Projects

A selection of things I've built. Code lives at github.com/Dragonado.

Buzzcoin on Ethereum Sepolia

Solidity, Foundry, C++, Node.js, React, SQLite — Apr 2026

Two EIP-7702 delegate contracts on the Sepolia testnet that ran an entire CS6270 course rubric inside opted-in EOAs. Bundled offline authorization tuples into type-4 transactions so payouts atomically routed delegator → operator within a single tx.

Alongside the delegates I wrote a reentrancy attacker against a DAO-style exploit that drained the cap in one tx via the fallback hook, and a mempool sandwich scanner that polled pending Sepolia txs, simulated them against a local Foundry fork, and flagged profit-after-gas front-run / back-run pairs across two constant-product AMMs — including multi-hop DEX arbitrage cycles on oracle-induced imbalances. A live indexing dashboard tied it together with three ingestion paths: log replay, direct storage polling, and inner [CALL]-frame attribution to capture EIP-7702 delegated calls.

Corrent — BitTorrent client from scratch

Rust — Oct 2025

A memory-safe BitTorrent client covering the full protocol stack: Bencode serialization (custom recursive-descent decoder for all wire-format types), tracker HTTP API, and peer-to-peer TCP communication with handshake negotiation, choke / unchoke state machine, and sequential piece request / response logic against live peers. SHA-1 piece integrity verification against the torrent manifest for every chunk.

CodePal — VSCode extension for competitive programmers

TypeScript — ongoing

Marketplace · One of the lead maintainers. Testcase fetching, parallel runs against a brute force, stress testing, snippets — the things you actually need during a contest. 6000+ users worldwide.

Competitive programming problem sets

Various judges — 2020–present

Problem repo collects prompts, editorials, and reference solutions for problems I've set for ICPC 2022 regional rounds, CodeChef, and CodeDrills.