chore: regenerate protobuf classes

core/src/trezor/messages/BinanceAddress.py

@@ -16,12 +16,12 @@ class BinanceAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/BinancePublicKey.py

@@ -16,12 +16,12 @@ class BinancePublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
     ) -> None:
         self.public_key = public_key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/BinanceSignedTx.py

@@ -16,8 +16,8 @@ class BinanceSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
-        public_key: bytes = None,
+        public_key: bytes,
     ) -> None:
         self.signature = signature
         self.public_key = public_key
@@ -25,6 +25,6 @@ class BinanceSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.BytesType, None),
+            1: ('signature', p.BytesType, p.FLAG_REQUIRED),
-            2: ('public_key', p.BytesType, None),
+            2: ('public_key', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/CardanoAddress.py

@@ -16,12 +16,12 @@ class CardanoAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/CardanoAddressParametersType.py

@@ -18,9 +18,9 @@ class CardanoAddressParametersType(p.MessageType):
     def __init__(
         self,
         *,
+        address_type: EnumTypeCardanoAddressType,
         address_n: List[int] = None,
         address_n_staking: List[int] = None,
-        address_type: EnumTypeCardanoAddressType = None,
         staking_key_hash: bytes = None,
         certificate_pointer: CardanoBlockchainPointerType = None,
     ) -> None:
@@ -33,7 +33,7 @@ class CardanoAddressParametersType(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address_type', p.EnumType("CardanoAddressType", (0, 1, 2, 3, 4, 5, 6, 7, 8, 14, 15)), None),
+            1: ('address_type', p.EnumType("CardanoAddressType", (0, 1, 2, 3, 4, 5, 6, 7, 8, 14, 15)), p.FLAG_REQUIRED),
             2: ('address_n', p.UVarintType, p.FLAG_REPEATED),
             3: ('address_n_staking', p.UVarintType, p.FLAG_REPEATED),
             4: ('staking_key_hash', p.BytesType, None),

core/src/trezor/messages/CardanoBlockchainPointerType.py

@@ -15,9 +15,9 @@ class CardanoBlockchainPointerType(p.MessageType):
     def __init__(
         self,
         *,
-        block_index: int = None,
+        block_index: int,
-        tx_index: int = None,
+        tx_index: int,
-        certificate_index: int = None,
+        certificate_index: int,
     ) -> None:
         self.block_index = block_index
         self.tx_index = tx_index
@@ -26,7 +26,7 @@ class CardanoBlockchainPointerType(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('block_index', p.UVarintType, None),
+            1: ('block_index', p.UVarintType, p.FLAG_REQUIRED),
-            2: ('tx_index', p.UVarintType, None),
+            2: ('tx_index', p.UVarintType, p.FLAG_REQUIRED),
-            3: ('certificate_index', p.UVarintType, None),
+            3: ('certificate_index', p.UVarintType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/CardanoGetAddress.py

@@ -18,21 +18,21 @@ class CardanoGetAddress(p.MessageType):
     def __init__(
         self,
         *,
-        show_display: bool = None,
+        protocol_magic: int,
-        protocol_magic: int = None,
+        network_id: int,
-        network_id: int = None,
+        address_parameters: CardanoAddressParametersType,
-        address_parameters: CardanoAddressParametersType = None,
+        show_display: bool = False,
     ) -> None:
-        self.show_display = show_display
         self.protocol_magic = protocol_magic
         self.network_id = network_id
         self.address_parameters = address_parameters
+        self.show_display = show_display
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            2: ('show_display', p.BoolType, None),
+            2: ('show_display', p.BoolType, False),  # default=false
-            3: ('protocol_magic', p.UVarintType, None),
+            3: ('protocol_magic', p.UVarintType, p.FLAG_REQUIRED),
-            4: ('network_id', p.UVarintType, None),
+            4: ('network_id', p.UVarintType, p.FLAG_REQUIRED),
-            5: ('address_parameters', CardanoAddressParametersType, None),
+            5: ('address_parameters', CardanoAddressParametersType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/CardanoPublicKey.py

@@ -18,8 +18,8 @@ class CardanoPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        xpub: str = None,
+        xpub: str,
-        node: HDNodeType = None,
+        node: HDNodeType,
     ) -> None:
         self.xpub = xpub
         self.node = node
@@ -27,6 +27,6 @@ class CardanoPublicKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('xpub', p.UnicodeType, None),
+            1: ('xpub', p.UnicodeType, p.FLAG_REQUIRED),
-            2: ('node', HDNodeType, None),
+            2: ('node', HDNodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/CardanoSignTx.py

@@ -21,14 +21,14 @@ class CardanoSignTx(p.MessageType):
     def __init__(
         self,
         *,
+        protocol_magic: int,
+        fee: int,
+        network_id: int,
         inputs: List[CardanoTxInputType] = None,
         outputs: List[CardanoTxOutputType] = None,
         certificates: List[CardanoTxCertificateType] = None,
         withdrawals: List[CardanoTxWithdrawalType] = None,
-        protocol_magic: int = None,
-        fee: int = None,
         ttl: int = None,
-        network_id: int = None,
         metadata: bytes = None,
         validity_interval_start: int = None,
     ) -> None:
@@ -38,8 +38,8 @@ class CardanoSignTx(p.MessageType):
         self.withdrawals = withdrawals if withdrawals is not None else []
         self.protocol_magic = protocol_magic
         self.fee = fee
-        self.ttl = ttl
         self.network_id = network_id
+        self.ttl = ttl
         self.metadata = metadata
         self.validity_interval_start = validity_interval_start
 
@@ -48,10 +48,10 @@ class CardanoSignTx(p.MessageType):
         return {
             1: ('inputs', CardanoTxInputType, p.FLAG_REPEATED),
             2: ('outputs', CardanoTxOutputType, p.FLAG_REPEATED),
-            5: ('protocol_magic', p.UVarintType, None),
+            5: ('protocol_magic', p.UVarintType, p.FLAG_REQUIRED),
-            6: ('fee', p.UVarintType, None),
+            6: ('fee', p.UVarintType, p.FLAG_REQUIRED),
             7: ('ttl', p.UVarintType, None),
-            8: ('network_id', p.UVarintType, None),
+            8: ('network_id', p.UVarintType, p.FLAG_REQUIRED),
             9: ('certificates', CardanoTxCertificateType, p.FLAG_REPEATED),
             10: ('withdrawals', CardanoTxWithdrawalType, p.FLAG_REPEATED),
             11: ('metadata', p.BytesType, None),

core/src/trezor/messages/CardanoSignedTx.py

@@ -16,8 +16,8 @@ class CardanoSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        tx_hash: bytes = None,
+        tx_hash: bytes,
-        serialized_tx: bytes = None,
+        serialized_tx: bytes,
     ) -> None:
         self.tx_hash = tx_hash
         self.serialized_tx = serialized_tx
@@ -25,6 +25,6 @@ class CardanoSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('tx_hash', p.BytesType, None),
+            1: ('tx_hash', p.BytesType, p.FLAG_REQUIRED),
-            2: ('serialized_tx', p.BytesType, None),
+            2: ('serialized_tx', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/CardanoTxCertificateType.py

