{"document_id":"BLC-STUDY-0032","slug":"lazyledger","title":"LazyLedger: A Distributed Data Availability Ledger With Client-Side Smart Contracts","authors":"Mustafa Al-Bassam","year":2019,"date_label":"2019","publisher":"Mustafa Al-Bassam","paper_type":"Design paper","category":"Scaling","topics":["Scaling"],"source_url":"https://arxiv.org/pdf/1905.09274","source_label":"arXiv:1905.09274","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":"Al-Bassam's LazyLedger paper, the research origin of Celestia. The base layer orders and makes data available. It does not execute application transitions. Clients check availability with sampling, and applications execute on their own.","canonical_url":"https://blockchainlab.com/whitepaper/lazyledger","record_url":"https://blockchainlab.com/research/corpus/papers/lazyledger","study_url":"https://blockchainlab.com/whitepaper/lazyledger","last_reviewed":"2026-10-01","last_checked":"2026-10-01","relationships":[{"rel":"Canonical reading","label":"Celestia study","href":"/whitepaper/lazyledger"},{"rel":"Related paper","label":"Plasma","href":"/whitepaper/plasma"},{"rel":"Related paper","label":"Mina","href":"/whitepaper/mina"},{"rel":"Related paper","label":"Polkadot","href":"/whitepaper/polkadot"}]}