state

package
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 Go to latest Published: Jan 10, 2022 License: MIT Imports: 16 Imported by: 0

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Index

Constants

View Source 
const IncomingTxProtocol = "TxGossip"

IncomingTxProtocol is the protocol identifier for tx received by gossip that is used by the p2p.

Variables

View Source 
var MaxTrieCacheGen = uint16(120)

MaxTrieCacheGen is Trie cache generation limit after which to evict trie nodes from memory.

Functions

func PublicKeyToAccountAddress 

func PublicKeyToAccountAddress(pub ed25519.PublicKey) types.Address

PublicKeyToAccountAddress converts ed25519 public key to account address.

Types

type AccountState 

type AccountState interface {
	GetBalance() uint64
	GetNonce() uint64
	SetNonce(newNonce uint64)
	AddBalance(amount uint64)
	SubBalance(amount uint64)
	SetBalance(amount uint64)
	GetAddress() types.Address
}

AccountState is the interface defined to query a single account state.

type DB 

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

DB is the struct that performs logging of all account states. It consists of a state trie that contains all account data in its leaves. It also stores a dirty object list to dump when state is committed into db.

func New 

func New(root types.Hash32, db Database) (*DB, error)

New create a new state from a given trie.

func (*DB) AddBalance 

func (state *DB) AddBalance(addr types.Address, amount uint64)

AddBalance adds amount to the account associated with addr.

func (*DB) Commit 

func (state *DB) Commit() (root types.Hash32, err error)

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

func (*DB) Copy 

func (state *DB) Copy() *DB

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

func (*DB) CreateAccount 

func (state *DB) CreateAccount(addr types.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 (*DB) Dump 

func (state *DB) Dump() []byte

Dump dumps the current state into json form, encoded into bytes.

func (*DB) Empty 

func (state *DB) Empty(addr types.Address) bool

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

func (*DB) Error 

func (state *DB) Error() error

Error returns db error if it occurred.

func (*DB) Exist 

func (state *DB) Exist(addr types.Address) bool

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

func (*DB) GetAllAccounts 

func (state *DB) GetAllAccounts() (*types.MultipleAccountsState, error)

GetAllAccounts returns a dump of all accounts in global state.

func (*DB) GetBalance 

func (state *DB) GetBalance(addr types.Address) uint64

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

func (*DB) GetNonce 

func (state *DB) GetNonce(addr types.Address) uint64

GetNonce gets the current nonce of the given addr, if the address is not found it returns 0.

func (*DB) GetOrNewStateObj 

func (state *DB) GetOrNewStateObj(addr types.Address) *Object

GetOrNewStateObj retrieve a state object or create a new state object if nil.

func (*DB) IntermediateRoot 

func (state *DB) IntermediateRoot(deleteEmptyObjects bool) types.Hash32

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 (*DB) RawDump 

func (state *DB) RawDump() types.MultipleAccountsState

RawDump returns a Dump struct for the receivers state.

func (*DB) SetBalance 

func (state *DB) SetBalance(addr types.Address, amount uint64)

SetBalance sets balance to the specific address, it does not return error if address was not found.

func (*DB) SetNonce 

func (state *DB) SetNonce(addr types.Address, nonce uint64)

SetNonce sets nonce to the specific address, it does not return error if address was not found.

func (*DB) SubBalance 

func (state *DB) SubBalance(addr types.Address, amount uint64)

SubBalance subtracts amount from the account associated with addr.

func (*DB) TrieDB 

func (state *DB) TrieDB() *trie.Database

TrieDB retrieves the low level trie database used for data storage.

type Database 

type Database interface {
	// OpenTrie opens the main account trie.
	OpenTrie(root types.Hash32) (Trie, error)

	// OpenStorageTrie opens the storage trie of an account.
	OpenStorageTrie(addrHash, root types.Hash32) (Trie, error)

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

	// 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 database.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.

type Object 

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

Object is the struct in which account information is stored. It contains account info such as nonce and balance and also the accounts address, address hash and a reference to this structs containing database.

func (*Object) AddBalance 

func (state *Object) AddBalance(amount uint64)

AddBalance removes amount from c's balance. It is used to add funds to the destination account of a transfer.

func (*Object) Address 

func (state *Object) Address() types.Address

Address returns the address of the contract/account.

func (*Object) Balance 

func (state *Object) Balance() uint64

Balance returns the account current balance.

func (*Object) EncodeRLP 

func (state *Object) EncodeRLP(w io.Writer) error

EncodeRLP implements rlp.Encoder.

func (*Object) Nonce 

func (state *Object) Nonce() uint64

Nonce returns the accounts current nonce.

func (*Object) ReturnGas 

func (state *Object) ReturnGas(gas *big.Int)