@@ -18,8 +18,8 @@ class CardanoTxCertificateType(p.MessageType):
     def __init__(
         self,
         *,
+        type: EnumTypeCardanoCertificateType,
         path: List[int] = None,
-        type: EnumTypeCardanoCertificateType = None,
         pool: bytes = None,
         pool_parameters: CardanoPoolParametersType = None,
     ) -> None:
@@ -31,7 +31,7 @@ class CardanoTxCertificateType(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('type', p.EnumType("CardanoCertificateType", (0, 1, 2, 3)), None),
+            1: ('type', p.EnumType("CardanoCertificateType", (0, 1, 2, 3)), p.FLAG_REQUIRED),
             2: ('path', p.UVarintType, p.FLAG_REPEATED),
             3: ('pool', p.BytesType, None),
             4: ('pool_parameters', CardanoPoolParametersType, None),

core/src/trezor/messages/CardanoTxInputType.py

@@ -15,9 +15,9 @@ class CardanoTxInputType(p.MessageType):
     def __init__(
         self,
         *,
+        prev_hash: bytes,
+        prev_index: int,
         address_n: List[int] = None,
-        prev_hash: bytes = None,
-        prev_index: int = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
         self.prev_hash = prev_hash
@@ -27,6 +27,6 @@ class CardanoTxInputType(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('prev_hash', p.BytesType, None),
+            2: ('prev_hash', p.BytesType, p.FLAG_REQUIRED),
-            3: ('prev_index', p.UVarintType, None),
+            3: ('prev_index', p.UVarintType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/CardanoTxOutputType.py

@@ -18,21 +18,21 @@ class CardanoTxOutputType(p.MessageType):
     def __init__(
         self,
         *,
+        amount: int,
         token_bundle: List[CardanoAssetGroupType] = None,
         address: str = None,
-        amount: int = None,
         address_parameters: CardanoAddressParametersType = None,
     ) -> None:
         self.token_bundle = token_bundle if token_bundle is not None else []
-        self.address = address
         self.amount = amount
+        self.address = address
         self.address_parameters = address_parameters
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
             1: ('address', p.UnicodeType, None),
-            3: ('amount', p.UVarintType, None),
+            3: ('amount', p.UVarintType, p.FLAG_REQUIRED),
             4: ('address_parameters', CardanoAddressParametersType, None),
             5: ('token_bundle', CardanoAssetGroupType, p.FLAG_REPEATED),
         }

core/src/trezor/messages/CardanoTxWithdrawalType.py

@@ -15,8 +15,8 @@ class CardanoTxWithdrawalType(p.MessageType):
     def __init__(
         self,
         *,
+        amount: int,
         path: List[int] = None,
-        amount: int = None,
     ) -> None:
         self.path = path if path is not None else []
         self.amount = amount
@@ -25,5 +25,5 @@ class CardanoTxWithdrawalType(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('path', p.UVarintType, p.FLAG_REPEATED),
-            2: ('amount', p.UVarintType, None),
+            2: ('amount', p.UVarintType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/CipherKeyValue.py

@@ -16,9 +16,9 @@ class CipherKeyValue(p.MessageType):
     def __init__(
         self,
         *,
+        key: str,
+        value: bytes,
         address_n: List[int] = None,
-        key: str = None,
-        value: bytes = None,
         encrypt: bool = None,
         ask_on_encrypt: bool = None,
         ask_on_decrypt: bool = None,
@@ -36,8 +36,8 @@ class CipherKeyValue(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('key', p.UnicodeType, None),
+            2: ('key', p.UnicodeType, p.FLAG_REQUIRED),
-            3: ('value', p.BytesType, None),
+            3: ('value', p.BytesType, p.FLAG_REQUIRED),
             4: ('encrypt', p.BoolType, None),
             5: ('ask_on_encrypt', p.BoolType, None),
             6: ('ask_on_decrypt', p.BoolType, None),

core/src/trezor/messages/CipheredKeyValue.py

@@ -16,12 +16,12 @@ class CipheredKeyValue(p.MessageType):
     def __init__(
         self,
         *,
-        value: bytes = None,
+        value: bytes,
     ) -> None:
         self.value = value
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('value', p.BytesType, None),
+            1: ('value', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/ECDHSessionKey.py

@@ -16,12 +16,12 @@ class ECDHSessionKey(p.MessageType):
     def __init__(
         self,
         *,
-        session_key: bytes = None,
+        session_key: bytes,
     ) -> None:
         self.session_key = session_key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('session_key', p.BytesType, None),
+            1: ('session_key', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/EosActionUnknown.py

@@ -15,7 +15,7 @@ class EosActionUnknown(p.MessageType):
     def __init__(
         self,
         *,
-        data_size: int = None,
+        data_size: int,
         data_chunk: bytes = None,
     ) -> None:
         self.data_size = data_size
@@ -24,6 +24,6 @@ class EosActionUnknown(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('data_size', p.UVarintType, None),
+            1: ('data_size', p.UVarintType, p.FLAG_REQUIRED),
             2: ('data_chunk', p.BytesType, None),
         }

core/src/trezor/messages/EosAuthorizationKey.py

@@ -15,21 +15,21 @@ class EosAuthorizationKey(p.MessageType):
     def __init__(
         self,
         *,
+        type: int,
+        weight: int,
         address_n: List[int] = None,
-        type: int = None,
         key: bytes = None,
-        weight: int = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
         self.type = type
-        self.key = key
         self.weight = weight
+        self.key = key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('type', p.UVarintType, None),
+            1: ('type', p.UVarintType, p.FLAG_REQUIRED),
             2: ('key', p.BytesType, None),
             3: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            4: ('weight', p.UVarintType, None),
+            4: ('weight', p.UVarintType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/EosPublicKey.py

@@ -16,8 +16,8 @@ class EosPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        wif_public_key: str = None,
+        wif_public_key: str,
-        raw_public_key: bytes = None,
+        raw_public_key: bytes,
     ) -> None:
         self.wif_public_key = wif_public_key
         self.raw_public_key = raw_public_key
@@ -25,6 +25,6 @@ class EosPublicKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('wif_public_key', p.UnicodeType, None),
+            1: ('wif_public_key', p.UnicodeType, p.FLAG_REQUIRED),
-            2: ('raw_public_key', p.BytesType, None),
+            2: ('raw_public_key', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/EosSignedTx.py

@@ -16,12 +16,12 @@ class EosSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: str = None,
+        signature: str,
     ) -> None:
         self.signature = signature
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.UnicodeType, None),
+            1: ('signature', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/EthereumMessageSignature.py

@@ -16,8 +16,8 @@ class EthereumMessageSignature(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
-        address: str = None,
+        address: str,
     ) -> None:
         self.signature = signature
         self.address = address
@@ -25,6 +25,6 @@ class EthereumMessageSignature(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
-            3: ('address', p.UnicodeType, None),
+            3: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/EthereumPublicKey.py

@@ -18,8 +18,8 @@ class EthereumPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        node: HDNodeType = None,
+        node: HDNodeType,
-        xpub: str = None,
+        xpub: str,
     ) -> None:
         self.node = node
         self.xpub = xpub
@@ -27,6 +27,6 @@ class EthereumPublicKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('node', HDNodeType, None),
+            1: ('node', HDNodeType, p.FLAG_REQUIRED),
-            2: ('xpub', p.UnicodeType, None),
+            2: ('xpub', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/Features.py

