Frequent Batch Auction Order Canceller

WHAT IT DOES

Frequent Batch Auction Order Canceller is a non-custodial tool that cancels unfilled orders in frequent batch auctions before settlement, enabling users to withdraw unfilled bids or offers and release locked collateral. It reads frequent batch auction contract state, user address, token balances, order parameters, order ID, order type, order amount, order price, auction batch ID, order status, cancellation eligibility, cancellation window, order expiry, user's order history, settlement state, and collateral return state to structure the optimal cancellation operation. With a single transaction, it calls cancelOrder(), executeOrderCancellation(), or submitOrderCancel() on the target contract, removing the specified order from the auction batch. The tool is essential for managing orders in frequent batch auctions before settlement occurs.

HOW TO USE

1. Connect your wallet (EVM-compatible).

2. Paste the frequent batch auction contract address.

3. Enter the order ID and auction batch ID.

4. Optionally specify a collateral token address (leave empty for native currency).

5. Review the order status, type, amount, and cancellation eligibility.

6. Click "cancel order" and confirm the transaction in your wallet.

The tool checks order status and cancellation eligibility before execution to prevent failed transactions. After the transaction confirms, your order is cancelled on-chain—no centralized custody, no intermediaries. The collateral locked for the order is released back to your wallet.

TECHNICAL MECHANISM: MULTI-FUNCTION FALLBACK WITH ELIGIBILITY VERIFICATION

Unlike simple transaction builders that assume a single function signature, this tool implements a multi-function fallback strategy. It first attempts cancelOrder(), then falls back to executeOrderCancellation() or submitOrderCancel() if the primary method fails—automatically adapting to different contract implementations without requiring the user to know the exact function name. For all on-chain reads, it uses chunked block range scanning that halves on failure, preventing the common "eth_getLogs limit exceeded" error that halts most scanners on public RPCs. It double-verifies cancellation eligibility by checking both the current order status and cancellation window from storage, rather than relying on historical events—because an event log proves an order was placed, not that it can currently be cancelled. Gas estimation uses receipt.effectiveGasPrice for accurate post-EIP-1559 cost accounting, and all batched operations are sequential with concurrency caps to avoid nonce conflicts. The tool also validates that the order ID and batch ID exist and that the user has permission to cancel the order before execution.

WHAT IT CANNOT SEE

This tool cannot verify that the frequent batch auction contract is legitimate or has not been compromised. It cannot detect if the auction has been manipulated. It cannot ensure that cancellation will execute at the optimal gas price due to network conditions. It cannot guarantee that cancellation will succeed if the contract is paused or frozen. It cannot verify that the contract has not been upgraded or modified. It cannot detect if the trade path is optimal or not front-run. It cannot recover funds if execution fails due to contract bugs or insufficient approval. It cannot verify that the order ID is valid or not. It cannot predict market movements, price gaps, or flash crashes. It cannot guarantee execution during extreme network congestion or volatile market conditions. It cannot detect if the underlying asset has been compromised. It cannot prevent the user from canceling or modifying cancellation parameters. It cannot ensure that the order will be cancelled before settlement. It cannot protect against loss if cancellation is rejected. It cannot verify that the cancellation window is open. It cannot guarantee that the order will be removed from the batch. It cannot ensure that collateral will be returned correctly. It cannot verify that the order has not already been matched.

PLEASE NOTE

This tool operates only on EVM-compatible chains (Ethereum Mainnet, Polygon, Arbitrum, Optimism, etc.). It is non-custodial—you retain full control of your funds at all times. Always verify contract addresses, order IDs, batch IDs, and cancellation parameters before executing. Orders can only be cancelled before settlement—once settlement occurs, cancellation is no longer possible. The tool is provided as-is; use at your own risk.