52 lines
1.8 KiB
Go
52 lines
1.8 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 super_node
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import (
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"math/big"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/vulcanize/vulcanizedb/pkg/super_node/config"
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)
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// Subscription holds the information for an individual client subscription to the super node
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type Subscription struct {
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ID rpc.ID
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PayloadChan chan<- Payload
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QuitChan chan<- bool
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}
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// Payload is the struct for a super node stream payload
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// It carries data of a type specific to the chain being supported/queried and an error message
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type Payload struct {
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Data interface{} `json:"data"` // e.g. for Ethereum eth.StreamPayload
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Err string `json:"err"`
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}
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// SubscriptionSettings is the interface every subscription filter type needs to satisfy, no matter the chain
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// Further specifics of the underlying filter type depend on the internal needs of the types
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// which satisfy the ResponseFilterer and CIDRetriever interfaces for a specific chain
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// The underlying type needs to be rlp serializable
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type SubscriptionSettings interface {
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StartingBlock() *big.Int
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EndingBlock() *big.Int
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ChainType() config.ChainType
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HistoricalData() bool
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HistoricalDataOnly() bool
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}
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