Proxy Storage Collision Risk Explainer

WHAT IT DOES

Proxy Storage Collision Risk Explainer is a read-only tool that analyzes proxy contracts for storage collision vulnerabilities, generating AI-powered plain-language explanations of storage layout risks. It reads contract bytecode, proxy pattern detection, implementation address, proxy admin address, storage layout of the proxy, storage layout of the implementation, storage slot conflicts, storage collision indicators, upgrade history, transaction history, event logs, contract creation block, privileged function signatures, delegatecall usage patterns, and immutability flags. The tool then presents this data alongside an AI-generated analysis of storage collision risks, identifying conflicting storage layouts between proxy and implementation, and recommending mitigation strategies — helping you understand the risks before interacting with or relying on a proxy contract.

HOW TO USE

Connect your wallet using the BGWallet bridge and select your target network. Enter the proxy contract address you want to analyze. Optionally enter the implementation address (auto-detected if not provided). Click "Analyze storage collision" to read on-chain contract data. The tool displays the proxy address, implementation address, proxy admin, proxy pattern, and storage collision risk level (Low/Medium/High). A prominent warning banner appears if a storage collision is detected. Detailed information includes conflict count, conflicting slots, proxy storage layout, implementation layout, upgrade history, privileged functions, delegatecall usage, and immutability flags. A mitigation strategy box provides specific recommendations. An AI explanation appears below the on-chain data, analyzing the storage layout of the proxy and its implementation for collision risks, identifying conflicting storage slots, overlapping variables, or other patterns that could lead to storage corruption during delegatecall, and recommending mitigation strategies such as storage gap patterns, namespaced storage, or layout verification before you interact with or rely on the proxy contract. 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 contract data. No hardcoded contract addresses are used — you are always in control of which contract you trust. When analyzing storage collision risks, the tool reads the contract bytecode via provider.getCode(proxy) and provider.getCode(implementation), detects proxy patterns by scanning for known proxy opcode patterns and storage slots (e.g., EIP-1967 implementation slot), reads the implementation address from the proxy storage slot, reads the proxy admin address from the proxy storage slot, analyzes the storage layout of the proxy by reading storage slots (e.g., via provider.getStorageAt()), analyzes the storage layout of the implementation by reading its storage slots, detects storage slot conflicts by comparing the storage layouts of the proxy and implementation, detects storage collision indicators by analyzing storage slot usage patterns, reads upgrade history by scanning event logs (e.g., Upgraded events), reads transaction history via provider.getTransactionCount(proxy), reads event logs by scanning for upgrade-related events, reads the contract creation block via provider.getTransactionReceipt(proxy), reads privileged function signatures by analyzing function selectors, detects delegatecall usage patterns by scanning the bytecode for DELEGATECALL opcodes, and reads immutability flags by analyzing the bytecode. 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 storage layout of the proxy and its implementation for collision risks, identify conflicting storage slots, overlapping variables, or other patterns that could lead to storage corruption, and recommend mitigation strategies — while stating plainly that it cannot detect storage collisions that involve off-chain storage changes or non-standard proxy patterns, cannot guarantee that future upgrades will maintain storage compatibility, and cannot detect storage collisions in contracts using inline assembly or custom storage layouts not reflected in the bytecode. The AI response is capped at 1,024 tokens to ensure concise, focused storage collision risk assessments. All computed values are guarded against negative numbers — if a storage slot or block number appears invalid, the tool flags it rather than displaying nonsensical values.

WHAT IT CANNOT SEE

This tool cannot detect storage collisions that involve off-chain storage changes or non-standard proxy patterns. It cannot guarantee that future upgrades will maintain storage compatibility. It cannot detect storage collisions in contracts using inline assembly or custom storage layouts not reflected in the bytecode. It cannot detect off-chain social engineering attacks leading to proxy upgrades. The AI explanation is generated from on-chain data only and cannot detect off-chain storage changes, hidden storage layout modifications, or social engineering attacks. It cannot predict whether a future upgrade will introduce storage collisions. The tool does not continuously monitor storage collision risks; each analysis is a snapshot at the time of the lookup. It cannot detect delayed storage corruption, proxy upgrades, 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 contract safety or protection against storage collisions.

PLEASE NOTE

Proxy Storage Collision 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. Storage collisions carry significant risk including storage corruption, loss of contract state, and complete loss of funds. Use this tool as a guide only; always cross-check with independent sources and contract audits for critical decisions. This is experimental software; use at your own risk.