statedb

package
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Published: Feb 10, 2023 License: LGPL-3.0 Imports: 10 Imported by: 0

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Constants

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Variables

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Functions

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Types

type Account

type Account struct {
	Nonce    uint64
	Balance  *big.Int
	CodeHash []byte
}

Account is the Ethereum consensus representation of accounts. These objects are stored in the storage of auth module.

func NewEmptyAccount

func NewEmptyAccount() *Account

NewEmptyAccount returns an empty account.

func (Account) IsContract

func (acct Account) IsContract() bool

IsContract returns if the account contains contract code.

type ExtStateDB

type ExtStateDB interface {
	vm.StateDB
	AppendJournalEntry(JournalEntry)
}

ExtStateDB defines an extension to the interface provided by the go-ethereum codebase to support additional state transition functionalities. In particular it supports appending a new entry to the state journal through AppendJournalEntry so that the state can be reverted after running stateful precompiled contracts.

type JournalEntry

type JournalEntry interface {
	// Revert undoes the changes introduced by this journal entry.
	Revert(*StateDB)

	// Dirtied returns the Ethereum address modified by this journal entry.
	Dirtied() *common.Address
}

JournalEntry is a modification entry in the state change journal that can be Reverted on demand.

type Keeper

type Keeper interface {
	// Read methods
	GetAccount(ctx sdk.Context, addr common.Address) *Account
	GetState(ctx sdk.Context, addr common.Address, key common.Hash) common.Hash
	GetCode(ctx sdk.Context, codeHash common.Hash) []byte
	// the callback returns false to break early
	ForEachStorage(ctx sdk.Context, addr common.Address, cb func(key, value common.Hash) bool)

	// Write methods, only called by `StateDB.Commit()`
	SetAccount(ctx sdk.Context, addr common.Address, account Account) error
	SetState(ctx sdk.Context, addr common.Address, key common.Hash, value []byte)
	SetCode(ctx sdk.Context, codeHash []byte, code []byte)
	DeleteAccount(ctx sdk.Context, addr common.Address) error
}

Keeper provide underlying storage of StateDB

type StateDB

type StateDB struct {
	// contains filtered or unexported fields
}

StateDB structs within the ethereum protocol are used to store anything within the merkle trie. StateDBs take care of caching and storing nested states. It's the general query interface to retrieve: * Contracts * Accounts

func New

func New(ctx sdk.Context, keeper Keeper, txConfig TxConfig) *StateDB

New creates a new state from a given trie.

func (*StateDB) AddAddressToAccessList

func (s *StateDB) AddAddressToAccessList(addr common.Address)

AddAddressToAccessList adds the given address to the access list

func (*StateDB) AddBalance

func (s *StateDB) AddBalance(addr common.Address, amount *big.Int)

AddBalance adds amount to the account associated with addr.

func (*StateDB) AddLog

func (s *StateDB) AddLog(log *ethtypes.Log)

AddLog adds a log, called by evm.

func (*StateDB) AddPreimage

func (s *StateDB) AddPreimage(hash common.Hash, preimage []byte)

AddPreimage records a SHA3 preimage seen by the VM. AddPreimage performs a no-op since the EnablePreimageRecording flag is disabled on the vm.Config during state transitions. No store trie preimages are written to the database.

func (*StateDB) AddRefund

func (s *StateDB) AddRefund(gas uint64)

AddRefund adds gas to the refund counter

func (*StateDB) AddSlotToAccessList

func (s *StateDB) AddSlotToAccessList(addr common.Address, slot common.Hash)

AddSlotToAccessList adds the given (address, slot)-tuple to the access list

func (*StateDB) AddressInAccessList

func (s *StateDB) AddressInAccessList(addr common.Address) bool

AddressInAccessList returns true if the given address is in the access list.

func (*StateDB) Commit

func (s *StateDB) Commit() error

Commit writes the dirty states to keeper the StateDB object should be discarded after committed.

func (*StateDB) CreateAccount

func (s *StateDB) CreateAccount(addr common.Address)

CreateAccount explicitly creates a state object. If a state object with the address already exists the balance is carried over to the new account.

