tradingstate

package
v0.0.1 Latest Latest
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 Go to latest Published: Aug 9, 2023 License: GPL-3.0 Imports: 22 Imported by: 0

Documentation

Overview

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

Index

Constants

View Source 
const (
	OrderStatusNew           = "NEW"
	OrderStatusOpen          = "OPEN"
	OrderStatusPartialFilled = "PARTIAL_FILLED"
	OrderStatusFilled        = "FILLED"
	OrderStatusCancelled     = "CANCELLED"
	OrderStatusRejected      = "REJECTED"
)
View Source 
const (
	TradeStatusSuccess = "SUCCESS"

	TradeTakerOrderHash = "takerOrderHash"
	TradeMakerOrderHash = "makerOrderHash"
	TradeTimestamp      = "timestamp"
	TradeQuantity       = "quantity"
	TradeMakerExchange  = "makerExAddr"
	TradeMaker          = "uAddr"
	TradeBaseToken      = "bToken"
	TradeQuoteToken     = "qToken"
	TradePrice          = "tradedPrice"
	MakerOrderType      = "makerOrderType"
	MakerFee            = "makerFee"
	TakerFee            = "takerFee"
)
View Source 
const DefaultFeeRate = 10 // 10 / XDCXBaseFee = 10 / 10000 = 0.1%
View Source 
const (
	OrderCacheLimit = 10000
)

Variables

View Source 
var (
	EmptyRoot = common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
	Ask       = "SELL"
	Bid       = "BUY"
	Market    = "MO"
	Limit     = "LO"
	Cancel    = "CANCELLED"
	OrderNew  = "NEW"
)
View Source 
var (
	ErrInvalidSignature = errors.New("verify order: invalid signature")
	ErrInvalidPrice     = errors.New("verify order: invalid price")
	ErrInvalidQuantity  = errors.New("verify order: invalid quantity")
	ErrInvalidRelayer   = errors.New("verify order: invalid relayer")
	ErrInvalidOrderType = errors.New("verify order: unsupported order type")
	ErrInvalidOrderSide = errors.New("verify order: invalid order side")
	ErrInvalidStatus    = errors.New("verify order: invalid status")

	// supported order types
	MatchingOrderType = map[string]bool{
		Market: true,
		Limit:  true,
	}
)
View Source 
var (
	TokenMappingSlot = map[string]uint64{
		"balances": 0,
	}
	RelayerMappingSlot = map[string]uint64{
		"CONTRACT_OWNER":       0,
		"MaximumRelayers":      1,
		"MaximumTokenList":     2,
		"RELAYER_LIST":         3,
		"RELAYER_COINBASES":    4,
		"RESIGN_REQUESTS":      5,
		"RELAYER_ON_SALE_LIST": 6,
		"RelayerCount":         7,
		"MinimumDeposit":       8,
	}
	RelayerStructMappingSlot = map[string]*big.Int{
		"_deposit":    big.NewInt(0),
		"_fee":        big.NewInt(1),
		"_fromTokens": big.NewInt(2),
		"_toTokens":   big.NewInt(3),
		"_index":      big.NewInt(4),
		"_owner":      big.NewInt(5),
	}
)
View Source 
var EmptyExchangeOnject = tradingExchangeObject{
	Nonce:   0,
	AskRoot: EmptyHash,
	BidRoot: EmptyHash,
}
View Source 
var EmptyHash = common.Hash{}
View Source 
var EmptyOrder = OrderItem{
	Quantity: Zero,
}
View Source 
var EmptyOrderList = orderList{
	Volume: nil,
	Root:   EmptyHash,
}
View Source 
var ErrQuantityTradeTooSmall = errors.New("quantity trade too small")
View Source 
var MaxTrieCacheGen = uint16(120)

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

View Source 
var One = big.NewInt(1)
View Source 
var Zero = big.NewInt(0)

