state

package
v1.1.3 Latest Latest
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 Go to latest Published: Apr 4, 2023 License: GPL-3.0 Imports: 21 Imported by: 0

Documentation

Overview

Package state provides a caching layer atop the Ethereum state trie.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func NewStateSync 

func NewStateSync(root common.Hash, database ethdb.KeyValueReader, bloom *trie.SyncBloom) *trie.Sync

NewStateSync create a new state trie download scheduler.

Types

type Account 

type Account struct {
	Nonce            uint64
	Balance          *big.Int
	Root             common.Hash // merkle root of the storage trie
	CodeHash         []byte
	StorageKeyPrefix []byte // A prefix added to the `key` to ensure that data between different accounts are not shared
}

Account is the Ethereum consensus representation of accounts. These objects are stored in the main account trie.

type Code 

type Code []byte

func (Code) String 

func (self Code) String() string

type Database 

type Database interface {
	// OpenTrie opens the main account trie.
	OpenTrie(root common.Hash) (Trie, error)

	// OpenStorageTrie opens the storage trie of an account.
	OpenStorageTrie(addrHash, root common.Hash) (Trie, error)

	// CopyTrie returns an independent copy of the given trie.
	CopyTrie(Trie) Trie

	NewTrie(t Trie) Trie
	// ContractCode retrieves a particular contract's code.
	ContractCode(addrHash, codeHash common.Hash) ([]byte, error)

	// ContractCodeSize retrieves a particular contracts code's size.
	ContractCodeSize(addrHash, codeHash common.Hash) (int, error)

	// TrieDB retrieves the low level trie database used for data storage.
	TrieDB() *trie.Database
}

Database wraps access to tries and contract code.

func NewDatabase 

func NewDatabase(db ethdb.Database) Database

NewDatabase creates a backing store for state. The returned database is safe for concurrent use and retains cached trie nodes in memory. The pool is an optional intermediate trie-node memory pool between the low level storage layer and the high level trie abstraction.

func NewDatabaseWithCache 

func NewDatabaseWithCache(db ethdb.Database, cache int) Database

type Dump 

type Dump struct {
	Root     string                 `json:"root"`
	Accounts map[string]DumpAccount `json:"accounts"`
}

type DumpAccount 

type DumpAccount struct {
	Balance  string            `json:"balance"`
	Nonce    uint64            `json:"nonce"`
	Root     string            `json:"root"`
	CodeHash string            `json:"codeHash"`
	Code     string            `json:"code"`
	Storage  map[string]string `json:"storage"`
}

type ManagedState 

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

func ManageState 

func ManageState(statedb *StateDB) *ManagedState

ManagedState returns a new managed state with the statedb as it's backing layer

func (*ManagedState) GetNonce 

func (ms *ManagedState) GetNonce(addr common.Address) uint64

GetNonce returns the canonical nonce for the managed or unmanaged account.

Because GetNonce mutates the DB, we must take a write lock.

func (*ManagedState) HasAccount 

func (ms *ManagedState) HasAccount(addr common.Address) bool

HasAccount returns whether the given address is managed or not

func (*ManagedState) NewNonce 

func (ms *ManagedState) NewNonce(addr common.Address) uint64

NewNonce returns the new canonical nonce for the managed account

func (*ManagedState) RemoveNonce 

func (ms *ManagedState) RemoveNonce(addr common.Address, n uint64)

RemoveNonce removed the nonce from the managed state and all future pending nonces

func (*ManagedState) SetNonce 

func (ms *ManagedState) SetNonce(addr common.Address, nonce uint64)

SetNonce sets the new canonical nonce for the managed state

func (*ManagedState) SetState 

func (ms *ManagedState) SetState(statedb *StateDB)

SetState sets the backing layer of the managed state

type NodeIterator 

type NodeIterator struct {
	Hash   common.Hash // Hash of the current entry being iterated (nil if not standalone)
	Parent common.Hash // Hash of the first full ancestor node (nil if current is the root)

	Error error // Failure set in case of an internal error in the iterator
	// contains filtered or unexported fields
}

NodeIterator is an iterator to traverse the entire state trie post-order, including all of the contract code and contract state tries.

func NewNodeIterator 

func NewNodeIterator(state *StateDB) *NodeIterator

NewNodeIterator creates an post-order state node iterator.

func (*NodeIterator) Next 

func (it *NodeIterator) Next() bool

Next moves the iterator to the next node, returning whether there are any further nodes. In case of an internal error this method returns false and sets the Error field to the encountered failure.

