state

package
v0.1.3 Latest Latest
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 Go to latest Published: Dec 27, 2019 License: Apache-2.0 Imports: 22 Imported by: 0

Documentation

Overview

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

Index

Constants

View Source 
const (
	OPZERO  int = iota
	OPCLEAR     // clear 0
	OPADD       // +1
	OPSUB       //-1
)

OP indicate the operation to score

Variables

View Source 
var MaxTrieCacheGen = uint16(120)

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

View Source 
var TagArray = byte(7)

TagArray in TLV

View Source 
var TagString = byte(6)

TagString in TLV

Functions

func CanRollBackOneBlock 

func CanRollBackOneBlock(db dbm.DB, height uint64) bool

func NewStateSync 

func NewStateSync(root common.Hash, database trie.DatabaseReader) *trie.Sync

NewStateSync create a new state trie download scheduler.

Types

type Account 

type Account struct {
	Nonce    uint64
	Credits  uint64
	Balance  *big.Int
	Tokens   map[common.Address]*big.Int
	Root     common.Hash // merkle(or kv) 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 CandidateJSON 

type CandidateJSON struct {
	PubKey       string         `json:"pub_key"`
	CoinBase     common.Address `json:"coinbase"`
	VotingPower  int64          `json:"voting_power"`
	Score        int64          `json:"score"`
	PunishHeight uint64         `json:"punish_height"`
}

CandidateJSON used for json encoded in candidate contract

type Code 

type Code []byte

func (Code) String 

func (c Code) String() string

type CoefficientJSON 

type CoefficientJSON struct {
	VotePeriod     uint64 `json:"VotePeriod"` //voting per VotePeriod blocks
	types.VoteRate `json:"VoteRate"`
	types.CalRate  `json:"CalRate"`
	MaxScore       int64  `json:"MaxScore"`
	UTXOFee        string `json:"UTXOFee"`
}

CoefficientJSON used for json encoded in coefficient contract

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

	// 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() TrieDB
}

Database wraps access to tries and contract code.

func NewDatabase 

func NewDatabase(db dbm.DB) 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 NewKeyValueDBWithCache 

func NewKeyValueDBWithCache(db dbm.DB, cache int, isTrie bool, height uint64) 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"`
	Credits  uint64            `json:"credits"`
	Root     string            `json:"root"`
	CodeHash string            `json:"codeHash"`
	Code     string            `json:"code"`
	Storage  map[string]string `json:"storage"`

	Tokens map[common.Address]*big.Int `json:"tokens"`
}

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 OldAccount 

type OldAccount struct {
	Nonce    uint64
	Balance  *big.Int
	Root     common.Hash // merkle root of the storage trie
	CodeHash []byte
}

type StateDB 

type StateDB struct {
	// 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 (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 

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

AddPreimage records a SHA3 preimage seen by the VM.

func (*StateDB) AddRefund 

func (s *StateDB) AddRefund(gas uint64)

AddRefund adds gas to the refund counter

func (*StateDB) AddTokenBalance 

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

func (*StateDB) Commit 

func (s *StateDB) Commit(deleteEmptyObjects bool, height uint64) (root common.Hash, err 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 

func (s *StateDB) Database() Database

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

func (*StateDB) Dump 

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

func (*StateDB) DumpAccounts added in v0.1.1 

func (s *StateDB) DumpAccounts() map[common.Address][]byte

func (*StateDB) DumpOldAccount 

func (s *StateDB) DumpOldAccount() map[common.Address][]byte

func (*StateDB) DumpStorage 

func (s *StateDB) DumpStorage() map[string]string

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 

func (s *StateDB) Error() error

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

func (*StateDB) GetAccount 

func (s *StateDB) GetAccount(address common.Address) *Account

func (*StateDB) GetAllCandidates 

func (st *StateDB) GetAllCandidates(logger log.Logger) []*types.CandidateState

GetAllCandidates get inner CandidateState from contract

func (*StateDB) GetBalance 

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

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

func (*StateDB) GetCandidatesDeposit 

func (st *StateDB) GetCandidatesDeposit(addrs []common.Address, logger log.Logger) []*big.Int

