Redeeming rewards from ITN with private/public keys
If you ran a stake pool on the ITN but you only have a key pair and not a recovery phrase, you need to convert your ITN keys into Shelley stake keys so that you can redeem your rewards on mainnet.
You need your keys from the ITN: owner.prv and owner.pub . Use cardano-cli 1.1.9.0 or later to convert your keys:
Convert the signing key (owner.prv):
cardano-cli key convert-itn-extended-key \
--itn-signing-key-file owner.prv \
--out-file itn-stake.skey
Convert the verification key (owner.pub):
cardano-cli key convert-itn-key \
--itn-verification-key-file owner.pub \
--out-file itn-stake.vkey
Build your itn-stake.addr
cardano-cli stake-address build \
--mainnet \
--stake-verification-key-file itn-stake.vkey \
--out-file itn-stake.addr
Withdraw rewards to your payment address as shown in Withdrawing rewards