github.com/theQRL/go-zond@v0.1.1/internal/blocktest/test_hash.go (about)

     1  // Copyright 2023 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  // Package utesting provides a standalone replacement for package testing.
    18  //
    19  // This package exists because package testing cannot easily be embedded into a
    20  // standalone go program. It provides an API that mirrors the standard library
    21  // testing API.
    22  
    23  package blocktest
    24  
    25  import (
    26  	"hash"
    27  
    28  	"github.com/theQRL/go-zond/common"
    29  	"golang.org/x/crypto/sha3"
    30  )
    31  
    32  // testHasher is the helper tool for transaction/receipt list hashing.
    33  // The original hasher is trie, in order to get rid of import cycle,
    34  // use the testing hasher instead.
    35  type testHasher struct {
    36  	hasher hash.Hash
    37  }
    38  
    39  // NewHasher returns a new testHasher instance.
    40  func NewHasher() *testHasher {
    41  	return &testHasher{hasher: sha3.NewLegacyKeccak256()}
    42  }
    43  
    44  // Reset resets the hash state.
    45  func (h *testHasher) Reset() {
    46  	h.hasher.Reset()
    47  }
    48  
    49  // Update updates the hash state with the given key and value.
    50  func (h *testHasher) Update(key, val []byte) error {
    51  	h.hasher.Write(key)
    52  	h.hasher.Write(val)
    53  	return nil
    54  }
    55  
    56  // Hash returns the hash value.
    57  func (h *testHasher) Hash() common.Hash {
    58  	return common.BytesToHash(h.hasher.Sum(nil))
    59  }