89 lines
2.1 KiB
Nim
89 lines
2.1 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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import pkg/upraises
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push: {.upraises: [].}
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import pkg/chronos
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import pkg/libp2p
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import pkg/questionable
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import pkg/questionable/results
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import ../blocktype
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export blocktype, libp2p
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type
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BlockNotFoundError* = object of CodexError
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BlockType* {.pure.} = enum
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Manifest, Block, Both
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GetNext* = proc(): Future[?Cid] {.upraises: [], gcsafe, closure.}
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BlocksIter* = ref object
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finished*: bool
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next*: GetNext
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BlockStore* = ref object of RootObj
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iterator items*(self: BlocksIter): Future[?Cid] =
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while not self.finished:
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yield self.next()
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method getBlock*(self: BlockStore, cid: Cid): Future[?!Block] {.base.} =
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## Get a block from the blockstore
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##
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raiseAssert("Not implemented!")
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method putBlock*(
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self: BlockStore,
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blk: Block,
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ttl = Duration.none): Future[?!void] {.base.} =
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## Put a block to the blockstore
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##
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raiseAssert("Not implemented!")
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method delBlock*(self: BlockStore, cid: Cid): Future[?!void] {.base.} =
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## Delete a block from the blockstore
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##
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raiseAssert("Not implemented!")
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method hasBlock*(self: BlockStore, cid: Cid): Future[?!bool] {.base.} =
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## Check if the block exists in the blockstore
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##
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raiseAssert("Not implemented!")
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method listBlocks*(
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self: BlockStore,
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blockType = BlockType.Manifest): Future[?!BlocksIter] {.base.} =
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## Get the list of blocks in the BlockStore. This is an intensive operation
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##
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raiseAssert("Not implemented!")
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method close*(self: BlockStore): Future[void] {.base.} =
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## Close the blockstore, cleaning up resources managed by it.
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## For some implementations this may be a no-op
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##
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raiseAssert("Not implemented!")
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proc contains*(self: BlockStore, blk: Cid): Future[bool] {.async.} =
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## Check if the block exists in the blockstore.
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## Return false if error encountered
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##
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return (await self.hasBlock(blk)) |? false
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