Optimism Kovan, the old test network, is deprecated, because the underlying L1 network, Kovan, is deprecated.
Instead, use Optimism Goerli with the Blockscout block explorer (Etherscan support coming soon).
Optimism Kovan, the old test network, is deprecated, because the underlying L1 network, Kovan, is deprecated.
Instead, use Optimism Goerli with the Blockscout block explorer (Etherscan support coming soon).