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bolt.go
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bolt.go
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// Copyright (c) 2021 BitMaelum Authors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package pow
import (
"encoding/json"
"errors"
"path/filepath"
"github.com/bitmaelum/bitmaelum-suite/internal"
"github.com/sirupsen/logrus"
bolt "go.etcd.io/bbolt"
)
var (
errChallengeNotFound = errors.New("challenge not found")
errChallengeExpired = errors.New("challenge expired")
)
type boltStorage struct {
client *bolt.DB
}
// BucketName is the bucket name to store the invitations on the bolt db
const BucketName = "pow"
// BoltDBFile is the filename to store the boltdb database
const BoltDBFile = "pow.db"
// NewBolt initializes a new repository
func NewBolt(dbpath *string) Storable {
dbFile := filepath.Join(*dbpath, BoltDBFile)
db, err := bolt.Open(dbFile, 0600, nil)
if err != nil {
logrus.Error("Unable to open filepath ", dbFile, err)
return nil
}
return &boltStorage{
client: db,
}
}
func (b *boltStorage) Retrieve(challenge string) (*ProofOfWork, error) {
pow := &ProofOfWork{}
err := b.client.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket([]byte(BucketName))
if bucket == nil {
logrus.Trace("challenge not found in BOLT: ", challenge, nil)
return errChallengeNotFound
}
data := bucket.Get([]byte(challenge))
if data == nil {
logrus.Trace("challenge not found in BOLT: ", data, nil)
return errChallengeNotFound
}
err := json.Unmarshal([]byte(data), &pow)
if err != nil {
return err
}
return nil
})
if err != nil {
return nil, err
}
if pow.Expires.Unix() < internal.TimeNow().Unix() {
return nil, errChallengeExpired
}
return pow, nil
}
func (b *boltStorage) Store(pow *ProofOfWork) error {
data, err := json.Marshal(pow)
if err != nil {
return err
}
err = b.client.Update(func(tx *bolt.Tx) error {
bucket, err := tx.CreateBucketIfNotExists([]byte(BucketName))
if err != nil {
logrus.Trace("unable to create bucket on BOLT: ", BucketName, err)
return err
}
return bucket.Put([]byte(pow.Challenge), data)
})
return err
}
func (b *boltStorage) Remove(challenge string) error {
return b.client.Update(func(tx *bolt.Tx) error {
bucket := tx.Bucket([]byte(BucketName))
if bucket == nil {
logrus.Trace("unable to delete challenge, challenge not found in BOLT: ", challenge)
return nil
}
return bucket.Delete([]byte(challenge))
})
}