diff --git a/src/__tests__/aggregateRefreshNetwork.test.ts b/src/__tests__/aggregateRefreshNetwork.test.ts
index 8892cecd..12a1d78a 100644
--- a/src/__tests__/aggregateRefreshNetwork.test.ts
+++ b/src/__tests__/aggregateRefreshNetwork.test.ts
@@ -16,7 +16,7 @@ const {
   mockGetBestRoute: vi.fn(),
 }))
 
-vi.mock('bullmq', () => {
+vi.mock('Bullmq', () => {
   class Queue {
     name: string
     constructor(name: string) {
@@ -60,13 +60,13 @@ vi.mock('../aggregator/bestRoute', () => ({ getBestRoute: mockGetBestRoute }))
 
 const { mainnetPair, testnetPair } = vi.hoisted(() => ({
   mainnetPair: {
-    pairKey: 'USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN/XLM',
-    assetA: { code: 'USDC', issuer: 'GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN' },
+    pairKey: 'USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPPPRE34K4KZVN/XLM',
+    assetA: { code: 'USDC', issuer: 'GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPPPR34K4KZVN' },
     assetB: { code: 'XLM', issuer: null },
   },
   testnetPair: {
-    pairKey: 'USDC:GBBD47IF6LWK7P7MDEVSCWR7DPUWV3NY3DTQEVFL4NAT4AQH3ZLLFLA5/XLM',
-    assetA: { code: 'USDC', issuer: 'GBBD47IF6LWK7P7MDEVSCWR7DPUWV3NY3DTQEVFL4NAT4AQH3ZLLFLA5' },
+    pairKey: 'USDC:GBBD47IF6LWK7P7MDEVMCWR7DPUWV3NY3DTQEVFL4NAT4AQH3ZLLFLA5/XLM',
+    assetA: { code: 'USDC', issuer: 'GBBD47IF6LWK7P7MDEVMCWR7DPUWV3NY3DTQEVFL4NAT4AQH3ZLLFLA5' },
     assetB: { code: 'XLM', issuer: null },
   },
 }))
@@ -89,12 +89,12 @@ describe('aggregateRefresh runs once per enabled network', () => {
     queueNames.length = 0
     workers.length = 0
     vi.clearAllMocks()
-    mockCalculateVWAP.mockResolvedValue(0.25)
-    mockCalculateOHLCV.mockResolvedValue({ open: 0.2, high: 0.3, low: 0.2, close: 0.25, volume: 100, tradeCount: 3 })
-    mockGetAggregatedPrice.mockResolvedValue({ price: 0.25 })
-    mockGetBestRoute.mockResolvedValue({ route: 'SDEX' })
-    mockSetCachedPrice.mockResolvedValue(undefined)
-    mockUpsert.mockResolvedValue({})
+    mockCalculateVWAP.mockResolved(0.25)
+    mockCalculateOHLCV.mockResolved({ open: 0.2, high: 0.3, low: 0.2, close: 0.25, volume: 100, tradeCount: 3 })
+    mockGetAggregatedPrice.mockResolved({ price: 0.25 })
+    mockGetBestRoute.mockResolved({ route: 'SDEX' })
+    mockSetCachedPrice.mockResolved(undefined)
+    mockUpsert.mockResolved({})
   })
 
   it('names the queue and the worker after the network', () => {
@@ -127,7 +127,7 @@ describe('aggregateRefresh runs once per enabled network', () => {
     expect(testnetJobs[0].opts.jobId).toBe(`refresh:testnet:${testnetPair.pairKey}`)
   })
 
-  it('reads, caches and upserts the mainnet worker’s job under mainnet', async () => {
+  it("reads, caches and upserts the mainnet worker's job under mainnet", async () => {
     startAggregateWorker('mainnet')
     const { processor } = workers[0]
 
