49 lines
1.9 KiB
Go
49 lines
1.9 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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// Streamer is used by watchers to stream eth data from a vulcanizedb super node
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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/vulcanize/vulcanizedb/pkg/eth/core"
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"github.com/vulcanize/vulcanizedb/pkg/super_node"
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"github.com/vulcanize/vulcanizedb/pkg/super_node/shared"
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)
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// ISuperNodeStreamer is the interface for streaming SuperNodePayloads from a vulcanizeDB super node
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type ISuperNodeStreamer interface {
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Stream(payloadChan chan super_node.SubscriptionPayload, params shared.SubscriptionSettings) (*rpc.ClientSubscription, error)
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}
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// SuperNodeStreamer is the underlying struct for the ISuperNodeStreamer interface
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type SuperNodeStreamer struct {
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Client core.RPCClient
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}
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// NewSuperNodeStreamer creates a pointer to a new SuperNodeStreamer which satisfies the ISuperNodeStreamer interface
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func NewSuperNodeStreamer(client core.RPCClient) *SuperNodeStreamer {
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return &SuperNodeStreamer{
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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 a vulcanizedb super node
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func (sds *SuperNodeStreamer) Stream(payloadChan chan super_node.SubscriptionPayload, params shared.SubscriptionSettings) (*rpc.ClientSubscription, error) {
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return sds.Client.Subscribe("vdb", payloadChan, "stream", params)
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}
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