Chainlink Price Viewer

WHAT IT DOES

Chainlink Price Viewer lets you read all public data from any Chainlink Aggregator V3 price feed contract. You provide the feed contract address, and the tool queries the chain to retrieve the latest price, timestamp, round ID, decimals, description, version, and round-specific data. It also checks if the feed is stale (last update > 1 hour) and displays the status clearly. This is essential for developers building DeFi applications, monitoring oracle health, verifying price feeds before integration, or debugging price discrepancies. 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 Chainlink feed contract address. Click "View price" — the tool will query the feed contract using the Aggregator V3 interface and display all available data: price, timestamp, round ID, decimals, description, version, and round details. The entire operation is read-only — no transactions are signed or sent.

TECHNICAL MECHANISM

The tool uses the standard Chainlink Aggregator V3 ABI with functions: latestAnswer(), latestTimestamp(), latestRound(), getRoundData(uint80), decimals(), description(), and version(). It reads all available data in parallel using Promise.all for efficiency. The price is normalized by dividing by 10^decimals to get the human-readable value. The timestamp is converted from Unix seconds to a local date string. Staleness is detected by comparing the feed's timestamp to the current time (1 hour threshold). The round data is fetched using the latest round ID to provide additional context (round price and update time). The tool uses ethers.js v5.7.2 to interact with the contract via the wallet's provider. All calls are view functions — no state is modified.

WHAT IT CANNOT SEE

The tool cannot verify if the feed contract is the correct one for the given asset pair — you must confirm the address against official Chainlink documentation. It cannot validate the authenticity of the price beyond what the contract reports — it trusts the contract's storage. It cannot detect if the feed has been manipulated (e.g., through flash loans or price manipulation attacks). It is limited by RPC provider availability and the specific feed implementation's logic. It cannot read prices from non-Chainlink feeds or feeds that use off-chain aggregation without on-chain verification. It cannot access historical price data beyond the latest round without additional queries.

PLEASE NOTE

This tool is for educational and analytical purposes. Always verify the feed contract address against official sources (docs.chain.link). The tool does not persist any data; all state is lost on page reload. EVM chains only.