60 lines
1.8 KiB
Go
60 lines
1.8 KiB
Go
// Copyright 2023 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package utesting provides a standalone replacement for package testing.
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//
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// This package exists because package testing cannot easily be embedded into a
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// standalone go program. It provides an API that mirrors the standard library
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// testing API.
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package blocktest
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import (
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"hash"
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"github.com/ethereum/go-ethereum/common"
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"golang.org/x/crypto/sha3"
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)
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// testHasher is the helper tool for transaction/receipt list hashing.
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// The original hasher is trie, in order to get rid of import cycle,
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// use the testing hasher instead.
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type testHasher struct {
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hasher hash.Hash
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}
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// NewHasher returns a new testHasher instance.
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func NewHasher() *testHasher {
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return &testHasher{hasher: sha3.NewLegacyKeccak256()}
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}
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// Reset resets the hash state.
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func (h *testHasher) Reset() {
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h.hasher.Reset()
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}
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// Update updates the hash state with the given key and value.
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func (h *testHasher) Update(key, val []byte) error {
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h.hasher.Write(key)
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h.hasher.Write(val)
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return nil
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}
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// Hash returns the hash value.
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func (h *testHasher) Hash() common.Hash {
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return common.BytesToHash(h.hasher.Sum(nil))
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}
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