Streams API latency

Technical Issue Reporting
#1

Using Streams API and webhook.
Everything is working smoothly except timing.

For example -
webhook is called at
127.0.0.1 - - [10/Nov/2023 13:46:27] “POST /webhook HTTP/1.1” 200

but if we will have a look at the same transaction at Etherscan -
Transaction Hash:
0x9203bc230bad00fbb0ba802dc6d455680febcac267ddb986dde97ae7989b9a79
Status:
Success
Block:
10018581
19 Block Confirmations
Timestamp:
5 mins ago (Nov-10-2023 10:43:36 AM +UTC)

Etherscan is 3 min ahead of Streams

And I doubt it is network latency issue, because websocket app sample monitoring same address produce result immediately at the same host where webhook web server is running.

#2

Hi @antonv

For each transaction trigger you will receive 2 webhooks. One webhook will be sent soon after the transaction is registered on blockchain. 2nd webhook is sent after a certain block confirmations. So the 2nd webhook is always received with a delay. Please have a look at the below docs for more details

Let me know if you have any questions

#3

Thank you for the answer. I’m relatively new in apps developments Moralis API .

Definitely my webhook is receiving two POSTs - first one with ‘confirmed’: False
at 10:43:40 and second one at 10:46:27 with ‘confirmed’: True.
I decided that first message was with transaction in Pending state and second one with Confirmed ( Mined) state.
But from the document above :
The first webhook will come as soon as the block is mined and have confirmed:false
So fist one is mined.
Got it.

1 Like
#4

BTW - do you have any ideas how to get decoded events from transaction in webhook?
I mean ‘swap’ event from ‘execute’ transaction function for example

#5

You can decode using the below function. Pass the entire webhook data to the below function. It will decode all the logs from the webhook.

const decodedLogs = Moralis.Streams.parsedLogs(webhookData);