syntax = "proto3";

package walletrpc;

service VersionService {
	rpc Version (VersionRequest) returns (VersionResponse);
}

message VersionRequest {}
message VersionResponse {
	string version_string = 1;
	uint32 major = 2;
	uint32 minor = 3;
	uint32 patch = 4;
	string prerelease = 5;
	string build_metadata = 6;
}

service WalletService {
	// Queries
	rpc Ping (PingRequest) returns (PingResponse);
	rpc Network (NetworkRequest) returns (NetworkResponse);
	rpc AccountNumber (AccountNumberRequest) returns (AccountNumberResponse);
	rpc Accounts (AccountsRequest) returns (AccountsResponse);
	rpc Balance (BalanceRequest) returns (BalanceResponse);
	rpc GetTransactions (GetTransactionsRequest) returns (GetTransactionsResponse);

	// Notifications
	rpc TransactionNotifications (TransactionNotificationsRequest) returns (stream TransactionNotificationsResponse);
	rpc SpentnessNotifications (SpentnessNotificationsRequest) returns (stream SpentnessNotificationsResponse);
	rpc AccountNotifications (AccountNotificationsRequest) returns (stream AccountNotificationsResponse);

	// Control
	rpc ChangePassphrase (ChangePassphraseRequest) returns (ChangePassphraseResponse);
	rpc RenameAccount (RenameAccountRequest) returns (RenameAccountResponse);
	rpc NextAccount (NextAccountRequest) returns (NextAccountResponse);
	rpc NextAddress (NextAddressRequest) returns (NextAddressResponse);
	rpc ImportPrivateKey (ImportPrivateKeyRequest) returns (ImportPrivateKeyResponse);
	rpc FundTransaction (FundTransactionRequest) returns (FundTransactionResponse);
	rpc SignTransaction (SignTransactionRequest) returns (SignTransactionResponse);
	rpc PublishTransaction (PublishTransactionRequest) returns (PublishTransactionResponse);
}

service WalletLoaderService {
	rpc WalletExists (WalletExistsRequest) returns (WalletExistsResponse);
	rpc CreateWallet (CreateWalletRequest) returns (CreateWalletResponse);
	rpc OpenWallet (OpenWalletRequest) returns (OpenWalletResponse);
	rpc CloseWallet (CloseWalletRequest) returns (CloseWalletResponse);
	rpc StartBtcdRpc (StartBtcdRpcRequest) returns (StartBtcdRpcResponse);
}

message TransactionDetails {
	message Input {
		uint32 index = 1;
		uint32 previous_account = 2;
		int64 previous_amount = 3;
	}
	message Output {
		bool mine = 3;

		// These fields only relevant if mine==true.
		uint32 account = 4;
		bool internal = 5;

		// These fields only relevant if mine==false.
		repeated string addresses = 6; // None if non-standard.
	}
	bytes hash = 1;
	bytes transaction = 2;
	repeated Input debits = 3;
	repeated Output outputs = 4;
	int64 fee = 5;
	int64 timestamp = 6; // May be earlier than a block timestamp, but never later.
}

message BlockDetails {
	bytes hash = 1;
	int32 height = 2;
	int64 timestamp = 3;
	repeated TransactionDetails transactions = 4;
}

message AccountBalance {
	uint32 account = 1;
	int64 total_balance = 2;
}

message PingRequest {}
message PingResponse {}

message NetworkRequest {}
message NetworkResponse {
	uint32 active_network = 1;
}

message AccountNumberRequest {
	string account_name = 1;
}
message AccountNumberResponse {
	uint32 account_number = 1;
}

message AccountsRequest {}
message AccountsResponse {
	message Account {
		uint32 account_number = 1;
		string account_name = 2;
		int64 total_balance = 3;
		uint32 external_key_count = 4;
		uint32 internal_key_count = 5;
		uint32 imported_key_count = 6;
	}
	repeated Account accounts = 1;
	bytes current_block_hash = 2;
	int32 current_block_height = 3;
}

message RenameAccountRequest {
	uint32 account_number = 1;
	string new_name = 2;
}
message RenameAccountResponse {}

message NextAccountRequest {
	bytes passphrase = 1;
	string account_name = 2;
}
message NextAccountResponse {
	uint32 account_number = 1;
}

message NextAddressRequest {
	uint32 account = 1;
	enum Kind {
	     BIP0044_EXTERNAL = 0;
	     BIP0044_INTERNAL = 1;
	}
	Kind kind = 2;
}
message NextAddressResponse {
	string address = 1;
}

message ImportPrivateKeyRequest {
	bytes passphrase = 1;
	uint32 account = 2;
	string private_key_wif = 3;
	bool rescan = 4;
}
message ImportPrivateKeyResponse {
}

message BalanceRequest {
	uint32 account_number = 1;
	int32 required_confirmations = 2;
}
message BalanceResponse {
	int64 total = 1;
	int64 spendable = 2;
	int64 immature_reward = 3;
}

message GetTransactionsRequest {
	// Optionally specify the starting block from which to begin including all transactions.
	// Either the starting block hash or height may be specified, but not both.
	// If a block height is specified and is negative, the absolute value becomes the number of
	// last blocks to include.  That is, given a current chain height of 1000 and a starting block
	// height of -3, transaction notifications will be created for blocks 998, 999, and 1000.
	// If both options are excluded, transaction results are created for transactions since the
	// genesis block.
	bytes starting_block_hash = 1;
	sint32 starting_block_height = 2;

