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trie: remove dependency on package crypto

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Package crypto needs cgo, which is inconvenient for some build
configurations.
This commit is contained in:
Felix Lange 2016-09-29 16:51:04 +02:00
parent 4e8cec05ab
commit ba8c4c6b1a
1 changed files with 6 additions and 3 deletions
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9
trie/trie.go
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@ -22,7 +22,7 @@ import (
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/crypto/sha3"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
)
@ -30,11 +30,14 @@ import (
var (
// This is the known root hash of an empty trie.
emptyRoot = common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
// This is the known hash of an empty state trie entry.
emptyState = crypto.Keccak256Hash(nil)
emptyState common.Hash
)
func init() {
sha3.NewKeccak256().Sum(emptyState[:0])
}
// Database must be implemented by backing stores for the trie.
type Database interface {
DatabaseWriter