state

package
v1.10.4 Latest Latest
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 Go to latest Published: Jun 17, 2021 License: GPL-3.0 Imports: 22 Imported by: 5,222

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 added in v1.3.1 

func NewStateSync(root common.Hash, database ethdb.KeyValueReader, bloom *trie.SyncBloom, onLeaf func(paths [][]byte, leaf []byte) error) *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
}

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 (c Code) String() string

type Database added in v1.6.7 

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

	// 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 added in v1.6.7 

func NewDatabase(db ethdb.Database) Database

NewDatabase creates a backing store for state. The returned database is safe for concurrent use, but does not retain any recent trie nodes in memory. To keep some historical state in memory, use the NewDatabaseWithConfig constructor.

func NewDatabaseWithConfig added in v1.9.25 

func NewDatabaseWithConfig(db ethdb.Database, config *trie.Config) Database

NewDatabaseWithConfig creates a backing store for state. The returned database is safe for concurrent use and retains a lot of collapsed RLP trie nodes in a large memory cache.

type Dump added in v1.4.13 

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

Dump represents the full dump in a collected format, as one large map.

func (*Dump) OnAccount added in v1.9.16 

func (d *Dump) OnAccount(addr common.Address, account DumpAccount)

OnAccount implements DumpCollector interface

func (*Dump) OnRoot added in v1.9.16 

func (d *Dump) OnRoot(root common.Hash)

OnRoot implements DumpCollector interface

type DumpAccount added in v1.4.13 

type DumpAccount struct {
	Balance   string                 `json:"balance"`
	Nonce     uint64                 `json:"nonce"`
	Root      hexutil.Bytes          `json:"root"`
	CodeHash  hexutil.Bytes          `json:"codeHash"`
	Code      hexutil.Bytes          `json:"code,omitempty"`
	Storage   map[common.Hash]string `json:"storage,omitempty"`
	Address   *common.Address        `json:"address,omitempty"` // Address only present in iterative (line-by-line) mode
	SecureKey hexutil.Bytes          `json:"key,omitempty"`     // If we don't have address, we can output the key

}

DumpAccount represents an account in the state.

type DumpCollector added in v1.9.16 

type DumpCollector interface {
	// OnRoot is called with the state root
	OnRoot(common.Hash)
	// OnAccount is called once for each account in the trie
	OnAccount(common.Address, DumpAccount)
}

DumpCollector interface which the state trie calls during iteration

type DumpConfig added in v1.10.4 

type DumpConfig struct {
	SkipCode          bool
	SkipStorage       bool
	OnlyWithAddresses bool
	Start             []byte
	Max               uint64
}

DumpConfig is a set of options to control what portions of the statewill be iterated and collected.

type IteratorDump added in v1.9.13 

type IteratorDump struct {
	Root     string                         `json:"root"`
	Accounts map[common.Address]DumpAccount `json:"accounts"`
	Next     []byte                         `json:"next,omitempty"` // nil if no more accounts
}

IteratorDump is an implementation for iterating over data.

func (*IteratorDump) OnAccount added in v1.9.16 

func (d *IteratorDump) OnAccount(addr common.Address, account DumpAccount)

OnAccount implements DumpCollector interface

func (*IteratorDump) OnRoot added in v1.9.16 

func (d *IteratorDump) OnRoot(root common.Hash)

OnRoot implements DumpCollector interface

type NodeIterator added in v1.4.0 

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 added in v1.4.0 

func NewNodeIterator(state *StateDB) *NodeIterator

NewNodeIterator creates an post-order state node iterator.

func (*NodeIterator) Next added in v1.4.0 

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 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
	SnapshotAccountReads time.Duration
	SnapshotStorageReads time.Duration
	SnapshotCommits      time.Duration
	// 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(root common.Hash, db Database, snaps *snapshot.Tree) (*StateDB, error)

New creates a new state from a given trie.

