lotus/blockstore/api.go
2021-01-29 23:17:25 +00:00

67 lines
1.4 KiB
Go

package blockstore
import (
"context"
blocks "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
"golang.org/x/xerrors"
)
type ChainIO interface {
ChainReadObj(context.Context, cid.Cid) ([]byte, error)
ChainHasObj(context.Context, cid.Cid) (bool, error)
}
type apiBlockstore struct {
api ChainIO
}
// This blockstore is adapted in the constructor.
var _ BasicBlockstore = (*apiBlockstore)(nil)
func NewAPIBlockstore(cio ChainIO) Blockstore {
bs := &apiBlockstore{api: cio}
return Adapt(bs) // return an adapted blockstore.
}
func (a *apiBlockstore) DeleteBlock(cid.Cid) error {
return xerrors.New("not supported")
}
func (a *apiBlockstore) Has(c cid.Cid) (bool, error) {
return a.api.ChainHasObj(context.TODO(), c)
}
func (a *apiBlockstore) Get(c cid.Cid) (blocks.Block, error) {
bb, err := a.api.ChainReadObj(context.TODO(), c)
if err != nil {
return nil, err
}
return blocks.NewBlockWithCid(bb, c)
}
func (a *apiBlockstore) GetSize(c cid.Cid) (int, error) {
bb, err := a.api.ChainReadObj(context.TODO(), c)
if err != nil {
return 0, err
}
return len(bb), nil
}
func (a *apiBlockstore) Put(blocks.Block) error {
return xerrors.New("not supported")
}
func (a *apiBlockstore) PutMany([]blocks.Block) error {
return xerrors.New("not supported")
}
func (a *apiBlockstore) AllKeysChan(ctx context.Context) (<-chan cid.Cid, error) {
return nil, xerrors.New("not supported")
}
func (a *apiBlockstore) HashOnRead(enabled bool) {
return
}