Functions

func Add 

func Add(x, y *big.Int) *big.Int

func AddTokenBalance 

func AddTokenBalance(addr common.Address, value *big.Int, token common.Address, statedb *state.StateDB) error

func CheckAddTokenBalance 

func CheckAddTokenBalance(addr common.Address, value *big.Int, token common.Address, statedb *state.StateDB, mapBalances map[common.Address]map[common.Address]*big.Int) (*big.Int, error)

func CheckRelayerFee 

func CheckRelayerFee(relayer common.Address, fee *big.Int, statedb *state.StateDB) error

func CheckSubRelayerFee 

func CheckSubRelayerFee(relayer common.Address, fee *big.Int, statedb *state.StateDB, mapBalances map[common.Address]*big.Int) (*big.Int, error)

func CheckSubTokenBalance 

func CheckSubTokenBalance(addr common.Address, value *big.Int, token common.Address, statedb *state.StateDB, mapBalances map[common.Address]map[common.Address]*big.Int) (*big.Int, error)

func CloneBigInt 

func CloneBigInt(bigInt *big.Int) *big.Int

func DecodeBytesItem 

func DecodeBytesItem(bytes []byte, val interface{}) error

func Div 

func Div(x, y *big.Int) *big.Int

func EncodeBytesItem 

func EncodeBytesItem(val interface{}) ([]byte, error)

func EncodeTxMatchesBatch 

func EncodeTxMatchesBatch(txMatchBatch TxMatchBatch) ([]byte, error)

func Exp 

func Exp(x, y *big.Int) *big.Int

func GetAllCoinbases 

func GetAllCoinbases(statedb *state.StateDB) []common.Address

func GetAllTradingPairs 

func GetAllTradingPairs(statedb *state.StateDB) (map[common.Hash]bool, error)

func GetBaseTokenAtIndex 

func GetBaseTokenAtIndex(relayer common.Address, statedb *state.StateDB, index uint64) common.Address

func GetBaseTokenLength 

func GetBaseTokenLength(relayer common.Address, statedb *state.StateDB) uint64

func GetExRelayerFee 

func GetExRelayerFee(relayer common.Address, statedb *state.StateDB) *big.Int

func GetLocMappingAtKey 

func GetLocMappingAtKey(key common.Hash, slot uint64) *big.Int

func GetMatchingResultCacheKey 

func GetMatchingResultCacheKey(order *OrderItem) common.Hash

func GetOrderHistoryKey 

func GetOrderHistoryKey(baseToken, quoteToken common.Address, orderHash common.Hash) common.Hash

use orderHash instead of orderId because both takerOrders don't have orderId

func GetQuoteTokenAtIndex 

func GetQuoteTokenAtIndex(relayer common.Address, statedb *state.StateDB, index uint64) common.Address

func GetQuoteTokenLength 

func GetQuoteTokenLength(relayer common.Address, statedb *state.StateDB) uint64

func GetRelayerCount 

func GetRelayerCount(statedb *state.StateDB) uint64

func GetRelayerOwner 

func GetRelayerOwner(relayer common.Address, statedb *state.StateDB) common.Address

func GetTokenBalance 

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

func GetTradingOrderBookHash 

func GetTradingOrderBookHash(baseToken common.Address, quoteToken common.Address) common.Hash

func IsResignedRelayer 

func IsResignedRelayer(relayer common.Address, statedb *state.StateDB) bool

return true if relayer request to resign and have not withdraw locked fund

func IsValidRelayer 

func IsValidRelayer(statedb *state.StateDB, address common.Address) bool

func Max 

func Max(a, b *big.Int) *big.Int

func Mul 

func Mul(x, y *big.Int) *big.Int

func Neg 

func Neg(x *big.Int) *big.Int

func SetSubRelayerFee 

func SetSubRelayerFee(relayer common.Address, balance *big.Int, fee *big.Int, statedb *state.StateDB)

func SetTokenBalance 

func SetTokenBalance(addr common.Address, balance *big.Int, token common.Address, statedb *state.StateDB) error

func Sub 

func Sub(x, y *big.Int) *big.Int

func SubRelayerFee 

func SubRelayerFee(relayer common.Address, fee *big.Int, statedb *state.StateDB) error

func SubTokenBalance 

func SubTokenBalance(addr common.Address, value *big.Int, token common.Address, statedb *state.StateDB) error

func ToBigInt 

func ToBigInt(s string) *big.Int

func ToJSON 

func ToJSON(object interface{}, args ...string) string

ToJSON : log json string

func VerifyBalance 

func VerifyBalance(statedb *state.StateDB, XDCxStateDb *TradingStateDB, order *types.OrderTransaction, baseDecimal, quoteDecimal *big.Int) error

func VerifyPair 

func VerifyPair(statedb *state.StateDB, exchangeAddress, baseToken, quoteToken common.Address) error