type ParallelStateObject 

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

func NewParallelStateObject 

func NewParallelStateObject(stateObject *stateObject, createFlag bool) *ParallelStateObject

func (*ParallelStateObject) AddBalance 

func (parallelObject *ParallelStateObject) AddBalance(amount *big.Int)

func (*ParallelStateObject) GetBalance 

func (parallelObject *ParallelStateObject) GetBalance() *big.Int

func (*ParallelStateObject) GetNonce 

func (parallelObject *ParallelStateObject) GetNonce() uint64

func (*ParallelStateObject) SetNonce 

func (parallelObject *ParallelStateObject) SetNonce(nonce uint64)

func (*ParallelStateObject) SubBalance 

func (parallelObject *ParallelStateObject) SubBalance(amount *big.Int)

func (*ParallelStateObject) UpdateRoot 

func (parallelObject *ParallelStateObject) UpdateRoot()

type StateDB 

type StateDB struct {

	// Measurements gathered during execution for debugging purposes
	AccountReads   time.Duration
	AccountHashes  time.Duration
	AccountUpdates time.Duration
	AccountCommits time.Duration
	StorageReads   time.Duration
	StorageHashes  time.Duration
	StorageUpdates time.Duration
	StorageCommits time.Duration
	// contains filtered or unexported fields
}

StateDBs 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(root common.Hash, db Database) (*StateDB, error)

Create a new state from a given trie.

func (*StateDB) AddBalance 

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

AddBalance adds amount to the account associated with addr.

func (*StateDB) AddLog 

func (self *StateDB) AddLog(logInfo *types.Log)

func (*StateDB) AddMinerEarnings 

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

func (*StateDB) AddPreimage 

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

AddPreimage records a SHA3 preimage seen by the VM.

func (*StateDB) AddReferenceFunc 

func (self *StateDB) AddReferenceFunc(fn func()) int

Add childrent statedb reference

func (*StateDB) AddRefund 

func (self *StateDB) AddRefund(gas uint64)

AddRefund adds gas to the refund counter

func (*StateDB) BlockHash 

func (self *StateDB) BlockHash() common.Hash

BlockHash returns the current block hash set by Prepare.

func (*StateDB) ClearIndexReference 

func (self *StateDB) ClearIndexReference(index int)

Clear reference by index

func (*StateDB) ClearParentReference 

func (self *StateDB) ClearParentReference()

Clear Parent reference

func (*StateDB) ClearReference 

func (self *StateDB) ClearReference()

Clear reference when StateDB is committed

func (*StateDB) Commit 

func (s *StateDB) Commit(deleteEmptyObjects bool) (root common.Hash, err error)

Commit writes the state to the underlying in-memory trie database.

func (*StateDB) Copy 

func (self *StateDB) Copy() *StateDB

Copy creates a deep, independent copy of the state. Snapshots of the copied state cannot be applied to the copy.

func (*StateDB) CreateAccount 

func (self *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) Database 

func (self *StateDB) Database() Database

Database retrieves the low level database supporting the lower level trie ops.

func (*StateDB) Dump 

func (self *StateDB) Dump() []byte

func (*StateDB) Empty 

func (self *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) Error 

func (self *StateDB) Error() error

func (*StateDB) Exist 

func (self *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) Finalise 

func (s *StateDB) Finalise(deleteEmptyObjects bool)

Finalise finalises the state by removing the self destructed objects and clears the journal as well as the refunds.

func (*StateDB) ForEachStorage 

func (db *StateDB) ForEachStorage(addr common.Address, cb func(key, value []byte) bool)

func (*StateDB) GetBalance 

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

Retrieve the balance from the given address or 0 if object not found

func (*StateDB) GetByte 

func (self *StateDB) GetByte(addr common.Address, key []byte) byte

func (*StateDB) GetCode 

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

func (*StateDB) GetCodeHash 

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

func (*StateDB) GetCodeSize 

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

func (*StateDB) GetCommittedState 

func (self *StateDB) GetCommittedState(addr common.Address, key []byte) []byte

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

func (*StateDB) GetCurrentActiveVersion 

func (self *StateDB) GetCurrentActiveVersion() uint32

func (*StateDB) GetFloat32 

func (self *StateDB) GetFloat32(addr common.Address, key []byte) float32

func (*StateDB) GetFloat64 

func (self *StateDB) GetFloat64(addr common.Address, key []byte) float64

func (*StateDB) GetInt32 

func (self *StateDB) GetInt32(addr common.Address, key []byte) int32

func (*StateDB) GetInt64 

func (self *StateDB) GetInt64(addr common.Address, key []byte) int64

func (*StateDB) GetLogs 

func (self *StateDB) GetLogs(hash common.Hash) []*types.Log

func (*StateDB) GetNonce 

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

func (*StateDB) GetOrNewParallelStateObject 

func (self *StateDB) GetOrNewParallelStateObject(addr common.Address) *ParallelStateObject

func (*StateDB) GetOrNewStateObject 

func (self *StateDB) GetOrNewStateObject(addr common.Address) *stateObject

Retrieve a state object or create a new state object if nil.

func (*StateDB) GetProof 

func (s *StateDB) GetProof(a common.Address) ([][]byte, error)

GetProof returns the MerkleProof for a given Account

func (*StateDB) GetRefund 

func (self *StateDB) GetRefund() uint64

GetRefund returns the current value of the refund counter.

