trezor-firmware/firmware/protob/messages.options

Features.vendor				max_size:33
Features.device_id			max_size:25
Features.language			max_size:17
Features.label				max_size:33
Features.coins				max_count:8
Features.revision			max_size:20
Features.bootloader_hash		max_size:32

ApplySettings.language			max_size:17
ApplySettings.label			max_size:33
ApplySettings.homescreen		max_size:1024

Ping.message				max_size:256

Success.message				max_size:256

Failure.message				max_size:256

ButtonRequest.data			max_size:256

PinMatrixAck.pin			max_size:10

PassphraseAck.passphrase		max_size:51

Entropy.entropy				max_size:1024

GetPublicKey.address_n			max_count:8
GetPublicKey.ecdsa_curve_name		max_size:32
GetPublicKey.coin_name			max_size:17

PublicKey.xpub				max_size:113

GetAddress.address_n			max_count:8
GetAddress.coin_name			max_size:17

Address.address				max_size:41

EthereumGetAddress.address_n		max_count:8
EthereumAddress.address			max_size:20

LoadDevice.mnemonic			max_size:241
LoadDevice.pin				max_size:10
LoadDevice.language			max_size:17
LoadDevice.label			max_size:33

ResetDevice.language			max_size:17
ResetDevice.label			max_size:33

EntropyAck.entropy			max_size:128

RecoveryDevice.language			max_size:17
RecoveryDevice.label			max_size:33

WordAck.word				max_size:12

SignMessage.address_n			max_count:8
SignMessage.message			max_size:1024
SignMessage.coin_name			max_size:17

VerifyMessage.address			max_size:41
VerifyMessage.signature			max_size:65
VerifyMessage.message			max_size:1024
VerifyMessage.coin_name			max_size:17

MessageSignature.address		max_size:41
MessageSignature.signature		max_size:65

EncryptMessage.pubkey			max_size:33
EncryptMessage.message			max_size:1024
EncryptMessage.address_n		max_count:8
EncryptMessage.coin_name		max_size:17

EncryptedMessage.nonce			max_size:33
EncryptedMessage.message		max_size:1120
EncryptedMessage.hmac			max_size:8

DecryptMessage.address_n		max_count:8
DecryptMessage.nonce			max_size:33
DecryptMessage.message			max_size:1120 # 1 + 9 + 1024 + 21 + 65
DecryptMessage.hmac			max_size:8

DecryptedMessage.address		max_size:41
DecryptedMessage.message		max_size:1024

CipherKeyValue.address_n		max_count:8
CipherKeyValue.key			max_size:256
CipherKeyValue.value			max_size:1024
CipherKeyValue.iv			max_size:16

CipheredKeyValue.value			max_size:1024

EstimateTxSize.coin_name		max_size:17

SignTx.coin_name			max_size:17

EthereumSignTx.address_n		max_count:8
EthereumSignTx.nonce			max_size:32
EthereumSignTx.gas_price		max_size:32
EthereumSignTx.gas_limit		max_size:32
EthereumSignTx.to			max_size:20
EthereumSignTx.value			max_size:32
EthereumSignTx.data_initial_chunk	max_size:1024
EthereumSignTx.prefix			max_size:32

EthereumTxRequest.signature_r		max_size:32
EthereumTxRequest.signature_s		max_size:32

EthereumTxAck.data_chunk		max_size:1024

SignIdentity.challenge_hidden		max_size:256
SignIdentity.challenge_visual		max_size:256
SignIdentity.ecdsa_curve_name		max_size:32

SignedIdentity.address			max_size:41
SignedIdentity.public_key		max_size:33
SignedIdentity.signature		max_size:65

GetECDHSessionKey.peer_public_key	max_size:65
GetECDHSessionKey.ecdsa_curve_name	max_size:32

ECDHSessionKey.session_key		max_size:65

# not used in firmware
SimpleSignTx				skip_message:true
FirmwareRequest				skip_message:true
FirmwareUpload				skip_message:true

# used in debug firmware

DebugLinkState.layout			max_size:1024
DebugLinkState.pin			max_size:10
DebugLinkState.matrix			max_size:10
DebugLinkState.mnemonic			max_size:241
DebugLinkState.reset_word		max_size:12
DebugLinkState.reset_entropy		max_size:128
DebugLinkState.recovery_fake_word	max_size:12

DebugLinkLog.bucket			max_size:33
DebugLinkLog.text			max_size:256

DebugLinkMemory.memory			max_size:1024
DebugLinkMemoryWrite.memory		max_size:1024