github.com/ethw3/go-ethereuma@v0.0.0-20221013053120-c14602a4c23c/trie/node_enc.go (about)

     1  // Copyright 2022 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 trie
    18  
    19  import (
    20  	"github.com/ethw3/go-ethereuma/rlp"
    21  )
    22  
    23  func nodeToBytes(n node) []byte {
    24  	w := rlp.NewEncoderBuffer(nil)
    25  	n.encode(w)
    26  	result := w.ToBytes()
    27  	w.Flush()
    28  	return result
    29  }
    30  
    31  func (n *fullNode) encode(w rlp.EncoderBuffer) {
    32  	offset := w.List()
    33  	for _, c := range n.Children {
    34  		if c != nil {
    35  			c.encode(w)
    36  		} else {
    37  			w.Write(rlp.EmptyString)
    38  		}
    39  	}
    40  	w.ListEnd(offset)
    41  }
    42  
    43  func (n *shortNode) encode(w rlp.EncoderBuffer) {
    44  	offset := w.List()
    45  	w.WriteBytes(n.Key)
    46  	if n.Val != nil {
    47  		n.Val.encode(w)
    48  	} else {
    49  		w.Write(rlp.EmptyString)
    50  	}
    51  	w.ListEnd(offset)
    52  }
    53  
    54  func (n hashNode) encode(w rlp.EncoderBuffer) {
    55  	w.WriteBytes(n)
    56  }
    57  
    58  func (n valueNode) encode(w rlp.EncoderBuffer) {
    59  	w.WriteBytes(n)
    60  }
    61  
    62  func (n rawFullNode) encode(w rlp.EncoderBuffer) {
    63  	offset := w.List()
    64  	for _, c := range n {
    65  		if c != nil {
    66  			c.encode(w)
    67  		} else {
    68  			w.Write(rlp.EmptyString)
    69  		}
    70  	}
    71  	w.ListEnd(offset)
    72  }
    73  
    74  func (n *rawShortNode) encode(w rlp.EncoderBuffer) {
    75  	offset := w.List()
    76  	w.WriteBytes(n.Key)
    77  	if n.Val != nil {
    78  		n.Val.encode(w)
    79  	} else {
    80  		w.Write(rlp.EmptyString)
    81  	}
    82  	w.ListEnd(offset)
    83  }
    84  
    85  func (n rawNode) encode(w rlp.EncoderBuffer) {
    86  	w.Write(n)
    87  }