Blockchain Notifier

WHAT IT DOES Blockchain Notifier lets you monitor on-chain conditions and receive alerts when they are met. You provide the contract address, a condition to watch (e.g., "balance > 100"), the ABI function to read (e.g., "balanceOf(address)"), and a polling interval. The tool repeatedly queries the chain and triggers an alert when the condition becomes true. It displays current values, status, and a history of recent alerts. This is essential for developers and traders who need to monitor contract states, token balances, or any on-chain data without writing custom scripts. It reads the current network chain ID from your wallet provider to ensure queries are directed to the correct chain. HOW TO USE Connect your wallet using the "Connect" button (required for RPC access). Select the target network (Ethereum Mainnet, Sepolia, Polygon, BSC, Arbitrum, Optimism, and testnets are supported). Enter the contract address, condition (e.g., "balance > 100"), ABI function (e.g., "balanceOf(address)"), function parameter (if needed), and polling interval in seconds. Click "Start monitoring" — the tool will poll the chain at the specified interval and display alerts when the condition is met. Click "Stop monitoring" to stop. The entire operation is read-only — no transactions are signed or sent. TECHNICAL MECHANISM The tool uses ethers.js to create a contract instance with the provided ABI function. It calls the function at the specified interval using setInterval. The returned value is parsed as a number and compared against the condition threshold using the specified operator (>, =,