{"document_id":"BLC-STUDY-1695","slug":"bip-434","title":"Peer Feature Negotiation","authors":"Anthony Towns","year":2026,"date_label":"2026","publisher":"Anthony Towns","paper_type":"Design paper","category":"Storage and networks","topics":["Storage and networks"],"source_url":"https://github.com/bitcoin/bips/blob/master/bip-0434.md","source_label":"BIP 434","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 2026 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/bip-434.md under BSD-2-Clause. The canonical file remains the source URL. The desk study is separate.","licence":"BSD-2-Clause","licence_label":"BSD-2-Clause","full_text":"https://blockchainlab.com/primary/bip-434.md","full_text_reason":"Mirrored from the upstream file under BSD-2-Clause. Desk wording is not part of that licence and is not a training grant.","repository":"https://github.com/bitcoin/bips","editorial_line":"A desk note on BIP 434 (Peer Feature Negotiation). The file's status is Complete. The note records the text. It does not measure who runs it.","canonical_url":"https://blockchainlab.com/whitepaper/bip-434","record_url":"https://blockchainlab.com/research/corpus/papers/bip-434","study_url":"https://blockchainlab.com/whitepaper/bip-434","last_reviewed":"2026-10-01","last_checked":"2026-10-01","relationships":[{"rel":"Canonical reading","label":"BIP 434 study","href":"/whitepaper/bip-434"},{"rel":"Related paper","label":"Filecoin","href":"/whitepaper/filecoin-2017"},{"rel":"Related paper","label":"IPFS","href":"/whitepaper/ipfs"},{"rel":"Related paper","label":"Kademlia","href":"/whitepaper/kademlia"}]}