mirror of
https://github.com/logos-storage/logos-storage-nim.git
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49 lines
1.8 KiB
Nim
49 lines
1.8 KiB
Nim
## Logos Storage
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## Copyright (c) 2026 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/chronos
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import ../../units
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import ../../storagetypes
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const
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# if it hangs longer than this, skip peer and continue
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DefaultWantHaveSendTimeout* = 30.seconds
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# message size limits for protobuf control messages
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MaxMessageSize*: uint32 = 16.MiBs.uint32
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TargetBatchBytes*: uint32 = 1024 * 1024
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MinBatchSize*: uint32 = 1
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MaxMetadataSize*: uint32 = 4 * 1024 * 1024
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MaxWantBlocksResponseBytes*: uint32 = 4 + MaxMetadataSize + TargetBatchBytes
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MaxBlocksPerBatch*: uint32 = TargetBatchBytes div MinBlockSize.uint32
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# the worst case which is alternating missing blocks (0,2,4...) creates max ranges
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# each range costs 16 bytes (start:u64 + count:u64)
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MaxWantBlocksRequestBytes*: uint32 = (MaxBlocksPerBatch div 2) * 16 + 1024
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static:
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doAssert MinBatchSize >= 1, "MinBatchSize must be positive"
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doAssert MaxBlocksPerBatch == TargetBatchBytes div MinBlockSize.uint32,
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"MaxBlocksPerBatch must equal TargetBatchBytes / MinBlockSize"
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doAssert MaxWantBlocksResponseBytes == 4 + MaxMetadataSize + TargetBatchBytes,
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"MaxWantBlocksResponseBytes must equal 4 + MaxMetadataSize + TargetBatchBytes"
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# should fit worst case sparse batch - max ranges
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const
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worstCaseRanges = MaxBlocksPerBatch div 2
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worstCaseRangeBytes = worstCaseRanges * 16
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fixedOverhead = 64'u32 # request id + cidLen + cid + rangeCount
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doAssert MaxWantBlocksRequestBytes >= worstCaseRangeBytes + fixedOverhead,
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"MaxWantBlocksRequestBytes too small for worst case sparse batch"
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