GetCandidatesDeposit get deposit amount from pledge contract

func (*StateDB) GetCode 

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

func (*StateDB) GetCodeHash 

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

func (*StateDB) GetCodeSize 

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

func (*StateDB) GetCoefficient 

func (st *StateDB) GetCoefficient(logger log.Logger) *types.Coefficient

GetCoefficient read all coefficient from contract stateDB

func (*StateDB) GetCommittedState 

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

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

func (*StateDB) GetContractCode 

func (s *StateDB) GetContractCode(addr []byte) []byte

func (*StateDB) GetCredits 

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

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

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

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) []byte

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

func (*StateDB) GetStorageRoot 

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

func (*StateDB) GetTokenBalance 

func (s *StateDB) GetTokenBalance(addr common.Address, token common.Address) *big.Int

func (*StateDB) GetTokenBalances 

func (s *StateDB) GetTokenBalances(addr common.Address) types.TokenValues

func (*StateDB) GetWhiteValidators 

func (st *StateDB) GetWhiteValidators(logger log.Logger) []*types.Validator

GetWhiteValidators get inner validators in whiteList contract

func (*StateDB) HasSuicided 

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

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) IsContract 

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

func (*StateDB) JSONDumpKV added in v0.1.1 

func (s *StateDB) JSONDumpKV() []string

func (*StateDB) JSONDumpOldTrie added in v0.1.1 

func (s *StateDB) JSONDumpOldTrie() []string

func (*StateDB) JSONDumpTrie added in v0.1.1 

func (s *StateDB) JSONDumpTrie() []string

func (*StateDB) Logs 

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

func (*StateDB) Preimages 

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

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

func (*StateDB) Prepare 

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) RawDump 

func (s *StateDB) RawDump() Dump

func (*StateDB) Reset 

func (s *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 (s *StateDB) RevertToSnapshot(revid int)

RevertToSnapshot reverts all state changes made since the given revision.

func (*StateDB) SetBalance 

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

func (*StateDB) SetCode 

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

func (*StateDB) SetCredits 

func (s *StateDB) SetCredits(addr common.Address, credits uint64)

func (*StateDB) SetNonce 

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

func (*StateDB) SetState 

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

func (*StateDB) SetStorageRoot 

func (s *StateDB) SetStorageRoot(addr common.Address, storageRoot common.Hash)

func (*StateDB) SetTokenBalance 

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

func (*StateDB) Snapshot 

func (s *StateDB) Snapshot() int

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

func (*StateDB) StorageTrie 

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 

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) SubTokenBalance 

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

SubBalance subtracts amount from the account associated with addr.

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.

func (*StateDB) TxHash 

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

TxHash get the current Transaction Hash.

func (*StateDB) UpdateCandidateScore 

func (st *StateDB) UpdateCandidateScore(pubkey crypto.PubKey, op int, maxScore, height int64, logger log.Logger)

UpdateCandidateScore update the canidate score in canidate contract

type Storage 

type Storage map[common.Hash][]byte

func (Storage) Copy 

func (s Storage) Copy() Storage

func (Storage) String 

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

type Trie 

type Trie interface {
	TryGet(key []byte) ([]byte, error)
	TryUpdate(key, value []byte) error
	TryDelete(key []byte) error
	Commit(onleaf trie.LeafCallback, height uint64) (common.Hash, error)
	Hash() common.Hash
	NodeIterator(startKey []byte) trie.NodeIterator
	GetKey([]byte) []byte // TODO(fjl): remove this when SecureTrie is removed
	Prove(key []byte, fromLevel uint, proofDb dbm.Putter) error
}

Trie is a Ethereum Merkle Trie.

type TrieDB 

type TrieDB interface {
	DiskDB() trie.DatabaseReader
	InsertBlob(hash common.Hash, blob []byte)
	Node(hash common.Hash) ([]byte, error)
	Nodes() []common.Hash
	Reference(child common.Hash, parent common.Hash)
	Commit(node common.Hash, report bool) error
}

type ValidatorJSON 

type ValidatorJSON struct {
	PubKey      string         `json:"pub_key"`
	CoinBase    common.Address `json:"coinbase"`
	VotingPower int64          `json:"voting_power"`
}

ValidatorJSON used for json encoded in validator contract

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