Fix api resopnse format for recommended fee

common/fee.go

@@ -22,9 +22,9 @@ var FeeFactorLsh60 [256]*big.Int
 // the coordinator according to the tx type (if the tx requires to create an
 // account and register, only register or he account already esists)
 type RecommendedFee struct {
-	ExistingAccount           float64
-	CreatesAccount            float64
-	CreatesAccountAndRegister float64
+	ExistingAccount           float64 `json:"existingAccount"`
+	CreatesAccount            float64 `json:"createAccount"`
+	CreatesAccountAndRegister float64 `json:"createAccountInternal"`
 }
 
 // FeeSelector is used to select a percentage from the FeePlan.