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684cf4b5fa
* [NOD-406] Don't do ECMH operations on mempool * [NOD-406] Change NewUTXODiff(false) to NewUTXODiffWithoutMultiset * [NOD-406] Rename dClone -> clone * [NOD-406] Remove redudnant assignment * [NOD-406] Remove dag.UTXOToECMHCacheLock and make NewBlockTemplate use dag's write lock * [NOD-406] Add tests to UTXO diffs without multiset
33 lines
770 B
Go
33 lines
770 B
Go
package blockdag
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import (
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"bytes"
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"github.com/daglabs/btcd/btcec"
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"github.com/daglabs/btcd/util/daghash"
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"github.com/daglabs/btcd/wire"
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"github.com/golang/groupcache/lru"
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)
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const ecmhCacheSize = 4_000_000
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var (
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utxoToECMHCache = lru.New(ecmhCacheSize)
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)
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func utxoMultiset(entry *UTXOEntry, outpoint *wire.Outpoint) (*btcec.Multiset, error) {
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w := &bytes.Buffer{}
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err := serializeUTXO(w, entry, outpoint)
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if err != nil {
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return nil, err
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}
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serializedUTXO := w.Bytes()
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utxoHash := daghash.DoubleHashH(serializedUTXO)
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if cachedMSPoint, ok := utxoToECMHCache.Get(utxoHash); ok {
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return cachedMSPoint.(*btcec.Multiset), nil
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}
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msPoint := btcec.NewMultiset(btcec.S256()).Add(serializedUTXO)
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utxoToECMHCache.Add(utxoHash, msPoint)
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return msPoint, nil
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}
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