refactor confirmation tiers to shared crypto-agnostic types and validation

backend/src/utils/monero/resolveMinConfirmations.spec.ts

@@ -1,21 +0,0 @@
-import { resolveMinConfirmations } from './resolveMinConfirmations';
-
-const tiers = [
-    { upToTotalFiat: '25', minConfirmations: 0 },
-    { upToTotalFiat: '250', minConfirmations: 5 },
-    { minConfirmations: 10 }
-] as const;
-
-describe('resolveMinConfirmations', () => {
-    it('returns 0 for small orders (tx-detected tier)', () => {
-        expect(resolveMinConfirmations(10, [...tiers])).toBe(0);
-    });
-
-    it('returns the middle tier for medium orders', () => {
-        expect(resolveMinConfirmations(100, [...tiers])).toBe(5);
-    });
-
-    it('returns the catch-all tier for large orders', () => {
-        expect(resolveMinConfirmations(500, [...tiers])).toBe(10);
-    });
-});

backend/src/utils/monero/resolveMinConfirmations.ts

@@ -1,16 +0,0 @@
-import Decimal from 'decimal.js';
-import type { MoneroConfirmationTier } from '../../types/MoneroConfirmationTier';
-
-export const resolveMinConfirmations = (totalFiat: number, tiers: MoneroConfirmationTier[]): number => {
-    for (const tier of tiers) {
-        if (tier.upToTotalFiat === undefined) {
-            return tier.minConfirmations;
-        }
-
-        if (new Decimal(totalFiat).lte(tier.upToTotalFiat)) {
-            return tier.minConfirmations;
-        }
-    }
-
-    return tiers[tiers.length - 1].minConfirmations;
-};