You were totally right
Thanks a lot. The 3rd string was the private key as exported my multibit.
I have been able to import it, though I cannot currently do anything, it is syncing. That raises some questions:
- Will Multibit be able to sync given is 3 years old?
Yes. It should be able to.
However, MultiBit is no longer being actively developed or supported. There may be some bugs or issues. You should move to some other wallet as soon as possible:
https://multibit.org/blog/2017/07/26/multibit-shutdown.html- Will I be able to use my money from there?
Yes. You should be able to.
However, see my note above about moving to some other wallet as soon as possible.
- Can I somehow import my multibit private key in Bitcoin Core?
Yes. It should be possible to convert the base64 private key to a WIF (
Wallet
Import
Format) private key.
Also, I think MultiBit Classic provides an option to export WIF keys:
https://multibit.org/help/v0.5/help_exportingPrivateKeys.htmlHowever, it might be easier and safer to just create a transaction with your MultiBit wallet to send your entire balance to a new address in your new wallet.
Also, most new wallets (Bitcoin Core, Electrum, etc.) use are HD (
Hierarchical
Deterministic) wallets which means that all private keys and addresses are generated from a single seed value. Using such a wallet means you only need to back the seed up, and all future private keys and addresses can be regenerated from that seed value at any time if needed. Importing a private key would result in that key NOT being backed up with the seed value and would therefore complicate the process of maintaining a reliable backup.