Avail launched a bridge to transmit data availability attestations to Ethereum, potentially allowing for lower fees on some layer 2s.

Polygon spinoff launches testnet bridge to allow for low-cost layer 2s](https://cointelegraph.com/news/polygon-spinoff-launches-testnet-bridge-to-allow-for-low-cost-layer-2s))
Avail launched a bridge to transmit data availability attestations to Ethereum, potentially allowing for lower fees on some layer 2s.