Merge pull request #1762 from AlphaWallet/display-token-balance-4-decimal-places

Make token balance displayed be always 4 decimal places, except for send confirmation and transaction details screen and for fiat to be 2 decimal places. Rounding down is always used

AlphaWallet/Accounts/ViewModels/AccountViewModel.swift

@@ -22,7 +22,7 @@ struct AccountViewModel {
         return wallet.type == .watch(wallet.address)
     }
     var balance: String {
-        let amount = walletBalance?.amountFull ?? "--"
+        let amount = walletBalance?.amountShort ?? "--"
         return "\(amount) \(server.symbol)"
     }
     var address: AlphaWallet.Address {

AlphaWallet/Core/Formatters/CurrencyFormatter.swift

@@ -7,6 +7,7 @@ class CurrencyFormatter {
         let formatter = NumberFormatter()
         formatter.minimumFractionDigits = 2
         formatter.maximumFractionDigits = 2
+        formatter.roundingMode = .down
         //TODO support multiple currency values
         formatter.currencyCode = Currency.USD.rawValue
         formatter.numberStyle = .currency

AlphaWallet/Foundation/StringFormatter.swift

@@ -9,6 +9,7 @@ final class StringFormatter {
         formatter.currencySymbol = ""
         formatter.minimumFractionDigits = 2
         formatter.maximumFractionDigits = 2
+        formatter.roundingMode = .down
         formatter.numberStyle = .currencyAccounting
         formatter.isLenient = true
         return formatter

AlphaWallet/Transactions/ViewModels/BalanceTokenViewModel.swift

@@ -14,7 +14,7 @@ struct BalanceTokenViewModel: BalanceBaseViewModel {
     }
 
     var amountShort: String {
-        return EtherNumberFormatter.full.string(from: token.valueBigInt, decimals: token.decimals)
+        return EtherNumberFormatter.short.string(from: token.valueBigInt, decimals: token.decimals)
     }
 
     var name: String {