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store.go
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package module
import (
"crypto/md5"
"encoding/json"
"errors"
"fmt"
"sync"
"github.com/ipfs/go-cid"
"github.com/ipfs/go-datastore"
"github.com/ipfs/go-datastore/query"
"github.com/textileio/powergate/deals"
"github.com/textileio/powergate/util"
)
var (
dsBaseStoragePending = datastore.NewKey("storage-pending")
dsBaseStorageFinal = datastore.NewKey("storage-final")
dsBaseRetrieval = datastore.NewKey("retrieval")
// ErrNotFound indicates the instance doesn't exist.
ErrNotFound = errors.New("cid info not found")
)
type store struct {
ds datastore.Datastore
lock sync.Mutex
}
func newStore(ds datastore.Datastore) *store {
return &store{
ds: ds,
}
}
func (s *store) putPendingDeal(dr deals.StorageDealRecord) error {
s.lock.Lock()
defer s.lock.Unlock()
buf, err := json.Marshal(dr)
if err != nil {
return fmt.Errorf("marshaling PendingDeal: %s", err)
}
if err := s.ds.Put(makePendingDealKey(dr.DealInfo.ProposalCid), buf); err != nil {
return fmt.Errorf("put PendingDeal: %s", err)
}
return nil
}
func (s *store) deletePendingDeal(proposalCid cid.Cid) error {
s.lock.Lock()
defer s.lock.Unlock()
if err := s.ds.Delete(makePendingDealKey(proposalCid)); err != nil {
return fmt.Errorf("delete PendingDeal: %s", err)
}
return nil
}
func (s *store) getPendingDeals() ([]deals.StorageDealRecord, error) {
s.lock.Lock()
defer s.lock.Unlock()
q := query.Query{Prefix: dsBaseStoragePending.String()}
res, err := s.ds.Query(q)
if err != nil {
return nil, fmt.Errorf("executing query: %s", err)
}
defer func() {
if err := res.Close(); err != nil {
log.Errorf("closing query result: %s", err)
}
}()
var ret []deals.StorageDealRecord
for r := range res.Next() {
var dr deals.StorageDealRecord
if err := json.Unmarshal(r.Value, &dr); err != nil {
return nil, fmt.Errorf("unmarshaling query result: %s", err)
}
ret = append(ret, dr)
}
return ret, nil
}
func (s *store) putFinalDeal(dr deals.StorageDealRecord) error {
s.lock.Lock()
defer s.lock.Unlock()
err := s.ds.Delete(makePendingDealKey(dr.DealInfo.ProposalCid))
if err != nil {
return fmt.Errorf("deleting PendingDeal: %s", err)
}
buf, err := json.Marshal(dr)
if err != nil {
return fmt.Errorf("marshaling DealRecord: %s", err)
}
if err := s.ds.Put(makeFinalDealKey(dr.DealInfo.ProposalCid), buf); err != nil {
return fmt.Errorf("put DealRecord: %s", err)
}
return nil
}
func (s *store) getFinalDeals() ([]deals.StorageDealRecord, error) {
s.lock.Lock()
defer s.lock.Unlock()
q := query.Query{Prefix: dsBaseStorageFinal.String()}
res, err := s.ds.Query(q)
if err != nil {
return nil, fmt.Errorf("executing query: %s", err)
}
defer func() {
if err := res.Close(); err != nil {
log.Errorf("closing query result: %s", err)
}
}()
var ret []deals.StorageDealRecord
for r := range res.Next() {
var dealRecord deals.StorageDealRecord
if err := json.Unmarshal(r.Value, &dealRecord); err != nil {
return nil, fmt.Errorf("unmarshaling query result: %s", err)
}
ret = append(ret, dealRecord)
}
return ret, nil
}
func (s *store) putRetrieval(rr deals.RetrievalDealRecord) error {
s.lock.Lock()
defer s.lock.Unlock()
buf, err := json.Marshal(rr)
if err != nil {
return fmt.Errorf("marshaling RetrievalRecord: %s", err)
}
if err := s.ds.Put(makeRetrievalKey(rr), buf); err != nil {
return fmt.Errorf("put RetrievalRecord: %s", err)
}
return nil
}
func (s *store) getRetrievals() ([]deals.RetrievalDealRecord, error) {
s.lock.Lock()
defer s.lock.Unlock()
q := query.Query{Prefix: dsBaseRetrieval.String()}
res, err := s.ds.Query(q)
if err != nil {
return nil, fmt.Errorf("executing query: %s", err)
}
defer func() {
if err := res.Close(); err != nil {
log.Errorf("closing query result: %s", err)
}
}()
var ret []deals.RetrievalDealRecord
for r := range res.Next() {
var rr deals.RetrievalDealRecord
if err := json.Unmarshal(r.Value, &rr); err != nil {
return nil, fmt.Errorf("unmarshaling query result: %s", err)
}
ret = append(ret, rr)
}
return ret, nil
}
func makePendingDealKey(c cid.Cid) datastore.Key {
return dsBaseStoragePending.ChildString(util.CidToString(c))
}
func makeFinalDealKey(c cid.Cid) datastore.Key {
return dsBaseStorageFinal.ChildString(util.CidToString(c))
}
func makeRetrievalKey(rr deals.RetrievalDealRecord) datastore.Key {
str := fmt.Sprintf("%v%v%v%v", rr.Time, rr.Addr, rr.DealInfo.Miner, util.CidToString(rr.DealInfo.RootCid))
sum := md5.Sum([]byte(str))
return dsBaseRetrieval.ChildString(fmt.Sprintf("%x", sum[:]))
}