Types

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() *trie.Database
}

Database wraps access to tries and contract code.

func NewDatabase 

func NewDatabase(db ethdb.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 DumpLendingBook 

type DumpLendingBook struct {
	Volume       *big.Int
	LendingBooks map[common.Hash]DumpOrderList
}

type DumpOrderBookInfo 

type DumpOrderBookInfo struct {
	LastPrice              *big.Int
	LendingCount           *big.Int
	MediumPrice            *big.Int
	MediumPriceBeforeEpoch *big.Int
	Nonce                  uint64
	TotalQuantity          *big.Int
	BestAsk                *big.Int
	BestBid                *big.Int
	LowestLiquidationPrice *big.Int
}

type DumpOrderList 

type DumpOrderList struct {
	Volume *big.Int
	Orders map[*big.Int]*big.Int
}

type EpochPriceItem 

type EpochPriceItem struct {
	Epoch     uint64      `bson:"epoch" json:"epoch"`
	Orderbook common.Hash `bson:"orderbook" json:"orderbook"`
	Hash      common.Hash `bson:"hash" json:"hash"`
	Price     *big.Int    `bson:"price" json:"price"`
}

func (*EpochPriceItem) ComputeHash 

func (item *EpochPriceItem) ComputeHash() common.Hash

func (*EpochPriceItem) GetBSON 

func (item *EpochPriceItem) GetBSON() (interface{}, error)

func (*EpochPriceItem) SetBSON 

func (item *EpochPriceItem) SetBSON(raw bson.Raw) error

type EpochPriceItemBSON 

type EpochPriceItemBSON struct {
	Epoch     string `bson:"epoch" json:"epoch"`
	Orderbook string `bson:"orderbook" json:"orderbook"`
	Hash      string `bson:"hash" json:"hash"` // Keccak256Hash of Epoch and orderbook, used as an index of this collection
	Price     string `bson:"price" json:"price"`
}

type MatchingResult 

type MatchingResult struct {
	Trades  []map[string]string
	Rejects []*OrderItem
}

type OrderHistoryItem 

type OrderHistoryItem struct {
	TxHash       common.Hash
	FilledAmount *big.Int
	Status       string
	UpdatedAt    time.Time
}

type OrderItem 

type OrderItem struct {
	Quantity        *big.Int       `json:"quantity,omitempty"`
	Price           *big.Int       `json:"price,omitempty"`
	ExchangeAddress common.Address `json:"exchangeAddress,omitempty"`
	UserAddress     common.Address `json:"userAddress,omitempty"`
	BaseToken       common.Address `json:"baseToken,omitempty"`
	QuoteToken      common.Address `json:"quoteToken,omitempty"`
	Status          string         `json:"status,omitempty"`
	Side            string         `json:"side,omitempty"`
	Type            string         `json:"type,omitempty"`
	Hash            common.Hash    `json:"hash,omitempty"`
	TxHash          common.Hash    `json:"txHash,omitempty"`
	Signature       *Signature     `json:"signature,omitempty"`
	FilledAmount    *big.Int       `json:"filledAmount,omitempty"`
	Nonce           *big.Int       `json:"nonce,omitempty"`
	CreatedAt       time.Time      `json:"createdAt,omitempty"`
	UpdatedAt       time.Time      `json:"updatedAt,omitempty"`
	OrderID         uint64         `json:"orderID,omitempty"`
	ExtraData       string         `json:"extraData,omitempty"`
}

