I attempted utilizing mkp224o to generate a Tor vainness deal with for my Bitcoin Core node. It output one thing like this:

./mkp224o -y satosh

hostname:
satoshf47rudte4hkkhhpz7sndbizctnvh3qcmdsaegjaprobb5mt6id.onion
hs_ed25519_public_key:
PT0gZWQyNTUxOXYxLXB1YmxpYzogdHlwZTAgPT0AAACQJukcvPxoOZOHUo535/JowoyKban3ATByAQyQPi4Ieg==
hs_ed25519_secret_key:
PT0gZWQyNTUxOXYxLXNlY3JldDogdHlwZTAgPT0AAADwgEV7/yRWZksAC7dZCHRWx0GQVn7q3Wki2rEmQd1DaBtwbyaym1Ohy+572xy49hnGgJyh2eWdEaaOs/ko0nkw

I assumed I may simply edit onion_v3_private_key and put the key key in there after “ED25519-V3:”, nevertheless it did not work, and the generated key additionally appears longer than the one initially within the file. The error in debug.log was:

tor: Add onion failed; error code 512