@interface FinHealthRecurringHelper : NSObject + (id)histogramKeysForCardPurchaseTransaction:(id)a0 transactionAmount:(id)a1 transactionType:(long long)a2 amountFromDatabase:(long long)a3; + (id)histogramKeysForPeerPaymentTransaction:(id)a0 transactionAmount:(id)a1 transactionPeerPaymentSubtype:(long long)a2 amountFromDatabase:(long long)a3; + (id)histogramKeysForTopUpTransaction:(id)a0 amountFromDatabase:(long long)a1; + (id)histogramKeysForTransaction:(id)a0; + (id)rootMeanSquareError:(id)a0; + (id)rootMeanSquareError:(id)a0 decimalKey:(id)a1 startIndex:(unsigned long long)a2 arrayLength:(unsigned long long)a3 decimalDenominator:(id)a4; + (id)rootMeanSquareError:(id)a0 startIndex:(unsigned long long)a1 arrayLength:(unsigned long long)a2; + (void)rootMeanSquareErrorForSlidingWindowWithCompletion:(id)a0 slidingWindowWidth:(unsigned long long)a1 decimalThreshold:(id)a2 decimalDenominator:(id)a3 decimalKeyEntry:(id)a4 completion:(id /* block */)a5; @end