IOHK will be restarting the Cardano Byron testnet with a fresh genesis block on 29 July. This will not impact the Jormungandr Cardano Shelley Testnet or users of mainnet cluster. You will need to create new wallets and refetch funds from the faucet after the restart of testnet. connectScripts for this testnet are updated on the develop branch of cardano-sl and a Daedalus Installer for testnet will be published on 30 July. This will be available on the Cardano testnet website. The URLs for faucet, explorer and wallet endpoints will remain the same.

We have decided to restart the Cardano Byron Testnet to shrink the blockchain to a manageable size for users so they do not have to wait as long for chain synchronization similar to the process followed for the Bitcoin testnet. We are doing this in anticipation of the new Haskell Byron-Shelley rollout expecting a large spike in users interested in evaluating the new tooling the team is working diligently to provide to end users in the near future.

Actions you need to do if running a Daedalus instance on the testnet:

Wait for Daedalus 0.14.0 to be available on the Cardano testnet website Follow instructions in the Reinstallation support article

Actions you need to do if running connectScripts from cardano-sl:

git checkout develop rm -rf state-wallet-testnet state-explorer-testnet nix-build -A connectScripts.wallet.mainnet -o launch_testnet_wallet (for wallet API) nix-build -A connectScripts.explorer.mainnet -o launch_testnet_explorer (for explorer API) Run launch script

You will need to create new wallets and refetch funds from the faucet after the restart of testnet.