Why Rollups Need Data Availability: How EIP-4844 Boosts Ethereum's DA Capabilities

Why Rollups Need Data Availability Layers
Let’s cut through the jargon: data availability (DA) is the backbone of rollup security. Without it, your shiny L2 solution is just a fancy spreadsheet with trust issues. Here’s why:
The Rollup Dilemma
Rollups promise Ethereum-level security at lower costs by moving execution off-chain. But here’s the catch—they still need to prove their state transitions are valid. This requires:
- Optimistic Rollups: Assume transactions are valid unless someone submits fraud proofs within a challenge period
- ZK-Rollups: Use cryptographic proofs to mathematically verify correctness
Both approaches share one non-negotiable requirement: users must be able to reconstruct the rollup’s full state if needed. Enter DA layers.
Ethereum as a DA Powerhouse
Currently, most rollups use Ethereum for DA by embedding data in calldata. But calldata is expensive because it:
- Gets stored permanently in Ethereum history
- Can be accessed by smart contracts (overkill for pure DA)
EIP-4844 changes the game with “blob-carrying transactions”—data packages that:
- Are much cheaper than calldata (~80% cost reduction estimated)
- Automatically expire after ~18 days (perfect for DA needs) The upcoming Cancun-Deneb upgrade will activate this feature.
Inside Proto-Danksharding
The EIP introduces clever innovations:
Blob Economics
A separate fee market prevents L1 congestion from spiking rollup costs. Think of it as an express lane for DA.
KZG Commitments
Blobs use advanced cryptography (BLS12-381 curve) to enable future-proof verification. Our PoC shows circuit validation takes minutes on consumer hardware.
The Road Ahead
While EIP-4844 is revolutionary, its current 380KB/block capacity won’t satisfy all rollups. Full Danksharding with data availability sampling will be the next leap forward.
As I often tell my developer meetup groups: “Good scaling solutions don’t compromise decentralization—they extend it.” With EIP-4844, Ethereum takes another step toward becoming the universal settlement layer Web3 needs.
ChainSight
Hot comment (3)

Rollups akhirnya bisa bernapas lega! 🎉
Dengan EIP-4844, Ethereum memberikan ‘makanan bergizi’ untuk rollups yang kelaparan data. Bayangkan rollup seperti teman kita yang selalu hemat tapi butuh bukti transaksi valid - sekarang ada solusi cerdas dengan biaya lebih murah!
Blob transactions ini kayak promo diskon 80% buat data availability. Dulu mahal karena disimpan permanen, sekarang cukup 18 hari saja - sesuai kebutuhan!
Kerennya lagi, ada jalur khusus (fee market terpisah) biar nggak ketabrak traffic L1. Kaya jalan tol khusus buat pengiriman data!
“Teknologi blockchain terus berkembang, tapi yang penting desentralisasi tetap terjaga,” kata para developer. Setuju banget!
Menurut kalian, apa langkah selanjutnya setelah EIP-4844 ini? 🤔 #Ethereum #Blockchain #HumorCrypto

ว่าไงครับชาวบล็อกเชน!
EIP-4844 นี่เหมือนเมนูประหยัดสำหรับ Rollups เลยนะครับ - ได้”ของแถม”เป็น Data Availability แถมราคาถูกกว่าเดิม 80%! 🤯
ก่อนหน้านี้ใช้ calldata แพงแบบว่า… เหมือนสั่งข้าวผัดแต่ต้องซื้อเครื่องปรุงแยกทุกอย่าง 555+ ตอนนี้มีโปรโมชั่น “บล็อบ” ที่เดลิเวอรี่เร็วและลิมิตเวลาด้วย (18 วันพอดี ไม่สั้นไม่ยาวเกินไป) 🚀
คิดดูสิ: Optimistic Rollups กับ ZK-Rollups เดี๋ยวนี้ไม่ต้องเถียงกันแล้วว่าวิธีไหนดีกว่า เพราะต่างก็ได้ DA จาก Ethereum แบบจัดเต็ม!
สุดท้ายนี้… มีใครนับ KZG Commitments เป็นเกมมิฟิเคชั่นได้บ้างไหม? 😆 #บล็อกเชนไทยไม่ยอมแพ้
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