more wip, squashme

chain/blocksync/blocksync_client.go

@@ -77,6 +77,14 @@ func (bs *BlockSync) GetBlocks(ctx context.Context, tipset []cid.Cid, count int)
 
 	var oerr error
 	for _, p := range peers {
+		// TODO: doing this synchronously isnt great, but fetching in parallel
+		// may not be a good idea either. think about this more
+		select {
+		case <-ctx.Done():
+			return nil, xerrors.Errorf("blocksync getblocks failed: %w", ctx.Err())
+		default:
+		}
+
 		res, err := bs.sendRequestToPeer(ctx, p, req)
 		if err != nil {
 			oerr = err

chain/sync_manager.go

@@ -54,6 +54,10 @@ func (sm *SyncManager) SetPeerHead(p peer.ID, ts *types.TipSet) {
 
 }
 
+func (sm *SyncManager) selectSyncTarget() (*types.TipSet, error) {
+	panic("NYI")
+}
+
 func (sm *SyncManager) syncWorker(id int) {
 	for {
 		select {