781 lines
22 KiB
Nim
781 lines
22 KiB
Nim
## Nim-Codex
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## Copyright (c) 2021 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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{.push raises: [].}
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import std/options
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import std/sequtils
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import std/strformat
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import std/sugar
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import std/cpuinfo
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import pkg/questionable
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import pkg/questionable/results
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import pkg/chronos
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import pkg/poseidon2
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import pkg/libp2p/[switch, multicodec, multihash]
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import pkg/libp2p/stream/bufferstream
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# TODO: remove once exported by libp2p
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import pkg/libp2p/routing_record
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import pkg/libp2p/signed_envelope
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import pkg/taskpools
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import ./chunker
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import ./slots
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import ./clock
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import ./blocktype as bt
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import ./manifest
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import ./merkletree
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import ./stores
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import ./blockexchange
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import ./streams
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import ./erasure
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import ./discovery
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import ./contracts
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import ./indexingstrategy
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import ./utils
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import ./errors
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import ./logutils
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import ./utils/poseidon2digest
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import ./utils/asynciter
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export logutils
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logScope:
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topics = "codex node"
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const
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FetchBatch = 200
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type
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Contracts* = tuple
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client: ?ClientInteractions
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host: ?HostInteractions
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validator: ?ValidatorInteractions
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CodexNode* = object
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switch: Switch
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networkId: PeerId
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networkStore: NetworkStore
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engine: BlockExcEngine
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prover: ?Prover
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discovery: Discovery
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contracts*: Contracts
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clock*: Clock
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storage*: Contracts
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taskpool*: Taskpool
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CodexNodeRef* = ref CodexNode
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OnManifest* = proc(cid: Cid, manifest: Manifest): void {.gcsafe, raises: [].}
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BatchProc* = proc(blocks: seq[bt.Block]): Future[?!void] {.gcsafe, raises: [].}
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func switch*(self: CodexNodeRef): Switch =
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return self.switch
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func blockStore*(self: CodexNodeRef): BlockStore =
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return self.networkStore
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func engine*(self: CodexNodeRef): BlockExcEngine =
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return self.engine
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func discovery*(self: CodexNodeRef): Discovery =
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return self.discovery
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proc storeManifest*(
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self: CodexNodeRef,
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manifest: Manifest): Future[?!bt.Block] {.async.} =
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without encodedVerifiable =? manifest.encode(), err:
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trace "Unable to encode manifest"
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return failure(err)
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without blk =? bt.Block.new(data = encodedVerifiable, codec = ManifestCodec), error:
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trace "Unable to create block from manifest"
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return failure(error)
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if err =? (await self.networkStore.putBlock(blk)).errorOption:
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trace "Unable to store manifest block", cid = blk.cid, err = err.msg
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return failure(err)
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success blk
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proc fetchManifest*(
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self: CodexNodeRef,
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cid: Cid): Future[?!Manifest] {.async.} =
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## Fetch and decode a manifest block
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##
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if err =? cid.isManifest.errorOption:
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return failure "CID has invalid content type for manifest {$cid}"
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trace "Retrieving manifest for cid", cid
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without blk =? await self.networkStore.getBlock(BlockAddress.init(cid)), err:
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trace "Error retrieve manifest block", cid, err = err.msg
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return failure err
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trace "Decoding manifest for cid", cid
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without manifest =? Manifest.decode(blk), err:
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trace "Unable to decode as manifest", err = err.msg
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return failure("Unable to decode as manifest")
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trace "Decoded manifest", cid
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return manifest.success
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proc findPeer*(
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self: CodexNodeRef,
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peerId: PeerId): Future[?PeerRecord] {.async.} =
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## Find peer using the discovery service from the given CodexNode
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##
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return await self.discovery.findPeer(peerId)
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proc connect*(
