Blockchain CTF

Solve blockchain and Web3 lab tasks by treating source, bytecode, storage, transactions, and contract state as one evidence graph, then proving the shortest exploit sequence on a local fork or authorized testnet.

When this skill applies

• Solidity, Vyper, EVM bytecode, ABI, deployed address lists, RPC URLs, transaction hashes, UTXO transaction IDs, event logs, contract frontends, or wallet-signature flows.
• Blockchain-forensics tasks involving peel chains, mixer-like fan-out/fan-in, transaction graph reconstruction, explorer APIs, account/UTXO flow tracing, internal transactions, or address clustering clues.
• Smart-contract patterns: proxy, factory, upgradeable implementation, delegatecall, low-level call, reentrancy, selfdestruct, storage collision, signature replay, oracle manipulation, governance, betting/market state, token accounting, calldata tricks, or ZK verifier logic.
• Tool cues: Foundry, Hardhat, cast, forge, anvil, solc, Slither, Mythril, Echidna, ethers.js, web3.py, blockchain explorer, or local fork.

Operating model