init

backend/src/modules/xmrRate/dto/CoingeckoSimplePriceResponseDto.ts

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+import {
+    IsEnum,
+    IsNotEmpty,
+    IsObject,
+    Validate,
+    ValidatorConstraint,
+    type ValidatorConstraintInterface,
+    type ValidationArguments
+} from 'class-validator';
+import { ShopFiatCurrency } from '../../../types/ShopFiatCurrency';
+
+@ValidatorConstraint({ name: 'coingeckoMoneroFiat' })
+class CoingeckoMoneroFiatConstraint implements ValidatorConstraintInterface {
+    validate(monero: Record<string, number>, args: ValidationArguments): boolean {
+        const { shopFiatCurrency } = args.object as CoingeckoSimplePriceResponseDto;
+
+        if (!shopFiatCurrency) {
+            return false;
+        }
+
+        const rate = monero[shopFiatCurrency.toLowerCase()];
+
+        return typeof rate === 'number' && Number.isFinite(rate) && rate > 0;
+    }
+
+    defaultMessage(): string {
+        return 'CoinGecko monero fiat rate must be a positive number';
+    }
+}
+
+export class CoingeckoSimplePriceResponseDto {
+    @IsEnum(ShopFiatCurrency)
+    shopFiatCurrency: ShopFiatCurrency;
+
+    @IsNotEmpty()
+    @IsObject()
+    @Validate(CoingeckoMoneroFiatConstraint)
+    monero: Record<string, number>;
+}