@@ -19,11 +19,11 @@ class Features(p.MessageType):
     def __init__(
         self,
         *,
+        major_version: int,
+        minor_version: int,
+        patch_version: int,
         capabilities: List[EnumTypeCapability] = None,
         vendor: str = None,
-        major_version: int = None,
-        minor_version: int = None,
-        patch_version: int = None,
         bootloader_mode: bool = None,
         device_id: str = None,
         pin_protection: bool = None,
@@ -59,10 +59,10 @@ class Features(p.MessageType):
         experimental_features: bool = None,
     ) -> None:
         self.capabilities = capabilities if capabilities is not None else []
-        self.vendor = vendor
         self.major_version = major_version
         self.minor_version = minor_version
         self.patch_version = patch_version
+        self.vendor = vendor
         self.bootloader_mode = bootloader_mode
         self.device_id = device_id
         self.pin_protection = pin_protection
@@ -101,9 +101,9 @@ class Features(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('vendor', p.UnicodeType, None),
-            2: ('major_version', p.UVarintType, None),
+            2: ('major_version', p.UVarintType, p.FLAG_REQUIRED),
-            3: ('minor_version', p.UVarintType, None),
+            3: ('minor_version', p.UVarintType, p.FLAG_REQUIRED),
-            4: ('patch_version', p.UVarintType, None),
+            4: ('patch_version', p.UVarintType, p.FLAG_REQUIRED),
             5: ('bootloader_mode', p.BoolType, None),
             6: ('device_id', p.UnicodeType, None),
             7: ('pin_protection', p.BoolType, None),

core/src/trezor/messages/GetECDHSessionKey.py

@@ -18,8 +18,8 @@ class GetECDHSessionKey(p.MessageType):
     def __init__(
         self,
         *,
-        identity: IdentityType = None,
+        identity: IdentityType,
-        peer_public_key: bytes = None,
+        peer_public_key: bytes,
         ecdsa_curve_name: str = None,
     ) -> None:
         self.identity = identity
@@ -29,7 +29,7 @@ class GetECDHSessionKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('identity', IdentityType, None),
+            1: ('identity', IdentityType, p.FLAG_REQUIRED),
-            2: ('peer_public_key', p.BytesType, None),
+            2: ('peer_public_key', p.BytesType, p.FLAG_REQUIRED),
             3: ('ecdsa_curve_name', p.UnicodeType, None),
         }

core/src/trezor/messages/LiskAddress.py

@@ -16,12 +16,12 @@ class LiskAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/LiskMessageSignature.py

@@ -16,8 +16,8 @@ class LiskMessageSignature(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.public_key = public_key
         self.signature = signature
@@ -25,6 +25,6 @@ class LiskMessageSignature(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/LiskPublicKey.py

@@ -16,12 +16,12 @@ class LiskPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
     ) -> None:
         self.public_key = public_key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/LiskSignMessage.py

@@ -16,8 +16,8 @@ class LiskSignMessage(p.MessageType):
     def __init__(
         self,
         *,
+        message: bytes,
         address_n: List[int] = None,
-        message: bytes = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
         self.message = message
@@ -26,5 +26,5 @@ class LiskSignMessage(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('message', p.BytesType, None),
+            2: ('message', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/LiskSignTx.py

@@ -18,8 +18,8 @@ class LiskSignTx(p.MessageType):
     def __init__(
         self,
         *,
+        transaction: LiskTransactionCommon,
         address_n: List[int] = None,
-        transaction: LiskTransactionCommon = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
         self.transaction = transaction
@@ -28,5 +28,5 @@ class LiskSignTx(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('transaction', LiskTransactionCommon, None),
+            2: ('transaction', LiskTransactionCommon, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/LiskSignedTx.py

@@ -16,12 +16,12 @@ class LiskSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.signature = signature
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.BytesType, None),
+            1: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/LiskVerifyMessage.py

@@ -16,9 +16,9 @@ class LiskVerifyMessage(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
-        signature: bytes = None,
+        signature: bytes,
-        message: bytes = None,
+        message: bytes,
     ) -> None:
         self.public_key = public_key
         self.signature = signature
@@ -27,7 +27,7 @@ class LiskVerifyMessage(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
-            3: ('message', p.BytesType, None),
+            3: ('message', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/MessageSignature.py

@@ -16,8 +16,8 @@ class MessageSignature(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.address = address
         self.signature = signature
@@ -25,6 +25,6 @@ class MessageSignature(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/NEMSignedTx.py

@@ -16,8 +16,8 @@ class NEMSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        data: bytes = None,
+        data: bytes,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.data = data
         self.signature = signature
@@ -25,6 +25,6 @@ class NEMSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('data', p.BytesType, None),
+            1: ('data', p.BytesType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/Ping.py

@@ -16,7 +16,7 @@ class Ping(p.MessageType):
     def __init__(
         self,
         *,
-        message: str = None,
+        message: str = "",
         button_protection: bool = None,
     ) -> None:
         self.message = message
@@ -25,6 +25,6 @@ class Ping(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('message', p.UnicodeType, None),
+            1: ('message', p.UnicodeType, ""),  # default=
             2: ('button_protection', p.BoolType, None),
         }

core/src/trezor/messages/PublicKey.py

@@ -18,8 +18,8 @@ class PublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        node: HDNodeType = None,
+        node: HDNodeType,
-        xpub: str = None,
+        xpub: str,
         root_fingerprint: int = None,
     ) -> None:
         self.node = node
@@ -29,7 +29,7 @@ class PublicKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('node', HDNodeType, None),
+            1: ('node', HDNodeType, p.FLAG_REQUIRED),
-            2: ('xpub', p.UnicodeType, None),
+            2: ('xpub', p.UnicodeType, p.FLAG_REQUIRED),
             3: ('root_fingerprint', p.UVarintType, None),
         }

core/src/trezor/messages/RippleAddress.py

@@ -16,12 +16,12 @@ class RippleAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/RipplePayment.py

@@ -15,8 +15,8 @@ class RipplePayment(p.MessageType):
     def __init__(
         self,
         *,
-        amount: int = None,
+        amount: int,
-        destination: str = None,
+        destination: str,
         destination_tag: int = None,
     ) -> None:
         self.amount = amount
@@ -26,7 +26,7 @@ class RipplePayment(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('amount', p.UVarintType, None),
+            1: ('amount', p.UVarintType, p.FLAG_REQUIRED),
-            2: ('destination', p.UnicodeType, None),
+            2: ('destination', p.UnicodeType, p.FLAG_REQUIRED),
             3: ('destination_tag', p.UVarintType, None),
         }

core/src/trezor/messages/RippleSignedTx.py

@@ -16,8 +16,8 @@ class RippleSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
-        serialized_tx: bytes = None,
+        serialized_tx: bytes,
     ) -> None:
         self.signature = signature
         self.serialized_tx = serialized_tx
@@ -25,6 +25,6 @@ class RippleSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.BytesType, None),
+            1: ('signature', p.BytesType, p.FLAG_REQUIRED),
-            2: ('serialized_tx', p.BytesType, None),
+            2: ('serialized_tx', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/SignIdentity.py