	// Optionally specify the last block that transaction results may appear in.
	// Either the ending block hash or height may be specified, but not both.
	// If both are excluded, transaction results are created for all transactions
	// through the best block, and include all unmined transactions.
	bytes ending_block_hash = 3;
	int32 ending_block_height = 4;
	
	// Include at least this many of the newest transactions if they exist.
	// Cannot be used when the ending block hash is specified.
	//
	// TODO: remove until spec adds it back in some way.
	int32 minimum_recent_transactions = 5;

	// TODO: limit max number of txs?
}
message GetTransactionsResponse {
	repeated BlockDetails mined_transactions = 1;
	repeated TransactionDetails unmined_transactions = 2;
}

message ChangePassphraseRequest {
	enum Key {
	     PRIVATE = 0;
	     PUBLIC = 1;
	}
	Key key = 1;
	bytes old_passphrase = 2;
	bytes new_passphrase = 3;
}
message ChangePassphraseResponse {}

message FundTransactionRequest {
	uint32 account = 1;
	int64 target_amount = 2;
	int32 required_confirmations = 3;
	bool include_immature_coinbases = 4;
	bool include_change_script = 5;
}
message FundTransactionResponse {
	message PreviousOutput {
		bytes transaction_hash = 1;
		uint32 output_index = 2;
		int64 amount = 3;
		bytes pk_script = 4;
		int64 receive_time = 5;
		bool from_coinbase = 6;
	}
	repeated PreviousOutput selected_outputs = 1;
	int64 total_amount = 2;
	bytes change_pk_script = 3;
}

message SignTransactionRequest {
	bytes passphrase = 1;
	
	bytes serialized_transaction = 2;

	// If no indexes are specified, signatures scripts will be added for
	// every input. If any input indexes are specified, only those inputs
	// will be signed.  Rather than returning an incompletely signed
	// transaction if any of the inputs to be signed can not be, the RPC
	// immediately errors.
	repeated uint32 input_indexes = 3;
}
message SignTransactionResponse {
	bytes transaction = 1;
	repeated uint32 unsigned_input_indexes = 2;
}

message PublishTransactionRequest {
	bytes signed_transaction = 1;
}
message PublishTransactionResponse {}

message TransactionNotificationsRequest {}
message TransactionNotificationsResponse {
	// Sorted by increasing height.  This is a repeated field so many new blocks
	// in a new best chain can be notified at once during a reorganize.
	repeated BlockDetails attached_blocks = 1;

	// If there was a chain reorganize, there may have been blocks with wallet
	// transactions that are no longer in the best chain.  These are those
	// block's hashes.
	repeated bytes detached_blocks = 2;
	
	// Any new unmined transactions are included here.  These unmined transactions
	// refer to the current best chain, so transactions from detached blocks may
	// be moved to mempool and included here if they are not mined or double spent
	// in the new chain.  Additonally, if no new blocks were attached but a relevant
	// unmined transaction is seen by the wallet, it will be reported here.
	repeated TransactionDetails unmined_transactions = 3;

	// Instead of notifying all of the removed unmined transactions,
	// just send all of the current hashes.
	repeated bytes unmined_transaction_hashes = 4;
}

message SpentnessNotificationsRequest {
	uint32 account = 1;
	bool no_notify_unspent = 2;
	bool no_notify_spent = 3;
}

message SpentnessNotificationsResponse {
	bytes transaction_hash = 1;
	uint32 output_index = 2;
	message Spender {
		bytes transaction_hash = 1;
		uint32 input_index = 2;
	}
	Spender spender = 3;
}

message AccountNotificationsRequest {}
message AccountNotificationsResponse {
	uint32 account_number = 1;
	string account_name = 2;
	uint32 external_key_count = 3;
	uint32 internal_key_count = 4;
	uint32 imported_key_count = 5;
}

message CreateWalletRequest {
	bytes public_passphrase = 1;
	bytes private_passphrase = 2;
	bytes seed = 3;
}
message CreateWalletResponse {}

message OpenWalletRequest {
	bytes public_passphrase = 1;
}
message OpenWalletResponse {}

message CloseWalletRequest {}
message CloseWalletResponse {}

message WalletExistsRequest {}
message WalletExistsResponse {
	bool exists = 1;
}

message StartBtcdRpcRequest {
	string network_address = 1;
	string username = 2;
	bytes password = 3;
	bytes certificate = 4;
}
message StartBtcdRpcResponse {}