Contract Proxy Upgrade Risk Explainer

WHAT IT DOES

Contract Proxy Upgrade Risk Explainer reads live on-chain data from any EVM proxy contract and uses AI to detect upgrade risks, malicious admin controls, and implementation vulnerabilities. It examines the proxy's bytecode to identify the current implementation address through standard storage slots. It analyzes proxy admin address and access control patterns to determine who can perform upgrades. It scans for upgrade function signatures including upgradeTo(), upgradeToAndCall(), setImplementation(), and upgrade(). It detects timelock configurations and delay periods. It analyzes implementation change frequency and history through event logs. It identifies delegatecall patterns, selfdestruct risks in implementations, and storage collision vulnerabilities. The AI generates a plain-language verdict—SAFE, RISKY, or CRITICAL—along with specific explanations of the upgrade risks before you interact with or invest in the proxy contract.

HOW TO USE

Paste any EVM proxy contract address into the input field. The tool reads the contract's bytecode and queries standard proxy storage slots to identify the current implementation address. It reads proxy admin storage to identify who controls upgrades. It scans bytecode for upgrade function signatures using 4-byte method identifiers—upgradeTo() (0x3659cfe6), upgradeToAndCall() (0x4f1ef286), setImplementation() (0x51cff8d9), and upgrade() (0x5c60da1b). It detects proxy patterns including standard fallback delegatecall and calldata copy patterns. The AI receives all this data and returns a verdict: SAFE (multisig or timelock controlled with verified implementation), RISKY (single-admin upgrade capability with no timelock), or CRITICAL (upgrade function allows arbitrary code execution, selfdestruct in implementation, or unverified implementation). The AI also provides a detailed plain-language explanation of the specific upgrade risks and who controls them.

STORAGE SLOT READING AND PROXY PATTERN DETECTION

The tool reads the proxy's implementation address from the standard EIP-1967 storage slot (0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc) and the admin address from the EIP-1967 admin slot (0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103). It also attempts alternate storage slots for non-standard proxy patterns. It scans the proxy bytecode for common proxy implementation patterns including the fallback function with delegatecall (0x3d602d) and calldata copy (0x3600). It identifies upgrade function signatures in the bytecode to determine upgrade capability. It analyzes the implementation bytecode for selfdestruct, delegatecall to arbitrary addresses, and other dangerous patterns. If the implementation is not verified on a block explorer, this is flagged as a risk since users cannot independently verify the code. The tool also checks whether the admin address is an EOA (externally owned account) or a contract, with EOAs representing higher risk.

WHAT IT CANNOT SEE

This tool cannot detect off-chain governance decisions or upgrade intent—a proxy could have perfect on-chain security but be controlled by a malicious team off-chain. It cannot analyze bytecode that is obfuscated beyond EVM disassembly limits. It cannot verify if a proposed implementation is safe without source code—it can only detect dangerous opcode patterns, not logical vulnerabilities. It cannot detect upgrade risks that depend on off-chain conditions or specific block timing. It cannot predict future upgrade behavior or intentions. It cannot detect upgrade mechanisms that use non-standard proxy patterns or custom implementations that do not follow EIP-1967 standards. It cannot see pending upgrade transactions not yet in the mempool. It cannot verify that a timelock, if present, has not been bypassed through an upgrade to the proxy itself.

PLEASE NOTE

EVM chains only. This tool reads on-chain data and generates AI explanations—it does NOT sign transactions or execute any on-chain actions. The wallet's own signature prompt remains the final gate for every real action. Always review the exact transaction details in your wallet before approving any contract interaction. The AI assessment is informational only and does not constitute financial or security advice. Always verify proxy upgrade details independently through block explorers and official project documentation before assuming any proxy contract is safe to interact with.