feat(exchange) pass ctx to exchange.HasBlock(...)

bitswap.go

@@ -128,8 +128,7 @@ func (bs *bitswap) sendToPeersThatWant(ctx context.Context, block blocks.Block)
 
 // HasBlock announces the existance of a block to bitswap, potentially sending
 // it to peers (Partners) whose WantLists include it.
-func (bs *bitswap) HasBlock(blk blocks.Block) error {
-	ctx := context.TODO()
+func (bs *bitswap) HasBlock(ctx context.Context, blk blocks.Block) error {
 	go bs.sendToPeersThatWant(ctx, blk)
 	return bs.routing.Provide(blk.Key())
 }

offline.go

@@ -27,6 +27,6 @@ func (_ *offlineExchange) Block(context.Context, u.Key) (*blocks.Block, error) {
 }
 
 // HasBlock always returns nil.
-func (_ *offlineExchange) HasBlock(blocks.Block) error {
+func (_ *offlineExchange) HasBlock(context.Context, blocks.Block) error {
 	return nil
 }

offline_test.go

@@ -11,7 +11,7 @@ import (
 
 func TestBlockReturnsErr(t *testing.T) {
 	off := NewOfflineExchange()
-	_, err := off.Block(context.TODO(), u.Key("foo"))
+	_, err := off.Block(context.Background(), u.Key("foo"))
 	if err != nil {
 		return // as desired
 	}
@@ -21,7 +21,7 @@ func TestBlockReturnsErr(t *testing.T) {
 func TestHasBlockReturnsNil(t *testing.T) {
 	off := NewOfflineExchange()
 	block := testutil.NewBlockOrFail(t, "data")
-	err := off.HasBlock(block)
+	err := off.HasBlock(context.Background(), block)
 	if err != nil {
 		t.Fatal("")
 	}