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self: CodexNodeRef,
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peerId: PeerId,
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addrs: seq[MultiAddress]
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): Future[void] =
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self.switch.connect(peerId, addrs)
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proc updateExpiry*(
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self: CodexNodeRef,
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manifestCid: Cid,
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expiry: SecondsSince1970): Future[?!void] {.async.} =
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without manifest =? await self.fetchManifest(manifestCid), error:
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trace "Unable to fetch manifest for cid", manifestCid
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return failure(error)
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try:
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let
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ensuringFutures = Iter[int].new(0..<manifest.blocksCount)
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.mapIt(self.networkStore.localStore.ensureExpiry( manifest.treeCid, it, expiry ))
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await allFuturesThrowing(ensuringFutures)
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except CancelledError as exc:
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raise exc
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except CatchableError as exc:
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return failure(exc.msg)
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return success()
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proc fetchBatched*(
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self: CodexNodeRef,
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cid: Cid,
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iter: Iter[int],
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batchSize = FetchBatch,
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onBatch: BatchProc = nil): Future[?!void] {.async, gcsafe.} =
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## Fetch blocks in batches of `batchSize`
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##
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# TODO: doesn't work if callee is annotated with async
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# let
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# iter = iter.map(
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# (i: int) => self.networkStore.getBlock(BlockAddress.init(cid, i))
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# )
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while not iter.finished:
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let blocks = collect:
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for i in 0..<batchSize:
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if not iter.finished:
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self.networkStore.getBlock(BlockAddress.init(cid, iter.next()))
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if blocksErr =? (await allFutureResult(blocks)).errorOption:
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return failure(blocksErr)
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if not onBatch.isNil and
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batchErr =? (await onBatch(blocks.mapIt( it.read.get ))).errorOption:
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return failure(batchErr)
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success()
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proc fetchBatched*(
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self: CodexNodeRef,
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manifest: Manifest,
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batchSize = FetchBatch,
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onBatch: BatchProc = nil): Future[?!void] =
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## Fetch manifest in batches of `batchSize`
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##
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trace "Fetching blocks in batches of", size = batchSize
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let iter = Iter[int].new(0..<manifest.blocksCount)
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self.fetchBatched(manifest.treeCid, iter, batchSize, onBatch)
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proc streamSingleBlock(
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self: CodexNodeRef,
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cid: Cid
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): Future[?!LPstream] {.async.} =
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## Streams the contents of a single block.
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##
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trace "Streaming single block", cid = cid
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let
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stream = BufferStream.new()
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without blk =? (await self.networkStore.getBlock(BlockAddress.init(cid))), err:
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return failure(err)
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proc streamOneBlock(): Future[void] {.async.} =
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try:
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await stream.pushData(blk.data)
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except CatchableError as exc:
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trace "Unable to send block", cid, exc = exc.msg
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discard
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finally:
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await stream.pushEof()
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asyncSpawn streamOneBlock()
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LPStream(stream).success
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proc streamEntireDataset(
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self: CodexNodeRef,
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manifest: Manifest,
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manifestCid: Cid,
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): Future[?!LPStream] {.async.} =
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## Streams the contents of the entire dataset described by the manifest.
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##
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trace "Retrieving blocks from manifest", manifestCid
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if manifest.protected:
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# Retrieve, decode and save to the local store all EС groups
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proc erasureJob(): Future[?!void] {.async.} =
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try:
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# Spawn an erasure decoding job
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let
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erasure = Erasure.new(
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self.networkStore,
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leoEncoderProvider,
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leoDecoderProvider,
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self.taskpool)
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without _ =? (await erasure.decode(manifest)), error:
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error "Unable to erasure decode manifest", manifestCid, exc = error.msg
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return failure(error)
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return success()
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# --------------------------------------------------------------------------
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# FIXME this is a HACK so that the node does not crash during the workshop.
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# We should NOT catch Defect.
