trezor-firmware/legacy/firmware/protob/messages-bitcoin.options

GetPublicKey.address_n                                      max_count:8
GetPublicKey.ecdsa_curve_name                               max_size:32
GetPublicKey.coin_name                                      max_size:21

PublicKey.xpub                                              max_size:113

GetAddress.address_n                                        max_count:8
GetAddress.coin_name                                        max_size:21

Address.address                                             max_size:130

SignTx.coin_name                                            max_size:21

SignMessage.address_n                                       max_count:8
SignMessage.message                                         max_size:1024
SignMessage.coin_name                                       max_size:21

VerifyMessage.address                                       max_size:130
VerifyMessage.signature                                     max_size:65
VerifyMessage.message                                       max_size:1024
VerifyMessage.coin_name                                     max_size:21

MessageSignature.address                                    max_size:130
MessageSignature.signature                                  max_size:65

TransactionType.inputs                                      max_count:1
TransactionType.bin_outputs                                 max_count:1
TransactionType.outputs                                     max_count:1
TransactionType.extra_data                                  max_size:1024

TxInputType.address_n                                       max_count:8
TxInputType.prev_hash                                       max_size:32
TxInputType.script_sig                                      max_size:1650
TxInputType.witness                                         max_size:109
TxInputType.ownership_proof                                 max_size:171
TxInputType.commitment_data                                 max_size:32

TxOutputType.address                                        max_size:130
TxOutputType.address_n                                      max_count:8
TxOutputType.op_return_data                                 max_size:80

TxOutputBinType.script_pubkey                               max_size:520

TxRequestDetailsType.tx_hash                                max_size:32

TxRequestSerializedType.signature                           max_size:73
TxRequestSerializedType.serialized_tx                       max_size:2048

MultisigRedeemScriptType.pubkeys                            max_count:15
MultisigRedeemScriptType.signatures                         max_count:15 max_size:73
MultisigRedeemScriptType.nodes                              max_count:15
MultisigRedeemScriptType.address_n                          max_count:8

HDNodePathType.address_n                                    max_count:8

GetOwnershipProof.address_n                                 max_count:8
GetOwnershipProof.coin_name                                 max_size:21
GetOwnershipProof.ownership_ids                             max_count:15 max_size:32
GetOwnershipProof.commitment_data                           max_size:32

OwnershipProof.ownership_proof                              max_size:171
OwnershipProof.signature                                    max_size:65

GetOwnershipId.address_n                                    max_count:8
GetOwnershipId.coin_name                                    max_size:21

OwnershipId.ownership_id                                    max_size:32

AuthorizeCoinJoin.coordinator                               max_size:18
AuthorizeCoinJoin.address_n                                 max_count:8
AuthorizeCoinJoin.coin_name                                 max_size:21