Can't build standalone app after eject


#1

I published the application in the play market via expo. Now i have the keys saved in the .jks (java keystore) format. I did the expo eject, but now I can’t even run in the simulator, so I dragged the entire project to react-native init.
https://facebook.github.io/react-native/docs/signed-apk-android. It says that you must first generate the keys, but they are stored in the .keystore format.How build apk file using old keys(.jks) and update app in play market?And with ios I have same problem.
Who had the same problem?