mirror of
https://github.com/status-im/nimbus-eth1.git
synced 2025-03-01 20:30:53 +00:00
3732b3f95e
Oops, level 0 was always used which needlessly increases mem usage - comes with an assortment of simplifications
114 lines
3.3 KiB
Nim
114 lines
3.3 KiB
Nim
# nimbus-eth1
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# Copyright (c) 2023-2025 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 frames helper
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## ======================================
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##
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{.push raises: [].}
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import
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results,
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./[aristo_desc, aristo_layers]
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# ------------------------------------------------------------------------------
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# Public functions
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# ------------------------------------------------------------------------------
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proc txFrameBegin*(db: AristoDbRef, parent: AristoTxRef): AristoTxRef =
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let parent = if parent == nil:
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db.txRef
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else:
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parent
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AristoTxRef(
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db: db,
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parent: parent,
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vTop: parent.vTop)
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proc baseTxFrame*(db: AristoDbRef): AristoTxRef=
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db.txRef
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proc dispose*(
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tx: AristoTxRef;
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) =
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tx[].reset()
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proc checkpoint*(
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tx: AristoTxRef;
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blockNumber: uint64;
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) =
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tx.blockNumber = Opt.some(blockNumber)
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proc txFramePersist*(
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db: AristoDbRef; # Database
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batch: PutHdlRef;
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txFrame: AristoTxRef;
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) =
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if txFrame == db.txRef and txFrame.sTab.len == 0:
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# No changes in frame - no `checkpoint` requirement - nothing to do here
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return
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let be = db.backend
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doAssert not be.isNil, "Persisting to backend requires ... a backend!"
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let lSst = SavedState(
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key: emptyRoot, # placeholder for more
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serial: txFrame.blockNumber.expect("`checkpoint` before persisting frame"))
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# Squash all changes up to the base
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if txFrame != db.txRef:
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# Consolidate the changes from the old to the new base going from the
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# bottom of the stack to avoid having to cascade each change through
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# the full stack
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assert txFrame.parent != nil
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for frame in txFrame.stack():
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if frame == db.txRef:
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continue
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mergeAndReset(db.txRef, frame)
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frame.dispose() # This will also dispose `txFrame` itself!
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# Put the now-merged contents in txFrame and make it the new base
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swap(db.txRef[], txFrame[])
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db.txRef = txFrame
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# Store structural single trie entries
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for rvid, vtx in txFrame.sTab:
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txFrame.kMap.withValue(rvid, key) do:
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be.putVtxFn(batch, rvid, vtx, key[])
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do:
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be.putVtxFn(batch, rvid, vtx, default(HashKey))
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be.putTuvFn(batch, txFrame.vTop)
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be.putLstFn(batch, lSst)
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# TODO above, we only prepare the changes to the database but don't actually
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# write them to disk - the code below that updates the frame should
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# really run after things have been written (to maintain sync betweeen
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# in-memory and on-disk state)
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# Copy back updated payloads
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for accPath, vtx in txFrame.accLeaves:
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db.accLeaves.put(accPath, vtx)
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for mixPath, vtx in txFrame.stoLeaves:
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db.stoLeaves.put(mixPath, vtx)
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txFrame.sTab.clear()
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txFrame.kMap.clear()
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txFrame.accLeaves.clear()
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txFrame.stoLeaves.clear()
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txFrame.blockNumber.reset()
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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