The Ethereum community has proposed upgrading the eth/73 protocol to support the propagation of raw signed witness data.

November 12 — Ethereum developer Marchhill submitted draft EIP-8437, proposing to propagate Proof Wrapper data via the eth/73 protocol and add an optional mode that allows transactions to submit raw signatures to an aggregator without pre-generating STARK proofs. The proposal supports propagating authenticated packages directly with transactions and executing independent checks of specified programs in a resource-constrained sandbox to verify witness data.

New programs would no longer require developing native adapters separately for each signature scheme. In addition, the proposal plans to limit batch queue size, clean up expired transactions, and re-check records before formally generating proofs to support retries on failure. The proposal is currently still in the Draft stage and has not yet been merged. Developers noted that VM and key-binding consistency verification, cryptographic verification, and performance testing remain incomplete, and no benchmarking has yet been conducted.