95 lines
3.1 KiB
Nim
95 lines
3.1 KiB
Nim
# nimbus-eth1
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# Copyright (c) 2023-2024 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
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# except according to those terms.
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## Aristo DB -- Transaction stow/save helper
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## =========================================
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##
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{.push raises: [].}
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import
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std/[options, tables],
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results,
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".."/[aristo_desc, aristo_get, aristo_journal, aristo_layers, aristo_hashify]
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# ------------------------------------------------------------------------------
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# Public functions
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# ------------------------------------------------------------------------------
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proc txStow*(
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db: AristoDbRef; # Database
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nxtFid: Option[FilterID]; # Next filter ID (zero is OK)
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persistent: bool; # Stage only unless `true`
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chunkedMpt: bool; # Partial data (e.g. from `snap`)
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): Result[void,AristoError] =
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## Worker for `stow()` and `persist()` variants.
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##
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if not db.txRef.isNil:
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return err(TxPendingTx)
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if 0 < db.stack.len:
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return err(TxStackGarbled)
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if persistent and not db.journalUpdateOk():
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return err(TxBackendNotWritable)
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# Update Merkle hashes (unless disabled)
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db.hashify().isOkOr:
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return err(error[1])
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let fwd = db.journalFwdFilter(db.top, chunkedMpt).valueOr:
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return err(error[1])
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if fwd.isValid:
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# Move/merge `top` layer onto `roFilter`
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db.journalMerge(fwd).isOkOr:
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return err(error[1])
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# Special treatment for `snap` proofs (aka `chunkedMpt`)
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let final =
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if chunkedMpt: LayerFinalRef(fRpp: db.top.final.fRpp)
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else: LayerFinalRef()
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# New empty top layer (probably with `snap` proofs and `vGen` carry over)
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db.top = LayerRef(
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delta: LayerDeltaRef(),
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final: final)
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if db.roFilter.isValid:
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db.top.final.vGen = db.roFilter.vGen
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else:
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let rc = db.getIdgUbe()
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if rc.isOk:
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db.top.final.vGen = rc.value
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else:
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# It is OK if there was no `Idg`. Otherwise something serious happened
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# and there is no way to recover easily.
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doAssert rc.error == GetIdgNotFound
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elif db.top.delta.sTab.len != 0 and
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not db.top.delta.sTab.getOrVoid(VertexID(1)).isValid:
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# Currently, a `VertexID(1)` root node is required
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return err(TxAccRootMissing)
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if persistent:
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# Merge/move `roFilter` into persistent tables
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? db.journalUpdate nxtFid
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# Special treatment for `snap` proofs (aka `chunkedMpt`)
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let final =
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if chunkedMpt: LayerFinalRef(vGen: db.vGen, fRpp: db.top.final.fRpp)
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else: LayerFinalRef(vGen: db.vGen)
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# New empty top layer (probably with `snap` proofs carry over)
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db.top = LayerRef(
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delta: LayerDeltaRef(),
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final: final,
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txUid: db.top.txUid)
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ok()
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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