Ethermint
Ethermint is a Cosmos SDK library for running scalable EVM chains
... on Ethermint so that Ethereum keys and signing would all be compatible. Since the Cosmos-SDK’s keyring doesn’t explicitly support locking and unlocking of keys the way Ethereum does, a workaround had to be implemented. Unlocking a key is done by exporting it from the Cosmos keyring via decrypting the file and storing it in memory. Locking the key deletes it from memory, leaving it only as an encrypted file on-disk.