messages-management.proto

syntax = "proto2";
package hw.trezor.messages.management;

// Sugar for easier handling in Java
option java_package = "com.satoshilabs.trezor.lib.protobuf";
option java_outer_classname = "TrezorMessageManagement";

/**
 * Type of the mnemonic backup given/received by the device during reset/recovery.
 */
enum BackupType {
    Bip39 = 0;              // also called "Single Backup", see BIP-0039
    Slip39_Basic = 1;       // also called "Shamir Backup", see SLIP-0039
    Slip39_Advanced = 2;    // also called "Super Shamir" or "Shamir with Groups", see SLIP-0039#two-level-scheme
}

/**
 * Level of safety checks for unsafe actions like spending from invalid path namespace or setting high transaction fee.
 */
enum SafetyCheckLevel {
    Strict = 0;             // disallow unsafe actions, this is the default
    PromptAlways = 1;       // ask user before unsafe action
    PromptTemporarily = 2;  // like PromptAlways but reverts to Strict after reboot
}

/**
 * Request: Reset device to default state and ask for device details
 * @start
 * @next Features
 */
message Initialize {
    optional bytes session_id = 1;           // assumed device session id; Trezor clears caches if it is different or empty
}

/**
 * Request: Ask for device details (no device reset)
 * @start
 * @next Features
 */
message GetFeatures {
}

/**
 * Response: Reports various information about the device
 * @end
 */
message Features {
    optional string vendor = 1;                 // name of the manufacturer, e.g. "trezor.io"
    required uint32 major_version = 2;          // major version of the firmware/bootloader, e.g. 1
    required uint32 minor_version = 3;          // minor version of the firmware/bootloader, e.g. 0
    required uint32 patch_version = 4;          // patch version of the firmware/bootloader, e.g. 0
    optional bool bootloader_mode = 5;          // is device in bootloader mode?
    optional string device_id = 6;              // device's unique identifier
    optional bool pin_protection = 7;           // is device protected by PIN?
    optional bool passphrase_protection = 8;    // is node/mnemonic encrypted using passphrase?
    optional string language = 9;               // device language
    optional string label = 10;                 // device description label
    optional bool initialized = 12;             // does device contain seed?
    optional bytes revision = 13;               // SCM revision of firmware
    optional bytes bootloader_hash = 14;        // hash of the bootloader
    optional bool imported = 15;                // was storage imported from an external source?
    optional bool unlocked = 16;                // is the device unlocked? called "pin_cached" previously
//    optional bool passphrase_cached = 17;       // is passphrase already cached in session?  DEPRECATED
    optional bool firmware_present = 18;        // is valid firmware loaded?
    optional bool needs_backup = 19;            // does storage need backup? (equals to Storage.needs_backup)
    optional uint32 flags = 20;                 // device flags (equals to Storage.flags)
    optional string model = 21;                 // device hardware model
    optional uint32 fw_major = 22;              // reported firmware version if in bootloader mode
    optional uint32 fw_minor = 23;              // reported firmware version if in bootloader mode
    optional uint32 fw_patch = 24;              // reported firmware version if in bootloader mode
    optional string fw_vendor = 25;             // reported firmware vendor if in bootloader mode
    optional bytes fw_vendor_keys = 26;         // reported firmware vendor keys (their hash)
    optional bool unfinished_backup = 27;       // report unfinished backup (equals to Storage.unfinished_backup)
    optional bool no_backup = 28;               // report no backup (equals to Storage.no_backup)
    optional bool recovery_mode = 29;           // is recovery mode in progress
    repeated Capability capabilities = 30;      // list of supported capabilities
    enum Capability {
        Capability_Bitcoin = 1;
        Capability_Bitcoin_like = 2;            // Altcoins based on the Bitcoin source code
        Capability_Binance = 3;
        Capability_Cardano = 4;
        Capability_Crypto = 5;                  // generic crypto operations for GPG, SSH, etc.
        Capability_EOS = 6;
        Capability_Ethereum = 7;
        Capability_Lisk = 8;
        Capability_Monero = 9;
        Capability_NEM = 10;
        Capability_Ripple = 11;
        Capability_Stellar = 12;
        Capability_Tezos = 13;
        Capability_U2F = 14;
        Capability_Shamir = 15;
        Capability_ShamirGroups = 16;
        Capability_PassphraseEntry = 17;        // the device is capable of passphrase entry directly on the device
    }
    optional BackupType backup_type = 31;       // type of device backup (BIP-39 / SLIP-39 basic / SLIP-39 advanced)
    optional bool sd_card_present = 32;         // is SD card present
    optional bool sd_protection = 33;           // is SD Protect enabled
    optional bool wipe_code_protection = 34;    // is wipe code protection enabled
    optional bytes session_id = 35;
    optional bool passphrase_always_on_device = 36;  // device enforces passphrase entry on Trezor
    optional SafetyCheckLevel safety_checks = 37;            // safety check level, set to Prompt to limit path namespace enforcement
    optional uint32 auto_lock_delay_ms = 38;    // number of milliseconds after which the device locks itself
    optional uint32 display_rotation = 39;      // in degrees from North
    optional bool experimental_features = 40;   // are experimental message types enabled?
}

