We occasionally encounter an error when generating the payload using this function update_price_feeds_with_funder

Price Feeds
1

On our end, we are updating the Pyth price every 30 seconds by calling the following function:

0x7e783b349d3e89cf5931af376ebeadbfab855b3fa239b7ada8f5a92fbea6b387::pyth::update_price_feeds_with_funder

However, we occasionally encounter an error when generating the payload:

Failed to generate a Pyth price payload: TypeError: fetch failed
    at node:internal/deps/undici/undici:13502:13
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async HermesClient.httpRequest (C:\kanalabs\perpetual repos\liquidation-bot\node_modules\@pythnetwork\hermes-client\lib\HermesClient.js:29:30) {
  [cause]: Error: getaddrinfo ENOTFOUND hermes-beta.pyth.network      
      at GetAddrInfoReqWrap.onlookupall [as oncomplete] (node:dns:120:26) {
    errno: -3008,
    code: 'ENOTFOUND',
    syscall: 'getaddrinfo',
    hostname: 'hermes-beta.pyth.network'
  }
}

Here is the code we are using:

export const updatePythPricePayload = async (marketId: string) => {
    try {
        const priceIds = [MARKET_PRICE_FEEDS[marketId]];
        const connection = new HermesClient(process.env.PYTH_HERMES_ENDPOINT!, {});
        const priceFeedUpdateData = await connection.getLatestPriceUpdates(priceIds, {
            encoding: "base64",
        });
        const binaryDataAsNumbers: number[][] = priceFeedUpdateData.binary.data.map((base64String: string) =>
            Array.from(Buffer.from(base64String, "base64"))
        );
        const payloadResponse = {
            function: "0x7e783b349d3e89cf5931af376ebeadbfab855b3fa239b7ada8f5a92fbea6b387::pyth::update_price_feeds_with_funder",
            functionArguments: [binaryDataAsNumbers],
            typeArguments: [],
        } as InputEntryFunctionData;
        return payloadResponse;
    } catch (error: any) {
        console.log("Failed to update Pyth price payload: ", error);
        rollbar.error("Failed to update Pyth price payload.", error);
    }
};

We’ve set PYTH_HERMES_ENDPOINT=https://hermes-beta.pyth.network and APT_PRICE_FEED_ID=0x44a93dddd8effa54ea51076c4e851b6cbbfd938e82eb90197de38fe8876bb66e.

Could anyone please help us understand and resolve this issue?

2

How often do you face this error? This happens when our service experiences a downtime and it is expected as it’s a beta service but shouldn’t happen often.

3

I think it comes three times continuously and then goes back to get the data again