{"document_id":"BLC-STUDY-0314","slug":"eip-2124","title":"Fork identifier for chain compatibility checks","authors":"Péter Szilágyi , Felix Lange","year":2019,"date_label":"2019","publisher":"Péter Szilágyi , Felix Lange","paper_type":"Design paper","category":"Storage and networks","topics":["Storage and networks"],"source_url":"https://eips.ethereum.org/EIPS/eip-2124","source_label":"EIP 2124","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 2019 study. The study is the reading. This page does not add a second essay.","doi":null,"rights_status":"Official external source only","source_status":"Official source","use_status":"Metadata and commentary only. The reading is the study page.","licence":null,"licence_label":"No licence recorded. Rights status under review.","full_text":null,"full_text_reason":"Full text is not published on this page. Public availability is not a licence to republish a document. Blockchain Lab has not recorded a licence that permits an HTML transcription, a training set, or a retrieval corpus of the paper. Text on this page is Blockchain Lab's own wording, or a pointer to a study that is also Blockchain Lab's wording.","editorial_line":"EIP 2124, Fork identifier for chain compatibility checks. Currently nodes in the Ethereum network try to find each other by establishing random connections to remote machines \"looking\" like an Ethereum node (public networks, private networks, test networks, etc), hoping that they found a useful peer (same genesis, same forks).","canonical_url":"https://blockchainlab.com/whitepaper/eip-2124","record_url":"https://blockchainlab.com/research/corpus/papers/eip-2124","study_url":"https://blockchainlab.com/whitepaper/eip-2124","last_reviewed":"2026-10-01","last_checked":"2026-10-01","relationships":[{"rel":"Canonical reading","label":"EIP 2124 study","href":"/whitepaper/eip-2124"},{"rel":"Related paper","label":"Filecoin","href":"/whitepaper/filecoin-2017"},{"rel":"Related paper","label":"Arweave","href":"/whitepaper/arweave"},{"rel":"Related paper","label":"IPFS","href":"/whitepaper/ipfs"}]}