package Ġiv . nak one ch ny i . exchange . db Ċ Ċ import Ġandroidx . room .* Ċ import Ġiv . nak one ch ny i . exchange . model . Convert Operation Ċ Ċ @ Dao Ċ interface ĠHistory Dao Ġ{ ĊĊĠĠĠ Ġ@ Query (" SELECT Ġ* ĠFROM Ġconvert _ history ") ĊĠĠĠ Ġsuspend Ġfun ĠgetAll Records (): ĠList < Convert Operation > ĊĊĠĠĠ Ġ@ Insert ( on Conflict Ġ= ĠOn Conflict Strategy . IGNORE ) ĊĠĠĠ Ġsuspend Ġfun Ġsave Operation ( operation : ĠConvert Operation ): ĠLong ĊĊĠĠĠ Ġ@ Delete ĊĠĠĠ Ġfun Ġdelete ( op : ĠConvert Operation ): ĠInt Ċ }