Official Go implementation of the Ethereum protocol
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go-ethereum/core/state/transient_storage.go

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2.6 KiB

// Copyright 2022 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package state
import (
"fmt"
"slices"
"strings"
"github.com/ethereum/go-ethereum/common"
)
// transientStorage is a representation of EIP-1153 "Transient Storage".
type transientStorage map[common.Address]Storage
// newTransientStorage creates a new instance of a transientStorage.
func newTransientStorage() transientStorage {
return make(transientStorage)
}
// Set sets the transient-storage `value` for `key` at the given `addr`.
func (t transientStorage) Set(addr common.Address, key, value common.Hash) {
if value == (common.Hash{}) { // this is a 'delete'
if _, ok := t[addr]; ok {
delete(t[addr], key)
if len(t[addr]) == 0 {
delete(t, addr)
}
}
} else {
if _, ok := t[addr]; !ok {
t[addr] = make(Storage)
}
t[addr][key] = value
}
}
// Get gets the transient storage for `key` at the given `addr`.
func (t transientStorage) Get(addr common.Address, key common.Hash) common.Hash {
val, ok := t[addr]
if !ok {
return common.Hash{}
}
return val[key]
}
// Copy does a deep copy of the transientStorage
func (t transientStorage) Copy() transientStorage {
storage := make(transientStorage)
for key, value := range t {
storage[key] = value.Copy()
}
return storage
}
// PrettyPrint prints the contents of the access list in a human-readable form
func (t transientStorage) PrettyPrint() string {
out := new(strings.Builder)
var sortedAddrs []common.Address
for addr := range t {
sortedAddrs = append(sortedAddrs, addr)
slices.SortFunc(sortedAddrs, common.Address.Cmp)
}
for _, addr := range sortedAddrs {
fmt.Fprintf(out, "%#x:", addr)
var sortedKeys []common.Hash
storage := t[addr]
for key := range storage {
sortedKeys = append(sortedKeys, key)
}
slices.SortFunc(sortedKeys, common.Hash.Cmp)
for _, key := range sortedKeys {
fmt.Fprintf(out, " %X : %X\n", key, storage[key])
}
}
return out.String()
}