/**
 * Request: soft-lock the device. Following actions will require PIN. Passphrases remain cached.
 * @start
 * @next Success
 */
message LockDevice {
}

/**
 * Request: end the current sesson. Following actions must call Initialize again.
 * Cache for the current session is discarded, other sessions remain intact.
 * Device is not PIN-locked.
 * @start
 * @next Success
 */
message EndSession {
}

/**
 * Request: change language and/or label of the device
 * @start
 * @next Success
 * @next Failure
 */
message ApplySettings {
    optional string language = 1;
    optional string label = 2;
    optional bool use_passphrase = 3;
    optional bytes homescreen = 4;
//    optional PassphraseSourceType passphrase_source = 5;  DEPRECATED
    optional uint32 auto_lock_delay_ms = 6;
    optional uint32 display_rotation = 7;  // in degrees from North
    optional bool passphrase_always_on_device = 8;  // do not prompt for passphrase, enforce device entry
    optional SafetyCheckLevel safety_checks = 9;  // Safety check level, set to Prompt to limit path namespace enforcement
    optional bool experimental_features = 10;  // enable experimental message types
}

/**
 * Request: set flags of the device
 * @start
 * @next Success
 * @next Failure
 */
message ApplyFlags {
    optional uint32 flags = 1;  // bitmask, can only set bits, not unset
}

/**
 * Request: Starts workflow for setting/changing/removing the PIN
 * @start
 * @next Success
 * @next Failure
 */
message ChangePin {
    optional bool remove = 1;   // is PIN removal requested?
}

/**
 * Request: Starts workflow for setting/removing the wipe code
 * @start
 * @next Success
 * @next Failure
 */
message ChangeWipeCode {
    optional bool remove = 1;   // is wipe code removal requested?
}

/**
 * Request: Starts workflow for enabling/regenerating/disabling SD card protection
 * @start
 * @next Success
 * @next Failure
 */
message SdProtect {
    optional SdProtectOperationType operation = 1;
    /**
    * Structure representing SD card protection operation
    */
    enum SdProtectOperationType {
        DISABLE = 0;
        ENABLE = 1;
        REFRESH = 2;
    }
}

/**
 * Request: Test if the device is alive, device sends back the message in Success response
 * @start
 * @next Success
 */
message Ping {
    optional string message = 1 [default=""];   // message to send back in Success message
    optional bool button_protection = 2;        // ask for button press
}

/**
 * Request: Abort last operation that required user interaction
 * @start
 * @next Failure
 */
message Cancel {
}

/**
 * Request: Request a sample of random data generated by hardware RNG. May be used for testing.
 * @start
 * @next Entropy
 * @next Failure
 */
message GetEntropy {
    required uint32 size = 1;       // size of requested entropy
}

/**
 * Response: Reply with random data generated by internal RNG
 * @end
 */
message Entropy {
    required bytes entropy = 1;     // chunk of random generated bytes
}

/**
 * Request: Request device to wipe all sensitive data and settings
 * @start
 * @next Success
 * @next Failure
 */
message WipeDevice {
}

/**
 * Request: Load seed and related internal settings from the computer
 * @start
 * @next Success
 * @next Failure
 */
message LoadDevice {
    repeated string mnemonics = 1;                          // seed encoded as mnemonic (12, 18 or 24 words for BIP39, 20 or 33 for SLIP39)
    optional string pin = 3;                                // set PIN protection
    optional bool passphrase_protection = 4;                // enable master node encryption using passphrase
    optional string language = 5 [default='en-US'];         // device language (IETF BCP 47 language tag)
    optional string label = 6;                              // device label
    optional bool skip_checksum = 7;                        // do not test mnemonic for valid BIP-39 checksum
    optional uint32 u2f_counter = 8;                        // U2F counter
    optional bool needs_backup = 9;                         // set "needs backup" flag
    optional bool no_backup = 10;                           // indicate that no backup is going to be made
}

