xmr: sign protocol - multisig logic removed

src/apps/monero/protocol/signing/step_09_sign_input.py

@@ -176,14 +176,6 @@ async def sign_input(
     gc.collect()
     state.mem_trace(6)
 
-    # Multisig values returned encrypted, keys returned after finished successfully.
-    if state.multi_sig:
-        from apps.monero.xmr.enc import chacha_poly
-
-        cout = chacha_poly.encrypt_pack(
-            hmac_encryption_keys.enc_key_cout(state.key_enc), crypto.encodeint(msc)
-        )
-
     # Final state transition
     if state.inp_idx + 1 == state.input_count:
         # state.state.set_signature_done()  todo remove?

src/apps/monero/protocol/signing/step_10_sign_final.py

@@ -20,10 +20,6 @@ async def final_msg(state: State):
     # state.state.set_final() todo needed?
     print("10")
 
-    cout_key = (
-        hmac_encryption_keys.enc_key_cout(state.key_enc) if state.multi_sig else None
-    )
-
     # Encrypted tx keys under transaction specific key, derived from txhash and spend key.
     # Deterministic transaction key, so we can recover it just from transaction and the spend key.
     tx_key, salt, rand_mult = misc.compute_tx_key(
@@ -39,5 +35,5 @@ async def final_msg(state: State):
     gc.collect()
 
     return MoneroTransactionFinalAck(
-        cout_key=cout_key, salt=salt, rand_mult=rand_mult, tx_enc_keys=tx_enc_keys
+        cout_key=None, salt=salt, rand_mult=rand_mult, tx_enc_keys=tx_enc_keys
     )