@@ -18,9 +18,9 @@ class SignIdentity(p.MessageType):
     def __init__(
         self,
         *,
-        identity: IdentityType = None,
+        identity: IdentityType,
-        challenge_hidden: bytes = None,
+        challenge_hidden: bytes = b"",
-        challenge_visual: str = None,
+        challenge_visual: str = "",
         ecdsa_curve_name: str = None,
     ) -> None:
         self.identity = identity
@@ -31,8 +31,8 @@ class SignIdentity(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('identity', IdentityType, None),
+            1: ('identity', IdentityType, p.FLAG_REQUIRED),
-            2: ('challenge_hidden', p.BytesType, None),
+            2: ('challenge_hidden', p.BytesType, b""),  # default=
-            3: ('challenge_visual', p.UnicodeType, None),
+            3: ('challenge_visual', p.UnicodeType, ""),  # default=
             4: ('ecdsa_curve_name', p.UnicodeType, None),
         }

core/src/trezor/messages/SignedIdentity.py

@@ -16,18 +16,18 @@ class SignedIdentity(p.MessageType):
     def __init__(
         self,
         *,
+        public_key: bytes,
+        signature: bytes,
         address: str = None,
-        public_key: bytes = None,
-        signature: bytes = None,
     ) -> None:
-        self.address = address
         self.public_key = public_key
         self.signature = signature
+        self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
             1: ('address', p.UnicodeType, None),
-            2: ('public_key', p.BytesType, None),
+            2: ('public_key', p.BytesType, p.FLAG_REQUIRED),
-            3: ('signature', p.BytesType, None),
+            3: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/StellarAddress.py

@@ -16,12 +16,12 @@ class StellarAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/StellarAssetType.py

@@ -15,7 +15,7 @@ class StellarAssetType(p.MessageType):
     def __init__(
         self,
         *,
-        type: int = None,
+        type: int,
         code: str = None,
         issuer: str = None,
     ) -> None:
@@ -26,7 +26,7 @@ class StellarAssetType(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('type', p.UVarintType, None),
+            1: ('type', p.UVarintType, p.FLAG_REQUIRED),
             2: ('code', p.UnicodeType, None),
             3: ('issuer', p.UnicodeType, None),
         }

core/src/trezor/messages/StellarSignedTx.py

@@ -16,8 +16,8 @@ class StellarSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.public_key = public_key
         self.signature = signature
@@ -25,6 +25,6 @@ class StellarSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/Success.py

@@ -16,12 +16,12 @@ class Success(p.MessageType):
     def __init__(
         self,
         *,
-        message: str = None,
+        message: str = "",
     ) -> None:
         self.message = message
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('message', p.UnicodeType, None),
+            1: ('message', p.UnicodeType, ""),  # default=
         }

core/src/trezor/messages/TezosAddress.py

@@ -16,12 +16,12 @@ class TezosAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/TezosContractID.py

@@ -16,8 +16,8 @@ class TezosContractID(p.MessageType):
     def __init__(
         self,
         *,
-        tag: EnumTypeTezosContractType = None,
+        tag: EnumTypeTezosContractType,
-        hash: bytes = None,
+        hash: bytes,
     ) -> None:
         self.tag = tag
         self.hash = hash
@@ -25,6 +25,6 @@ class TezosContractID(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('tag', p.EnumType("TezosContractType", (0, 1)), None),
+            1: ('tag', p.EnumType("TezosContractType", (0, 1)), p.FLAG_REQUIRED),
-            2: ('hash', p.BytesType, None),
+            2: ('hash', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/TezosDelegationOp.py

@@ -15,12 +15,12 @@ class TezosDelegationOp(p.MessageType):
     def __init__(
         self,
         *,
-        source: bytes = None,
+        source: bytes,
-        fee: int = None,
+        fee: int,
-        counter: int = None,
+        counter: int,
-        gas_limit: int = None,
+        gas_limit: int,
-        storage_limit: int = None,
+        storage_limit: int,
-        delegate: bytes = None,
+        delegate: bytes,
     ) -> None:
         self.source = source
         self.fee = fee
@@ -32,10 +32,10 @@ class TezosDelegationOp(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            7: ('source', p.BytesType, None),
+            7: ('source', p.BytesType, p.FLAG_REQUIRED),
-            2: ('fee', p.UVarintType, None),
+            2: ('fee', p.UVarintType, p.FLAG_REQUIRED),
-            3: ('counter', p.UVarintType, None),
+            3: ('counter', p.UVarintType, p.FLAG_REQUIRED),
-            4: ('gas_limit', p.UVarintType, None),
+            4: ('gas_limit', p.UVarintType, p.FLAG_REQUIRED),
-            5: ('storage_limit', p.UVarintType, None),
+            5: ('storage_limit', p.UVarintType, p.FLAG_REQUIRED),
-            6: ('delegate', p.BytesType, None),
+            6: ('delegate', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/TezosOriginationOp.py

@@ -15,42 +15,42 @@ class TezosOriginationOp(p.MessageType):
     def __init__(
         self,
         *,
-        source: bytes = None,
+        source: bytes,
-        fee: int = None,
+        fee: int,
-        counter: int = None,
+        counter: int,
-        gas_limit: int = None,
+        gas_limit: int,
-        storage_limit: int = None,
+        storage_limit: int,
+        balance: int,
+        script: bytes,
         manager_pubkey: bytes = None,
-        balance: int = None,
         spendable: bool = None,
         delegatable: bool = None,
         delegate: bytes = None,
-        script: bytes = None,
     ) -> None:
         self.source = source
         self.fee = fee
         self.counter = counter
         self.gas_limit = gas_limit
         self.storage_limit = storage_limit
-        self.manager_pubkey = manager_pubkey
         self.balance = balance
+        self.script = script
+        self.manager_pubkey = manager_pubkey
         self.spendable = spendable
         self.delegatable = delegatable
         self.delegate = delegate
-        self.script = script
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            12: ('source', p.BytesType, None),
+            12: ('source', p.BytesType, p.FLAG_REQUIRED),
-            2: ('fee', p.UVarintType, None),
+            2: ('fee', p.UVarintType, p.FLAG_REQUIRED),
-            3: ('counter', p.UVarintType, None),
+            3: ('counter', p.UVarintType, p.FLAG_REQUIRED),
-            4: ('gas_limit', p.UVarintType, None),
+            4: ('gas_limit', p.UVarintType, p.FLAG_REQUIRED),
-            5: ('storage_limit', p.UVarintType, None),
+            5: ('storage_limit', p.UVarintType, p.FLAG_REQUIRED),
             6: ('manager_pubkey', p.BytesType, None),
-            7: ('balance', p.UVarintType, None),
+            7: ('balance', p.UVarintType, p.FLAG_REQUIRED),
             8: ('spendable', p.BoolType, None),
             9: ('delegatable', p.BoolType, None),
             10: ('delegate', p.BytesType, None),
-            11: ('script', p.BytesType, None),
+            11: ('script', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/TezosPublicKey.py

@@ -16,12 +16,12 @@ class TezosPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: str = None,
+        public_key: str,
     ) -> None:
         self.public_key = public_key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.UnicodeType, None),
+            1: ('public_key', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/TezosRevealOp.py

@@ -15,12 +15,12 @@ class TezosRevealOp(p.MessageType):
     def __init__(
         self,
         *,
-        source: bytes = None,
+        source: bytes,
-        fee: int = None,
+        fee: int,
-        counter: int = None,
+        counter: int,
-        gas_limit: int = None,
+        gas_limit: int,
-        storage_limit: int = None,
+        storage_limit: int,
-        public_key: bytes = None,
+        public_key: bytes,
     ) -> None:
         self.source = source
         self.fee = fee
@@ -32,10 +32,10 @@ class TezosRevealOp(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            7: ('source', p.BytesType, None),
+            7: ('source', p.BytesType, p.FLAG_REQUIRED),
-            2: ('fee', p.UVarintType, None),
+            2: ('fee', p.UVarintType, p.FLAG_REQUIRED),
-            3: ('counter', p.UVarintType, None),
+            3: ('counter', p.UVarintType, p.FLAG_REQUIRED),
-            4: ('gas_limit', p.UVarintType, None),
+            4: ('gas_limit', p.UVarintType, p.FLAG_REQUIRED),
-            5: ('storage_limit', p.UVarintType, None),
+            5: ('storage_limit', p.UVarintType, p.FLAG_REQUIRED),
-            6: ('public_key', p.BytesType, None),
+            6: ('public_key', p.BytesType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/TezosSignTx.py