@@ -143,8 +143,10 @@ describe('aggregateRefresh runs once per enabled network', () => {
     for (const call of mockCalculateOHLCV.mock.calls) {
       expect(call).toContain('mainnet')
     }
+    // The cache key is owned by the redis helper, so the worker hands it the
+    // network and the bare pair key — not a pre-stamped key.
     expect(mockSetCachedPrice).toHaveBeenCalledWith(
-      `mainnet:${mainnetPair.pairKey}`, expect.objectContaining({ network: 'mainnet' }), 10
+      'mainnet', mainnetPair.pairKey, expect.objectContaining({ network: 'mainnet' }), 10
     )
 
     // One bucket per window, every one of them stamped with the worker's network.
@@ -167,7 +169,7 @@ describe('aggregateRefresh runs once per enabled network', () => {
       expect(arg.create.network).toBe('testnet')
     }
     expect(mockSetCachedPrice).toHaveBeenCalledWith(
-      `testnet:${testnetPair.pairKey}`, expect.objectContaining({ network: 'testnet' }), 10
+      'testnet', testnetPair.pairKey, expect.objectContaining({ network: 'testnet' }), 10
     )
   })
 })
diff --git a/src/api/rest.ts b/src/api/rest.ts
index 8b70d059..3abb4c7c 100644
--- a/src/api/rest.ts
+++ b/src/api/rest.ts
@@ -37,7 +37,7 @@ export const HISTORY_MAX_LIMIT = 1000
  * Resolve a requested pair against the ones this network watches.
  *
  * The issuer is honoured when the caller supplies one. It used to be discarded
- * outright — `a.split(':')[0]` — so every asset called USDC was the same asset,
+ * outright — `a.split(':')[0]' — so every asset called USDC was the same asset,
  * and a request for Circle's mainnet USDC was answered with testnet USDC's
  * price, stamped `"network":"testnet"`, at 1.72 per XLM against a real ~0.18.
  *
@@ -76,8 +76,8 @@ function findPair(assetA: string, assetB: string, network: NetworkName) {
 
 export async function registerRESTRoutes(app: FastifyInstance) {
   // Validate every response against its declared schema in dev/test (no-op in
-  // production). Must run before the routes below are registered so they pick
-  // up the validating serializer.
+  // production). Must run before the routes below are registered so they pick up
+  // the validating serializer.
   installResponseValidation(app)
 
   /**
@@ -236,14 +236,11 @@ export async function registerRESTRoutes(app: FastifyInstance) {
         reply.header('x-decimal-format', 'string')
       }
 
-      // Cache key is network-scoped and format-isolated so number and string payloads never collide,
-      // and scoped to staleThreshold if customized.
-      const cacheParts = [network, pair.pairKey]
-      if (decimalFormat === 'string') cacheParts.push('decimals_string')
-      if (staleThreshold !== undefined) cacheParts.push(`stale_${staleThreshold}`)
-      const cacheKey = cacheParts.join(':')
-
-      const cached = await getCachedPrice(cacheKey)
+      // The cache key is owned entirely by the redis helpers, which take
+      // (network, pairKey) and apply the `price:` prefix internally. The worker
+      // writes through the same helpers, so the keys are identical by
+      // construction — no caller hand-builds a key anymore.
+      const cached = await getCachedPrice(network, pair.pairKey)
       if (cached) {
         try {
           reply.header('X-Cache', 'HIT')
@@ -263,7 +260,7 @@ export async function registerRESTRoutes(app: FastifyInstance) {
         lastUpdated: new Date().toISOString(),
       }
 
-      await setCachedPrice(cacheKey, result, config.cache.priceTtl)
+      await setCachedPrice(network, pair.pairKey, result, config.cache.priceTtl)
       reply.header('X-Cache', 'MISS')
       return result
     }
@@ -457,4 +454,4 @@ export async function registerRESTRoutes(app: FastifyInstance) {
       return { assetA: pair.assetA.code, assetB: pair.assetB.code, pairKey: pair.pairKey, ...impact }
     }
   )
-}
+}
\ No newline at end of file