Official Go implementation of the Ethereum protocol
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go-ethereum/triedb/states.go

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// Copyright 2023 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 triedb
import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/triedb/pathdb"
)
// StateSet represents a collection of mutated states during a state transition.
type StateSet struct {
Accounts map[common.Hash][]byte // Mutated accounts in 'slim RLP' encoding
AccountsOrigin map[common.Address][]byte // Original values of mutated accounts in 'slim RLP' encoding
Storages map[common.Hash]map[common.Hash][]byte // Mutated storage slots in 'prefix-zero-trimmed' RLP format
StoragesOrigin map[common.Address]map[common.Hash][]byte // Original values of mutated storage slots in 'prefix-zero-trimmed' RLP format
}
// NewStateSet initializes an empty state set.
func NewStateSet() *StateSet {
return &StateSet{
Accounts: make(map[common.Hash][]byte),
AccountsOrigin: make(map[common.Address][]byte),
Storages: make(map[common.Hash]map[common.Hash][]byte),
StoragesOrigin: make(map[common.Address]map[common.Hash][]byte),
}
}
// internal returns a state set for path database internal usage.
func (set *StateSet) internal() *pathdb.StateSetWithOrigin {
// the nil state set is possible in tests.
if set == nil {
return nil
}
return pathdb.NewStateSetWithOrigin(set.AccountsOrigin, set.StoragesOrigin)
}