From 3e07af1eaa7a5bf0161c48b9fbc2b5a38c4f80d2 Mon Sep 17 00:00:00 2001
From: TaprootFreak <142087526+TaprootFreak@users.noreply.github.com>
Date: Thu, 14 May 2026 18:33:00 +0200
Subject: [PATCH 1/2] Honor euro-price TTL inside updatePrices (#110)

updatePrices() fetched the tether/eur reference on every block tick,
bypassing the existing 60s in-memory cache that getEuroPrice() and
getDepsPrice() already respected. With block intervals of 6-12s this
generated ~5-10x more upstream calls than the cache was designed to
allow, exhausting the monthly CoinGecko quota.

Route the call through refreshEuroPriceIfStale() so the same TTL
applies to all entry points.
---
 prices/prices.service.ts | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/prices/prices.service.ts b/prices/prices.service.ts
index c2e2a61..b53ea6f 100644
--- a/prices/prices.service.ts
+++ b/prices/prices.service.ts
@@ -221,11 +221,7 @@ export class PricesService {
 	async updatePrices() {
 		this.logger.debug('Updating Prices');
 
-		const euroPrice = await this.fetchEuroPrice();
-		if (euroPrice) {
-			this.euroPrice = euroPrice;
-			this.euroPriceTimestamp = Date.now();
-		}
+		await this.refreshEuroPriceIfStale();
 
 		const deps = this.getDeps();
 		const m = this.getMint();

From 9b0a98c087ed1a8d7cf0ff241798e021fd26544f Mon Sep 17 00:00:00 2001
From: TaprootFreak <142087526+TaprootFreak@users.noreply.github.com>
Date: Thu, 14 May 2026 19:06:09 +0200
Subject: [PATCH 2/2] Stop refetching tokens without a price source on every
 block (#112)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When fetchPrice() returns null/undefined (e.g. CoinGecko returns {}
for an unlisted collateral token), updatePrices() left the cache
entry untouched and the 5-minute staleness check (timestamp +
300_000 < now) was still true on the next block tick. Combined
with the 6-12s block polling that drives updatePrices(), this
made the same handful of unlisted tokens generate ~50 upstream
calls per hour per API instance — the dominant CoinGecko quota
consumer after #110.

Bump the entry's timestamp on a failed fetch too, so the retry
honours the same 5-minute window as a successful fetch.
---
 prices/prices.service.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/prices/prices.service.ts b/prices/prices.service.ts
index b53ea6f..9c829f5 100644
--- a/prices/prices.service.ts
+++ b/prices/prices.service.ts
@@ -259,6 +259,9 @@ export class PricesService {
 
 				if (!price) {
 					pricesQueryUpdateCountFailed += 1;
+					// bump timestamp on failure so we honour the 5-minute retry window
+					// instead of refetching on every block tick when a token has no price source
+					pricesQuery[addr] = { ...oldEntry, timestamp: Date.now() };
 				} else {
 					pricesQuery[addr] = {
 						...erc,