49 lines
1.7 KiB
Go
49 lines
1.7 KiB
Go
// VulcanizeDB
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// Copyright © 2019 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package streamer
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import (
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/ethereum/go-ethereum/statediff"
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"github.com/sirupsen/logrus"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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)
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// Streamer is the interface for streaming a statediff subscription
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type Streamer interface {
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Stream(payloadChan chan statediff.Payload) (*rpc.ClientSubscription, error)
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}
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// StateDiffStreamer is the underlying struct for the StateDiffStreamer interface
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type StateDiffStreamer struct {
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Client core.RPCClient
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}
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// NewStateDiffStreamer creates a pointer to a new StateDiffStreamer which satisfies the IStateDiffStreamer interface
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func NewStateDiffStreamer(client core.RPCClient) Streamer {
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return &StateDiffStreamer{
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Client: client,
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}
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}
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// Stream is the main loop for subscribing to data from the Geth state diff process
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func (sds *StateDiffStreamer) Stream(payloadChan chan statediff.Payload) (*rpc.ClientSubscription, error) {
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logrus.Info("streaming diffs from geth")
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return sds.Client.Subscribe("statediff", payloadChan, "stream")
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}
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