core/state: convert prefetcher to concurrent per-trie loader
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@ -125,10 +125,9 @@ func (b *SimulatedBackend) Rollback() {
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func (b *SimulatedBackend) rollback() {
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blocks, _ := core.GenerateChain(b.config, b.blockchain.CurrentBlock(), ethash.NewFaker(), b.database, 1, func(int, *core.BlockGen) {})
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stateDB, _ := b.blockchain.State()
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b.pendingBlock = blocks[0]
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b.pendingState, _ = state.New(b.pendingBlock.Root(), stateDB.Database(), nil)
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b.pendingState, _ = state.New(b.pendingBlock.Root(), b.blockchain.StateCache(), nil)
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}
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// stateByBlockNumber retrieves a state by a given blocknumber.
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