Frontend first draft

frontend/pweb/lib/utils/currency.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/models/currency.dart';
+
+
+String currencyCodeToSymbol(Currency currencyCode) {
+  switch (currencyCode) {
+    case Currency.usd:
+      return '\$';
+    case Currency.eur:
+      return '€';
+    case Currency.rub:
+      return '₽';
+    case Currency.usdt:
+      return 'USDT';
+    case Currency.usdc:
+      return 'USDC';
+  }
+}
+
+String currencyToString(Currency currencyCode, double amount) {
+  return '${amount.toStringAsFixed(2)} ${currencyCodeToSymbol(currencyCode)}';
+}
+
+IconData iconForCurrencyType(Currency currencyCode) {
+  switch (currencyCode) {
+    case Currency.usd:
+      return Icons.currency_exchange;
+    case Currency.eur:
+      return Icons.currency_exchange;
+    case Currency.rub:
+      return Icons.currency_ruble;
+    case Currency.usdt:
+      return Icons.currency_exchange;
+    case Currency.usdc:
+      return Icons.money;
+  }
+}