149 lines
3.8 KiB
Nim
149 lines
3.8 KiB
Nim
## Nim-Codex
|
|
## Copyright (c) 2021 Status Research & Development GmbH
|
|
## Licensed under either of
|
|
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
|
|
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
|
|
## at your option.
|
|
## This file may not be copied, modified, or distributed except according to
|
|
## those terms.
|
|
|
|
import pkg/upraises
|
|
|
|
push: {.upraises: [].}
|
|
|
|
import std/sugar
|
|
|
|
import pkg/chronicles
|
|
import pkg/chronos
|
|
import pkg/libp2p
|
|
|
|
import ../blocktype
|
|
import ../utils/asyncheapqueue
|
|
import ../utils/asynciter
|
|
import ../clock
|
|
|
|
import ./blockstore
|
|
import ../blockexchange
|
|
import ../merkletree
|
|
import ../blocktype
|
|
|
|
export blockstore, blockexchange, asyncheapqueue
|
|
|
|
logScope:
|
|
topics = "codex networkstore"
|
|
|
|
const BlockPrefetchAmount = 5
|
|
|
|
type
|
|
NetworkStore* = ref object of BlockStore
|
|
engine*: BlockExcEngine # blockexc decision engine
|
|
localStore*: BlockStore # local block store
|
|
|
|
method getBlock*(self: NetworkStore, address: BlockAddress): Future[?!Block] {.async.} =
|
|
trace "Getting block from local store or network", address
|
|
|
|
without blk =? await self.localStore.getBlock(address), error:
|
|
if not (error of BlockNotFoundError): return failure error
|
|
trace "Block not in local store", address
|
|
|
|
without newBlock =? (await self.engine.requestBlock(address)).catch, error:
|
|
trace "Unable to get block from exchange engine", address
|
|
return failure error
|
|
|
|
return success newBlock
|
|
|
|
return success blk
|
|
|
|
method getBlock*(self: NetworkStore, cid: Cid): Future[?!Block] =
|
|
## Get a block from the blockstore
|
|
##
|
|
|
|
self.getBlock(BlockAddress.init(cid))
|
|
|
|
method getBlock*(self: NetworkStore, treeCid: Cid, index: Natural): Future[?!Block] =
|
|
## Get a block from the blockstore
|
|
##
|
|
|
|
self.getBlock(BlockAddress.init(treeCid, index))
|
|
|
|
method putBlock*(
|
|
self: NetworkStore,
|
|
blk: Block,
|
|
ttl = Duration.none
|
|
): Future[?!void] {.async.} =
|
|
## Store block locally and notify the network
|
|
##
|
|
|
|
trace "Puting block into network store", cid = blk.cid
|
|
|
|
let res = await self.localStore.putBlock(blk, ttl)
|
|
if res.isErr:
|
|
return res
|
|
|
|
await self.engine.resolveBlocks(@[blk])
|
|
return success()
|
|
|
|
method putBlockCidAndProof*(
|
|
self: NetworkStore,
|
|
treeCid: Cid,
|
|
index: Natural,
|
|
blockCid: Cid,
|
|
proof: MerkleProof
|
|
): Future[?!void] =
|
|
self.localStore.putBlockCidAndProof(treeCid, index, blockCid, proof)
|
|
|
|
method ensureExpiry*(
|
|
self: NetworkStore,
|
|
cid: Cid,
|
|
expiry: SecondsSince1970
|
|
): Future[?!void] {.async.} =
|
|
## Ensure that block's assosicated expiry is at least given timestamp
|
|
## If the current expiry is lower then it is updated to the given one, otherwise it is left intact
|
|
##
|
|
|
|
if (await self.localStore.hasBlock(cid)).tryGet:
|
|
return await self.localStore.ensureExpiry(cid, expiry)
|
|
else:
|
|
trace "Updating expiry - block not in local store", cid
|
|
|
|
return success()
|
|
|
|
method listBlocks*(
|
|
self: NetworkStore,
|
|
blockType = BlockType.Manifest): Future[?!AsyncIter[?Cid]] =
|
|
self.localStore.listBlocks(blockType)
|
|
|
|
method delBlock*(self: NetworkStore, cid: Cid): Future[?!void] =
|
|
## Delete a block from the blockstore
|
|
##
|
|
|
|
trace "Deleting block from network store", cid
|
|
return self.localStore.delBlock(cid)
|
|
|
|
{.pop.}
|
|
|
|
method hasBlock*(self: NetworkStore, cid: Cid): Future[?!bool] {.async.} =
|
|
## Check if the block exists in the blockstore
|
|
##
|
|
|
|
trace "Checking network store for block existence", cid
|
|
return await self.localStore.hasBlock(cid)
|
|
|
|
method close*(self: NetworkStore): Future[void] {.async.} =
|
|
## Close the underlying local blockstore
|
|
##
|
|
|
|
if not self.localStore.isNil:
|
|
await self.localStore.close
|
|
|
|
proc new*(
|
|
T: type NetworkStore,
|
|
engine: BlockExcEngine,
|
|
localStore: BlockStore
|
|
): NetworkStore =
|
|
## Create new instance of a NetworkStore
|
|
##
|
|
NetworkStore(
|
|
localStore: localStore,
|
|
engine: engine)
|