27. September 2023

Avail Launches Testnet Bridge for Low-Cost Layer 2s

• Avail has launched a data availability bridge to Ethereum, allowing developers to create low-cost layer 2s.
• The bridge will allow users to withdraw cryptocurrency from layer 2 back to the base layer of Ethereum.
• The Data Availability attestation bridge marks a major advancement in optimizing blockchain scalability and efficiency.

Avail Launches Testnet Bridge

Avail recently launched a testnet data availability bridge that will transmit data availability attestations to Ethereum, potentially allowing for lower fees on some layer 2s. This bridge was created by Polygon Labs, but is now an independent project with founder Anurag Arjun leading it.

What Are Layer-2 Rollups?

Layer-2 rollup networks like Optimism, Arbitrum, Polygon zkEVM, and zkSync Era aim to reduce transaction fees by batching transactions into compressed “rollups” and periodically adding them to the base layer. These networks typically have higher transaction fees than their layer-1 competitors but validiums can help solve this issue by writing only the validation proofs of each transaction onto the base layer. For example, StarkEx features a validium mode that stores data with a DAC rather than on Ethereum while Polygon proof-of-stake may also become a validium that stores its data on a proof-of-stake chain in 2024.

The Benefits Of Avail’s Bridge

Avail’s new bridge allows developers to quickly and easily create custom validiums by storing their transaction data on the Avail network instead of creating their own DAC or proof-of-stake data availability network. When users try withdrawing cryptocurrency from layer 2 back onto the base level of Ethereum, the Avail bridge will transmit an attestation verifying that all necessary data is available on Avail which allows for successful withdrawal.

Optimizing Blockchain Scalability & Efficiency

The launch of this Data Availability attestation bridge provides major benefits in terms of optimizing blockchain scalability and efficiency as it enables rollup constructions to run in validium, optimistic chains and volition modes; reducing costs while paving the way for future developments around scalability solutions such as sharding or sidechains.


Overall, Avail’s new Data Availability attestation bridge is another big step forward when it comes to scaling blockchain networks while also providing developers with an easier way to create custom validiums without needing additional infrastructure or complicated setup processes.