@roman-kashitsyn This looks like some legacy stuff from back when canisters couldn’t hold ICP.
Actually…now that I look at it, this may be an old implementation from back before the new textual encoding was being discussed.
I think the actual encoding is more like:
//note: does not consider crc check on the blob bytes
account_icrc1_text = Principal.toText(Principal.fromActor(this)) # ":" # Conversion.valueToText(#Bytes(#frozen(hash)));
Decoding should be pretty straight forward if you just split on “:” and use something like GitHub - aviate-labs/encoding.mo: Encoding Package for Motoko to decode the second part.
See ICRC-1 Account Human Readable Format - #42 by lastmjs
and Announcing "Token Standard" as topic of the first meeting of the Ledger & Tokenization Working Group - #53 by Maxfinity
We do really need to tie down the final format. I think we’re very close and if you go with principal:bytesinhexwithtruncated0s I think you’ll be ok. If it is intercanister you can ignore the CRC check anyway as no one will be copy/pasting it.