func (*StateDB) AddAddressToAccessList added in v1.9.24 

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 *types.Log)

func (*StateDB) AddPreimage added in v1.5.8 

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

AddPreimage records a SHA3 preimage seen by the VM.

func (*StateDB) AddRefund added in v1.3.1 

func (s *StateDB) AddRefund(gas uint64)

AddRefund adds gas to the refund counter

func (*StateDB) AddSlotToAccessList added in v1.9.24 

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

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

func (*StateDB) AddressInAccessList added in v1.9.24 

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

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

func (*StateDB) BlockHash added in v1.9.0 

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

BlockHash returns the current block hash set by Prepare.

func (*StateDB) Commit added in v1.3.1 

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

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

func (*StateDB) Copy 

func (s *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 (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) Database added in v1.8.0 

func (s *StateDB) Database() Database

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

func (*StateDB) Dump 

func (s *StateDB) Dump(opts *DumpConfig) []byte

Dump returns a JSON string representing the entire state as a single json-object

func (*StateDB) DumpToCollector added in v1.9.16 

func (s *StateDB) DumpToCollector(c DumpCollector, conf *DumpConfig) (nextKey []byte)

DumpToCollector iterates the state according to the given options and inserts the items into a collector for aggregation or serialization.

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) Error added in v1.6.7 

func (s *StateDB) Error() error

func (*StateDB) Exist added in v1.3.1 

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) Finalise added in v1.6.2 

func (s *StateDB) Finalise(deleteEmptyObjects bool)

Finalise finalises the state by removing the s destructed objects and clears the journal as well as the refunds. Finalise, however, will not push any updates into the tries just yet. Only IntermediateRoot or Commit will do that.

func (*StateDB) ForEachStorage added in v1.6.0 

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

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

func (*StateDB) GetCodeHash added in v1.4.8 

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

func (*StateDB) GetCodeSize added in v1.4.13 

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

func (*StateDB) GetCommittedState added in v1.8.16 

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) GetLogs 

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

func (*StateDB) GetNonce 

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

func (*StateDB) GetOrNewStateObject 

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

GetOrNewStateObject retrieves a state object or create a new state object if nil.

func (*StateDB) GetProof added in v1.8.18 

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

GetProof returns the Merkle proof for a given account.

func (*StateDB) GetProofByHash added in v1.10.0 

func (s *StateDB) GetProofByHash(addrHash common.Hash) ([][]byte, error)

GetProofByHash returns the Merkle proof for a given account.

func (*StateDB) GetRefund added in v1.3.1 

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) GetStorageProof added in v1.8.18 

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

GetStorageProof returns the Merkle proof for given storage slot.

func (*StateDB) GetStorageProofByHash added in v1.10.0 

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

GetStorageProofByHash returns the Merkle proof for given storage slot.

func (*StateDB) HasSuicided added in v1.4.16 

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

func (*StateDB) IntermediateRoot added in v1.3.1 

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) IterativeDump added in v1.9.0 

func (s *StateDB) IterativeDump(opts *DumpConfig, output *json.Encoder)

IterativeDump dumps out accounts as json-objects, delimited by linebreaks on stdout

func (*StateDB) IteratorDump added in v1.9.13 

func (s *StateDB) IteratorDump(opts *DumpConfig) IteratorDump

IteratorDump dumps out a batch of accounts starts with the given start key

func (*StateDB) Logs 

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

func (*StateDB) Preimages added in v1.5.8 

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

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

func (*StateDB) Prepare added in v1.6.2 

func (s *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) PrepareAccessList added in v1.10.0 

func (s *StateDB) PrepareAccessList(sender common.Address, dst *common.Address, precompiles []common.Address, list types.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 Berlin/2929+2930 is applicable at the current number.

func (*StateDB) RawDump 

func (s *StateDB) RawDump(opts *DumpConfig) Dump

RawDump returns the entire state an a single large object

func (*StateDB) RevertToSnapshot added in v1.4.16 

func (s *StateDB) RevertToSnapshot(revid int)

