state

package
v0.0.2-alpha Latest Latest
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 Go to latest Published: Jun 13, 2018 License: MIT Imports: 16 Imported by: 22

Documentation

Overview

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

Index

Constants

View Source 
const (
	CandidateStatusOffline = 0x01
	CandidateStatusOnline  = 0x02
)

Variables

View Source 
var (
	BalanceChangeChan = make(chan BalanceChangeStruct, 10)
)
View Source 
var (
	CandidateMaxAbsentTimes = uint(12)
)
View Source 
var MaxTrieCacheGen = uint16(120)

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

Functions

func EmitBalanceChange 

func EmitBalanceChange(address types.Address, coin types.CoinSymbol, balance *big.Int)

Types

type Account 

type Account struct {
	Nonce   uint64
	Balance Balances
	Root    types.Hash // merkle root of the storage trie
}

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

type Balance 

type Balance struct {
	Coin   types.CoinSymbol
	Amount *big.Int
}

type BalanceChangeStruct 

type BalanceChangeStruct struct {
	Address types.Address
	Coin    types.CoinSymbol
	Balance *big.Int
}

func (BalanceChangeStruct) MarshalJSON 

func (s BalanceChangeStruct) MarshalJSON() ([]byte, error)

type Balances 

type Balances struct {
	Data map[types.CoinSymbol]*big.Int
}

func (*Balances) DecodeRLP 

func (b *Balances) DecodeRLP(s *rlp.Stream) error

func (Balances) EncodeRLP 

func (b Balances) EncodeRLP(w io.Writer) error

type Candidate 

type Candidate struct {
	CandidateAddress types.Address
	TotalStake       *big.Int
	PubKey           types.Pubkey
	Commission       uint
	AccumReward      *big.Int
	Stakes           []Stake
	CreatedAtBlock   uint
	Status           byte
	AbsentTimes      uint
}

func (Candidate) GetStakeOfAddress 

func (candidate Candidate) GetStakeOfAddress(addr types.Address) *Stake

func (Candidate) String 

func (candidate Candidate) String() string

type Candidates 

type Candidates []Candidate

type Code 

type Code []byte

func (Code) String 

func (self Code) String() string

type Coin 

type Coin struct {
	Name           string
	Symbol         types.CoinSymbol
	Volume         *big.Int
	Crr            uint
	ReserveCoin    types.CoinSymbol
	ReserveBalance *big.Int
	Creator        types.Address
}

func (Coin) String 

func (coin Coin) String() string

type Database 

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

	// OpenStorageTrie opens the storage trie of an account.
	OpenStorageTrie(addrHash, root types.Hash) (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 mintdb.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 FrozenFund 

type FrozenFund struct {
	Address      types.Address
	CandidateKey []byte
	Value        *big.Int
}

frozen funds are only for BaseCoin

type FrozenFunds 

type FrozenFunds struct {
	BlockHeight int64
	List        []FrozenFund
}

func (FrozenFunds) String 

func (f FrozenFunds) String() string

type Stake 

type Stake struct {
	Owner types.Address
	Value *big.Int
}

func (*Stake) MarshalJSON 

func (s *Stake) MarshalJSON() ([]byte, error)

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: * Coins * Accounts

func New 

func New(root types.Hash, db Database) (*StateDB, error)

Create a new state from a given trie

func (*StateDB) AddAccumReward 

func (s *StateDB) AddAccumReward(pubkey types.Pubkey, reward *big.Int)

func (*StateDB) AddBalance 

func (s *StateDB) AddBalance(addr types.Address, coinSymbol types.CoinSymbol, amount *big.Int)

AddBalance adds amount to the account associated with addr

func (*StateDB) AddCoinReserve 

func (s *StateDB) AddCoinReserve(symbol types.CoinSymbol, value *big.Int)

func (*StateDB) AddCoinVolume 

func (s *StateDB) AddCoinVolume(symbol types.CoinSymbol, value *big.Int)

func (*StateDB) CandidateExists 

func (s *StateDB) CandidateExists(key types.Pubkey) bool

func (*StateDB) CoinExists 

func (s *StateDB) CoinExists(symbol types.CoinSymbol) bool

func (*StateDB) Commit 

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

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

func (*StateDB) CreateCandidate 

func (s *StateDB) CreateCandidate(
	address types.Address,
	pubkey types.Pubkey,
	commission uint,
	currentBlock uint,
	initialStake *big.Int) *stateCandidates

func (*StateDB) CreateCoin 

func (s *StateDB) CreateCoin(
	symbol types.CoinSymbol,
	name string,
	volume *big.Int,
	crr uint,
	reserve *big.Int,
	creator types.Address) *stateCoin

func (*StateDB) Database 

func (s *StateDB) Database() Database

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

func (*StateDB) Delegate 

func (s *StateDB) Delegate(sender types.Address, pubkey []byte, value *big.Int)

func (*StateDB) Empty 

func (s *StateDB) 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 (*StateDB) Error 

func (s *StateDB) Error() error

func (*StateDB) GetBalance 

func (s *StateDB) GetBalance(addr types.Address, coinSymbol types.CoinSymbol) *big.Int

