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client_blockstore.go
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client_blockstore.go
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package retrievaladapter
import (
"fmt"
"path/filepath"
"sync"
"github.com/ipfs/go-cid"
bstore "github.com/ipfs/go-ipfs-blockstore"
"github.com/ipld/go-car/v2/blockstore"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-fil-markets/retrievalmarket"
"github.com/filecoin-project/lotus/api"
lbstore "github.com/filecoin-project/lotus/blockstore"
)
// ProxyBlockstoreAccessor is an accessor that returns a fixed blockstore.
// To be used in combination with IPFS integration.
type ProxyBlockstoreAccessor struct {
Blockstore bstore.Blockstore
}
var _ retrievalmarket.BlockstoreAccessor = (*ProxyBlockstoreAccessor)(nil)
func NewFixedBlockstoreAccessor(bs bstore.Blockstore) retrievalmarket.BlockstoreAccessor {
return &ProxyBlockstoreAccessor{Blockstore: bs}
}
func (p *ProxyBlockstoreAccessor) Get(_ retrievalmarket.DealID, _ retrievalmarket.PayloadCID) (bstore.Blockstore, error) {
return p.Blockstore, nil
}
func (p *ProxyBlockstoreAccessor) Done(_ retrievalmarket.DealID) error {
return nil
}
func NewAPIBlockstoreAdapter(sub retrievalmarket.BlockstoreAccessor) *APIBlockstoreAccessor {
return &APIBlockstoreAccessor{
sub: sub,
retrStores: map[retrievalmarket.DealID]api.RemoteStoreID{},
remoteStores: map[api.RemoteStoreID]bstore.Blockstore{},
}
}
// APIBlockstoreAccessor adds support to API-specified remote blockstores
type APIBlockstoreAccessor struct {
sub retrievalmarket.BlockstoreAccessor
retrStores map[retrievalmarket.DealID]api.RemoteStoreID
remoteStores map[api.RemoteStoreID]bstore.Blockstore
accessLk sync.Mutex
}
func (a *APIBlockstoreAccessor) Get(id retrievalmarket.DealID, payloadCID retrievalmarket.PayloadCID) (bstore.Blockstore, error) {
a.accessLk.Lock()
defer a.accessLk.Unlock()
as, has := a.retrStores[id]
if !has {
return a.sub.Get(id, payloadCID)
}
return a.remoteStores[as], nil
}
func (a *APIBlockstoreAccessor) Done(id retrievalmarket.DealID) error {
a.accessLk.Lock()
defer a.accessLk.Unlock()
if _, has := a.retrStores[id]; has {
delete(a.retrStores, id)
return nil
}
return a.sub.Done(id)
}
func (a *APIBlockstoreAccessor) RegisterDealToRetrievalStore(id retrievalmarket.DealID, sid api.RemoteStoreID) error {
a.accessLk.Lock()
defer a.accessLk.Unlock()
if _, has := a.retrStores[id]; has {
return xerrors.Errorf("apistore for deal %d already registered", id)
}
if _, has := a.remoteStores[sid]; !has {
return xerrors.Errorf("remote store not found")
}
a.retrStores[id] = sid
return nil
}
func (a *APIBlockstoreAccessor) RegisterApiStore(sid api.RemoteStoreID, st *lbstore.NetworkStore) error {
a.accessLk.Lock()
defer a.accessLk.Unlock()
if _, has := a.remoteStores[sid]; has {
return xerrors.Errorf("remote store already registered with this uuid")
}
a.remoteStores[sid] = st
st.OnClose(func() {
a.accessLk.Lock()
defer a.accessLk.Unlock()
if _, has := a.remoteStores[sid]; has {
delete(a.remoteStores, sid)
}
})
return nil
}
var _ retrievalmarket.BlockstoreAccessor = &APIBlockstoreAccessor{}
type CARBlockstoreAccessor struct {
rootdir string
lk sync.Mutex
open map[retrievalmarket.DealID]*blockstore.ReadWrite
}
var _ retrievalmarket.BlockstoreAccessor = (*CARBlockstoreAccessor)(nil)
func NewCARBlockstoreAccessor(rootdir string) *CARBlockstoreAccessor {
return &CARBlockstoreAccessor{
rootdir: rootdir,
open: make(map[retrievalmarket.DealID]*blockstore.ReadWrite),
}
}
func (c *CARBlockstoreAccessor) Get(id retrievalmarket.DealID, payloadCid retrievalmarket.PayloadCID) (bstore.Blockstore, error) {
c.lk.Lock()
defer c.lk.Unlock()
bs, ok := c.open[id]
if ok {
return bs, nil
}
path := c.PathFor(id)
bs, err := blockstore.OpenReadWrite(path, []cid.Cid{payloadCid}, blockstore.UseWholeCIDs(true))
if err != nil {
return nil, err
}
c.open[id] = bs
return bs, nil
}
func (c *CARBlockstoreAccessor) Done(id retrievalmarket.DealID) error {
c.lk.Lock()
defer c.lk.Unlock()
bs, ok := c.open[id]
if !ok {
return nil
}
delete(c.open, id)
return bs.Finalize()
}
func (c *CARBlockstoreAccessor) PathFor(id retrievalmarket.DealID) string {
return filepath.Join(c.rootdir, fmt.Sprintf("%d.car", id))
}