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 |
|---|---|---|
| keystore-backup | Shell | Encrypted, rotated backups of wallet keystores or validator keys with gpg AES-256, checksums and restore verification |
| keystore-inspector | Go | Inspect Ethereum keystore V3 JSON files without the password: KDF strength, cipher, MAC and address, with weak-parameter warnings |
| solana-token-holders | Python | Show supply and the largest holders of any Solana SPL token from RPC alone, resolving token accounts to their owner wallets |
| blob-basefee-rs | Rust | EIP-4844 blob base fee calculator in Rust using the spec's fake_exponential, with Cancun and Prague update fractions |
| univ3-twap-oracle | Python | Compute a manipulation-resistant TWAP from any Uniswap v3 pool's built-in oracle via observe(), and compare it with the spot price |
| eip1559-sim-rs | Rust | Simulate EIP-1559 base fee dynamics in Rust under demand shocks and see how quickly the fee converges back to the target |
| block-at-timestamp | TypeScript | Find the Ethereum block for any date with an interpolation-guided binary search over JSON-RPC, counting every RPC call |
| erc4337-userop-stats | Python | Account abstraction activity from EntryPoint logs: UserOperation counts, success rate, paymaster share and gas costs over recent blocks |
| rpc-failover-proxy | Go | JSON-RPC reverse proxy with automatic failover across multiple upstreams, cooldowns, a method denylist and a health page |
| proxy-detector | Python | Detect what's behind an EVM address: EOA, EIP-7702 delegated account, EIP-1167 clone, EIP-1967 transparent/UUPS/beacon proxy or plain contract |
| 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 |
...and 32 more in the repositories tab.