@@ -23,8 +23,8 @@ class TezosSignTx(p.MessageType):
     def __init__(
         self,
         *,
+        branch: bytes,
         address_n: List[int] = None,
-        branch: bytes = None,
         reveal: TezosRevealOp = None,
         transaction: TezosTransactionOp = None,
         origination: TezosOriginationOp = None,
@@ -45,7 +45,7 @@ class TezosSignTx(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('branch', p.BytesType, None),
+            2: ('branch', p.BytesType, p.FLAG_REQUIRED),
             3: ('reveal', TezosRevealOp, None),
             4: ('transaction', TezosTransactionOp, None),
             5: ('origination', TezosOriginationOp, None),

core/src/trezor/messages/TezosSignedTx.py

@@ -16,9 +16,9 @@ class TezosSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: str = None,
+        signature: str,
-        sig_op_contents: bytes = None,
+        sig_op_contents: bytes,
-        operation_hash: str = None,
+        operation_hash: str,
     ) -> None:
         self.signature = signature
         self.sig_op_contents = sig_op_contents
@@ -27,7 +27,7 @@ class TezosSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.UnicodeType, None),
+            1: ('signature', p.UnicodeType, p.FLAG_REQUIRED),
-            2: ('sig_op_contents', p.BytesType, None),
+            2: ('sig_op_contents', p.BytesType, p.FLAG_REQUIRED),
-            3: ('operation_hash', p.UnicodeType, None),
+            3: ('operation_hash', p.UnicodeType, p.FLAG_REQUIRED),
         }

core/src/trezor/messages/TezosTransactionOp.py

@@ -18,13 +18,13 @@ class TezosTransactionOp(p.MessageType):
     def __init__(
         self,
         *,
-        source: bytes = None,
+        source: bytes,
-        fee: int = None,
+        fee: int,
-        counter: int = None,
+        counter: int,
-        gas_limit: int = None,
+        gas_limit: int,
-        storage_limit: int = None,
+        storage_limit: int,
-        amount: int = None,
+        amount: int,
-        destination: TezosContractID = None,
+        destination: TezosContractID,
         parameters: bytes = None,
         parameters_manager: TezosParametersManager = None,
     ) -> None:
@@ -41,13 +41,13 @@ class TezosTransactionOp(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            9: ('source', p.BytesType, None),
+            9: ('source', p.BytesType, p.FLAG_REQUIRED),
-            2: ('fee', p.UVarintType, None),
+            2: ('fee', p.UVarintType, p.FLAG_REQUIRED),
-            3: ('counter', p.UVarintType, None),
+            3: ('counter', p.UVarintType, p.FLAG_REQUIRED),
-            4: ('gas_limit', p.UVarintType, None),
+            4: ('gas_limit', p.UVarintType, p.FLAG_REQUIRED),
-            5: ('storage_limit', p.UVarintType, None),
+            5: ('storage_limit', p.UVarintType, p.FLAG_REQUIRED),
-            6: ('amount', p.UVarintType, None),
+            6: ('amount', p.UVarintType, p.FLAG_REQUIRED),
-            7: ('destination', TezosContractID, None),
+            7: ('destination', TezosContractID, p.FLAG_REQUIRED),
             8: ('parameters', p.BytesType, None),
             10: ('parameters_manager', TezosParametersManager, None),
         }

python/src/trezorlib/messages/BinanceAddress.py

@@ -16,12 +16,12 @@ class BinanceAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/BinancePublicKey.py

@@ -16,12 +16,12 @@ class BinancePublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
     ) -> None:
         self.public_key = public_key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/BinanceSignedTx.py

@@ -16,8 +16,8 @@ class BinanceSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
-        public_key: bytes = None,
+        public_key: bytes,
     ) -> None:
         self.signature = signature
         self.public_key = public_key
@@ -25,6 +25,6 @@ class BinanceSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.BytesType, None),
+            1: ('signature', p.BytesType, p.FLAG_REQUIRED),
-            2: ('public_key', p.BytesType, None),
+            2: ('public_key', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CardanoAddress.py

@@ -16,12 +16,12 @@ class CardanoAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CardanoAddressParametersType.py

@@ -18,9 +18,9 @@ class CardanoAddressParametersType(p.MessageType):
     def __init__(
         self,
         *,
+        address_type: EnumTypeCardanoAddressType,
         address_n: List[int] = None,
         address_n_staking: List[int] = None,
-        address_type: EnumTypeCardanoAddressType = None,
         staking_key_hash: bytes = None,
         certificate_pointer: CardanoBlockchainPointerType = None,
     ) -> None:
@@ -33,7 +33,7 @@ class CardanoAddressParametersType(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address_type', p.EnumType("CardanoAddressType", (0, 1, 2, 3, 4, 5, 6, 7, 8, 14, 15)), None),
+            1: ('address_type', p.EnumType("CardanoAddressType", (0, 1, 2, 3, 4, 5, 6, 7, 8, 14, 15)), p.FLAG_REQUIRED),
             2: ('address_n', p.UVarintType, p.FLAG_REPEATED),
             3: ('address_n_staking', p.UVarintType, p.FLAG_REPEATED),
             4: ('staking_key_hash', p.BytesType, None),

python/src/trezorlib/messages/CardanoBlockchainPointerType.py

@@ -15,9 +15,9 @@ class CardanoBlockchainPointerType(p.MessageType):
     def __init__(
         self,
         *,
-        block_index: int = None,
+        block_index: int,
-        tx_index: int = None,
+        tx_index: int,
-        certificate_index: int = None,
+        certificate_index: int,
     ) -> None:
         self.block_index = block_index
         self.tx_index = tx_index
@@ -26,7 +26,7 @@ class CardanoBlockchainPointerType(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('block_index', p.UVarintType, None),
+            1: ('block_index', p.UVarintType, p.FLAG_REQUIRED),
-            2: ('tx_index', p.UVarintType, None),
+            2: ('tx_index', p.UVarintType, p.FLAG_REQUIRED),
-            3: ('certificate_index', p.UVarintType, None),
+            3: ('certificate_index', p.UVarintType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CardanoGetAddress.py

@@ -18,21 +18,21 @@ class CardanoGetAddress(p.MessageType):
     def __init__(
         self,
         *,
-        show_display: bool = None,
+        protocol_magic: int,
-        protocol_magic: int = None,
+        network_id: int,
-        network_id: int = None,
+        address_parameters: CardanoAddressParametersType,
-        address_parameters: CardanoAddressParametersType = None,
+        show_display: bool = False,
     ) -> None:
-        self.show_display = show_display
         self.protocol_magic = protocol_magic
         self.network_id = network_id
         self.address_parameters = address_parameters
+        self.show_display = show_display
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            2: ('show_display', p.BoolType, None),
+            2: ('show_display', p.BoolType, False),  # default=false
-            3: ('protocol_magic', p.UVarintType, None),
+            3: ('protocol_magic', p.UVarintType, p.FLAG_REQUIRED),
-            4: ('network_id', p.UVarintType, None),
+            4: ('network_id', p.UVarintType, p.FLAG_REQUIRED),
-            5: ('address_parameters', CardanoAddressParametersType, None),
+            5: ('address_parameters', CardanoAddressParametersType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CardanoPublicKey.py