CreateAccount is called during the EVM CREATE operation. The situation might arise that a contract does the following:

1. sends funds to sha(account ++ (nonce + 1)) 2. tx_create(sha(account ++ nonce)) (note that this gets the address of 1)

Carrying over the balance ensures that Ether doesn't disappear.

func (*StateDB) Empty

func (s *StateDB) Empty(addr common.Address) bool

Empty returns whether the state object is either non-existent or empty according to the EIP161 specification (balance = nonce = code = 0)

func (*StateDB) Exist

func (s *StateDB) Exist(addr common.Address) bool

Exist reports whether the given account address exists in the state. Notably this also returns true for suicided accounts.

func (*StateDB) ForEachStorage

func (s *StateDB) ForEachStorage(addr common.Address, cb func(key, value common.Hash) bool) error

ForEachStorage iterate the contract storage, the iteration order is not defined.

func (*StateDB) GetBalance

func (s *StateDB) GetBalance(addr common.Address) *big.Int

GetBalance retrieves the balance from the given address or 0 if object not found

func (*StateDB) GetCode

func (s *StateDB) GetCode(addr common.Address) []byte

GetCode returns the code of account, nil if not exists.

func (*StateDB) GetCodeHash

func (s *StateDB) GetCodeHash(addr common.Address) common.Hash

GetCodeHash returns the code hash of account.

func (*StateDB) GetCodeSize

func (s *StateDB) GetCodeSize(addr common.Address) int

GetCodeSize returns the code size of account.

func (*StateDB) GetCommittedState

func (s *StateDB) GetCommittedState(addr common.Address, hash common.Hash) common.Hash

GetCommittedState retrieves a value from the given account's committed storage trie.

func (*StateDB) GetNonce

func (s *StateDB) GetNonce(addr common.Address) uint64

GetNonce returns the nonce of account, 0 if not exists.

func (*StateDB) GetRefund

func (s *StateDB) GetRefund() uint64

GetRefund returns the current value of the refund counter.

func (*StateDB) GetState

func (s *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash

GetState retrieves a value from the given account's storage trie.

func (*StateDB) HasSuicided

func (s *StateDB) HasSuicided(addr common.Address) bool

HasSuicided returns if the contract is suicided in current transaction.

func (*StateDB) Keeper

func (s *StateDB) Keeper() Keeper

Keeper returns the underlying `Keeper`

func (*StateDB) Logs

func (s *StateDB) Logs() []*ethtypes.Log

Logs returns the logs of current transaction.

func (*StateDB) PrepareAccessList

func (s *StateDB) PrepareAccessList(sender common.Address, dst *common.Address, precompiles []common.Address, list ethtypes.AccessList)

PrepareAccessList handles the preparatory steps for executing a state transition with regards to both EIP-2929 and EIP-2930:

- Add sender to access list (2929) - Add destination to access list (2929) - Add precompiles to access list (2929) - Add the contents of the optional tx access list (2930)

This method should only be called if Yolov3/Berlin/2929+2930 is applicable at the current number.

func (*StateDB) RevertToSnapshot

func (s *StateDB) RevertToSnapshot(revid int)

RevertToSnapshot reverts all state changes made since the given revision.

func (*StateDB) SetCode

func (s *StateDB) SetCode(addr common.Address, code []byte)

SetCode sets the code of account.

func (*StateDB) SetNonce

func (s *StateDB) SetNonce(addr common.Address, nonce uint64)

SetNonce sets the nonce of account.

func (*StateDB) SetState

func (s *StateDB) SetState(addr common.Address, key, value common.Hash)

SetState sets the contract state.

func (*StateDB) SlotInAccessList

func (s *StateDB) SlotInAccessList(addr common.Address, slot common.Hash) (addressPresent bool, slotPresent bool)

SlotInAccessList returns true if the given (address, slot)-tuple is in the access list.

func (*StateDB) Snapshot

func (s *StateDB) Snapshot() int

Snapshot returns an identifier for the current revision of the state.

func (*StateDB) SubBalance

func (s *StateDB) SubBalance(addr common.Address, amount *big.Int)

SubBalance subtracts amount from the account associated with addr.

func (*StateDB) SubRefund

func (s *StateDB) SubRefund(gas uint64)

SubRefund removes gas from the refund counter. This method will panic if the refund counter goes below zero

func (*StateDB) Suicide

func (s *StateDB) Suicide(addr common.Address) bool

Suicide marks the given account as suicided. This clears the account balance.

The account's state object is still available until the state is committed, getStateObject will return a non-nil account after Suicide.

type Storage

type Storage map[common.Hash]common.Hash

Storage represents in-memory cache/buffer of contract storage.

func (Storage) SortedKeys

func (s Storage) SortedKeys() []common.Hash

SortedKeys sort the keys for deterministic iteration

type TxConfig

type TxConfig struct {
	BlockHash common.Hash // hash of current block
	TxHash    common.Hash // hash of current tx
	TxIndex   uint        // the index of current transaction
	LogIndex  uint        // the index of next log within current block
}

TxConfig encapulates the readonly information of current tx for `StateDB`.

func NewEmptyTxConfig

func NewEmptyTxConfig(bhash common.Hash) TxConfig

NewEmptyTxConfig construct an empty TxConfig, used in context where there's no transaction, e.g. `eth_call`/`eth_estimateGas`.

func NewTxConfig

func NewTxConfig(bhash, thash common.Hash, txIndex, logIndex uint) TxConfig

NewTxConfig returns a TxConfig

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