PolkaVM Storage Contract DApps

This repository contains basic dApp examples for interacting with a simple Storage smart contract deployed on Westend Asset Hub. These examples demonstrate how to connect wallets, read contract state, and write to the contract using different popular JavaScript libraries.

About the Storage Contract

The examples interact with a minimal Storage smart contract that allows storing and retrieving a number value:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

contract Storage {
    // State variable to store our number
    uint256 private number;

    // Event to notify when the number changes
    event NumberChanged(uint256 newNumber);

    // Function to store a new number
    function store(uint256 newNumber) public {
        number = newNumber;
        emit NumberChanged(newNumber);
    }

    // Function to retrieve the stored number
    function view returns (uint256) {
        return number;
    }
}

Available Examples

The repository contains the following implementations:

1. ethers-dapp - dApp implementation using ethers.js
2. viem-dapp - dApp implementation using viem

Each example demonstrates:

• Connecting a wallet
• Reading the current stored number
• Updating the stored number

Getting Started

Each example has its own README with specific setup instructions. To get started with either example:

1. Clone this repository
2. Navigate to either the ethers-dapp or viem-dapp directory
3. Follow the instructions in the respective README.md file

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.