fix: use str with trimming

program_admin/publisher_program_instructions.py

@@ -73,10 +73,15 @@ def create_buffer_account(
  space: int,
  lamports: int,
 ) -> Tuple[PublicKey, TransactionInstruction]:
- # The seed should be str but later is used in rust as
- # &str and therefore we use latin1 encoding to map byte
- # i to char i
- seed = bytes(publisher_pubkey).decode("latin-1")
+ # Since the string representation of the PublicKey is 44 bytes long (base58 encoded)
+ # and we use 32 bytes of it, the chances of collision are very low.
+ #
+ # The seed has a max length of 32 and although the publisher_pubkey is 32 bytes,
+ # it is impossible to convert it to a string with a length of 32 that the
+ # underlying library (solders) can handle. We don't know exactly why, but it
+ # seems to be related to str -> &str conversion in pyo3 that solders uses to
+ # interact with the Rust implementation of the logic.
+ seed = str(publisher_pubkey)[:32]
  new_account_pubkey = PublicKey.create_with_seed(
  base_pubkey,
  seed,