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https://github.com/ethereum/go-ethereum.git
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3a754099bf
## Why this should be merged Allows for a drop-in replacement of `snapshot.Tree` (i.e. one that uses block hashes instead of state roots). This is intended as a temporary solution while we investigate having the state root affected by the block hash to remove path ambiguity. ## How this works Introduction of: 1. `state.SnapshotTree` interface to match methods required on `snapshot.Tree` as used by `state.StateDB`; and 2. `stateconf` package for variadic options plumbed by `StateDB.Commit()` through to `SnapshotTree.Update()`. Although variadic (to maintain function call-signature compatibility) only the `stateconf.WithUpdatePayload(any)` is expected to be used. Recipients of the options can access the payload with `stateconf.ExtractUpdatePayload()`. ## How this was tested Unit test demonstrating propagation of `stateconf.UpdateOption` payload.
54 lines
1.9 KiB
Go
54 lines
1.9 KiB
Go
// Copyright 2024 the libevm authors.
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//
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// The libevm additions to go-ethereum are free software: you can redistribute
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// them and/or modify them under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation, either version 3 of the License,
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// or (at your option) any later version.
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//
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// The libevm additions are distributed in the hope that they will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
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// General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see
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// <http://www.gnu.org/licenses/>.
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package state
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import (
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"reflect"
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"github.com/ava-labs/libevm/common"
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"github.com/ava-labs/libevm/core/state/snapshot"
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"github.com/ava-labs/libevm/libevm/stateconf"
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)
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// SnapshotTree mirrors the functionality of a [snapshot.Tree], allowing for
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// drop-in replacements. This is intended as a temporary feature as a workaround
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// until a standard Tree can be used.
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type SnapshotTree interface {
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Cap(common.Hash, int) error
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Snapshot(common.Hash) snapshot.Snapshot
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StorageIterator(root, account, seek common.Hash) (snapshot.StorageIterator, error)
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Update(
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blockRoot common.Hash,
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parentRoot common.Hash,
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destructs map[common.Hash]struct{},
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accounts map[common.Hash][]byte,
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storage map[common.Hash]map[common.Hash][]byte,
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opts ...stateconf.SnapshotUpdateOption,
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) error
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}
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var _ SnapshotTree = (*snapshot.Tree)(nil)
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// clearTypedNilPointer returns nil if `snaps == nil` or if it holds a nil
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// pointer. The default geth behaviour expected a [snapshot.Tree] pointer
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// instead of a SnapshotTree interface, which could result in typed-nil bugs.
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func clearTypedNilPointer(snaps SnapshotTree) SnapshotTree {
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if v := reflect.ValueOf(snaps); v.Kind() == reflect.Pointer && v.IsNil() {
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return nil
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}
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return snaps
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}
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