{"document_id":"BLC-STUDY-1265","slug":"eip-170","title":"Contract code size limit","authors":"Vitalik Buterin","year":2016,"date_label":"2016","publisher":"Vitalik Buterin","paper_type":"Design paper","category":"Consensus","topics":["Consensus"],"source_url":"https://github.com/ethereum/EIPs/blob/master/EIPS/eip-170.md","source_label":"EIP 170","legacy_pdf_path":null,"sha256":null,"sha256_note":"No hash is published. This build does not store those PDF bytes, so a checksum would be invented. Where a legacy path exists, it points at the Internet Archive copy of the old library.","version":"Source cited by the 2016 study. The study is the reading. This page does not add a second essay.","doi":null,"rights_status":"Licensed for redistribution","source_status":"Official source","use_status":"The upstream file is mirrored at /primary/eip-170.md under CC0-1.0. The canonical file remains the source URL. The desk study is separate.","licence":"CC0-1.0","licence_label":"CC0-1.0","full_text":"https://blockchainlab.com/primary/eip-170.md","full_text_reason":"Mirrored from the upstream file under CC0-1.0. Desk wording is not part of that licence and is not a training grant.","repository":"https://github.com/ethereum/EIPs","editorial_line":"A desk note on EIP 170 (Contract code size limit). The file's status is Final. The note records the text. It does not measure who runs it.","canonical_url":"https://blockchainlab.com/whitepaper/eip-170","record_url":"https://blockchainlab.com/research/corpus/papers/eip-170","study_url":"https://blockchainlab.com/whitepaper/eip-170","last_reviewed":"2026-10-01","last_checked":"2026-10-01","relationships":[{"rel":"Canonical reading","label":"EIP 170 study","href":"/whitepaper/eip-170"},{"rel":"Related paper","label":"PBFT","href":"/whitepaper/pbft"},{"rel":"Related paper","label":"Tendermint","href":"/whitepaper/tendermint"},{"rel":"Related paper","label":"HotStuff","href":"/whitepaper/hotstuff"}]}