chore(core): Increase maximum CoinJoin coordinator name length to 36 (2 lines).

common/protob/messages-bitcoin.proto

@@ -558,7 +558,7 @@ message OwnershipProof {
 message AuthorizeCoinJoin {
     option (unstable) = true;
 
-    required string coordinator = 1;                                    // coordinator identifier to approve as a prefix in commitment data (max. 18 ASCII characters)
+    required string coordinator = 1;                                    // coordinator identifier to approve as a prefix in commitment data (max. 36 ASCII characters)
     required uint64 max_total_fee = 2;                                  // maximum total fees
     optional uint32 fee_per_anonymity = 3 [default=0];                  // fee per anonymity set in units of 10^-9 percent
     repeated uint32 address_n = 4;                                      // prefix of the BIP-32 path leading to the account (m / purpose' / coin_type' / account')

core/src/apps/bitcoin/authorize_coinjoin.py

@@ -1,7 +1,7 @@
 from micropython import const
 from typing import TYPE_CHECKING
 
-from trezor import ui
+from trezor import ui, wire
 from trezor.messages import AuthorizeCoinJoin, Success
 from trezor.strings import format_amount
 from trezor.ui.layouts import confirm_action, confirm_coinjoin
@@ -15,11 +15,10 @@ from .keychain import validate_path_against_script_type, with_keychain
 from .sign_tx.layout import format_coin_amount
 
 if TYPE_CHECKING:
-    from trezor import wire
     from apps.common.coininfo import CoinInfo
     from apps.common.keychain import Keychain
 
-_MAX_COORDINATOR_LEN = const(18)
+_MAX_COORDINATOR_LEN = const(36)
 
 
 @with_keychain