fix(native): fixed BTC fees rounding, correct decimal pad for custom fee

Author: OriginalEveres

suite-native/transaction-management/src/components/fees/CustomFee/CustomFeeInputs.tsx

@@ -70,7 +70,7 @@ export const CustomFeeInputs = ({ symbol }: CustomFeeInputsProps) => {
                 name={feePerUnitFieldName}
                 testID={`@transactionManagement/${feePerUnitFieldName}-input`}
                 accessibilityLabel="address input"
-                keyboardType="number-pad"
+                keyboardType={networkType === 'bitcoin' ? 'decimal-pad' : 'number-pad'}
                 rightIcon={<Text color="textSubdued">{feeUnits}</Text>}
                 onChangeText={handleFieldChangeValue(feePerUnitFieldName, cryptoAmountTransformer)}
             />

suite-native/transaction-management/src/components/fees/FeeOptionList/FeeOption.tsx

@@ -62,20 +62,20 @@ const valuesWrapperStyle = prepareNativeStyle(utils => ({
 const getFeePerUnit = ({
     networkType,
     feeLevel,
-    transactionBytes,
     backendFeePerUnit = '0',
 }: {
     networkType: NetworkType;
     feeLevel: GeneralPrecomposedTransaction;
-    transactionBytes: number;
     backendFeePerUnit: string;
 }): string => {
     if (!isFinalPrecomposedTransaction(feeLevel)) {
         return backendFeePerUnit;
     }
 
     if (networkType === 'bitcoin') {
-        return String(Math.round(Number(feeLevel.fee) / transactionBytes));
+        return Number.isInteger(Number(feeLevel.feePerByte))
+            ? feeLevel.feePerByte
+            : Number(feeLevel.feePerByte).toFixed(2);
     }
 
     return feeLevel.feePerByte;
@@ -138,7 +138,6 @@ export const FeeOption = ({
     const feePerUnit = getFeePerUnit({
         networkType,
         feeLevel,
-        transactionBytes,
         backendFeePerUnit: backendFeePerUnit ?? '0',
     });