87 lines
2.9 KiB
Nim
87 lines
2.9 KiB
Nim
# Nimbus
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# Copyright (c) 2021-2022 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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import
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std/options,
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stew/results, chronos, chronicles,
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eth/p2p/discoveryv5/[protocol, enr],
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../../content_db,
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../wire/[portal_protocol, portal_stream, portal_protocol_config],
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./state_content,
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./state_distance
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logScope:
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topics = "portal_state"
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const
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stateProtocolId* = [byte 0x50, 0x0A]
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type StateNetwork* = ref object
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portalProtocol*: PortalProtocol
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contentDB*: ContentDB
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func setStreamTransport*(n: StateNetwork, transport: UtpDiscv5Protocol) =
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setTransport(n.portalProtocol.stream, transport)
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proc toContentIdHandler(contentKey: ByteList): Option[ContentId] =
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toContentId(contentKey)
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proc getContent*(n: StateNetwork, key: ContentKey):
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Future[Option[seq[byte]]] {.async.} =
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let
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keyEncoded = encode(key)
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contentId = toContentId(key)
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contentInRange = n.portalProtocol.inRange(contentId)
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# When the content id is in the radius range, try to look it up in the db.
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if contentInRange:
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let contentFromDB = n.contentDB.get(contentId)
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if contentFromDB.isSome():
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return contentFromDB
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let content = await n.portalProtocol.contentLookup(keyEncoded, contentId)
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if content.isNone():
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return none[seq[byte]]()
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let contentResult = content.get()
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# When content is found on the network and is in the radius range, store it.
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if content.isSome() and contentInRange:
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# TODO Add poke when working on state network
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# TODO When working on state network, make it possible to pass different
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# distance functions to store content
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n.portalProtocol.storeContent(contentId, contentResult.content)
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# TODO: for now returning bytes, ultimately it would be nice to return proper
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# domain types.
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return some(contentResult.content)
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proc validateContent(content: openArray[byte], contentKey: ByteList): bool =
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true
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proc new*(
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T: type StateNetwork,
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baseProtocol: protocol.Protocol,
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contentDB: ContentDB,
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bootstrapRecords: openArray[Record] = [],
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portalConfig: PortalProtocolConfig = defaultPortalProtocolConfig): T =
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let portalProtocol = PortalProtocol.new(
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baseProtocol, stateProtocolId, contentDB,
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toContentIdHandler, validateContent,
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bootstrapRecords, stateDistanceCalculator, config = portalConfig)
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return StateNetwork(portalProtocol: portalProtocol, contentDB: contentDB)
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proc start*(n: StateNetwork) =
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info "Starting Portal execution state network",
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protocolId = n.portalProtocol.protocolId
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n.portalProtocol.start()
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proc stop*(n: StateNetwork) =
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n.portalProtocol.stop()
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