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trie: remove dead code (#20405)

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gary rong 2019-11-28 18:47:35 +08:00 committed by Péter Szilágyi
parent 9a529d64d1
commit 08611cfd75
1 changed files with 0 additions and 14 deletions
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14
trie/database.go
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@ -17,7 +17,6 @@
package trie package trie
import ( import (
"encoding/binary"
"errors" "errors"
"fmt" "fmt"
"io" "io"
@ -272,19 +271,6 @@ func expandNode(hash hashNode, n node) node {
} }
} }
// trienodeHasher is a struct to be used with BigCache, which uses a Hasher to
// determine which shard to place an entry into. It's not a cryptographic hash,
// just to provide a bit of anti-collision (default is FNV64a).
//
// Since trie keys are already hashes, we can just use the key directly to
// map shard id.
type trienodeHasher struct{}
// Sum64 implements the bigcache.Hasher interface.
func (t trienodeHasher) Sum64(key string) uint64 {
return binary.BigEndian.Uint64([]byte(key))
}
// NewDatabase creates a new trie database to store ephemeral trie content before // NewDatabase creates a new trie database to store ephemeral trie content before
// its written out to disk or garbage collected. No read cache is created, so all // its written out to disk or garbage collected. No read cache is created, so all
// data retrievals will hit the underlying disk database. // data retrievals will hit the underlying disk database.