Unusual Gas Payment Alert

WHAT IT DOES

Unusual Gas Payment Alert is your transaction cost awareness tool that flags unusual gas payments before you confirm. It automatically intercepts pending transaction gas prices and gas limits from confirmation pages, calculates gas cost in ETH, and compares the gas price against historical averages and current market norms. The tool displays an alert when gas payment deviates significantly from expected values, provides a gas cost comparison showing current vs typical gas prices, flags unusually high or low gas payments, supports configurable deviation thresholds, shows gas price trend indicators, and provides one-click verification of gas price via block explorers.

WHERE IT RUNS

This script runs on all major DEX interfaces including Uniswap (app.uniswap.org), SushiSwap (app.sushi.com), Curve (curve.fi), Balancer (balancer.fi), 1inch (1inch.io), CowSwap (cow.fi), major NFT marketplaces including OpenSea (opensea.io), Blur (blur.io), LooksRare (looksrare.org), Zora (zora.co), Rarible (rarible.com), Foundation (foundation.app), and Etherscan (etherscan.io). It works on transaction confirmation pages, wallet approval dialogs, and any page displaying pending gas details.

HOW TO USE

Install the script through the BotGentz userscript manager. Click "Connect Wallet" to link your EVM wallet extension. Navigate to any supported page and initiate a transaction. When the confirmation dialog appears, the tool automatically detects the gas price and gas limit from the page. The panel displays the gas details, historical average, deviation percentage, and a visual comparison bar. If the gas price deviates beyond your configured threshold (default 30%), the tool shows an alert—yellow for Elevated, red for Extreme—and sends a browser notification. Review the gas comparison before confirming. Adjust the deviation threshold in settings to match your sensitivity.

HISTORICAL GAS PRICE COMPARISON ENGINE WITH DEVIATION DETECTION

Unlike simple gas fee viewers that only show the current price, this tool implements a historical comparison engine that tracks gas prices over time and detects anomalies. The engine collects gas price samples from every page visit, building a historical average that serves as the baseline for comparison. When a pending transaction is detected, the tool extracts the gas price from the page or queries the wallet via eth_gasPrice, then calculates the deviation from the historical average using the formula: ((currentGas - historicalAvg) / historicalAvg) × 100. The deviation is compared against user-configurable thresholds (default 30%) to classify gas payments as Normal, Elevated, or Extreme. The tool also distinguishes between unusually high and unusually low gas payments, helping users identify both expensive transactions and potentially suspicious low-gas transactions. Visual comparison bars and color-coded status indicators provide immediate visual context for the gas price relative to historical norms.

THE PANEL

The floating panel is fully draggable and snap-to-edge enabled. You can collapse it to a compact bubble when not in use, resize it to your preferred dimensions, and it remembers its position across page loads using persistent storage. Press Escape to quickly dismiss the panel. The panel displays the gas price, gas limit, gas cost, historical average, deviation percentage, visual comparison bar, status indicator (Normal/Elevated/Extreme), and recent gas price history.

PLEASE NOTE

This script requires the free BotGentz extension to be installed in your browser—it does not run as a standalone extension. You also need a real EVM wallet extension already installed and configured for transaction interception. The tool cannot intercept transactions signed within the wallet extension without page visibility and relies on the page exposing gas data in a detectable format. Historical gas price data is limited to observed values during the browsing session. No user data is collected or transmitted—all gas history stays local in your browser storage. The tool provides gas price awareness assistance but does not guarantee detection of all unusual gas payments or predict future gas prices.