/**
 * Types for TREZOR communication
 *
 * @author	Marek Palatinus <slush@satoshilabs.com>
 * @version	0.6
 */

// Sugar for easier handling in Multibit
option java_package = "org.multibit.hd.hardware.trezor.protobuf";
option java_outer_classname = "TrezorType";

import "google/protobuf/descriptor.proto";

/**
 * Options for specifying message direction and type of wire (normal/debug)
 */
extend google.protobuf.EnumValueOptions {
	optional bool wire_in = 50002;		// message can be transmitted via wire from PC to TREZOR
	optional bool wire_out = 50003;		// message can be transmitted via wire from TREZOR to PC
	optional bool wire_debug_in = 50004;	// message can be transmitted via debug wire from PC to TREZOR
	optional bool wire_debug_out = 50005;	// message can be transmitted via debug wire from TREZOR to PC
}

/**
 * Type of failures returned by Failure message
 * @used_in Failure
 */
enum FailureType {
	Failure_UnexpectedMessage = 1;
	Failure_ButtonExpected = 2;
	Failure_SyntaxError = 3;
	Failure_ActionCancelled = 4;
	Failure_PinExpected = 5;
	Failure_PinCancelled = 6;
	Failure_PinInvalid = 7;
	Failure_InvalidSignature = 8;
	Failure_Other = 9;
	Failure_NotEnoughFunds = 10;
	Failure_NotInitialized = 11;
	Failure_FirmwareError = 99;
}

/**
 * Type of script which will be used for transaction output
 * @used_in TxOutputType
 */
enum ScriptType {
	PAYTOADDRESS = 0;
	PAYTOSCRIPTHASH = 1;
}

/**
 * Type of information required by transaction signing process
 * @used_in TxRequest
 */
enum RequestType {
	TXINPUT = 0;
	TXOUTPUT = 1;
	TXMETA = 2;
}

/**
 * Type of button request
 * @used_in ButtonRequest
 */
enum ButtonRequestType {
	ButtonRequest_Other = 1;
	ButtonRequest_FeeOverThreshold = 2;
	ButtonRequest_ConfirmOutput = 3;
	ButtonRequest_ResetDevice = 4;
	ButtonRequest_ConfirmWord = 5;
	ButtonRequest_WipeDevice = 6;
	ButtonRequest_ProtectCall = 7;
	ButtonRequest_SignTx = 8;
}

/**
 * Type of PIN request
 * @used_in PinMatrixRequest
 */
enum PinMatrixRequestType {
	PinMatrixRequestType_Current = 1;
	PinMatrixRequestType_NewFirst = 2;
	PinMatrixRequestType_NewSecond = 3;
}

/**
 * Structure representing BIP32 (hierarchical deterministic) node
 * Used for imports of private key into the device and exporting public key out of device
 * @used_in PublicKey
 * @used_in LoadDevice
 * @used_in DebugLinkState
 * @used_in Storage
 */
message HDNodeType {
	required uint32 depth = 1;
	required uint32 fingerprint = 2;
	required uint32 child_num = 3;
	required bytes chain_code = 4;
	optional bytes private_key = 5;
	optional bytes public_key = 6;
}

/**
 * Structure representing Coin
 * @used_in Features
 */
message CoinType {
	optional string coin_name = 1;
	optional string coin_shortcut = 2;
	optional uint32 address_type = 3;
	optional uint64 maxfee_kb = 4;
}

/**
 * Structure representing transaction input
 * @used_in SimpleSignTx
 * @used_in TransactionType
 */
message TxInputType {
	repeated uint32 address_n = 1;				// BIP-32 path to derive the key from master node
	required bytes prev_hash = 2;				// hash of previous transaction output to spend by this input
	required uint32 prev_index = 3;				// index of previous output to spend
	optional bytes script_sig = 4;				// script signature
	optional uint32 sequence = 5 [default=0xffffffff];	// sequence
}

/**
 * Structure representing transaction output
 * @used_in SimpleSignTx
 * @used_in TransactionType
 */
message TxOutputType {
	optional string address = 1;		// target coin address in Base58 encoding
	repeated uint32 address_n = 2;		// BIP-32 path to derive the key from master node; has higher priority than "address"
	required uint64 amount = 3;		// amount to spend in satoshis
	required ScriptType script_type = 4;	// output script type
	repeated bytes script_args = 5;		// additional parameters for the script (script-dependent)
}

/**
 * Structure representing compiled transaction output
 * @used_in TransactionType
 */
message TxOutputBinType {
	required uint64 amount = 1;
	required bytes script_pubkey = 2;
}

/**
 * Structure representing transaction
 * @used_in SimpleSignTx
 */
message TransactionType {
	optional uint32 version = 1;
	repeated TxInputType inputs = 2;
	repeated TxOutputBinType outputs = 3;
	repeated TxOutputType our_outputs = 4;
	optional uint32 lock_time = 5;
}