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keystore.go
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keystore.go
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// Copyright 2018 Shift Devices AG
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package keystore
import (
"errors"
"github.com/btcsuite/btcutil/hdkeychain"
"github.com/digitalbitbox/bitbox-wallet-app/backend/coins/coin"
"github.com/digitalbitbox/bitbox-wallet-app/backend/signing"
)
// ErrSigningAborted is used when the user aborts a signing in process (e.g. abort on HW wallet).
var ErrSigningAborted = errors.New("signing aborted by user")
// Keystore supports hardened key derivation according to BIP32 and signing of transactions.
type Keystore interface {
// // Configuration returns the configuration of the keystore.
// // The keypath is m/44' for singlesig and m/46' for multisig.
// Configuration() *signing.Configuration
// CosignerIndex returns the index at which the keystore signs in a multisig configuration.
// The returned value is always zero for a singlesig configuration.
CosignerIndex() int
// HasSecureOutput returns whether the keystore supports to output an address securely.
// This is typically done through a screen on the device or through a paired mobile phone.
HasSecureOutput(*signing.Configuration, coin.Coin) (bool, error)
// OutputAddress outputs the public key at the given configuration for the given coin.
// Please note that this is only supported if the keystore has a secure output channel.
OutputAddress(*signing.Configuration, coin.Coin) error
// ExtendedPublicKey returns the extended public key at the given absolute keypath.
ExtendedPublicKey(signing.AbsoluteKeypath) (*hdkeychain.ExtendedKey, error)
// SignMessage(string, *signing.AbsoluteKeypath, accounts.Coin) (*big.Int, error)
// SignTransaction signs the given transaction proposal. Returns ErrSigningAborted if the user
// aborts.
SignTransaction(interface{}) error
}