Ethereum and DeFi tooling in Python, Go, TypeScript, Solidity and Rust. Most of it reads data from the chain over JSON-RPC: AMM and gas math, contract state, EVM internals.
- univ3-tick-math: Uniswap v3 tick, price and sqrtPriceX96 conversions
- matching-engine-go: limit order book with price-time priority
- eth-checksum-address: EIP-55 checksums with a pure-Python Keccak-256
| Project | Language | Description |
|---|---|---|
| code-hash-compare | Go | Check whether the same address holds identical bytecode on several EVM chains by hashing eth_getCode results |
| eth-burn-tracker | Python | Measure ETH burned by EIP-1559 base fees and EIP-4844 blob fees over recent blocks, from block headers and fee history |
| wallet-connect-demo | JavaScript | Plain-JS wallet connection demo with EIP-6963 multi-wallet discovery, chain switching, balance lookup and message signing |
| block-builder-share | Python | Measure Ethereum block builder market share over recent blocks from on-chain extraData and fee recipients |
| l2-fee-compare | TypeScript | Compare the current cost of a transfer and a swap across Ethereum, L2s and sidechains using live gas prices and token prices |
| vanity-difficulty | Python | Estimate how long a vanity address search takes for EVM, Solana and Bitcoin prefixes at a given key rate |
| utxo-coin-selection | Go | Bitcoin coin selection with Branch and Bound (changeless) and largest-first fallback, scored by the waste metric |
| sandwich-attack-sim | Rust | Simulate MEV sandwich attacks on a constant-product pool to see how slippage tolerance determines what a searcher can extract |
| solana-epoch-progress | Python | Solana epoch progress and ETA from RPC slot data, using recent performance samples for real slot times |
| btc-block-intervals | Go | Analyze recent Bitcoin block intervals from mempool.space and compare them with the exponential distribution of a Poisson process |
| crypto-address-classifier | Python | Identify which chain and address type a string belongs to (EVM, Bitcoin, Solana, Tron, Cosmos, Litecoin...) with checksum checks |
| calldata-decoder | TypeScript | Decode ERC-20/ERC-721/WETH transaction calldata by selector and flag risky patterns like unlimited approvals |
| rpc-timing-sh | Shell | Break down JSON-RPC latency into DNS, TCP, TLS and server time with curl timing variables, to see where the milliseconds go |
| gas-oracle-server | Go | HTTP gas oracle serving EIP-1559 fee suggestions from eth_feeHistory percentiles, refreshed in the background |
| rpc-list-audit | Python | Find dead endpoints in the chainlist and ethereum-lists RPC lists, reporting only failures that look the same from anywhere: NXDOMAIN, HTTP 410, revoked API keys, wrong chain id |
...and 22 more in the repositories tab.