@@ -18,8 +18,8 @@ class CardanoPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        xpub: str = None,
+        xpub: str,
-        node: HDNodeType = None,
+        node: HDNodeType,
     ) -> None:
         self.xpub = xpub
         self.node = node
@@ -27,6 +27,6 @@ class CardanoPublicKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('xpub', p.UnicodeType, None),
+            1: ('xpub', p.UnicodeType, p.FLAG_REQUIRED),
-            2: ('node', HDNodeType, None),
+            2: ('node', HDNodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CardanoSignTx.py

@@ -21,14 +21,14 @@ class CardanoSignTx(p.MessageType):
     def __init__(
         self,
         *,
+        protocol_magic: int,
+        fee: int,
+        network_id: int,
         inputs: List[CardanoTxInputType] = None,
         outputs: List[CardanoTxOutputType] = None,
         certificates: List[CardanoTxCertificateType] = None,
         withdrawals: List[CardanoTxWithdrawalType] = None,
-        protocol_magic: int = None,
-        fee: int = None,
         ttl: int = None,
-        network_id: int = None,
         metadata: bytes = None,
         validity_interval_start: int = None,
     ) -> None:
@@ -38,8 +38,8 @@ class CardanoSignTx(p.MessageType):
         self.withdrawals = withdrawals if withdrawals is not None else []
         self.protocol_magic = protocol_magic
         self.fee = fee
-        self.ttl = ttl
         self.network_id = network_id
+        self.ttl = ttl
         self.metadata = metadata
         self.validity_interval_start = validity_interval_start
 
@@ -48,10 +48,10 @@ class CardanoSignTx(p.MessageType):
         return {
             1: ('inputs', CardanoTxInputType, p.FLAG_REPEATED),
             2: ('outputs', CardanoTxOutputType, p.FLAG_REPEATED),
-            5: ('protocol_magic', p.UVarintType, None),
+            5: ('protocol_magic', p.UVarintType, p.FLAG_REQUIRED),
-            6: ('fee', p.UVarintType, None),
+            6: ('fee', p.UVarintType, p.FLAG_REQUIRED),
             7: ('ttl', p.UVarintType, None),
-            8: ('network_id', p.UVarintType, None),
+            8: ('network_id', p.UVarintType, p.FLAG_REQUIRED),
             9: ('certificates', CardanoTxCertificateType, p.FLAG_REPEATED),
             10: ('withdrawals', CardanoTxWithdrawalType, p.FLAG_REPEATED),
             11: ('metadata', p.BytesType, None),

python/src/trezorlib/messages/CardanoSignedTx.py

@@ -16,8 +16,8 @@ class CardanoSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        tx_hash: bytes = None,
+        tx_hash: bytes,
-        serialized_tx: bytes = None,
+        serialized_tx: bytes,
     ) -> None:
         self.tx_hash = tx_hash
         self.serialized_tx = serialized_tx
@@ -25,6 +25,6 @@ class CardanoSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('tx_hash', p.BytesType, None),
+            1: ('tx_hash', p.BytesType, p.FLAG_REQUIRED),
-            2: ('serialized_tx', p.BytesType, None),
+            2: ('serialized_tx', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CardanoTxCertificateType.py

@@ -18,8 +18,8 @@ class CardanoTxCertificateType(p.MessageType):
     def __init__(
         self,
         *,
+        type: EnumTypeCardanoCertificateType,
         path: List[int] = None,
-        type: EnumTypeCardanoCertificateType = None,
         pool: bytes = None,
         pool_parameters: CardanoPoolParametersType = None,
     ) -> None:
@@ -31,7 +31,7 @@ class CardanoTxCertificateType(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('type', p.EnumType("CardanoCertificateType", (0, 1, 2, 3)), None),
+            1: ('type', p.EnumType("CardanoCertificateType", (0, 1, 2, 3)), p.FLAG_REQUIRED),
             2: ('path', p.UVarintType, p.FLAG_REPEATED),
             3: ('pool', p.BytesType, None),
             4: ('pool_parameters', CardanoPoolParametersType, None),

python/src/trezorlib/messages/CardanoTxInputType.py

@@ -15,9 +15,9 @@ class CardanoTxInputType(p.MessageType):
     def __init__(
         self,
         *,
+        prev_hash: bytes,
+        prev_index: int,
         address_n: List[int] = None,
-        prev_hash: bytes = None,
-        prev_index: int = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
         self.prev_hash = prev_hash
@@ -27,6 +27,6 @@ class CardanoTxInputType(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('prev_hash', p.BytesType, None),
+            2: ('prev_hash', p.BytesType, p.FLAG_REQUIRED),
-            3: ('prev_index', p.UVarintType, None),
+            3: ('prev_index', p.UVarintType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CardanoTxOutputType.py

@@ -18,21 +18,21 @@ class CardanoTxOutputType(p.MessageType):
     def __init__(
         self,
         *,
+        amount: int,
         token_bundle: List[CardanoAssetGroupType] = None,
         address: str = None,
-        amount: int = None,
         address_parameters: CardanoAddressParametersType = None,
     ) -> None:
         self.token_bundle = token_bundle if token_bundle is not None else []
-        self.address = address
         self.amount = amount
+        self.address = address
         self.address_parameters = address_parameters
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
             1: ('address', p.UnicodeType, None),
-            3: ('amount', p.UVarintType, None),
+            3: ('amount', p.UVarintType, p.FLAG_REQUIRED),
             4: ('address_parameters', CardanoAddressParametersType, None),
             5: ('token_bundle', CardanoAssetGroupType, p.FLAG_REPEATED),
         }

python/src/trezorlib/messages/CardanoTxWithdrawalType.py

@@ -15,8 +15,8 @@ class CardanoTxWithdrawalType(p.MessageType):
     def __init__(
         self,
         *,
+        amount: int,
         path: List[int] = None,
-        amount: int = None,
     ) -> None:
         self.path = path if path is not None else []
         self.amount = amount
@@ -25,5 +25,5 @@ class CardanoTxWithdrawalType(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('path', p.UVarintType, p.FLAG_REPEATED),
-            2: ('amount', p.UVarintType, None),
+            2: ('amount', p.UVarintType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CipherKeyValue.py

@@ -16,9 +16,9 @@ class CipherKeyValue(p.MessageType):
     def __init__(
         self,
         *,
+        key: str,
+        value: bytes,
         address_n: List[int] = None,
-        key: str = None,
-        value: bytes = None,
         encrypt: bool = None,
         ask_on_encrypt: bool = None,
         ask_on_decrypt: bool = None,
@@ -36,8 +36,8 @@ class CipherKeyValue(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('key', p.UnicodeType, None),
+            2: ('key', p.UnicodeType, p.FLAG_REQUIRED),
-            3: ('value', p.BytesType, None),
+            3: ('value', p.BytesType, p.FLAG_REQUIRED),
             4: ('encrypt', p.BoolType, None),
             5: ('ask_on_encrypt', p.BoolType, None),
             6: ('ask_on_decrypt', p.BoolType, None),

python/src/trezorlib/messages/CipheredKeyValue.py

@@ -16,12 +16,12 @@ class CipheredKeyValue(p.MessageType):
     def __init__(
         self,
         *,
-        value: bytes = None,
+        value: bytes,
     ) -> None:
         self.value = value
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('value', p.BytesType, None),
+            1: ('value', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/CosiSignature.py

