Release: develop -> main

.env.example

@@ -16,6 +16,19 @@ MAX_BLOCKS_PER_BATCH=1000
 PRICE_CACHE_TTL_MS=120000
 PG_MAX_CLIENTS=10
 
+# CoinGecko Configuration.
+#
+# COINGECKO_BASE_URL: required. The origin the service calls. Recommended is
+# the in-cluster pricing-proxy (https://github.com/DFXswiss/pricing-proxy),
+# which holds the upstream Pro key and serves a 60 s shared cache. Anything
+# CoinGecko-compatible works (pro-api.coingecko.com, api.coingecko.com, …).
+COINGECKO_BASE_URL=http://pricing-proxy:8080/coingecko
+#
+# COINGECKO_API_KEY: optional. If set, attached as `x-cg-pro-api-key` to every
+# request. Leave unset when talking to the pricing-proxy (proxy injects its
+# own key) or to the public host anonymously.
+# COINGECKO_API_KEY=
+
 # Telegram Bot Configuration (optional)
 # TELEGRAM_BOT_TOKEN=5123456789:ABCdefGHIjklMNOpqrsTUVwxyz
 # Path to the persisted subscribers file. Each operator subscribes themselves by

.github/workflows/frontend-dev.yaml

@@ -26,7 +26,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Build Docker image
-        run: docker build -f frontend/Dockerfile -t ${{ env.DOCKER_TAGS }} .
+        run: docker build --build-arg VITE_DEPLOYMENT_ENV=dev -f frontend/Dockerfile -t ${{ env.DOCKER_TAGS }} .
 
   deploy:
     name: Deploy Frontend to DEV
@@ -54,6 +54,8 @@ jobs:
           push: true
           tags: ${{ env.DOCKER_TAGS }}
           platforms: linux/arm64
+          build-args: |
+            VITE_DEPLOYMENT_ENV=dev
 
       - name: Install cloudflared
         run: |

.github/workflows/frontend-prd.yaml

@@ -26,7 +26,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Build Docker image
-        run: docker build -f frontend/Dockerfile -t ${{ env.DOCKER_TAGS }} .
+        run: docker build --build-arg VITE_DEPLOYMENT_ENV=prd -f frontend/Dockerfile -t ${{ env.DOCKER_TAGS }} .
 
   deploy:
     name: Deploy Frontend to PRD
@@ -54,6 +54,8 @@ jobs:
           push: true
           tags: ${{ env.DOCKER_TAGS }}
           platforms: linux/arm64
+          build-args: |
+            VITE_DEPLOYMENT_ENV=prd
 
       - name: Install cloudflared
         run: |

README.md

@@ -35,6 +35,7 @@ cp .env.example .env
 # - DATABASE_URL: PostgreSQL connection string
 # - RPC_URL: Ethereum mainnet RPC endpoint
 # - BLOCKCHAIN_ID: Must be 1 (Ethereum mainnet)
+# - COINGECKO_BASE_URL: required, see "CoinGecko" section below
 
 # Generate Prisma client
 npm run prisma:generate
@@ -67,6 +68,38 @@ docker rm -f deuro-test
 
 Swagger documentation available at: `http://localhost:3001/swagger`
 
+## CoinGecko
+
+The monitoring service needs a CoinGecko-compatible endpoint for USD/EUR
+and USD/CHF FX rates (drives EUR-denominated price conversions and the
+staleness watchdog) and the daily Pro quota probe. Configuration is two
+env vars:
+
+| Var | Required | Purpose |
+|---|---|---|
+| `COINGECKO_BASE_URL` | yes | Origin the service calls. |
+| `COINGECKO_API_KEY` | no | Attached as the `x-cg-pro-api-key` header on every request when set. |
+
+The recommended deployment is the
+[**pricing-proxy**](https://github.com/DFXswiss/pricing-proxy) — a small
+caching reverse-proxy in front of CoinGecko Pro. It holds the upstream key,
+serves a 60 s shared cache, validates upstream error envelopes, and
+coalesces concurrent identical requests. When you use the proxy:
+
+```env
+COINGECKO_BASE_URL=http://pricing-proxy:8080/coingecko
+# COINGECKO_API_KEY left unset — the proxy injects its own key
+```
+
+Without the proxy you can talk to CoinGecko directly:
+
+```env
+COINGECKO_BASE_URL=https://pro-api.coingecko.com
+COINGECKO_API_KEY=CG-xxxxxxxxxxxxxxxxxxxxxxxx
+```
+
+The service refuses to start without `COINGECKO_BASE_URL`.
+
 ## Deployment
 
 - **Development**: Push to `develop` branch → auto-deploys to `dev.monitoring.deuro.com`

frontend/Dockerfile

@@ -6,6 +6,8 @@ COPY frontend/ .
 COPY shared/ /app/shared/
 ARG VITE_API_BASE_URL=/api
 ENV VITE_API_BASE_URL=$VITE_API_BASE_URL
+ARG VITE_DEPLOYMENT_ENV
+ENV VITE_DEPLOYMENT_ENV=$VITE_DEPLOYMENT_ENV
 RUN npm run build
 
