Cardano FAQ

How can I import a Byron wallet into Daedalus from an SQLite file?

First you need to use sqlite3 to view the root and hash fields of the private_key table for the wallet in question, and the run Daedalus and use netstat to check what port it's node is running on. Of course this will not help in the case of retrieving ITN funds in the main net, but it can at least prove that the wallet file is intact and whether or not you have the spending password.

cd ~/.local/share/Daedalus/mainnet
curl -H "Content-Type: application/json" -kE tls/client/client.pem \
  -XPOST https://localhost:PORT/v2/byron-wallets -d '{ \
    "style":"random", \
    "name":"NEW_WALLET_NAME", \
    "encrypted_root_private_key":"ROOT_KEY", \
    "passphrase_hash":"HASH_KEY" \
  }'

Update: The friendly folk at Viper Staking have made a version of Cardano wallet that extracts the keys from an ITN Byron wallet called Cardano-wallet-key-extractor that runs in a Docker container. Once you have those keys, you can then run through their existing Restore ITN reward keys documentation which guides ITN stake pool operators through accessing their rewards using their pool keys.