Ethereum: How to get the hash of the Fulfill Random Words transaction (callback) that gets mined after calling the Chainlink’s VRF?

by

I provide you with a step of the hash step up to them FulfillrandomWords transaction (feedback) in Ethereum.

What is Chainlink VRF?

Vhinlink VRF means the performance of any feature, which is the Dementery Random Cumber Generator of unused to generate many random numbers. This is an essential part of Ethereum blockchain as it allows developers to occupy random numbers secure and reliable.

How does Vhinlink VRF work?

When you call a feature of Vinlink VRF, such as Chainlink-VRF random words, the node (eg program of node.js or compain interface) generates an arbitrary number and returns it. This number is the node using a digital signature.

How to note the FulfillrandomWords transaction?

To remove the hash from the FulfillrandomWords transaction, you must:

  • CONTEMBER OF YOUR CONGRIGATION OF THE VRF CONGRABLE: Make sure your Node.js or command inter-i command correct settings for Vinlink VRF, includingKeyidScret 'practices.

  • Call the Fulfillrandomwords feature : When the transaction callschainlink-Vrf randows, it generates a random number using the VRF of Chainlink. The resulting hash will be returned as an answer.

  • Check the answer : The Node.js program or the command interface should check these VRF chain response exchange and matches the expected format.

Example Node.js Code

*

javacript

Const Chainlink = Requirement ('@chainlink/api');

// Set your Keyid and Secret

const Keyid = 'your_key_id';

Const Secret = 'Your_Secret';

// Call feature Fulfillrandomwords

Asynchronized feature Getfulfillrandomwordshash () {

CONST response = keat chainlink.vrf.randomwords ({Keyid, SECTLE});

Console.log (response);

// Check the answer to make sure it matches the expected format

if (response.data.length! == 16) {

throwing a new error ("invalid length of responsibility");

}

// Return the Fulfillrandomwords transaction (back call)

Return Response.hash;

}

// Call the feature and print them

GetFulfillrandomwordshash (). Then ((hash) => console.log (hash));

re

ADDITIONAL TIP

  • Make sure you replicateYouur_Key_idand 'youur_seCrte with your actual key ID of the VRF chain and a secret.

  • The Extension hash can vary depending on your interface program on your node.js or command line interface. The documentation of you that you can document is so.

  • Keep in mind that the FulfillrandomWords (Callback) transaction is a Randing Number generator, so its outcome will carry a camp called.

Following these steps and using the VRF of the VRF chain correctly, you will have a hash from them the FulfillrandomWords transaction.

Tags: No tags

Leave A Comment

Your email address will not be published. Required fields are marked *