vulcanizedb seed node streamer and syncPublishScreenAndServe command

2019-12-02 13:24:51 -06:00
parent 1dc46640cf
commit 2db0ce971d
3 changed files with 120 additions and 4 deletions
@@ -0,0 +1,47 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+// Streamer is used by watchers to stream eth data from a vulcanizedb seed node
+package streamer
+
+import (
+	"github.com/ethereum/go-ethereum/rpc"
+
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/ipfs"
+)
+
+// IStreamer is the interface for streaming data from a vulcanizeDB seed node
+type IStreamer interface {
+	Stream(payloadChan chan ipfs.ResponsePayload, streamFilters ipfs.StreamFilters) (*rpc.ClientSubscription, error)
+}
+
+// Streamer is the underlying struct for the IStreamer interface
+type Streamer struct {
+	Client core.RpcClient
+}
+
+// NewSeedStreamer creates a pointer to a new Streamer which satisfies the IStreamer interface
+func NewSeedStreamer(client core.RpcClient) *Streamer {
+	return &Streamer{
+		Client: client,
+	}
+}
+
+// Stream is the main loop for subscribing to data from a vulcanizedb seed node
+func (sds *Streamer) Stream(payloadChan chan ipfs.ResponsePayload, streamFilters ipfs.StreamFilters) (*rpc.ClientSubscription, error) {
+	return sds.Client.Subscribe("vulcanizedb", payloadChan, "subscribe")
+}