trie: remove dependency on package crypto
Package crypto needs cgo, which is inconvenient for some build configurations.
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@ -22,7 +22,7 @@ import (
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"fmt"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/crypto/sha3"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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)
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@ -30,11 +30,14 @@ import (
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var (
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// This is the known root hash of an empty trie.
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emptyRoot = common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
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// This is the known hash of an empty state trie entry.
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emptyState = crypto.Keccak256Hash(nil)
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emptyState common.Hash
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)
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func init() {
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sha3.NewKeccak256().Sum(emptyState[:0])
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}
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// Database must be implemented by backing stores for the trie.
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type Database interface {
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DatabaseWriter
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