Layer 2 Bridge Deposit Helper

WHAT IT DOES

Layer 2 Bridge Deposit Helper watches the current L2 bridge page for the user's connected wallet address, reads the user's current ETH and token balances on L1 from the blockchain, estimates gas costs for the bridge transaction based on current network conditions, calculates the optimal deposit amount to minimize gas-to-value ratio, and displays the recommended deposit amount with estimated final L2 balance, gas cost, and expected arrival time. The tool connects to the user's wallet via window.ethereum, reads the user's ETH balance using provider.getBalance(), fetches current gas prices via eth_gasPrice, estimates the bridge fee based on the destination chain (Arbitrum or Optimism), calculates the optimal deposit amount that maximizes value while minimizing the gas-to-value ratio, and projects the final L2 balance after fees. It then displays a comprehensive analysis including the recommended deposit amount, gas cost, bridge fee, L2 arrival time, and efficiency assessment.

WHERE IT RUNS

The tool runs as a panel inside your browser on L2 bridge pages at https://bridge.arbitrum.io/* and https://app.optimism.io/bridge/*. It works on the Arbitrum and Optimism bridge interfaces where users deposit funds from L1 to L2. The tool connects to your real EVM wallet extension (MetaMask, WalletConnect, or any wallet injecting window.ethereum) to read on-chain data via eth_call and the ethers library loaded at runtime. No data is sent to any external server; all reads happen directly from the blockchain through your wallet provider.

HOW TO USE

Install the BotGentz extension, navigate to the Arbitrum or Optimism bridge page, and open the Layer 2 Bridge Deposit Helper panel. Set your maximum acceptable gas price in Gwei (default 50) — the tool will warn you if current gas prices exceed this limit. Set your minimum bridge amount in USD (default $100) — the tool will alert you if the optimal deposit falls below this threshold. Select the token you wish to bridge from the dropdown — ETH, USDC, USDT, DAI, or WBTC. Toggle "Auto-calculate on page load" if you want the tool to analyze automatically when you open the panel. Click "Calculate" — the tool detects your wallet address, reads your ETH balance, fetches current gas prices, estimates the bridge fee and gas cost, calculates the recommended deposit amount, and displays a complete analysis including gas cost, bridge fee, recommended deposit, and expected arrival time. Review the output and use the recommended parameters for manual execution through the bridge interface.

MECHANISM — ON-CHAIN BALANCE AND GAS PRICE ANALYSIS WITH OPTIMAL DEPOSIT CALCULATION

This tool uses an on-chain balance and gas price analysis engine that calculates optimal deposit amounts for L2 bridges. The system first connects to window.ethereum and requests the user's wallet address via eth_requestAccounts. It creates a Web3Provider using ethers and reads the user's ETH balance via provider.getBalance(address). It fetches the current gas price via provider.getGasPrice() and converts it to Gwei for comparison against the user's configured limit. The bridge fee is determined based on the destination chain: Arbitrum (~0.02%) or Optimism (~0.01%). The gas cost is estimated using a standard bridge transaction complexity of 200,000 gas units, multiplied by the current gas price. The optimal deposit amount is calculated as 80% of the maximum possible deposit (balance minus gas cost and bridge fee) to account for price fluctuations and ensure a buffer. The tool also calculates the efficiency ratio (deposit value divided by gas cost) and recommends a deposit if the gas price is within limits and the deposit meets the minimum threshold.

THE PANEL

The BotGentz panel is fully draggable, allowing you to position it anywhere on your screen without obstructing the bridge interface. It includes per-site position memory, so the panel returns to your preferred location each time you visit the bridge page. Snap-to-edge functionality lets you dock the panel to any side of the browser window. The panel collapses to a compact icon when not in use and expands with a single click. You can resize it to your preferred dimensions, and pressing the Escape key instantly closes the panel. All interactions are smooth and intuitive, designed to work alongside your bridging workflow.

PLEASE NOTE

This tool requires the free BotGentz extension and a real EVM wallet extension (such as MetaMask) already installed in your browser. EVM chains only — currently supports Ethereum mainnet bridging to Arbitrum and Optimism. This is an analysis and planning tool only — it does not execute bridge deposit transactions automatically. The tool cannot guarantee that the gas price remains stable at execution time due to network fluctuations. It cannot account for L1-L2 price differences or slippage during the deposit process. It cannot read balance data from wallets not connected via window.ethereum. It cannot predict future gas price movements or optimal deposit timing. It cannot verify the bridge contract's state or any pending deposits from other users that may affect completion time. All blockchain reads are performed directly through your wallet provider; no data is stored or transmitted beyond your browser. Websites change their layouts and content structures regularly; while we continuously update the extraction logic, some pages may require script updates. Always verify all deposit details and bridge contract state independently before executing any transactions.