ReturnGas Return the gas back to the origin. Used by the Virtual machine or Closures.

func (*Object) SetBalance 

func (state *Object) SetBalance(amount uint64)

SetBalance sets the balance for current account.

func (*Object) SetNonce 

func (state *Object) SetNonce(nonce uint64)

SetNonce sets the nonce to be nonce for this Object.

func (*Object) SubBalance 

func (state *Object) SubBalance(amount uint64)

SubBalance removes amount from c's balance. It is used to remove funds from the origin account of a transfer.

func (*Object) Value 

func (state *Object) Value() *big.Int

Value Never called, but must be present to allow Object to be used as a vm.Account interface that also satisfies the vm.ContractRef interface. Interfaces are awesome.

type PreImages 

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

PreImages is a struct that contains a root hash and the transactions that are in store of this root hash.

type Projector 

type Projector interface {
	GetProjection(addr types.Address, prevNonce, prevBalance uint64) (nonce, balance uint64, err error)
}

Projector interface defines the interface for a struct that can project the state of an account by applying txs from mem pool.

type TransactionProcessor 

type TransactionProcessor struct {
	log.Log
	*DB
	// contains filtered or unexported fields
}

TransactionProcessor is the struct containing state db and is responsible for applying transactions into it.

func NewTransactionProcessor 

func NewTransactionProcessor(allStates, processorDb database.Database, projector Projector, txPool *mempool.TxMempool, logger log.Log) *TransactionProcessor

NewTransactionProcessor returns a new state processor.

func (*TransactionProcessor) AddTxToPool 

func (tp *TransactionProcessor) AddTxToPool(tx *types.Transaction)

AddTxToPool exports mempool functionality for adding tx to the pool.

func (*TransactionProcessor) AddressExists 

func (tp *TransactionProcessor) AddressExists(addr types.Address) bool

AddressExists checks if an account address exists in this node's global state.

func (*TransactionProcessor) ApplyRewards 

func (tp *TransactionProcessor) ApplyRewards(layer types.LayerID, rewards map[types.Address]uint64)

ApplyRewards applies reward reward to miners vector for layer.

func (*TransactionProcessor) ApplyTransaction 

func (tp *TransactionProcessor) ApplyTransaction(tx *types.Transaction, layerID types.LayerID) error

ApplyTransaction applies provided transaction to the current state, but does not commit it to persistent storage. It returns an error if the transaction is invalid, i.e., if there is not enough balance in the source account to perform the transaction and pay the fee or if the nonce is incorrect.

func (*TransactionProcessor) ApplyTransactions 

func (tp *TransactionProcessor) ApplyTransactions(layer types.LayerID, txs []*types.Transaction) ([]*types.Transaction, error)

ApplyTransactions receives a batch of transactions to apply to state. Returns the number of transactions that we failed to apply.

func (*TransactionProcessor) GetLayerApplied 

func (tp *TransactionProcessor) GetLayerApplied(txID types.TransactionID) *types.LayerID

GetLayerApplied gets the layer id at which this tx was applied.

func (*TransactionProcessor) GetLayerStateRoot 

func (tp *TransactionProcessor) GetLayerStateRoot(layer types.LayerID) (types.Hash32, error)

GetLayerStateRoot returns the state root at a given layer.

func (*TransactionProcessor) GetStateRoot 

func (tp *TransactionProcessor) GetStateRoot() types.Hash32

GetStateRoot gets the current state root hash.

func (*TransactionProcessor) LoadState 

func (tp *TransactionProcessor) LoadState(layer types.LayerID) error

LoadState loads the last state from persistent storage.

func (*TransactionProcessor) Process 

func (tp *TransactionProcessor) Process(txs []*types.Transaction, layerID types.LayerID) (remaining []*types.Transaction)

Process applies transaction vector to current state, it returns the remaining transactions that failed.

func (*TransactionProcessor) ValidateNonceAndBalance 

func (tp *TransactionProcessor) ValidateNonceAndBalance(tx *types.Transaction) error

ValidateNonceAndBalance validates that the tx origin account has enough balance to apply the tx, also, it checks that nonce in tx is correct, returns error otherwise.

type Trie 

type Trie interface {
	TryGet(key []byte) ([]byte, error)
	TryUpdate(key, value []byte) error
	TryDelete(key []byte) error
	Commit(onleaf trie.LeafCallback) (types.Hash32, error)
	Hash() types.Hash32
	NodeIterator(startKey []byte) trie.NodeIterator
	GetKey([]byte) []byte // TODO(fjl): remove this when SecureTrie is removed
	Prove(key []byte, fromLevel uint, proofDb database.Putter) error
}

Trie is a Ethereum Merkle Trie.

Source Files

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