mirror of
https://github.com/codex-storage/nim-codex.git
synced 2025-01-10 04:55:40 +00:00
3d823dcbc6
change return type for `method getBlock` from `Future[?!(?Block)]` to `Future[?!Block]` use `type BlockNotFoundError = object of CodexError` to differentiate between "block not found in the store" and other errors also make some logic and error handling/messages more consistent across BlockStore implementations closes #177 closes #182 closes #210 alternative to #205, #209
65 lines
1.5 KiB
Nim
65 lines
1.5 KiB
Nim
import std/options
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import pkg/chronos
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import pkg/libp2p
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import pkg/libp2p/varint
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import pkg/codex/blocktype as bt
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import pkg/codex/stores
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import pkg/codex/manifest
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import pkg/codex/rng
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import ./helpers/nodeutils
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import ./helpers/randomchunker
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import ./helpers/mockdiscovery
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import ./helpers/eventually
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export randomchunker, nodeutils, mockdiscovery, eventually
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# NOTE: The meaning of equality for blocks
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# is changed here, because blocks are now `ref`
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# types. This is only in tests!!!
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func `==`*(a, b: bt.Block): bool =
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(a.cid == b.cid) and (a.data == b.data)
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proc lenPrefix*(msg: openArray[byte]): seq[byte] =
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## Write `msg` with a varint-encoded length prefix
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##
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let vbytes = PB.toBytes(msg.len().uint64)
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var buf = newSeqUninitialized[byte](msg.len() + vbytes.len)
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buf[0..<vbytes.len] = vbytes.toOpenArray()
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buf[vbytes.len..<buf.len] = msg
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return buf
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proc corruptBlocks*(
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store: BlockStore,
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manifest: Manifest,
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blks, bytes: int): Future[seq[int]] {.async.} =
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var pos: seq[int]
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while true:
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if pos.len >= blks:
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break
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var i = -1
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if (i = Rng.instance.rand(manifest.len - 1); pos.find(i) >= 0):
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continue
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pos.add(i)
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var
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blk = (await store.getBlock(manifest[i])).tryGet()
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bytePos: seq[int]
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while true:
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if bytePos.len > bytes:
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break
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var ii = -1
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if (ii = Rng.instance.rand(blk.data.len - 1); bytePos.find(ii) >= 0):
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continue
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bytePos.add(ii)
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blk.data[ii] = byte 0
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return pos
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