github.com/tirogen/go-ethereum@v1.10.12-0.20221226051715-250cfede41b6/core/state/transient_storage.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 state
    18  
    19  import (
    20  	"github.com/tirogen/go-ethereum/common"
    21  )
    22  
    23  // transientStorage is a representation of EIP-1153 "Transient Storage".
    24  type transientStorage map[common.Address]Storage
    25  
    26  // newTransientStorage creates a new instance of a transientStorage.
    27  func newTransientStorage() transientStorage {
    28  	return make(transientStorage)
    29  }
    30  
    31  // Set sets the transient-storage `value` for `key` at the given `addr`.
    32  func (t transientStorage) Set(addr common.Address, key, value common.Hash) {
    33  	if _, ok := t[addr]; !ok {
    34  		t[addr] = make(Storage)
    35  	}
    36  	t[addr][key] = value
    37  }
    38  
    39  // Get gets the transient storage for `key` at the given `addr`.
    40  func (t transientStorage) Get(addr common.Address, key common.Hash) common.Hash {
    41  	val, ok := t[addr]
    42  	if !ok {
    43  		return common.Hash{}
    44  	}
    45  	return val[key]
    46  }
    47  
    48  // Copy does a deep copy of the transientStorage
    49  func (t transientStorage) Copy() transientStorage {
    50  	storage := make(transientStorage)
    51  	for key, value := range t {
    52  		storage[key] = value.Copy()
    53  	}
    54  	return storage
    55  }