Ethereum researchers are exploring a significant architectural upgrade, dubbed "Block-in-Blobs," designed to dramatically reduce the data burden on network validators and pave the way for greater scalability. The proposal, formally known as EIP-8142, was detailed in a recent research post titled "Blocks Are Dead. Long Live Blobs," co-authored by Toni Wahrstätter and other Ethereum contributors.
The core innovation involves moving execution-payload data—the transaction details validators must currently download and re-execute—into a specialized data format called "blobs." Blobs were introduced in March 2024 as part of Ethereum's Dencun upgrade via EIP-4844 (proto-danksharding). They are designed to carry large chunks of data more efficiently than standard transaction calldata by allowing data to be committed cryptographically and verified without requiring full replication across the entire network.
EIP-8142 extends this concept by embedding the core transaction data, already encoded in Ethereum's standard RLP format, directly into blobs themselves. This shift means validators would verify cryptographic commitments to these blobs and, ultimately, rely on "data availability sampling." This technique allows them to verify that the full dataset exists by checking only small, random portions of it, eliminating the need to download the entire payload. This directly addresses a growing bottleneck: as block sizes and gas limits increase, the bandwidth demands on validators rise, creating pressure that limits network scalability.
The proposal becomes particularly crucial for a future where zkEVM (Zero-Knowledge Ethereum Virtual Machine) systems handle execution verification. "Under zkEVM, validators verify proofs, not transactions directly," Wahrstätter noted. While zero-knowledge proofs can confirm correct transaction processing, they do not guarantee that the underlying transaction data is available. The Block-in-Blobs design closes this gap by making data availability explicit through cryptographic commitments within the blobs, preserving security while enabling efficient verification.
The upgrade also has broader implications for Ethereum's economic model. Currently, the network separates execution gas fees from blob data usage. The new model could unify these into a single "data gas" system, aligning costs across all forms of data availability and avoiding overlapping limits.
In a parallel development aimed at improving user experience, Biconomy, in collaboration with the Ethereum Foundation's UX track, has proposed ERC-8211. This new standard aims to turn transactions into programmable workflows. Instead of having fixed parameters set at signing, ERC-8211 would allow transactions to fetch real-time onchain data, validate conditions, and execute multiple steps in sequence with a single signature. The goal is to reduce failed transactions and enable more complex, agent-driven interactions across DeFi protocols.
Both EIP-8142 and ERC-8211 represent a continued wave of experimentation and long-term upgrade planning within the Ethereum ecosystem, with researchers outlining multi-year development paths through the end of the decade.