OrderItem : info that will be store in database

func (*OrderItem) GetBSON 

func (o *OrderItem) GetBSON() (interface{}, error)

func (*OrderItem) SetBSON 

func (o *OrderItem) SetBSON(raw bson.Raw) error

func (*OrderItem) VerifyBasicOrderInfo 

func (o *OrderItem) VerifyBasicOrderInfo() error

VerifyBasicOrderInfo verify basic info

func (*OrderItem) VerifyOrder 

func (o *OrderItem) VerifyOrder(state *state.StateDB) error

VerifyOrder verify orderItem

type OrderItemBSON 

type OrderItemBSON struct {
	Quantity        string           `json:"quantity,omitempty" bson:"quantity"`
	Price           string           `json:"price,omitempty" bson:"price"`
	ExchangeAddress string           `json:"exchangeAddress,omitempty" bson:"exchangeAddress"`
	UserAddress     string           `json:"userAddress,omitempty" bson:"userAddress"`
	BaseToken       string           `json:"baseToken,omitempty" bson:"baseToken"`
	QuoteToken      string           `json:"quoteToken,omitempty" bson:"quoteToken"`
	Status          string           `json:"status,omitempty" bson:"status"`
	Side            string           `json:"side,omitempty" bson:"side"`
	Type            string           `json:"type,omitempty" bson:"type"`
	Hash            string           `json:"hash,omitempty" bson:"hash"`
	TxHash          string           `json:"txHash,omitempty" bson:"txHash"`
	Signature       *SignatureRecord `json:"signature,omitempty" bson:"signature"`
	FilledAmount    string           `json:"filledAmount,omitempty" bson:"filledAmount"`
	Nonce           string           `json:"nonce,omitempty" bson:"nonce"`
	CreatedAt       time.Time        `json:"createdAt,omitempty" bson:"createdAt"`
	UpdatedAt       time.Time        `json:"updatedAt,omitempty" bson:"updatedAt"`
	OrderID         string           `json:"orderID,omitempty" bson:"orderID"`
	ExtraData       string           `json:"extraData,omitempty" bson:"extraData"`
}

type SettleBalance 

type SettleBalance struct {
	Taker TradeResult
	Maker TradeResult
}

func GetSettleBalance 

func GetSettleBalance(quotePrice *big.Int, takerSide string, takerFeeRate *big.Int, baseToken, quoteToken common.Address, makerPrice *big.Int, makerFeeRate *big.Int, baseTokenDecimal *big.Int, quoteTokenDecimal *big.Int, quantityToTrade *big.Int) (*SettleBalance, error)

func (*SettleBalance) String 

func (settleBalance *SettleBalance) String() string

type Signature 

type Signature struct {
	V byte
	R common.Hash
	S common.Hash
}

Signature struct

func (*Signature) MarshalSignature 

func (s *Signature) MarshalSignature() ([]byte, error)

MarshalSignature marshals the signature struct to []byte

func (*Signature) Verify 

func (s *Signature) Verify(hash common.Hash) (common.Address, error)

Verify returns the address that corresponds to the given signature and signed message

type SignatureRecord 

type SignatureRecord struct {
	V byte   `json:"V" bson:"V"`
	R string `json:"R" bson:"R"`
	S string `json:"S" bson:"S"`
}

type Trade 

type Trade struct {
	Taker          common.Address `json:"taker" bson:"taker"`
	Maker          common.Address `json:"maker" bson:"maker"`
	BaseToken      common.Address `json:"baseToken" bson:"baseToken"`
	QuoteToken     common.Address `json:"quoteToken" bson:"quoteToken"`
	MakerOrderHash common.Hash    `json:"makerOrderHash" bson:"makerOrderHash"`
	TakerOrderHash common.Hash    `json:"takerOrderHash" bson:"takerOrderHash"`
	MakerExchange  common.Address `json:"makerExchange" bson:"makerExchange"`
	TakerExchange  common.Address `json:"takerExchange" bson:"takerExchange"`
	Hash           common.Hash    `json:"hash" bson:"hash"`
	TxHash         common.Hash    `json:"txHash" bson:"txHash"`
	PricePoint     *big.Int       `json:"pricepoint" bson:"pricepoint"`
	Amount         *big.Int       `json:"amount" bson:"amount"`
	MakeFee        *big.Int       `json:"makeFee" bson:"makeFee"`
	TakeFee        *big.Int       `json:"takeFee" bson:"takeFee"`
	Status         string         `json:"status" bson:"status"`
	CreatedAt      time.Time      `json:"createdAt" bson:"createdAt"`
	UpdatedAt      time.Time      `json:"updatedAt" bson:"updatedAt"`
	TakerOrderSide string         `json:"takerOrderSide" bson:"takerOrderSide"`
	TakerOrderType string         `json:"takerOrderType" bson:"takerOrderType"`
	MakerOrderType string         `json:"makerOrderType" bson:"makerOrderType"`
}