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

func (*StateDB) GetBalances 

func (s *StateDB) GetBalances(addr types.Address) Balances

func (*StateDB) GetNonce 

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

func (*StateDB) GetOrNewStateFrozenFunds 

func (s *StateDB) GetOrNewStateFrozenFunds(blockHeight uint64) *stateFrozenFund

func (*StateDB) GetOrNewStateObject 

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

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

func (*StateDB) GetStateCandidate 

func (s *StateDB) GetStateCandidate(key types.Pubkey) *Candidate

func (*StateDB) GetStateCoin 

func (s *StateDB) GetStateCoin(symbol types.CoinSymbol) *stateCoin

func (*StateDB) GetStateFrozenFunds 

func (s *StateDB) GetStateFrozenFunds(blockHeight uint64) *stateFrozenFund

func (*StateDB) GetValidators 

func (s *StateDB) GetValidators(count int) ([]abci.Validator, []Candidate)

func (*StateDB) IsCheckUsed 

func (s *StateDB) IsCheckUsed(check *check.Check) bool

func (*StateDB) MarkStateCandidateDirty 

func (s *StateDB) MarkStateCandidateDirty()

func (*StateDB) MarkStateCoinDirty 

func (s *StateDB) MarkStateCoinDirty(symbol types.CoinSymbol)

func (*StateDB) MarkStateFrozenFundsDirty 

func (s *StateDB) MarkStateFrozenFundsDirty(blockHeight uint64)

func (*StateDB) MarkStateObjectDirty 

func (s *StateDB) MarkStateObjectDirty(addr types.Address)

MarkStateObjectDirty adds the specified object to the dirty map to avoid costly state object cache iteration to find a handful of modified ones.

func (*StateDB) PayRewards 

func (s *StateDB) PayRewards()

func (*StateDB) PunishByzantineCandidate 

func (s *StateDB) PunishByzantineCandidate(PubKey []byte)

func (*StateDB) RemoveFrozenFundsWithPubKey 

func (s *StateDB) RemoveFrozenFundsWithPubKey(fromBlock uint64, toBlock uint64, PubKey []byte)

func (*StateDB) SetBalance 

func (s *StateDB) SetBalance(addr types.Address, coinSymbol types.CoinSymbol, amount *big.Int)

func (*StateDB) SetCandidateOffline 

func (s *StateDB) SetCandidateOffline(pubkey []byte)

func (*StateDB) SetCandidateOnline 

func (s *StateDB) SetCandidateOnline(pubkey []byte)

func (*StateDB) SetNonce 

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

func (*StateDB) SetValidatorAbsent 

func (s *StateDB) SetValidatorAbsent(pubkey types.Pubkey)

func (*StateDB) SetValidatorPresent 

func (s *StateDB) SetValidatorPresent(pubkey types.Pubkey)

func (*StateDB) SubBalance 

func (s *StateDB) SubBalance(addr types.Address, coinSymbol types.CoinSymbol, amount *big.Int)

SubBalance subtracts amount from the account associated with addr

func (*StateDB) SubCoinReserve 

func (s *StateDB) SubCoinReserve(symbol types.CoinSymbol, value *big.Int)

func (*StateDB) SubCoinVolume 

func (s *StateDB) SubCoinVolume(symbol types.CoinSymbol, value *big.Int)

func (*StateDB) SubStake 

func (s *StateDB) SubStake(sender types.Address, pubkey []byte, value *big.Int)

func (*StateDB) UseCheck 

func (s *StateDB) UseCheck(check *check.Check)

type Storage 

type Storage map[types.Hash]types.Hash

func (Storage) Copy 

func (self Storage) Copy() Storage

func (Storage) String 

func (self 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) (types.Hash, error)
	Hash() types.Hash
	NodeIterator(startKey []byte) trie.NodeIterator
	GetKey([]byte) []byte // TODO(fjl): remove this when SecureTrie is removed
	Prove(key []byte, fromLevel uint, proofDb mintdb.Putter) error
}

Trie is a Ethereum Merkle Trie.

Source Files

View all Source files

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