Documentation
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Overview ¶
Package state provides a caching layer atop the Ethereum state trie.
Index ¶
- func NewStateSync(root common.Hash, database ethdb.KeyValueReader, bloom *trie.SyncBloom) *trie.Sync
- type Account
- type Code
- type Database
- type Dump
- type DumpAccount
- type NodeIterator
- type StateDB
- func (self *StateDB) AddBalance(addr common.Address, amount *big.Int)
- func (self *StateDB) AddLog(log *types.Log)
- func (self *StateDB) AddPreimage(hash common.Hash, preimage []byte)
- func (self *StateDB) AddRefund(gas uint64)
- func (self *StateDB) BlockHash() common.Hash
- func (s *StateDB) Commit(deleteEmptyObjects bool) (root common.Hash, err error)
- func (self *StateDB) Copy() *StateDB
- func (self *StateDB) CreateAccount(addr common.Address)
- func (self *StateDB) Database() Database
- func (self *StateDB) Dump(excludeCode, excludeStorage, excludeMissingPreimages bool) []byte
- func (self *StateDB) Empty(addr common.Address) bool
- func (self *StateDB) Error() error
- func (self *StateDB) Exist(addr common.Address) bool
- func (s *StateDB) Finalise(deleteEmptyObjects bool)
- func (db *StateDB) ForEachStorage(addr common.Address, cb func(key, value common.Hash) bool) error
- func (self *StateDB) GetBalance(addr common.Address) *big.Int
- func (self *StateDB) GetCode(addr common.Address) []byte
- func (self *StateDB) GetCodeHash(addr common.Address) common.Hash
- func (self *StateDB) GetCodeSize(addr common.Address) int
- func (self *StateDB) GetCommittedState(addr common.Address, hash common.Hash) common.Hash
- func (self *StateDB) GetLogs(hash common.Hash) []*types.Log
- func (self *StateDB) GetNonce(addr common.Address) uint64
- func (self *StateDB) GetOrNewStateObject(addr common.Address) *stateObject
- func (self *StateDB) GetProof(a common.Address) ([][]byte, error)
- func (self *StateDB) GetRefund() uint64
- func (self *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash
- func (self *StateDB) GetStorageProof(a common.Address, key common.Hash) ([][]byte, error)
- func (self *StateDB) HasSuicided(addr common.Address) bool
- func (s *StateDB) IntermediateRoot(deleteEmptyObjects bool) common.Hash
- func (self *StateDB) IterativeDump(excludeCode, excludeStorage, excludeMissingPreimages bool, ...)
- func (self *StateDB) Logs() []*types.Log
- func (self *StateDB) Preimages() map[common.Hash][]byte
- func (self *StateDB) Prepare(thash, bhash common.Hash, ti int)
- func (self *StateDB) RawDump(excludeCode, excludeStorage, excludeMissingPreimages bool) Dump
- func (self *StateDB) Reset(root common.Hash) error
- func (self *StateDB) RevertToSnapshot(revid int)
- func (self *StateDB) SetBalance(addr common.Address, amount *big.Int)
- func (self *StateDB) SetCode(addr common.Address, code []byte)
- func (self *StateDB) SetNonce(addr common.Address, nonce uint64)
- func (self *StateDB) SetState(addr common.Address, key, value common.Hash)
- func (self *StateDB) Snapshot() int
- func (self *StateDB) StorageTrie(addr common.Address) Trie
- func (self *StateDB) SubBalance(addr common.Address, amount *big.Int)
- func (self *StateDB) SubRefund(gas uint64)
- func (self *StateDB) Suicide(addr common.Address) bool
- func (self *StateDB) TxIndex() int
- type Storage
- type Trie
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) *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 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
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 NewDatabaseWithCache constructor.
type Dump ¶ added in v1.4.14
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
type DumpAccount ¶ added in v1.4.14
type DumpAccount struct { Balance string `json:"balance"` Nonce uint64 `json:"nonce"` Root string `json:"root"` CodeHash string `json:"codeHash"` Code string `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 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 // 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 (*StateDB) AddBalance ¶
AddBalance adds amount to the account associated with addr.
func (*StateDB) AddPreimage ¶ added in v1.5.8
AddPreimage records a SHA3 preimage seen by the VM.
func (*StateDB) BlockHash ¶ added in v1.9.0
BlockHash returns the current block hash set by Prepare.
func (*StateDB) Commit ¶ added in v1.3.1
Commit writes the state to the underlying in-memory trie database.
func (*StateDB) Copy ¶
Copy creates a deep, independent copy of the state. Snapshots of the copied state cannot be applied to the copy.
func (*StateDB) CreateAccount ¶
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:
- sends funds to sha(account ++ (nonce + 1))
- 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
Database retrieves the low level database supporting the lower level trie ops.
func (*StateDB) Dump ¶
Dump returns a JSON string representing the entire state as a single json-object
func (*StateDB) Empty ¶
Empty returns whether the state object is either non-existent or empty according to the EIP161 specification (balance = nonce = code = 0)
func (*StateDB) Exist ¶ added in v1.3.1
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
Finalise finalises the state by removing the self destructed objects and clears the journal as well as the refunds.
func (*StateDB) ForEachStorage ¶ added in v1.6.0
func (*StateDB) GetBalance ¶
Retrieve the balance from the given address or 0 if object not found
func (*StateDB) GetCodeHash ¶ added in v1.4.16
func (*StateDB) GetCodeSize ¶ added in v1.4.14
func (*StateDB) GetCommittedState ¶ added in v1.8.16
GetCommittedState retrieves a value from the given account's committed storage trie.
func (*StateDB) GetOrNewStateObject ¶
Retrieve a state object or create a new state object if nil.
func (*StateDB) GetRefund ¶ added in v1.3.1
GetRefund returns the current value of the refund counter.
func (*StateDB) GetStorageProof ¶ added in v1.8.18
GetProof returns the StorageProof for given key
func (*StateDB) HasSuicided ¶ added in v1.4.16
func (*StateDB) IntermediateRoot ¶ added in v1.3.1
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 (self *StateDB) IterativeDump(excludeCode, excludeStorage, excludeMissingPreimages bool, output *json.Encoder)
IterativeDump dumps out accounts as json-objects, delimited by linebreaks on stdout
func (*StateDB) Preimages ¶ added in v1.5.8
Preimages returns a list of SHA3 preimages that have been submitted.
func (*StateDB) Prepare ¶ added in v1.6.2
Prepare sets the current transaction hash and index and block hash which is used when the EVM emits new state logs.
func (*StateDB) Reset ¶
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 ¶ added in v1.4.16
RevertToSnapshot reverts all state changes made since the given revision.
func (*StateDB) SetBalance ¶ added in v1.4.16
func (*StateDB) Snapshot ¶ added in v1.4.16
Snapshot returns an identifier for the current revision of the state.
func (*StateDB) StorageTrie ¶ added in v1.6.1
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
SubBalance subtracts amount from the account associated with addr.
func (*StateDB) SubRefund ¶ added in v1.8.16
SubRefund removes gas from the refund counter. This method will panic if the refund counter goes below zero
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.