func (*Trade) ComputeHash 

func (t *Trade) ComputeHash() common.Hash

ComputeHash returns hashes the trade The OrderHash, Amount, Taker and TradeNonce attributes must be set before attempting to compute the trade orderBookHash

func (*Trade) GetBSON 

func (t *Trade) GetBSON() (interface{}, error)

func (*Trade) SetBSON 

func (t *Trade) SetBSON(raw bson.Raw) error

type TradeBSON 

type TradeBSON struct {
	Taker          string    `json:"taker" bson:"taker"`
	Maker          string    `json:"maker" bson:"maker"`
	BaseToken      string    `json:"baseToken" bson:"baseToken"`
	QuoteToken     string    `json:"quoteToken" bson:"quoteToken"`
	MakerOrderHash string    `json:"makerOrderHash" bson:"makerOrderHash"`
	TakerOrderHash string    `json:"takerOrderHash" bson:"takerOrderHash"`
	MakerExchange  string    `json:"makerExchange" bson:"makerExchange"`
	TakerExchange  string    `json:"takerExchange" bson:"takerExchange"`
	Hash           string    `json:"hash" bson:"hash"`
	TxHash         string    `json:"txHash" bson:"txHash"`
	Amount         string    `json:"amount" bson:"amount"`
	MakeFee        string    `json:"makeFee" bson:"makeFee"`
	TakeFee        string    `json:"takeFee" bson:"takeFee"`
	PricePoint     string    `json:"pricepoint" bson:"pricepoint"`
	Status         string    `json:"status" bson:"status"`
	CreatedAt      time.Time `json:"createdAt" bson:"createdAt"`
	UpdatedAt      time.Time `json:"updatedAt" bson:"updatedAt"`
	TakerOrderSide string    `json:"takerOrderSide" bson:"takerOrderSide"`
	TakerOrderType string    `json:"takerOrderType" bson:"takerOrderType"`
	MakerOrderType string    `json:"makerOrderType" bson:"makerOrderType"`
}

type TradeResult 

type TradeResult struct {
	Fee      *big.Int
	InToken  common.Address
	InTotal  *big.Int
	OutToken common.Address
	OutTotal *big.Int
}

type TradingStateDB 

type TradingStateDB 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) (*TradingStateDB, error)

Create a new state from a given trie.

func (*TradingStateDB) CancelOrder 

func (self *TradingStateDB) CancelOrder(orderBook common.Hash, order *OrderItem) error

func (*TradingStateDB) Commit 

func (s *TradingStateDB) Commit() (root common.Hash, err error)

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

func (*TradingStateDB) Copy 

func (self *TradingStateDB) Copy() *TradingStateDB

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

func (*TradingStateDB) Database 

func (self *TradingStateDB) Database() Database

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

func (*TradingStateDB) DumpAskTrie 

func (self *TradingStateDB) DumpAskTrie(orderBook common.Hash) (map[*big.Int]DumpOrderList, error)

func (*TradingStateDB) DumpBidTrie 

func (self *TradingStateDB) DumpBidTrie(orderBook common.Hash) (map[*big.Int]DumpOrderList, error)

func (*TradingStateDB) DumpLiquidationPriceTrie 

func (self *TradingStateDB) DumpLiquidationPriceTrie(orderBook common.Hash) (map[*big.Int]DumpLendingBook, error)

func (*TradingStateDB) DumpOrderBookInfo 

func (self *TradingStateDB) DumpOrderBookInfo(orderBook common.Hash) (*DumpOrderBookInfo, error)

func (*TradingStateDB) Empty 

func (self *TradingStateDB) Empty(addr common.Hash) bool

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

func (*TradingStateDB) Error 

func (self *TradingStateDB) Error() error

func (*TradingStateDB) Exist 

func (self *TradingStateDB) Exist(addr common.Hash) bool

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

func (*TradingStateDB) Finalise 

func (s *TradingStateDB) Finalise()

