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getmefcknabi

Unverified contracts? No problem.

Stop wasting time hunting down ABIs. We decompile smart contract bytecode to generate the ABI you need, instantly - even when contracts are unverified on Etherscan.

How it works:

  • 1.We extract the 4byte function selectors from the contract bytecode
  • 2.Match these selectors against known function signatures using keccak256
  • 3.Look up proxy implementations and follow DELEGATECALL patterns
  • 4.Construct a working ABI that's compatible with wagmi and viem

Powered by @shazow's WhatsABI - the genius library that makes this all possible. Works even when Etherscan verification fails you.

📦Use Our NPM Package

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Pro tip: Use the interactive mode for the best experience! It provides step-by-step guidance and automatically detects common contract patterns.

Our CLI tool makes it easy to extract ABIs from any terminal. Works across all EVM chains!

$Install globally
$npm install -g getmefcknabi
$Interactive mode (recommended)
$npx getmefcknabi --interactive
$Direct usage
$npx getmefcknabi -a 0x1F98431c8aD98523631AE4a59f267346ea31F984 -c 1 -f json

⚠️The Etherscan Problem

Over 30% of contracts on mainnet are unverified. This means you can't see their source code or ABI. If you want to interact with them, you're stuck.

✅Our Solution

We analyze the raw bytecode directly from the blockchain to reconstruct the ABI. No verification needed. Works with any EVM chain.

See it in action:

➜ Contract 0x1F98431c8aD98523631AE4a59f267346ea31F984 [UNVERIFIED]

➜ getmefcknabi generates: [getPool, createPool, setOwner, owner, ...]

Our algorithm can recover function names, inputs, outputs, and more - even from proxied or complex contracts.

🧪 For Developers

Build tools that interact with any contract

🔍 For Researchers

Analyze contracts without source code

🛡️ For Security

Inspect unverified contracts for vulnerabilities

Created with ❤️ by blockchain dev bezata who got tired of missing ABIs