 FROM nginx:alpine

frontend/src/App.tsx

@@ -6,13 +6,14 @@ import { ChallengesTable } from './components/ChallengesTable';
 import { BridgesTable } from './components/BridgesTable';
 import { MintersTable } from './components/MintersTable';
 import { HealthStatus } from './components/HealthStatus';
+import { Footer } from './components/Footer';
 
 function App() {
 	const { health, deuro, positions, collateral, challenges, minters } = useApi();
 
 	return (
-		<div className="min-h-screen bg-neutral-950 text-gray-100">
-			<div className="max-w-7xl mx-auto p-4 space-y-6 text-sm mb-8">
+		<div className="min-h-screen bg-neutral-950 text-gray-100 flex flex-col">
+			<div className="flex-1 max-w-7xl w-full mx-auto p-4 space-y-6 text-sm">
 				<HealthStatus {...health} />
 				<SystemOverview {...deuro} minters={minters} />
 				<PositionsTable data={positions} />
@@ -21,6 +22,7 @@ function App() {
 				<BridgesTable data={minters} />
 				<MintersTable data={minters} />
 			</div>
+			<Footer />
 		</div>
 	);
 }

frontend/src/components/Footer.tsx

@@ -0,0 +1,34 @@
+import { TELEGRAM_BOT_URL } from '../constants';
+
+export function Footer() {
+	return (
+		<footer className="border-t border-neutral-800 mt-8">
+			<div className="max-w-7xl mx-auto px-4 py-6 flex items-center justify-end gap-3 text-sm">
+				<a
+					href={TELEGRAM_BOT_URL}
+					target="_blank"
+					rel="noreferrer noopener"
+					title="Telegram alerts bot"
+					aria-label="Telegram alerts bot"
+					className="inline-flex items-center gap-2 text-gray-400 hover:text-gray-100 transition-colors"
+				>
+					<TelegramIcon className="w-5 h-5" />
+					<span>Get alerts</span>
+				</a>
+			</div>
+		</footer>
+	);
+}
+
+function TelegramIcon({ className = '' }: { className?: string }) {
+	return (
+		<svg
+			xmlns="http://www.w3.org/2000/svg"
+			viewBox="0 0 24 24"
+			className={`fill-current ${className}`}
+			aria-hidden="true"
+		>
+			<path d="M9.78 18.65l.28-4.23 7.68-6.92c.34-.31-.07-.46-.52-.19L7.74 13.3 3.64 12c-.88-.25-.89-.86.2-1.3l15.97-6.16c.73-.33 1.43.18 1.15 1.3l-2.72 12.81c-.19.91-.74 1.13-1.5.71L12.6 16.3l-1.99 1.93c-.23.23-.42.42-.83.42z" />
+		</svg>
+	);
+}

frontend/src/constants.ts

@@ -0,0 +1,14 @@
+export type DeploymentEnv = 'prd' | 'dev';
+
+const rawDeploymentEnv = import.meta.env.VITE_DEPLOYMENT_ENV;
+if (rawDeploymentEnv !== 'prd' && rawDeploymentEnv !== 'dev') {
+	throw new Error(`VITE_DEPLOYMENT_ENV must be "prd" or "dev" (got: "${rawDeploymentEnv}")`);
+}
+export const DEPLOYMENT_ENV: DeploymentEnv = rawDeploymentEnv;
+
+export const TELEGRAM_BOT = {
+	prd: 'https://t.me/deuro_monitor_prd_bot',
+	dev: 'https://t.me/deuro_monitor_dev_bot',
+} as const;
+
+export const TELEGRAM_BOT_URL = TELEGRAM_BOT[DEPLOYMENT_ENV];

frontend/src/vite-env.d.ts

@@ -1 +1,10 @@
 /// <reference types="vite/client" />
+
+interface ImportMetaEnv {
+	readonly VITE_API_BASE_URL?: string;
+	readonly VITE_DEPLOYMENT_ENV?: string;
+}
+
+interface ImportMeta {
+	readonly env: ImportMetaEnv;
+}

src/config/config.service.ts

@@ -88,6 +88,10 @@ export class AppConfigService {
 		return this.monitoringConfig.coingeckoApiKey || undefined;
 	}
 
+	get coingeckoBaseUrl(): string | undefined {
+		return this.monitoringConfig.coingeckoBaseUrl || undefined;
+	}
+
 	get environment(): string | undefined {
 		return this.monitoringConfig.environment;
 	}

src/config/monitoring.config.ts

@@ -67,6 +67,10 @@ export class MonitoringConfig {
 	@Min(1)
 	alertTimeframeHours?: number;
 
+	@IsOptional()
+	@IsString()
+	coingeckoBaseUrl?: string;
+
 	@IsOptional()
 	@IsString()
 	coingeckoApiKey?: string;
@@ -99,6 +103,7 @@ export default registerAs('monitoring', () => {
 	config.telegramGroupsJson = process.env.TELEGRAM_GROUPS_JSON;
 	config.telegramAlertsEnabled = (process.env.TELEGRAM_ALERTS_ENABLED || 'false').toLowerCase() === 'true';
 	config.alertTimeframeHours = parseInt(process.env.ALERT_TIMEFRAME_HOURS || '12');
+	config.coingeckoBaseUrl = process.env.COINGECKO_BASE_URL || '';
 	config.coingeckoApiKey = process.env.COINGECKO_API_KEY || '';
 	config.environment = process.env.ENVIRONMENT?.toLowerCase();
 	config.chain = process.env.CHAIN;