@@ -16,12 +16,12 @@ class CosiSignature(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.signature = signature
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.BytesType, None),
+            1: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/ECDHSessionKey.py

@@ -16,12 +16,12 @@ class ECDHSessionKey(p.MessageType):
     def __init__(
         self,
         *,
-        session_key: bytes = None,
+        session_key: bytes,
     ) -> None:
         self.session_key = session_key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('session_key', p.BytesType, None),
+            1: ('session_key', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/EosActionUnknown.py

@@ -15,7 +15,7 @@ class EosActionUnknown(p.MessageType):
     def __init__(
         self,
         *,
-        data_size: int = None,
+        data_size: int,
         data_chunk: bytes = None,
     ) -> None:
         self.data_size = data_size
@@ -24,6 +24,6 @@ class EosActionUnknown(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('data_size', p.UVarintType, None),
+            1: ('data_size', p.UVarintType, p.FLAG_REQUIRED),
             2: ('data_chunk', p.BytesType, None),
         }

python/src/trezorlib/messages/EosAuthorizationKey.py

@@ -15,21 +15,21 @@ class EosAuthorizationKey(p.MessageType):
     def __init__(
         self,
         *,
+        type: int,
+        weight: int,
         address_n: List[int] = None,
-        type: int = None,
         key: bytes = None,
-        weight: int = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
         self.type = type
-        self.key = key
         self.weight = weight
+        self.key = key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('type', p.UVarintType, None),
+            1: ('type', p.UVarintType, p.FLAG_REQUIRED),
             2: ('key', p.BytesType, None),
             3: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            4: ('weight', p.UVarintType, None),
+            4: ('weight', p.UVarintType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/EosPublicKey.py

@@ -16,8 +16,8 @@ class EosPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        wif_public_key: str = None,
+        wif_public_key: str,
-        raw_public_key: bytes = None,
+        raw_public_key: bytes,
     ) -> None:
         self.wif_public_key = wif_public_key
         self.raw_public_key = raw_public_key
@@ -25,6 +25,6 @@ class EosPublicKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('wif_public_key', p.UnicodeType, None),
+            1: ('wif_public_key', p.UnicodeType, p.FLAG_REQUIRED),
-            2: ('raw_public_key', p.BytesType, None),
+            2: ('raw_public_key', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/EosSignedTx.py

@@ -16,12 +16,12 @@ class EosSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: str = None,
+        signature: str,
     ) -> None:
         self.signature = signature
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.UnicodeType, None),
+            1: ('signature', p.UnicodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/EthereumMessageSignature.py

@@ -16,8 +16,8 @@ class EthereumMessageSignature(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
-        address: str = None,
+        address: str,
     ) -> None:
         self.signature = signature
         self.address = address
@@ -25,6 +25,6 @@ class EthereumMessageSignature(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
-            3: ('address', p.UnicodeType, None),
+            3: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/EthereumPublicKey.py

@@ -18,8 +18,8 @@ class EthereumPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        node: HDNodeType = None,
+        node: HDNodeType,
-        xpub: str = None,
+        xpub: str,
     ) -> None:
         self.node = node
         self.xpub = xpub
@@ -27,6 +27,6 @@ class EthereumPublicKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('node', HDNodeType, None),
+            1: ('node', HDNodeType, p.FLAG_REQUIRED),
-            2: ('xpub', p.UnicodeType, None),
+            2: ('xpub', p.UnicodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/Features.py

@@ -19,11 +19,11 @@ class Features(p.MessageType):
     def __init__(
         self,
         *,
+        major_version: int,
+        minor_version: int,
+        patch_version: int,
         capabilities: List[EnumTypeCapability] = None,
         vendor: str = None,
-        major_version: int = None,
-        minor_version: int = None,
-        patch_version: int = None,
         bootloader_mode: bool = None,
         device_id: str = None,
         pin_protection: bool = None,
@@ -59,10 +59,10 @@ class Features(p.MessageType):
         experimental_features: bool = None,
     ) -> None:
         self.capabilities = capabilities if capabilities is not None else []
-        self.vendor = vendor
         self.major_version = major_version
         self.minor_version = minor_version
         self.patch_version = patch_version
+        self.vendor = vendor
         self.bootloader_mode = bootloader_mode
         self.device_id = device_id
         self.pin_protection = pin_protection
@@ -101,9 +101,9 @@ class Features(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('vendor', p.UnicodeType, None),
-            2: ('major_version', p.UVarintType, None),
+            2: ('major_version', p.UVarintType, p.FLAG_REQUIRED),
-            3: ('minor_version', p.UVarintType, None),
+            3: ('minor_version', p.UVarintType, p.FLAG_REQUIRED),
-            4: ('patch_version', p.UVarintType, None),
+            4: ('patch_version', p.UVarintType, p.FLAG_REQUIRED),
             5: ('bootloader_mode', p.BoolType, None),
             6: ('device_id', p.UnicodeType, None),
             7: ('pin_protection', p.BoolType, None),

python/src/trezorlib/messages/GetECDHSessionKey.py

@@ -18,8 +18,8 @@ class GetECDHSessionKey(p.MessageType):
     def __init__(
         self,
         *,
-        identity: IdentityType = None,
+        identity: IdentityType,
-        peer_public_key: bytes = None,
+        peer_public_key: bytes,
         ecdsa_curve_name: str = None,
     ) -> None:
         self.identity = identity
@@ -29,7 +29,7 @@ class GetECDHSessionKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('identity', IdentityType, None),
+            1: ('identity', IdentityType, p.FLAG_REQUIRED),
-            2: ('peer_public_key', p.BytesType, None),
+            2: ('peer_public_key', p.BytesType, p.FLAG_REQUIRED),
             3: ('ecdsa_curve_name', p.UnicodeType, None),
         }

python/src/trezorlib/messages/LiskAddress.py

@@ -16,12 +16,12 @@ class LiskAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/LiskMessageSignature.py

@@ -16,8 +16,8 @@ class LiskMessageSignature(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.public_key = public_key
         self.signature = signature
@@ -25,6 +25,6 @@ class LiskMessageSignature(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/LiskPublicKey.py

@@ -16,12 +16,12 @@ class LiskPublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
     ) -> None:
         self.public_key = public_key
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/LiskSignMessage.py

@@ -16,8 +16,8 @@ class LiskSignMessage(p.MessageType):
     def __init__(
         self,
         *,
+        message: bytes,
         address_n: List[int] = None,
-        message: bytes = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
         self.message = message
@@ -26,5 +26,5 @@ class LiskSignMessage(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('message', p.BytesType, None),
+            2: ('message', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/LiskSignTx.py

@@ -18,8 +18,8 @@ class LiskSignTx(p.MessageType):
     def __init__(
         self,
         *,
+        transaction: LiskTransactionCommon,
         address_n: List[int] = None,
-        transaction: LiskTransactionCommon = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
         self.transaction = transaction
@@ -28,5 +28,5 @@ class LiskSignTx(p.MessageType):
     def get_fields(cls) -> Dict:
         return {
             1: ('address_n', p.UVarintType, p.FLAG_REPEATED),
-            2: ('transaction', LiskTransactionCommon, None),
+            2: ('transaction', LiskTransactionCommon, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/LiskSignedTx.py

