Application brakes on feed withount prices

[wondermach]

Hi,

the application does not handle this error: if you request a feed for a pair that does not have prices yet, the application brakes.

_[Nest] 1 - 12/05/2025, 12:17:18 PM WARN [CcxtFeed] No prices found for {"category":1,"name":"xxx/USD"}
[Nest] 1 - 12/05/2025, 12:17:18 PM LOG [ExampleProviderController] Current feed values: [{"feed":{"category":1,"name":"xxx/USD"}}]
/app/dist/data-feeds/ccxt-provider-service.js:290
const market = exchange.markets[source.symbol];
^

TypeError: Cannot read properties of undefined (reading 'xxx/USDT')
at CcxtFeed.fetchLastPrices (/app/dist/data-feeds/ccxt-provider-service.js:290:44)
at CcxtFeed.getFeedPrice (/app/dist/data-feeds/ccxt-provider-service.js:272:23)
at CcxtFeed.getValue (/app/dist/data-feeds/ccxt-provider-service.js:82:34)
at /app/dist/data-feeds/ccxt-provider-service.js:78:49
at Array.map ()
at CcxtFeed.getValues (/app/dist/data-feeds/ccxt-provider-service.js:78:32)
at ExampleProviderService.getValues (/app/dist/app.service.js:24:30)
at ExampleProviderController.getCurrentFeedValues (/app/dist/app.controller.js:36:51)
at /app/node_modules/@nestjs/core/router/router-execution-context.js:38:29
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)_

Example configuration:

{
"feed": {
"category": 1,
"name": "xxx/USD"
},
"sources": [
{
"exchange": "gate",
"symbol": "xxx/USDT"
},
{
"exchange": "coinbase",
"symbol": "xxx/USD"
}
]
}

Example request:

curl -X 'POST'
'http://localhost:3101/feed-values/'
-H 'accept: application/json'
-H 'Content-Type: application/json'
-d '{
"feeds": [
{"category":1,"name":"xxx/USD"}

]
}'