I can provide you with an article based on the given specification. Please note that I will assume that the createSubscription(), getSubId() functions are already implemented and available in the JavaScript code.
Ethereum: Creating and Setting SubIDs Using VRF Coordinators
In this article, we will explore how to create and set subids using VRF (Verifiable Random Function) coordinators in a hardhat environment.
Overview of Hardhat Environment
Hardhat is a popular Ethereum development framework that allows us to build and deploy smart contracts on the Ethereum network. It provides an easy-to-use interface for interacting with the Ethereum blockchain, making it ideal for rapid prototyping and development.
Creating and Setting Subids Using VRF Coordinators
To create subids using VRF coordinators in the helmet, you need to:
- Import the required dependencies
- Configure our network configuration
- Create a
VRFCoordinatorinstance
- Call the
createSubscription()function and pass it as an argument to thesetSubIdmethod
- Get the subid using the
getSubIdmethod
Deployment script for the helmet (deploy.js)
const { network, ethers } = require("@nomiclab/hardhat");
// Configure our network configuration
const networks = {
helmet: {
chain ID: 1337,
// Add other network configurations as needed
},
};
// Import the VRF Coordinator library
const vrfCoordinatorV2_5Mock = require("./vrfCoordinatorV2_5Mock");
asynchronous function main() {
const { getChainId } = await ethers.getContractFactory("your-contract-name");
const contractInstance = await getChainId();
// Create a subscription instance with the VRF coordinator
const subscriptionInstance = await vrfCoordinatorV2_5Mock.createSubscription({
chainId: contractInstance.chainId,
provider: network.provider,
});
// Set the subid using the createSubscription() function.
await subscriptionInstance.setSubId("subid");
console.log(await vrfCoordinatorV2_5Mock.getSubId());
// Get the subid using the getSubId method
const subid = await vrfCoordinatorV2_5Mock.getSubId();
console.log(subid);
}
main();
In this script, we first import the necessary dependencies and configure the network configuration. Then we create a VRFCoordinator' instance with the VRF Coordinator version 2.5 Mock.
Next, we create a subscription instance using thecreateSubscription()function and pass it as an argument to thesetSubIdmethod. This sets the subsidy for the specified contract.
We then register the subid using thegetSubIdmethod and get the subid by calling thegetSubIdfunction directly on the VRF Coordinator instance.
Note:
Replace“your-contract-name”with the actual name of your Ethereum contract and replace“your-sub-id”` with the desired subid value. This script assumes that you have a simulated deployment of VRF Coordinator version 2.5 available.