52 lines
1.7 KiB
Nim
52 lines
1.7 KiB
Nim
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# Nimbus
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# Copyright (c) 2021-2024 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) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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import
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std/sequtils,
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eth/common
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# ------------------------------------------------------------------------------
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# Public helpers
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# ------------------------------------------------------------------------------
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proc startAt*(
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h: openArray[BlockHeader];
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b: openArray[BlockBody];
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start: uint64;
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): (seq[BlockHeader],seq[BlockBody]) =
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## Filter out blocks with smaller `blockNumber`
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if start.toBlockNumber <= h[0].blockNumber:
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return (h.toSeq,b.toSeq)
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if start.toBlockNumber <= h[^1].blockNumber:
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# There are at least two headers, find the least acceptable one
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var n = 1
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while h[n].blockNumber < start.toBlockNumber:
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n.inc
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return (h[n ..< h.len], b[n ..< b.len])
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proc stopAfter*(
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h: openArray[BlockHeader];
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b: openArray[BlockBody];
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last: uint64;
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): (seq[BlockHeader],seq[BlockBody]) =
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## Filter out blocks with larger `blockNumber`
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if h[^1].blockNumber <= last.toBlockNumber:
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return (h.toSeq,b.toSeq)
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if h[0].blockNumber <= last.toBlockNumber:
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# There are at least two headers, find the last acceptable one
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var n = 1
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while h[n].blockNumber <= last.toBlockNumber:
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n.inc
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return (h[0 ..< n], b[0 ..< n])
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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