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except Exception as exc:
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trace "Exception decoding manifest", manifestCid, exc = exc.msg
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return failure(exc.msg)
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# --------------------------------------------------------------------------
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if err =? (await erasureJob()).errorOption:
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return failure(err)
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# Retrieve all blocks of the dataset sequentially from the local store or network
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trace "Creating store stream for manifest", manifestCid
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LPStream(StoreStream.new(self.networkStore, manifest, pad = false)).success
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proc retrieve*(
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self: CodexNodeRef,
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cid: Cid,
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local: bool = true): Future[?!LPStream] {.async.} =
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## Retrieve by Cid a single block or an entire dataset described by manifest
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##
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if local and not await (cid in self.networkStore):
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return failure((ref BlockNotFoundError)(msg: "Block not found in local store"))
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without manifest =? (await self.fetchManifest(cid)), err:
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if err of AsyncTimeoutError:
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return failure(err)
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return await self.streamSingleBlock(cid)
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await self.streamEntireDataset(manifest, cid)
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proc store*(
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self: CodexNodeRef,
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stream: LPStream,
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blockSize = DefaultBlockSize): Future[?!Cid] {.async.} =
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## Save stream contents as dataset with given blockSize
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## to nodes's BlockStore, and return Cid of its manifest
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##
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info "Storing data"
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let
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hcodec = Sha256HashCodec
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dataCodec = BlockCodec
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chunker = LPStreamChunker.new(stream, chunkSize = blockSize)
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var cids: seq[Cid]
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try:
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while (
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let chunk = await chunker.getBytes();
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chunk.len > 0):
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without mhash =? MultiHash.digest($hcodec, chunk).mapFailure, err:
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return failure(err)
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without cid =? Cid.init(CIDv1, dataCodec, mhash).mapFailure, err:
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return failure(err)
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without blk =? bt.Block.new(cid, chunk, verify = false):
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return failure("Unable to init block from chunk!")
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cids.add(cid)
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if err =? (await self.networkStore.putBlock(blk)).errorOption:
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error "Unable to store block", cid = blk.cid, err = err.msg
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return failure(&"Unable to store block {blk.cid}")
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except CancelledError as exc:
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raise exc
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except CatchableError as exc:
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return failure(exc.msg)
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finally:
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await stream.close()
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without tree =? CodexTree.init(cids), err:
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return failure(err)
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without treeCid =? tree.rootCid(CIDv1, dataCodec), err:
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return failure(err)
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for index, cid in cids:
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without proof =? tree.getProof(index), err:
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return failure(err)
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if err =? (await self.networkStore.putCidAndProof(treeCid, index, cid, proof)).errorOption:
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# TODO add log here
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return failure(err)
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let manifest = Manifest.new(
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treeCid = treeCid,
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blockSize = blockSize,
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datasetSize = NBytes(chunker.offset),
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version = CIDv1,
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hcodec = hcodec,
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codec = dataCodec)
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without manifestBlk =? await self.storeManifest(manifest), err:
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error "Unable to store manifest"
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return failure(err)
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info "Stored data", manifestCid = manifestBlk.cid,