/**
 * Request: Ask device to do initialization involving user interaction
 * @start
 * @next EntropyRequest
 * @next Failure
 */
message ResetDevice {
    optional bool display_random = 1;                       // display entropy generated by the device before asking for additional entropy
    optional uint32 strength = 2 [default=256];             // strength of seed in bits
    optional bool passphrase_protection = 3;                // enable master node encryption using passphrase
    optional bool pin_protection = 4;                       // enable PIN protection
    optional string language = 5 [default='en-US'];         // device language (IETF BCP 47 language tag)
    optional string label = 6;                              // device label
    optional uint32 u2f_counter = 7;                        // U2F counter
    optional bool skip_backup = 8;                          // postpone seed backup to BackupDevice workflow
    optional bool no_backup = 9;                            // indicate that no backup is going to be made
    optional BackupType backup_type = 10 [default=Bip39];   // type of the mnemonic backup
}

/**
 * Request: Perform backup of the device seed if not backed up using ResetDevice
 * @start
 * @next Success
 */
message BackupDevice {
}

/**
 * Response: Ask for additional entropy from host computer
 * @next EntropyAck
 */
message EntropyRequest {
}

/**
 * Request: Provide additional entropy for seed generation function
 * @next Success
 */
message EntropyAck {
    optional bytes entropy = 1;     // 256 bits (32 bytes) of random data
}

/**
 * Request: Start recovery workflow asking user for specific words of mnemonic
 * Used to recovery device safely even on untrusted computer.
 * @start
 * @next WordRequest
 */
message RecoveryDevice {
    optional uint32 word_count = 1;                     // number of words in BIP-39 mnemonic
    optional bool passphrase_protection = 2;            // enable master node encryption using passphrase
    optional bool pin_protection = 3;                   // enable PIN protection
    optional string language = 4;                       // device language (IETF BCP 47 language tag)
    optional string label = 5;                          // device label
    optional bool enforce_wordlist = 6;                 // enforce BIP-39 wordlist during the process
    // 7 reserved for unused recovery method
    optional RecoveryDeviceType type = 8;               // supported recovery type
    optional uint32 u2f_counter = 9;                    // U2F counter
    optional bool dry_run = 10;                         // perform dry-run recovery workflow (for safe mnemonic validation)
    /**
     * Type of recovery procedure. These should be used as bitmask, e.g.,
     * `RecoveryDeviceType_ScrambledWords | RecoveryDeviceType_Matrix`
     * listing every method supported by the host computer.
     *
     * Note that ScrambledWords must be supported by every implementation
     * for backward compatibility; there is no way to not support it.
     */
    enum RecoveryDeviceType {
        // use powers of two when extending this field
        RecoveryDeviceType_ScrambledWords = 0;        // words in scrambled order
        RecoveryDeviceType_Matrix = 1;                // matrix recovery type
    }
}

/**
 * Response: Device is waiting for user to enter word of the mnemonic
 * Its position is shown only on device's internal display.
 * @next WordAck
 */
message WordRequest {
    optional WordRequestType type = 1;
    /**
    * Type of Recovery Word request
    */
    enum WordRequestType {
        WordRequestType_Plain = 0;
        WordRequestType_Matrix9 = 1;
        WordRequestType_Matrix6 = 2;
    }
}

/**
 * Request: Computer replies with word from the mnemonic
 * @next WordRequest
 * @next Success
 * @next Failure
 */
message WordAck {
    required string word = 1;           // one word of mnemonic on asked position
}

/**
 * Request: Set U2F counter
 * @start
 * @next Success
 */
message SetU2FCounter {
    optional uint32 u2f_counter = 1;
}

/**
 * Request: Set U2F counter
 * @start
 * @next NextU2FCounter
 */
message GetNextU2FCounter {
}

/**
 * Request: Set U2F counter
 * @end
 */
message NextU2FCounter {
    optional uint32 u2f_counter = 1;
}

/**
 * Request: Ask device to prepare for a preauthorized operation.
 * @start
 * @next PreauthorizedRequest
 * @next Failure
 */
message DoPreauthorized {
}

/**
 * Request: Device awaits a preauthorized operation.
 * @start
 * @next SignTx
 * @next GetOwnershipProof
 */
message PreauthorizedRequest {
}

/**
 * Request: Cancel any outstanding authorization in the current session.
 * @start
 * @next Success
 * @next Failure
 */
message CancelAuthorization {
}

/**
 * Request: Reboot firmware to bootloader
 * @start
 * @next Success
 */
message RebootToBootloader {
}