124 lines
3.0 KiB
Nim
124 lines
3.0 KiB
Nim
## Nim-Dagger
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## Copyright (c) 2022 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 std/os
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import std/strformat
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import pkg/libp2p
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import pkg/chronos
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import pkg/chronicles
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import pkg/stew/io2
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import pkg/questionable
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import pkg/questionable/results
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import ../errors
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import ../formats
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import ./stpproto
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import ./por
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type
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StpStore* = object
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authDir*: string
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postfixLen*: int
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template stpPath*(self: StpStore, cid: Cid): string =
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self.authDir / ($cid)[^self.postfixLen..^1] / $cid
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proc retrieve*(
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self: StpStore,
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cid: Cid): Future[?!PorMessage] {.async.} =
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## Retrieve authenticators from data store
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##
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let path = self.stpPath(cid) / "por"
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var data: seq[byte]
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if (
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let res = io2.readFile(path, data);
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res.isErr):
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let error = io2.ioErrorMsg(res.error)
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trace "Cannot retrieve storage proof data from fs", path , error
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return failure("Cannot retrieve storage proof data from fs")
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return PorMessage.decode(data).mapFailure
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proc store*(
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self: StpStore,
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por: PorMessage,
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cid: Cid): Future[?!void] {.async.} =
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## Persist storage proofs
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##
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let
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dir = self.stpPath(cid)
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if io2.createPath(dir).isErr:
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trace "Unable to create storage proofs prefix dir", dir
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return failure(&"Unable to create storage proofs prefix dir ${dir}")
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let path = dir / "por"
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if (
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let res = io2.writeFile(path, por.encode());
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res.isErr):
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let error = io2.ioErrorMsg(res.error)
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trace "Unable to store storage proofs", path, cid, error
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return failure(
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&"Unable to store storage proofs - path = ${path} cid = ${cid} error = ${error}")
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return success()
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proc retrieve*(
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self: StpStore,
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cid: Cid,
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blocks: seq[int]): Future[?!seq[Tag]] {.async.} =
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var tags: seq[Tag]
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for b in blocks:
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var tag = Tag(idx: b)
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let path = self.stpPath(cid) / $b
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if (
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let res = io2.readFile(path, tag.tag);
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res.isErr):
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let error = io2.ioErrorMsg(res.error)
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trace "Cannot retrieve tags from fs", path , error
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return failure("Cannot retrieve tags from fs")
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tags.add(tag)
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return tags.success
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proc store*(
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self: StpStore,
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tags: seq[Tag],
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cid: Cid): Future[?!void] {.async.} =
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let
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dir = self.stpPath(cid)
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if io2.createPath(dir).isErr:
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trace "Unable to create storage proofs prefix dir", dir
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return failure(&"Unable to create storage proofs prefix dir ${dir}")
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for t in tags:
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let path = dir / $t.idx
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if (
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let res = io2.writeFile(path, t.tag);
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res.isErr):
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let error = io2.ioErrorMsg(res.error)
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trace "Unable to store tags", path, cid, error
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return failure(
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&"Unable to store tags - path = ${path} cid = ${cid} error = ${error}")
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return success()
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proc init*(
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T: type StpStore,
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authDir: string,
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postfixLen: int = 2): StpStore =
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T(
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authDir: authDir,
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postfixLen: postfixLen)
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