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treeCid = treeCid,
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blocks = manifest.blocksCount,
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datasetSize = manifest.datasetSize
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await self.discovery.provide(manifestBlk.cid)
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await self.discovery.provide(treeCid)
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return manifestBlk.cid.success
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proc iterateManifests*(self: CodexNodeRef, onManifest: OnManifest) {.async.} =
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without cids =? await self.networkStore.listBlocks(BlockType.Manifest):
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warn "Failed to listBlocks"
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return
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for c in cids:
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if cid =? await c:
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without blk =? await self.networkStore.getBlock(cid):
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warn "Failed to get manifest block by cid", cid
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return
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without manifest =? Manifest.decode(blk):
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warn "Failed to decode manifest", cid
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return
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onManifest(cid, manifest)
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proc setupRequest(
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self: CodexNodeRef,
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cid: Cid,
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duration: UInt256,
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proofProbability: UInt256,
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nodes: uint,
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tolerance: uint,
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reward: UInt256,
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collateral: UInt256,
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expiry: UInt256): Future[?!StorageRequest] {.async.} =
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## Setup slots for a given dataset
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##
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let
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ecK = nodes - tolerance
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ecM = tolerance
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logScope:
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cid = cid
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duration = duration
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nodes = nodes
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tolerance = tolerance
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reward = reward
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proofProbability = proofProbability
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collateral = collateral
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expiry = expiry
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ecK = ecK
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ecM = ecM
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trace "Setting up slots"
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without manifest =? await self.fetchManifest(cid), error:
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trace "Unable to fetch manifest for cid"
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return failure error
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# Erasure code the dataset according to provided parameters
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let
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erasure = Erasure.new(
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self.networkStore.localStore,
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leoEncoderProvider,
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leoDecoderProvider,
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self.taskpool)
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without encoded =? (await erasure.encode(manifest, ecK, ecM)), error:
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trace "Unable to erasure code dataset"
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return failure(error)
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without builder =? Poseidon2Builder.new(self.networkStore.localStore, encoded), err:
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trace "Unable to create slot builder"
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return failure(err)
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without verifiable =? (await builder.buildManifest()), err:
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trace "Unable to build verifiable manifest"
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return failure(err)
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without manifestBlk =? await self.storeManifest(verifiable), err:
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trace "Unable to store verifiable manifest"
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return failure(err)
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let
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verifyRoot =
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if builder.verifyRoot.isNone:
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return failure("No slots root")
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else:
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builder.verifyRoot.get.toBytes
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request = StorageRequest(
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ask: StorageAsk(
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slots: verifiable.numSlots.uint64,
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slotSize: builder.slotBytes.uint.u256,
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duration: duration,
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proofProbability: proofProbability,
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reward: reward,
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collateral: collateral,
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maxSlotLoss: tolerance
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),
