q9f.cc

dev.to/q9
github.com/q9f
bsky.app/q9f.cc
stackoverflow.com/users/1260906/q9f

ruby/rails

q9f/eth.rb - ethereum signer and rpc-client
q9f/keccak.rb - ethereum's sha3-flavor digest
q9f/ethereum-on-rails - rails authentication w/ metamask

crystal

q9f/secp256k1.cr - pure crystal secp256k1 ecdsa
q9f/bip39.cr - pure crystal bip-0039 mnemonics
q9f/rlp.cr - pure crystal rlp serializer

meta

eth-clients/holesky - holesky merged-from-genesis, public ethereum testnet
eth-clients/sepolia - sepolia ethereum cross-client proof-of-authority testnet
goerli/medalla - medalla ethereum multi-client consensus testnet
goerli/testnet - goerli ethereum cross-client execution testnet
eth-classic/mordor - an ethereum classic pow testnet to replace morden
ethereum/ropsten - rospten ethereum proof-of-work execution testnet

specifications

fip-0039: filecoin message replay protection
eip-1716: hardfork meta: petersburg
eip-1679: hardfork meta: istanbul
eip-1234: constantinople difficulty bomb delay and block reward adjustment
eip-0999: restore contract code at 0x863df6bfa4469f3ead0be8f9f2aae51c91a907b4
eip-0649: metropolis difficulty bomb delay and block reward reduction

publications

presentations

web3 privacy 2024: collective, non-profit, private - organizing large-scale, public events the "hard way"
devconnect 2023: holešky - a proof-of-stake testnet ahead of mainnet
protocol berg 2023: opening & closing ceremony
ethereum berlin 03/2023: görli, sepolia, holešky
devcon 2022: post-merge testnets
edcon 2020 keynote: final road to ethereum 2.0 - multi-client testnets
ethcc 2020: why you don't want to develop on the ropsten testnet
etc summit 2019: state of the ethereum classic testnets
etc summit 2019 keynote: atlantis hardfork and beyond
ethparis 2019 workshop: getting started w/ ethereum nodes
ethcc 2019: what's the goerli testnet and why do you care
goerlicon 2019: goerli testnet launch
ethereum berlin 03/2016: ethereum stack-exchange

conferences

this website works without javascript, css, cookies, consent popups, dark mode, google fonts, cdn, captchas, or ai chatbot for everyone's convenience.