Cross-Chain Price Feed Sync Tool

WHAT IT DOES

This tool provides cross-chain price feed synchronization, enabling you to read price data from a source oracle feed, verify consistency against a target feed, and update the target feed with the latest price. It reads your connected wallet address, source price feed contract address, target price feed contract address, price data (latest price, timestamp, roundId), current block timestamp, sync status, and price update history. You can then sign and send transactions to read prices from the source feed, verify consistency between source and target feeds, update the target price feed with the latest source price, and record sync metadata on-chain. All price parameters are displayed in a clear review panel before you sign, so you know exactly what you are syncing. The tool also logs transaction hashes, confirmation status, and gas costs, providing a complete audit trail of all sync activities.

HOW TO USE

Connect your wallet using the built-in wallet bridge, choose the network that matches your target chain, and paste the source price feed contract address and target price feed contract address. Enter the number of decimals used by the price feed for display purposes. The review panel shows all inputs and the current block timestamp before you sign. Use the numbered action buttons: read source price to fetch the latest price, timestamp, and round ID from the source feed; verify consistency to compare source and target prices and identify mismatches; or sync to target to update the target price feed with the latest source price and current timestamp. You can also check sync status to view the current price on the target feed. Each transaction is signed sequentially, and the tool displays transaction details and confirmation status.

THE REAL MECHANISM

This tool uses ethers.js v5.7.2 to build and send transactions through the wallet's signer. It does not rely on any hardcoded contract addresses – you paste the contracts you are using, so you are in full control. When you read a price, the tool calls the latestAnswer, latestTimestamp, and latestRound functions on the source feed contract, fetching the current price data. When you verify consistency, the tool compares the source and target prices using the same functions on both contracts. When you sync to the target, the tool calls the updatePrice function on the target feed contract, passing the source price and the current block timestamp. The tool reads the target feed's current state via the same view functions to confirm the update. All transactions are sequential to prevent nonce conflicts, and gas costs are calculated using effectiveGasPrice for accurate post-EIP-1559 reporting.

WHAT IT CANNOT SEE

This tool cannot verify off-chain price accuracy, detect price manipulation, ensure price feed oracle reliability, or verify that the target price feed contract supports updates correctly. It cannot detect if the source price feed is compromised or if the price data has been manipulated off-chain. The tool also cannot verify that the target price feed contract correctly handles price updates or that the price is used correctly by downstream applications. It cannot simulate the outcome of a transaction before you sign it, nor can it guarantee that the sync will be processed correctly if the contract is not properly implemented.

PLEASE NOTE

This tool works only on EVM-compatible chains supported by your wallet and provider. Always double-check the contract addresses and parameters before signing. Use testnet first. The tool is a transaction-signing interface and price feed management tool, not a price accuracy or oracle reliability verification system.