nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqwamvxt2tr50ghu4fdw47ksadnt0p277nv0vfhplmv0n0z3243zyqkmdjma nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqsatan3ugmhaq9wgs26tp4gdua5gslfaazut27f2qclgp82knxljsmmake6 the keys are the same length however, my understanding is that it is extremely dangerous to use the same key data in two different ways.
An easy way around this is, just create a new Nostr event that uses your regular nostr key to sign a message indicating a cryptographic proof of your ethereum key. then you just have two separate keys but they are provably linked