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content: StorageContent(
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cid: $manifestBlk.cid, # TODO: why string?
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merkleRoot: verifyRoot
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),
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expiry: expiry
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)
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trace "Request created", request = $request
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success request
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proc requestStorage*(
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self: CodexNodeRef,
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cid: Cid,
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duration: UInt256,
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proofProbability: UInt256,
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nodes: uint,
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tolerance: uint,
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reward: UInt256,
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collateral: UInt256,
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expiry: UInt256): Future[?!PurchaseId] {.async.} =
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## Initiate a request for storage sequence, this might
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## be a multistep procedure.
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##
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logScope:
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cid = cid
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duration = duration
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nodes = nodes
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tolerance = tolerance
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reward = reward
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proofProbability = proofProbability
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collateral = collateral
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expiry = expiry.truncate(int64)
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now = self.clock.now
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trace "Received a request for storage!"
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without contracts =? self.contracts.client:
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trace "Purchasing not available"
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return failure "Purchasing not available"
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without request =?
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(await self.setupRequest(
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cid,
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duration,
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proofProbability,
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nodes,
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tolerance,
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reward,
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collateral,
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expiry)), err:
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trace "Unable to setup request"
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return failure err
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let purchase = await contracts.purchasing.purchase(request)
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success purchase.id
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proc onStore(
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self: CodexNodeRef,
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request: StorageRequest,
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slotIdx: UInt256,
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blocksCb: BlocksCb): Future[?!void] {.async.} =
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## store data in local storage
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##
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logScope:
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cid = request.content.cid
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slotIdx = slotIdx
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trace "Received a request to store a slot"
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without cid =? Cid.init(request.content.cid).mapFailure, err:
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trace "Unable to parse Cid", cid
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return failure(err)
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without manifest =? (await self.fetchManifest(cid)), err:
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trace "Unable to fetch manifest for cid", cid, err = err.msg
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return failure(err)
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without builder =? Poseidon2Builder.new(
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self.networkStore, manifest, manifest.verifiableStrategy
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), err:
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trace "Unable to create slots builder", err = err.msg
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return failure(err)
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let
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slotIdx = slotIdx.truncate(int)
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expiry = request.expiry.toSecondsSince1970
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if slotIdx > manifest.slotRoots.high:
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trace "Slot index not in manifest", slotIdx
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return failure(newException(CodexError, "Slot index not in manifest"))
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proc updateExpiry(blocks: seq[bt.Block]): Future[?!void] {.async.} =
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trace "Updating expiry for blocks", blocks = blocks.len
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let ensureExpiryFutures = blocks.mapIt(self.networkStore.ensureExpiry(it.cid, expiry))
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if updateExpiryErr =? (await allFutureResult(ensureExpiryFutures)).errorOption:
|
||
return failure(updateExpiryErr)
|
||
|
||
if not blocksCb.isNil and err =? (await blocksCb(blocks)).errorOption:
|
||
