Solana: why do i receive historical data when add listener for streamflow using onprogramaccountchange

SEAINING THE CURRENT OF THE CURRENT OF THE CURRENCY OF THE CURRENT OF THE CURRENTS

Once you have set up the listener to follow the changes in the Sorana -Blockchain flow, you will often receive historical information as part of a decoded event. In this article, we will break down what every field of the ‘decodedata’ object represents and provide views on why you may receive historical information.

magical number (magic)

The first decoding field is the magic number, which is an unique identifier of Sorana -Blockchain. It is represented by ‘ . In Solana, this value corresponds to the standard0x …project code. This magic number acts as an identity mark and helps to ensure that only authorized parties can create new accounts.

version (version)

The next field is the Sorana -Blockchain version. It is represented by '. In this context, it is likely to refer to the current Sorana version or a specific release. This information is crucial to maintain compatibility with the latest Blockchain versions and to ensure smooth integration.

created

The “Created” field includes a timestamp when the event was sent. It is represented by a number of timestamps in seconds after the era. In your decoded information, this value seems to be 0x ..., which suggests that it is a Unix-style timestamp. This allows you to follow when certain events took place in the block chain.

Other fields (unpacked)

Decoded information is an object with multiple fields:

  • Power Power ': Includes flow -related data

  • Events’: A set of event objects where each event has the following features:

+ Type: Represents the type of event (eg” on proprogramaccountchange “)

+ Name: to determine the name of the event

+ Args: a list of the arguments of the event

While these fields provide valuable information about the events you follow, they may not be immediately relevant to a particular use case. The historical information of the “flow” listener typically contains time stamps, event types and sometimes extra metadata.

Why receive historical information?

Solana: why do i receive historical data when add listener for streamflow using onprogramaccountchange

Historical information is likely to be produced by a Solan-based service or application that creates and emits flow events at regular intervals. By listening to these events using the Programccountchange listener, you can capture and analyze the data in real time.

Some of the possible reasons for receiving historical information from the on ProgramccountChange listener are:

  • Monitoring the network performance or delay

  • Analysis of transaction patterns or flow data

  • Monitoring of certain types of events or frequencies

To better understand what events are radiating and when, I recommend checking your on Programccountchechine listener and the decoded information you receive. In addition, you can examine further documentation for the Sorana-based services to get a deeper understanding of their use and requirements.

Example with a piece of code

Here’s an example of a piece of code that shows how to create a listener who is decoded by historical flow information from On Programccountching:

`Javascript

Bring {Eventlistener} ‘@soan/web3.js’;

Bring {streamfloweventdecodeddata} from ‘./streamflow-event-decoded-data’;

const listener = (context) => {

Const decodeddata = decodeevent (context.event);

if (decodeddata.streamflow && decodeddata.events.length> 0) {

Console.log (Power Current Event Type: $ {decoddata.events [0] .type});

Console.log (Power Title Name: $ {decoddata.events [0] .name});

// analyzes events and print their time stamp

Decodeddata.events.foreach ((event) => {

Const Timestamp = Event.Createdat;

Console.log (Event -time stamp: $ {timestamp});

});

}

};

Listener.listen (‘current current’, (context, decodddata) => {

if (decodeddata.streamflow) {

Console.log (decodeddata.

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