Newly Launched Testnet Bridge Enables Low-Cost Layer 2 Solutions on Polygon Spinoff

Avail, a blockchain network, has recently unveiled a testnet data availability bridge to Ethereum, as announced on July 7. This development aims to provide developers with a seamless method of creating “validiums” or cost-effective layer 2s that don’t store complete transaction data on the Ethereum network.

Initially established by Polygon Labs, Avail became an independent project in March. Anurag Arjun, the co-founder of Polygon, also serves as the founder of Avail.

Layer-2 rollup networks such as Optimism, Arbitrum, Polygon zkEVM, and zkSync Era significantly reduce transaction fees by consolidating transactions into compressed “rollups” and periodically adding them to the base layer. However, due to the requirement of writing all transactions to the base layer, these networks often incur higher transaction fees compared to layer-1 competitors.

To overcome this challenge, some networks have chosen to write only validation proofs of each transaction to the base layer while storing the complete transaction data off-chain. This results in the formation of a “validium” network. For example, StarkEx implements a validium mode that stores data with a data availability committee (DAC) rather than on Ethereum. Polygon’s proof-of-stake system may also adopt a validium approach by storing its data on a proof-of-stake chain in 2024.

The recent announcement explains that the new bridge empowers developers to swiftly and effortlessly create customized validiums by storing their transaction data on the Avail network, eliminating the need to establish their own DAC or proof-of-stake data availability network. When a user intends to withdraw cryptocurrency from layer 2 back to the base layer of Ethereum, the Avail bridge will transmit an attestation confirming the data’s availability on Avail, thereby enabling the withdrawal.

Anurag Arjun emphasized the significance of the Data Availability attestation bridge launch, stating, “Today’s launch of the Data Availability attestation bridge marks a significant step forward in our mission to optimize blockchain scalability and efficiency. By enabling rollup constructions to operate in validium, optimistic chains, and volition modes, we are not only reducing costs but also paving the way for a more inclusive and efficient layer-2 and layer-3 ecosystem.”

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