How to migrate between the two
Bitcoin Libre uses 12 word mnemonics. Proton wallet uses 51 character private keys. It’s not difficult to go from Libre to Proton.
The test example
For the purpose of this example, we will use the test account test123123. This was generated on Libre using the following 12 words
coral shiver autumn notable place scrub window unable march panther need option
This corresponds to the account test123123 on the proton blockchain. You can verify this here: https://proton.bloks.io/account/test123123
Now, how to generate the proton private key for this example?
Step1: Use Ian Coleman’s Utility: https://iancoleman.io/bip39/
Step 2: Note the derived address
the private key is the derived address m/44'/194'/0'/0/0
Step3: Test in Anchor wallet
The reverse? Hard.
Not easy going from an EOSIO address to the 12 keywords…