Example #1
0
func (bs *blockstore) Get(k *cid.Cid) (blocks.Block, error) {
	if k == nil {
		log.Error("nil cid in blockstore")
		return nil, ErrNotFound
	}

	maybeData, err := bs.datastore.Get(dshelp.CidToDsKey(k))
	if err == ds.ErrNotFound {
		return nil, ErrNotFound
	}
	if err != nil {
		return nil, err
	}
	bdata, ok := maybeData.([]byte)
	if !ok {
		return nil, ValueTypeMismatch
	}

	if bs.rehash {
		rbcid, err := k.Prefix().Sum(bdata)
		if err != nil {
			return nil, err
		}

		if !rbcid.Equals(k) {
			return nil, ErrHashMismatch
		}

		return blocks.NewBlockWithCid(bdata, rbcid)
	} else {
		return blocks.NewBlockWithCid(bdata, k)
	}
}
Example #2
0
func (bs *blockstore) Put(block blocks.Block) error {
	k := dshelp.CidToDsKey(block.Cid())

	// Has is cheaper than Put, so see if we already have it
	exists, err := bs.datastore.Has(k)
	if err == nil && exists {
		return nil // already stored.
	}
	return bs.datastore.Put(k, block.RawData())
}
Example #3
0
func (bs *blockstore) PutMany(blocks []blocks.Block) error {
	t, err := bs.datastore.Batch()
	if err != nil {
		return err
	}
	for _, b := range blocks {
		k := dshelp.CidToDsKey(b.Cid())
		exists, err := bs.datastore.Has(k)
		if err == nil && exists {
			continue
		}

		err = t.Put(k, b.RawData())
		if err != nil {
			return err
		}
	}
	return t.Commit()
}
Example #4
0
func (s *blockstore) DeleteBlock(k *cid.Cid) error {
	return s.datastore.Delete(dshelp.CidToDsKey(k))
}
Example #5
0
func (bs *blockstore) Has(k *cid.Cid) (bool, error) {
	return bs.datastore.Has(dshelp.CidToDsKey(k))
}