Gas Limit Risk Explainer

WHAT IT DOES

Gas Limit Risk Explainer is a read-only tool that analyzes transaction gas limits, generating AI-powered plain-language explanations of gas-related risks and recommendations. It reads transaction gas limit, estimated gas usage, gas used in similar transactions, block gas limit, gas price, gas consumption patterns, opcode gas costs, contract bytecode, call depth, execution context, reentrancy patterns, event logs, transaction history, and failure history due to gas. The tool then presents this data alongside an AI-generated analysis of the risk of a transaction running out of gas, recommending appropriate gas limits based on historical usage and contract complexity, and warning about potential gas-related failures — helping you set optimal gas limits before signing a transaction.

HOW TO USE

Connect your wallet using the BGWallet bridge and select your target network. Enter the transaction hash you want to analyze. Optionally enter the target contract address for focused analysis. Click "Analyze gas limit risk" to read on-chain transaction gas data. The tool displays the transaction hash, gas limit, estimated gas usage, buffer percentage, and gas limit risk level (Low/Medium/High). Detailed information includes block gas limit, historical average gas usage, gas consumption pattern, call depth, reentrancy patterns, failure history due to gas, opcode gas costs, and execution context. A recommended gas limit box provides specific guidance. An AI explanation appears below the on-chain data, analyzing the risk of the transaction running out of gas, recommending an appropriate gas limit based on historical usage, contract complexity, and current network conditions, and warning about potential gas-related failures and mitigation strategies before you sign the transaction. The wallet's own signature step still protects you — this explanation is informational only and does not replace reviewing what you approve in your wallet.

TECHNICAL MECHANISM

The tool uses ethers.js v5.7.2 with the provider from the BGWallet bridge to read on-chain transaction gas data. No hardcoded contract addresses are used — you are always in control of which contract you trust. When analyzing gas limit risks, the tool reads the transaction gas limit from the transaction object, estimates gas usage via provider.estimateGas(), reads gas used in similar transactions by scanning transaction history, reads the block gas limit via provider.getBlock(), reads the gas price from the transaction, analyzes gas consumption patterns by simulating the transaction and profiling gas usage, reads opcode gas costs by inspecting the contract bytecode and simulating execution, reads contract bytecode via provider.getCode(target), reads call depth from the execution trace, reads execution context from the trace, detects reentrancy patterns by analyzing call sequences, reads event logs by scanning for gas-related events, reads transaction history via provider.getTransaction(txHash), and reads failure history due to gas by scanning past failed transactions. The tool fetches event logs by walking backwards in chunks and halving chunk size on failure, ensuring logs are properly read despite varying RPC limitations. The data is formatted and passed to the AI bridge via BGAI.generate() with a structured prompt that includes all the on-chain data read. The AI is instructed to analyze the risk of the transaction running out of gas, recommend an appropriate gas limit based on historical usage, contract complexity, and current network conditions, and warn about potential gas-related failures — while stating plainly that it cannot predict exact gas usage under varying contract state conditions, cannot detect gas limit risks that depend on off-chain conditions or external contract behavior, and cannot guarantee that a transaction will not run out of gas even if the gas limit appears sufficient. The AI response is capped at 1,024 tokens to ensure concise, focused gas limit risk assessments. All computed values are guarded against negative numbers — if a gas limit or estimated gas appears invalid, the tool flags it rather than displaying nonsensical values.

WHAT IT CANNOT SEE

This tool cannot predict exact gas usage under varying contract state conditions. It cannot detect gas limit risks that depend on off-chain conditions or external contract behavior. It cannot guarantee that a transaction will not run out of gas even if the gas limit appears sufficient. It cannot detect malicious intent behind unusual gas limit settings. The AI explanation is generated from on-chain data only and cannot detect off-chain contract state, hidden gas consumption conditions, or social engineering attacks. It cannot predict whether a transaction will encounter gas exhaustion under different conditions. The tool does not continuously monitor gas limit risks; each analysis is a snapshot at the time of the lookup. It cannot detect delayed gas exhaustion, hidden opcode costs, or off-chain factors. The tool does not store any data persistently; all state is in-memory and resets on reload. The AI explanation is informational and does not constitute financial advice, legal advice, or a guarantee of transaction success or protection against gas-related failures.

PLEASE NOTE

Gas Limit Risk Explainer works exclusively with EVM-compatible chains. It requires a Web3 wallet (MetaMask or similar) and the BGWallet bridge. Explanations are AI-generated from data the app reads on-chain — always review what you are actually signing in your wallet before approving it. Gas limit issues carry significant risk including transaction failure, loss of gas fees, and wasted time. Use this tool as a guide only; always cross-check with independent sources and gas estimation tools for critical decisions. This is experimental software; use at your own risk.