Here is an article based on your description:
Title: Metamask: MetaMask – RPC Error: Execution Canceled, Simple NFT Mining Decentralized Application
Introduction
As a developer building a simple non-fungible token (NFT) mining application for fundraising, I encountered an unexpected issue with my deployment. In this article, I will outline the steps I took to troubleshoot and resolve the “RPC Error: Execution Canceled” error that occurred when interacting with my smart contracts on the Polygon testnet and Ethereum testnet.
The Problem
While integrating my frontend with my smart contracts, using MetaMask as the RPC client, I encountered an unexpected error. The issue was causing me to encounter an “execution canceled” error, which meant that the execution of the contract functions was canceled due to an internal inconsistency or unmet condition.
The Solution
To resolve this issue, I first reviewed my code and contracts for any bugs or inconsistencies that might be contributing to the issue. After reviewing my code, I realized that there was a small error in my contract configuration. Specifically, I implemented a simple “mining” function in one of my contracts that was supposed to create an NFT.
To resolve this issue, I modified the “mining” function in my contract to return the minted NFT instead of trying to execute it directly. This change allowed me to resolve the “RPC Error: Execution Canceled” error and successfully deploy the dapp.
Here is a high-level example of the modified code:
mining contract {
// ...
function mine() public nonReentrant {
// Mint NFT
mintNFT();
}
function mintNFT() internal return (address) {
// Return the NFT to the user
}
}
Implementation and Integration
Once the problem was solved, I deployed both contracts to the Polygon testnet and the Ethereum testnet. On the testnet, I used MetaMask as the RPC client to interact with my smart contracts.
Here is an example of how I integrated my frontend with smart contracts using MetaMask:
import { Deployer } from 'ethers';
import * as web3 from 'web3';
const deployer = new Deployer();
const network = deployer.getChainByNumber(2); // 2 represents the Ethereum testnet
// Deploy the contract to the Polygon testnet
deployer.deploy(Mining).then((address) => {
console.log(address);
});
// Deploy the contract to the Ethereum testnet
network.connect('goerli').deployer.deploy(Mining).then((address) => {
console.log(address);
});
Conclusion
In this article, I showed how to resolve an unexpected error “RPC error: execution canceled” that occurred while interacting with my smart contracts on the Polygon testnet and the Ethereum testnet. By modifying the “mining” function in one of my contracts and using MetaMask as the RPC client, we were able to successfully deploy the dapp. This experience highlights the importance of double-checking the code and contract configuration for errors that may not be immediately apparent.
I hope this article helps others building similar projects!