Ethereum’s scaling and execution transitions via Fusaka upgrade

The Fusaka upgrade delivers necessary scaling for Layer 2 networks. PeerDAS provides a way to scale data throughput by using sampling and erasure coding. The implementation of PeerDAS through EIP-7594 allows nodes to verify data availability by requesting small random fragments from peers rather than downloading entire blobs, which reduces the bandwidth requirements for individual validators. This mechanism enables Ethereum to scale blob capacity by increasing the number of encoded fragments without increasing per node bandwidth. Data remains reconstructable from any 50 percent of nodes. PeerDAS replaces blob proofs with a new format called cell proofs. EIP-7892 allows for Blob Parameter Only hard forks to adjust capacity without a full coordinated upgrade. EIP-7918 ensures a reserve price for blob gas that depends on execution gas conditions to prevent fee collapse. EIP-7939 adds a CLZ opcode for faster bit operations, while EIP-7951 provides native verification support for the secp256r1 elliptic curve. Developers postponed the EVM Object Format (EOF) deployment because Verkle tree requirements in the Pectra upgrade took precedence. This postponement avoids the technical debt of maintaining multiple code validators for both the old EVM and EOF. Without static jumps, the EVM remains vulnerable to quadratic path explosion during symbolic execution. Can the network manage the complexity of maintaining two execution environments simultaneously?

The Prague-Electra upgrade changed how validators interact with the chain. EIP-7002 allows users to initiate withdrawals using only an execution layer withdrawal key, moving withdrawal processes from the consensus layer to the execution layer. You should monitor your validator status closely after such shifts. EIP-7251 increases the maximum stake per validator to 2048 ETH, though the minimum remains 32 ETH. EIP-7685 provides the framework for communication between the execution and consensus layers by adding a requests_hash field to the execution block header. This field facilitates direct requests from contracts to the consensus layer. EIP-6110 moves deposit processing to the execution layer to reduce complexity. Deposits now process via deposit contract log events in the same block where they appear, which completes a deposit in 13 minutes instead of 13 hours. Pectra also introduced account abstraction through EIP-7702, allowing regular addresses to delegate operations to smart contracts.

Fusaka increases the default block gas limit to 60 million. This expansion supports larger rollup batches and complex contract interactions. However, the upgrade caused a significant participation drop for Prysm validators. Participation fell from 97 percent to 77 percent around epoch 411440 because stale attestations forced nodes to regenerate old states. Some nodes switched away from the builder API and fell back to local block building to keep producing blocks. PeerDAS reduces full node disk and download needs by 80 percent. Dasmon reported missing data because late blob deliveries prevented probes from seeing information within ideal time windows. Nethermind reported an invalid block at slot 13164552 when running with Nimbus due to a specific Nix-based build environment. A late block at slot 13164887 arrived 4.65 seconds late but became part of the canonical chain after a subsequent block received enough attestations. EIP-7823 and EIP-7883 update the MODEXP precompile by capping input size and adjusting gas costs to prevent denial of service risks. EIP-7825 sets a hard upper limit on gas consumption per transaction. EIP-7934 adds a 10 MiB RLP block size limit to reduce propagation delays. EIP-7917 gives proposers earlier visibility into upcoming slots to help with MEV smoothing. Builders should provision 100 Mbps upload capacity to stay in sync.