@@ -16,12 +16,12 @@ class LiskSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.signature = signature
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.BytesType, None),
+            1: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/LiskVerifyMessage.py

@@ -16,9 +16,9 @@ class LiskVerifyMessage(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
-        signature: bytes = None,
+        signature: bytes,
-        message: bytes = None,
+        message: bytes,
     ) -> None:
         self.public_key = public_key
         self.signature = signature
@@ -27,7 +27,7 @@ class LiskVerifyMessage(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
-            3: ('message', p.BytesType, None),
+            3: ('message', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/MessageSignature.py

@@ -16,8 +16,8 @@ class MessageSignature(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.address = address
         self.signature = signature
@@ -25,6 +25,6 @@ class MessageSignature(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/NEMDecryptedMessage.py

@@ -16,12 +16,12 @@ class NEMDecryptedMessage(p.MessageType):
     def __init__(
         self,
         *,
-        payload: bytes = None,
+        payload: bytes,
     ) -> None:
         self.payload = payload
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('payload', p.BytesType, None),
+            1: ('payload', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/NEMSignedTx.py

@@ -16,8 +16,8 @@ class NEMSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        data: bytes = None,
+        data: bytes,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.data = data
         self.signature = signature
@@ -25,6 +25,6 @@ class NEMSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('data', p.BytesType, None),
+            1: ('data', p.BytesType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/Ping.py

@@ -16,7 +16,7 @@ class Ping(p.MessageType):
     def __init__(
         self,
         *,
-        message: str = None,
+        message: str = "",
         button_protection: bool = None,
     ) -> None:
         self.message = message
@@ -25,6 +25,6 @@ class Ping(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('message', p.UnicodeType, None),
+            1: ('message', p.UnicodeType, ""),  # default=
             2: ('button_protection', p.BoolType, None),
         }

python/src/trezorlib/messages/PublicKey.py

@@ -18,8 +18,8 @@ class PublicKey(p.MessageType):
     def __init__(
         self,
         *,
-        node: HDNodeType = None,
+        node: HDNodeType,
-        xpub: str = None,
+        xpub: str,
         root_fingerprint: int = None,
     ) -> None:
         self.node = node
@@ -29,7 +29,7 @@ class PublicKey(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('node', HDNodeType, None),
+            1: ('node', HDNodeType, p.FLAG_REQUIRED),
-            2: ('xpub', p.UnicodeType, None),
+            2: ('xpub', p.UnicodeType, p.FLAG_REQUIRED),
             3: ('root_fingerprint', p.UVarintType, None),
         }

python/src/trezorlib/messages/RippleAddress.py

@@ -16,12 +16,12 @@ class RippleAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/RipplePayment.py

@@ -15,8 +15,8 @@ class RipplePayment(p.MessageType):
     def __init__(
         self,
         *,
-        amount: int = None,
+        amount: int,
-        destination: str = None,
+        destination: str,
         destination_tag: int = None,
     ) -> None:
         self.amount = amount
@@ -26,7 +26,7 @@ class RipplePayment(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('amount', p.UVarintType, None),
+            1: ('amount', p.UVarintType, p.FLAG_REQUIRED),
-            2: ('destination', p.UnicodeType, None),
+            2: ('destination', p.UnicodeType, p.FLAG_REQUIRED),
             3: ('destination_tag', p.UVarintType, None),
         }

python/src/trezorlib/messages/RippleSignedTx.py

@@ -16,8 +16,8 @@ class RippleSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        signature: bytes = None,
+        signature: bytes,
-        serialized_tx: bytes = None,
+        serialized_tx: bytes,
     ) -> None:
         self.signature = signature
         self.serialized_tx = serialized_tx
@@ -25,6 +25,6 @@ class RippleSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('signature', p.BytesType, None),
+            1: ('signature', p.BytesType, p.FLAG_REQUIRED),
-            2: ('serialized_tx', p.BytesType, None),
+            2: ('serialized_tx', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/SignIdentity.py

@@ -18,9 +18,9 @@ class SignIdentity(p.MessageType):
     def __init__(
         self,
         *,
-        identity: IdentityType = None,
+        identity: IdentityType,
-        challenge_hidden: bytes = None,
+        challenge_hidden: bytes = b"",
-        challenge_visual: str = None,
+        challenge_visual: str = "",
         ecdsa_curve_name: str = None,
     ) -> None:
         self.identity = identity
@@ -31,8 +31,8 @@ class SignIdentity(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('identity', IdentityType, None),
+            1: ('identity', IdentityType, p.FLAG_REQUIRED),
-            2: ('challenge_hidden', p.BytesType, None),
+            2: ('challenge_hidden', p.BytesType, b""),  # default=
-            3: ('challenge_visual', p.UnicodeType, None),
+            3: ('challenge_visual', p.UnicodeType, ""),  # default=
             4: ('ecdsa_curve_name', p.UnicodeType, None),
         }

python/src/trezorlib/messages/SignedIdentity.py

@@ -16,18 +16,18 @@ class SignedIdentity(p.MessageType):
     def __init__(
         self,
         *,
+        public_key: bytes,
+        signature: bytes,
         address: str = None,
-        public_key: bytes = None,
-        signature: bytes = None,
     ) -> None:
-        self.address = address
         self.public_key = public_key
         self.signature = signature
+        self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
             1: ('address', p.UnicodeType, None),
-            2: ('public_key', p.BytesType, None),
+            2: ('public_key', p.BytesType, p.FLAG_REQUIRED),
-            3: ('signature', p.BytesType, None),
+            3: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/StellarAddress.py

@@ -16,12 +16,12 @@ class StellarAddress(p.MessageType):
     def __init__(
         self,
         *,
-        address: str = None,
+        address: str,
     ) -> None:
         self.address = address
 
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('address', p.UnicodeType, None),
+            1: ('address', p.UnicodeType, p.FLAG_REQUIRED),
         }

python/src/trezorlib/messages/StellarAssetType.py

@@ -15,7 +15,7 @@ class StellarAssetType(p.MessageType):
     def __init__(
         self,
         *,
-        type: int = None,
+        type: int,
         code: str = None,
         issuer: str = None,
     ) -> None:
@@ -26,7 +26,7 @@ class StellarAssetType(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('type', p.UVarintType, None),
+            1: ('type', p.UVarintType, p.FLAG_REQUIRED),
             2: ('code', p.UnicodeType, None),
             3: ('issuer', p.UnicodeType, None),
         }

python/src/trezorlib/messages/StellarSignedTx.py

@@ -16,8 +16,8 @@ class StellarSignedTx(p.MessageType):
     def __init__(
         self,
         *,
-        public_key: bytes = None,
+        public_key: bytes,
-        signature: bytes = None,
+        signature: bytes,
     ) -> None:
         self.public_key = public_key
         self.signature = signature
@@ -25,6 +25,6 @@ class StellarSignedTx(p.MessageType):
     @classmethod
     def get_fields(cls) -> Dict:
         return {
-            1: ('public_key', p.BytesType, None),
+            1: ('public_key', p.BytesType, p.FLAG_REQUIRED),
-            2: ('signature', p.BytesType, None),
+            2: ('signature', p.BytesType, p.FLAG_REQUIRED),
         }