Old Multibit to new Electrum [!solved!]

[JaroslavH]

Hello,

I found out I had some funds on my old wallet Multibit 0.5.18. I know it's an old unsupported version.

I found here instructions on how to transfer funds to Electrum 4.0.5. The procedure does not work for me on the new version. There are other menus, ...

Anyway, I think I have to choose Wallet / Private key / Sweep.
I have to enter the private key here. If I put it there, I still don't have a button Next available. I assume there is a problem with the key.
Can there be an old format that the new version does not support?

My key has 128 characters and is divided into two lines.

Anyone have an idea how to get out of this situation?

Sorry for my bad english.

Thank you for help.

[1715011055]

1715011055

[1715011055]

1715011055

[1715011055]

1715011055

[1715011055]

1715011055

[1715011055]

1715011055

[ranochigo]

Does your private key start with a 5, K or L? WIF private keys are not 128 characters long, wallet import format keys should be 51 or 52 characters max.

How did you extract your private key? Did you get it from a file with an extension of .key and did you open the file to copy the private keys out?

[JaroslavH]

Yes, I'm opening a file with a .key extension. First char is U :-(
I open in a text editor. It is bad?

Multibit: Tools / Export Private keys

[ranochigo]

Yes, I'm opening a file with a .key extension. First char is U :-(
I open in a text editor. It is bad?

Multibit: Tools / Export Private keys

Did you encrypt it? File has to be unencrypted. I'm 100% certain that's not the private key you're looking for.

If done correctly, there should be a specific formatting that displays the private keys associated with the addresses.

Don't share with anyone the file or it's content.

[NeuroticFish]

Indeed, normally the key file contains on the relevant lines pairs like:
private_key white_space key_creation_date
...and the key starts with K or L.

But Multibit used to also have the option to export the key encrypted and I don't remember the format for that. Maybe that's the case here.



OP, is there any chance you'd remember if you exported the key with password protection and maybe you remember the password too?
I'd suggest that after a backup of those files you'd install the old Multibit, import the key then export it without password protection. Then you'll be able to import into Electrum.

[JaroslavH]

You're right. It was encrypted. Text editor me didn't offer to enter my password. So I did the export without a password and everything works.

Thanks for the advice