func (*StateDB) GetState 

func (self *StateDB) GetState(addr common.Address, key []byte) []byte

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

func (*StateDB) GetStorageProof 

func (s *StateDB) GetStorageProof(a common.Address, key common.Hash) ([][]byte, error)

GetProof returns the StorageProof for given key

func (*StateDB) GetString 

func (self *StateDB) GetString(addr common.Address, key []byte) string

func (*StateDB) HadParent 

func (self *StateDB) HadParent() bool

func (*StateDB) HasSuicided 

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

func (*StateDB) IncreaseTxIdx 

func (self *StateDB) IncreaseTxIdx()

func (*StateDB) IntermediateRoot 

func (s *StateDB) IntermediateRoot(deleteEmptyObjects bool) common.Hash

IntermediateRoot computes the current root hash of the state trie. It is called in between transactions to get the root hash that goes into transaction receipts.

func (*StateDB) ListActiveVersion 

func (self *StateDB) ListActiveVersion() ([]gov.ActiveVersionValue, error)

Obtain version information maintained by governance

func (*StateDB) Logs 

func (self *StateDB) Logs() []*types.Log

func (*StateDB) Merge 

func (s *StateDB) Merge(idx int, from, to *ParallelStateObject, deleteEmptyObjects bool)

func (*StateDB) MigrateStorage 

func (db *StateDB) MigrateStorage(from, to common.Address)

func (*StateDB) NewStateDB 

func (self *StateDB) NewStateDB() *StateDB

New StateDB based on the parent StateDB

func (*StateDB) Preimages 

func (self *StateDB) Preimages() map[common.Hash][]byte

Preimages returns a list of SHA3 preimages that have been submitted.

func (*StateDB) Prepare 

func (self *StateDB) Prepare(thash, bhash common.Hash, ti int)

Prepare sets the current transaction hash and index and block hash which is used when the EVM emits new state logs.

func (*StateDB) RawDump 

func (self *StateDB) RawDump() Dump

func (*StateDB) Reset 

func (self *StateDB) Reset(root common.Hash) error

Reset clears out all ephemeral state objects from the state db, but keeps the underlying state trie to avoid reloading data for the next operations.

func (*StateDB) RevertToSnapshot 

func (self *StateDB) RevertToSnapshot(revid int)

RevertToSnapshot reverts all state changes made since the given revision.

func (*StateDB) Root 

func (s *StateDB) Root() common.Hash

func (*StateDB) SetBalance 

func (self *StateDB) SetBalance(addr common.Address, amount *big.Int)

func (*StateDB) SetByte 

func (self *StateDB) SetByte(addr common.Address, key []byte, value byte)

func (*StateDB) SetCode 

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

func (*StateDB) SetFloat32 

func (self *StateDB) SetFloat32(addr common.Address, key []byte, value float32)

func (*StateDB) SetFloat64 

func (self *StateDB) SetFloat64(addr common.Address, key []byte, value float64)

func (*StateDB) SetInt32 

func (self *StateDB) SetInt32(addr common.Address, key []byte, value int32)

func (*StateDB) SetInt64 

func (self *StateDB) SetInt64(addr common.Address, key []byte, value int64)

func (*StateDB) SetNonce 

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

func (*StateDB) SetState 

func (self *StateDB) SetState(address common.Address, key, value []byte)

func (*StateDB) SetString 

func (self *StateDB) SetString(addr common.Address, key []byte, value string)

func (*StateDB) Snapshot 

func (self *StateDB) Snapshot() int

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

func (*StateDB) StorageTrie 

func (self *StateDB) StorageTrie(addr common.Address) Trie

StorageTrie returns the storage trie of an account. The return value is a copy and is nil for non-existent accounts.

func (*StateDB) SubBalance 

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

SubBalance subtracts amount from the account associated with addr.

func (*StateDB) SubRefund 

func (self *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 (self *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.

func (*StateDB) TxHash 

func (self *StateDB) TxHash() common.Hash

func (*StateDB) TxIdx 

func (self *StateDB) TxIdx() uint32

func (*StateDB) TxIndex 

func (self *StateDB) TxIndex() int

TxIndex returns the current transaction index set by Prepare.

type Trie 

type Trie interface {
	TryGet(key []byte) ([]byte, error)
	TryUpdate(key, value []byte) error
	TryDelete(key []byte) error
	Commit(onleaf trie.LeafCallback) (common.Hash, error)
	ParallelCommit(onleaf trie.LeafCallback) (common.Hash, error)
	Hash() common.Hash
	ParallelHash() common.Hash
	NodeIterator(startKey []byte) trie.NodeIterator
	GetKey([]byte) []byte // TODO(fjl): remove this when SecureTrie is removed
	Prove(key []byte, fromLevel uint, proofDb ethdb.KeyValueWriter) error
}

Trie is a Ethereum Merkle Trie.

type ValueStorage 

type ValueStorage map[string][]byte

func (ValueStorage) Copy 

func (self ValueStorage) Copy() ValueStorage

func (ValueStorage) String 

func (self ValueStorage) String() (str string)

Source Files

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