  Despite their increasing popularity, blockchains still suffer from severe
scalability limitations. Recently, Ethereum proposed a novel approach to block
validation based on Data Availability Sampling (DAS), that has the potential to
improve its transaction per second rate by more than two orders of magnitude.
DAS should also significantly reduce per-transaction validation costs. At the
same time, DAS introduces new communication patterns in the Ethereum
Peer-to-Peer (P2P) network. These drastically increase the amount of exchanged
data and impose stringent latency objectives. In this paper, we review the new
requirements for P2P networking associated with DAS, discuss open challenges,
and identify new research directions.
