github.com/klaytn/klaytn@v1.12.1/blockchain/state/transient_storage.go (about)

     1  // Modifications Copyright 2018 The klaytn Authors
     2  // Copyright 2022 The go-ethereum Authors
     3  // This file is part of the go-ethereum library.
     4  //
     5  // The go-ethereum library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Lesser General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // The go-ethereum library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  // GNU Lesser General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public License
    16  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    17  //
    18  // This file is derived from core/state/transient_storage.go (2023/10/06).
    19  // Modified and improved for the klaytn development.
    20  
    21  package state
    22  
    23  import (
    24  	"github.com/klaytn/klaytn/common"
    25  )
    26  
    27  // transientStorage is a representation of EIP-1153 "Transient Storage".
    28  type transientStorage map[common.Address]Storage
    29  
    30  // newTransientStorage creates a new instance of a transientStorage.
    31  func newTransientStorage() transientStorage {
    32  	return make(transientStorage)
    33  }
    34  
    35  // Set sets the transient-storage `value` for `key` at the given `addr`.
    36  func (t transientStorage) Set(addr common.Address, key, value common.Hash) {
    37  	if _, ok := t[addr]; !ok {
    38  		t[addr] = make(Storage)
    39  	}
    40  	t[addr][key] = value
    41  }
    42  
    43  // Get gets the transient storage for `key` at the given `addr`.
    44  func (t transientStorage) Get(addr common.Address, key common.Hash) common.Hash {
    45  	val, ok := t[addr]
    46  	if !ok {
    47  		return common.Hash{}
    48  	}
    49  	return val[key]
    50  }
    51  
    52  // Copy does a deep copy of the transientStorage
    53  func (t transientStorage) Copy() transientStorage {
    54  	storage := make(transientStorage)
    55  	for key, value := range t {
    56  		storage[key] = value.Copy()
    57  	}
    58  	return storage
    59  }