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interface.go
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interface.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 db
import "github.com/digitalbitbox/bitbox-wallet-app/backend/coins/eth/types"
// TxInterface needs to be implemented to persist all wallet/transaction related data.
type TxInterface interface {
// Commit closes the transaction, writing the changes.
Commit() error
// Rollback closes the transaction without writing anything and be called safely after Commit().
Rollback()
// PutOutgoingTransaction stores the transaction in the collection of outgoing transactions.
PutOutgoingTransaction(*types.TransactionWithMetadata) error
// OutgoingTransactions returns the stored list of outgoing transactions, sorted descending by
// the transaction nonce.
OutgoingTransactions() ([]*types.TransactionWithMetadata, error)
}
// Interface can be implemented by database backends to open database transactions.
type Interface interface {
// Begin starts a DB transaction. Apply `defer tx.Rollback()` in any case after. Use
// `tx.Commit()` to commit the write operations.
Begin() (TxInterface, error)
Close() error
}