RevertToSnapshot reverts all state changes made since the given revision.

func (*StateDB) SetBalance added in v1.4.16 

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

func (*StateDB) SetCode 

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

func (*StateDB) SetNonce 

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

func (*StateDB) SetState 

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

func (*StateDB) SetStorage added in v1.9.2 

func (s *StateDB) SetStorage(addr common.Address, storage map[common.Hash]common.Hash)

SetStorage replaces the entire storage for the specified account with given storage. This function should only be used for debugging.

func (*StateDB) SlotInAccessList added in v1.9.24 

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 added in v1.4.16 

func (s *StateDB) Snapshot() int

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

func (*StateDB) StartPrefetcher added in v1.10.0 

func (s *StateDB) StartPrefetcher(namespace string)

StartPrefetcher initializes a new trie prefetcher to pull in nodes from the state trie concurrently while the state is mutated so that when we reach the commit phase, most of the needed data is already hot.

func (*StateDB) StopPrefetcher added in v1.10.0 

func (s *StateDB) StopPrefetcher()

StopPrefetcher terminates a running prefetcher and reports any leftover stats from the gathered metrics.

func (*StateDB) StorageTrie added in v1.6.1 

func (s *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 added in v1.5.5 

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

SubBalance subtracts amount from the account associated with addr.

func (*StateDB) SubRefund added in v1.8.16 

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 added in v1.4.16 

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.

func (*StateDB) TxIndex added in v1.9.0 

func (s *StateDB) TxIndex() int

TxIndex returns the current transaction index set by Prepare.

type Storage 

type Storage map[common.Hash]common.Hash

func (Storage) Copy 

func (s Storage) Copy() Storage

func (Storage) String 

func (s Storage) String() (str string)

type Trie added in v1.6.7 

type Trie interface {
	// GetKey returns the sha3 preimage of a hashed key that was previously used
	// to store a value.
	//
	// TODO(fjl): remove this when SecureTrie is removed
	GetKey([]byte) []byte

	// TryGet returns the value for key stored in the trie. The value bytes must
	// not be modified by the caller. If a node was not found in the database, a
	// trie.MissingNodeError is returned.
	TryGet(key []byte) ([]byte, error)

	// TryUpdate associates key with value in the trie. If value has length zero, any
	// existing value is deleted from the trie. The value bytes must not be modified
	// by the caller while they are stored in the trie. If a node was not found in the
	// database, a trie.MissingNodeError is returned.
	TryUpdate(key, value []byte) error

	// TryDelete removes any existing value for key from the trie. If a node was not
	// found in the database, a trie.MissingNodeError is returned.
	TryDelete(key []byte) error

	// Hash returns the root hash of the trie. It does not write to the database and
	// can be used even if the trie doesn't have one.
	Hash() common.Hash

	// Commit writes all nodes to the trie's memory database, tracking the internal
	// and external (for account tries) references.
	Commit(onleaf trie.LeafCallback) (common.Hash, error)

	// NodeIterator returns an iterator that returns nodes of the trie. Iteration
	// starts at the key after the given start key.
	NodeIterator(startKey []byte) trie.NodeIterator

	// Prove constructs a Merkle proof for key. The result contains all encoded nodes
	// on the path to the value at key. The value itself is also included in the last
	// node and can be retrieved by verifying the proof.
	//
	// If the trie does not contain a value for key, the returned proof contains all
	// nodes of the longest existing prefix of the key (at least the root), ending
	// with the node that proves the absence of the key.
	Prove(key []byte, fromLevel uint, proofDb ethdb.KeyValueWriter) error
}

Trie is a Ethereum Merkle Patricia trie.

Source Files

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Directories

Path Synopsis
Package snapshot implements a journalled, dynamic state dump.
 Package snapshot implements a journalled, dynamic state dump.

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