BitcoinNews Celestia Rival Avail Inks Agreement With Starkware as Blockchain Data Race Heats Up By cryptonaut On Dec 20, 2023 0 0 Avail’s new “data availability” solution, currently in testing, and Madara, which is Starkware’s sequencer, are both expected to go live in early 2024. They might be used in conjunction to create new application chains or “appchains.”