp and cpp to package and upload this zip package by EOS tab
EosBet security issuse come form https://medium.com/@eoscafeblock/contract-vulnerability-patch-57b948cacc3a
this example code come from https://gitlab.com/EOSBetCasino/eosbetdice_public/blob/master/EOSBetDice.cpp