basic implementation of bitswap, needs testing/verification that it works

blocks.go

 package blocks
 
 import (
-	"fmt"
-	ds "github.com/jbenet/datastore.go"
 	u "github.com/jbenet/go-ipfs/util"
 	mh "github.com/jbenet/go-multihash"
 )
@@ -27,45 +25,3 @@ func NewBlock(data []byte) (*Block, error) {
 func (b *Block) Key() u.Key {
 	return u.Key(b.Multihash)
 }
-
-// BlockService is a block datastore.
-// It uses an internal `datastore.Datastore` instance to store values.
-type BlockService struct {
-	Datastore ds.Datastore
-	// Remote *bitswap.BitSwap // eventually.
-}
-
-// NewBlockService creates a BlockService with given datastore instance.
-func NewBlockService(d ds.Datastore) (*BlockService, error) {
-	if d == nil {
-		return nil, fmt.Errorf("BlockService requires valid datastore")
-	}
-	return &BlockService{Datastore: d}, nil
-}
-
-// AddBlock adds a particular block to the service, Putting it into the datastore.
-func (s *BlockService) AddBlock(b *Block) (u.Key, error) {
-	k := b.Key()
-	dsk := ds.NewKey(string(k))
-	return k, s.Datastore.Put(dsk, b.Data)
-}
-
-// GetBlock retrieves a particular block from the service,
-// Getting it from the datastore using the key (hash).
-func (s *BlockService) GetBlock(k u.Key) (*Block, error) {
-	dsk := ds.NewKey(string(k))
-	datai, err := s.Datastore.Get(dsk)
-	if err != nil {
-		return nil, err
-	}
-
-	data, ok := datai.([]byte)
-	if !ok {
-		return nil, fmt.Errorf("data associated with %s is not a []byte", k)
-	}
-
-	return &Block{
-		Multihash: mh.Multihash(k),
-		Data:      data,
-	}, nil
-}