trace "Unable to process blocks", err = err.msg
|
||
return failure(err)
|
||
|
||
return success()
|
||
|
||
without indexer =? manifest.verifiableStrategy.init(
|
||
0, manifest.blocksCount - 1, manifest.numSlots).catch, err:
|
||
trace "Unable to create indexing strategy from protected manifest", err = err.msg
|
||
return failure(err)
|
||
|
||
without blksIter =? indexer.getIndicies(slotIdx).catch, err:
|
||
trace "Unable to get indicies from strategy", err = err.msg
|
||
return failure(err)
|
||
|
||
if err =? (await self.fetchBatched(
|
||
manifest.treeCid,
|
||
blksIter,
|
||
onBatch = updateExpiry)).errorOption:
|
||
trace "Unable to fetch blocks", err = err.msg
|
||
return failure(err)
|
||
|
||
without slotRoot =? (await builder.buildSlot(slotIdx.Natural)), err:
|
||
trace "Unable to build slot", err = err.msg
|
||
return failure(err)
|
||
|
||
trace "Slot successfully retrieved and reconstructed"
|
||
|
||
if cid =? slotRoot.toSlotCid() and cid != manifest.slotRoots[slotIdx.int]:
|
||
trace "Slot root mismatch", manifest = manifest.slotRoots[slotIdx.int], recovered = slotRoot.toSlotCid()
|
||
return failure(newException(CodexError, "Slot root mismatch"))
|
||
|
||
trace "Slot successfully retrieved and reconstructed"
|
||
|
||
return success()
|
||
|
||
proc onProve(
|
||
self: CodexNodeRef,
|
||
slot: Slot,
|
||
challenge: ProofChallenge): Future[?!Groth16Proof] {.async.} =
|
||
## Generats a proof for a given slot and challenge
|
||
##
|
||
|
||
let
|
||
cidStr = slot.request.content.cid
|
||
slotIdx = slot.slotIndex.truncate(Natural)
|
||
|
||
logScope:
|
||
cid = cidStr
|
||
slot = slotIdx
|
||
challenge = challenge
|
||
|
||
trace "Received proof challenge"
|
||
|
||
if prover =? self.prover:
|
||
trace "Prover enabled"
|
||
|
||
without cid =? Cid.init(cidStr).mapFailure, err:
|
||
error "Unable to parse Cid", cid, err = err.msg
|
||
return failure(err)
|
||
|
||
without manifest =? await self.fetchManifest(cid), err:
|
||
error "Unable to fetch manifest for cid", err = err.msg
|
||
return failure(err)
|
||
|
||
when defined(verify_circuit):
|
||
without (inputs, proof) =? await prover.prove(slotIdx, manifest, challenge), err:
|
||
error "Unable to generate proof", err = err.msg
|
||
return failure(err)
|
||
|
||
without checked =? await prover.verify(proof, inputs), err:
|
||
error "Unable to verify proof", err = err.msg
|
||
return failure(err)
|
||
|
||
if not checked:
|
||
error "Proof verification failed"
|
||
return failure("Proof verification failed")
|
||
|
||
trace "Proof verified successfully"
|
||
else:
|
||
without (_, proof) =? await prover.prove(slotIdx, manifest, challenge), err:
|
||
error "Unable to generate proof", err = err.msg
|
||
return failure(err)
|
||
|
||
let groth16Proof = proof.toGroth16Proof()
|
||
trace "Proof generated successfully", groth16Proof
|
||
|
||
success groth16Proof
|
||
else:
|
||
warn "Prover not enabled"
|
||
failure "Prover not enabled"
|
||
|
||
proc onExpiryUpdate(
|
||
self: CodexNodeRef,
|
||
rootCid: string,
|
||
expiry: SecondsSince1970): Future[?!void] {.async.} =
|
||
without cid =? Cid.init(rootCid):
|
||
trace "Unable to parse Cid", cid
|
||
let error = newException(CodexError, "Unable to parse Cid")
|
||
return failure(error)
|
||
|
||
return await self.updateExpiry(cid, expiry)
|
||
|
||
proc onClear(
|
||
self: CodexNodeRef,
|
||
request: StorageRequest,
|
||
slotIndex: UInt256) =
|
||
# TODO: remove data from local storage
|
||
discard
|
||
|
||
proc start*(self: CodexNodeRef) {.async.} =
|
||
if not self.engine.isNil:
|
||
await self.engine.start()
|
||
|
||
if not self.discovery.isNil:
|
||
await self.discovery.start()
|
||
|
||
if not self.clock.isNil:
|
||
await self.clock.start()
|
||
|
||
if hostContracts =? self.contracts.host:
|
||
hostContracts.sales.onStore =
|
||
proc(
|
||
request: StorageRequest,
|
||
slot: UInt256,
|
||
onBatch: BatchProc): Future[?!void] = self.onStore(request, slot, onBatch)
|
||
|
||
hostContracts.sales.onExpiryUpdate =
|
||
proc(rootCid: string, expiry: SecondsSince1970): Future[?!void] =
|
||
self.onExpiryUpdate(rootCid, expiry)
|
||
|
||
hostContracts.sales.onClear =
|
||
proc(request: StorageRequest, slotIndex: UInt256) =
|
||
# TODO: remove data from local storage
|
||
self.onClear(request, slotIndex)
|
||
|
||
hostContracts.sales.onProve =
|
||
proc(slot: Slot, challenge: ProofChallenge): Future[?!Groth16Proof] =
|
||
# TODO: generate proof
|
||
self.onProve(slot, challenge)
|
||
|
||
try:
|
||
await hostContracts.start()
|
||
except CancelledError as error:
|
||
raise error
|
||
except CatchableError as error:
|
||
error "Unable to start host contract interactions", error=error.msg
|
||
self.contracts.host = HostInteractions.none
|
||
|
||
if clientContracts =? self.contracts.client:
|
||
try:
|
||
await clientContracts.start()
|
||
except CancelledError as error:
|
||
raise error
|
||
except CatchableError as error:
|
||
error "Unable to start client contract interactions: ", error=error.msg
|
||
self.contracts.client = ClientInteractions.none
|
||
|
||
if validatorContracts =? self.contracts.validator:
|
||
try:
|
||
await validatorContracts.start()
|
||
except CancelledError as error:
|
||
raise error
|
||
except CatchableError as error:
|
||
error "Unable to start validator contract interactions: ", error=error.msg
|
||
self.contracts.validator = ValidatorInteractions.none
|
||
|
||
self.networkId = self.switch.peerInfo.peerId
|
||
notice "Started codex node", id = self.networkId, addrs = self.switch.peerInfo.addrs
|
||
|
||
proc stop*(self: CodexNodeRef) {.async.} =
|
||
trace "Stopping node"
|
||
|
||
if not self.engine.isNil:
|
||
await self.engine.stop()
|
||
|
||
if not self.discovery.isNil:
|
||
await self.discovery.stop()
|
||
|
||
if not self.clock.isNil:
|
||
await self.clock.stop()
|
||
|
||
if clientContracts =? self.contracts.client:
|
||
await clientContracts.stop()
|
||
|
||
if hostContracts =? self.contracts.host:
|
||
await hostContracts.stop()
|
||
|
||
if validatorContracts =? self.contracts.validator:
|
||
await validatorContracts.stop()
|
||
|
||
if not self.networkStore.isNil:
|
||
await self.networkStore.close
|
||
|
||
proc new*(
|
||
T: type CodexNodeRef,
|
||
switch: Switch,
|
||
networkStore: NetworkStore,
|
||
engine: BlockExcEngine,
|
||
discovery: Discovery,
|
||
prover = Prover.none,
|
||
contracts = Contracts.default,
|
||
taskpool = Taskpool.new(num_threads = countProcessors())): CodexNodeRef =
|
||
## Create new instance of a Codex self, call `start` to run it
|
||
##
|
||
|
||
CodexNodeRef(
|
||
switch: switch,
|
||
networkStore: networkStore,
|
||
engine: engine,
|
||
prover: prover,
|
||
discovery: discovery,
|
||
contracts: contracts,
|
||
taskpool: taskpool)
|