Finalise finalises the state by removing the self destructed objects and clears the journal as well as the refunds.

func (*TradingStateDB) GetAllLowerLiquidationPriceData 

func (self *TradingStateDB) GetAllLowerLiquidationPriceData(orderBook common.Hash, limit *big.Int) map[*big.Int]map[common.Hash][]common.Hash

func (*TradingStateDB) GetAsks 

func (self *TradingStateDB) GetAsks(orderBook common.Hash) (map[*big.Int]*big.Int, error)

func (*TradingStateDB) GetBestAskPrice 

func (self *TradingStateDB) GetBestAskPrice(orderBook common.Hash) (*big.Int, *big.Int)

func (*TradingStateDB) GetBestBidPrice 

func (self *TradingStateDB) GetBestBidPrice(orderBook common.Hash) (*big.Int, *big.Int)

func (*TradingStateDB) GetBestOrderIdAndAmount 

func (self *TradingStateDB) GetBestOrderIdAndAmount(orderBook common.Hash, price *big.Int, side string) (common.Hash, *big.Int, error)

func (*TradingStateDB) GetBids 

func (self *TradingStateDB) GetBids(orderBook common.Hash) (map[*big.Int]*big.Int, error)

func (*TradingStateDB) GetHighestLiquidationPriceData 

func (self *TradingStateDB) GetHighestLiquidationPriceData(orderBook common.Hash, price *big.Int) (*big.Int, map[common.Hash][]common.Hash)

func (*TradingStateDB) GetLastPrice 

func (self *TradingStateDB) GetLastPrice(addr common.Hash) *big.Int

func (*TradingStateDB) GetMediumPriceAndTotalAmount 

func (self *TradingStateDB) GetMediumPriceAndTotalAmount(addr common.Hash) (*big.Int, *big.Int)

func (*TradingStateDB) GetMediumPriceBeforeEpoch 

func (self *TradingStateDB) GetMediumPriceBeforeEpoch(addr common.Hash) *big.Int

func (*TradingStateDB) GetNonce 

func (self *TradingStateDB) GetNonce(addr common.Hash) uint64

func (*TradingStateDB) GetOrNewStateExchangeObject 

func (self *TradingStateDB) GetOrNewStateExchangeObject(addr common.Hash) *tradingExchanges

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

func (*TradingStateDB) GetOrder 

func (self *TradingStateDB) GetOrder(orderBook common.Hash, orderId common.Hash) OrderItem

func (*TradingStateDB) GetVolume 

func (self *TradingStateDB) GetVolume(orderBook common.Hash, price *big.Int, orderType string) *big.Int

func (*TradingStateDB) InsertLiquidationPrice 

func (self *TradingStateDB) InsertLiquidationPrice(orderBook common.Hash, price *big.Int, lendingBook common.Hash, tradeId uint64)

func (*TradingStateDB) InsertOrderItem 

func (self *TradingStateDB) InsertOrderItem(orderBook common.Hash, orderId common.Hash, order OrderItem)

func (*TradingStateDB) IntermediateRoot 

func (s *TradingStateDB) IntermediateRoot() common.Hash

IntermediateRoot computes the current root orderBookHash of the state trie. It is called in between transactions to get the root orderBookHash that goes into transaction receipts.

func (*TradingStateDB) MarkStateExchangeObjectDirty 

func (self *TradingStateDB) MarkStateExchangeObjectDirty(addr common.Hash)

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

func (*TradingStateDB) RemoveLiquidationPrice 

func (self *TradingStateDB) RemoveLiquidationPrice(orderBook common.Hash, price *big.Int, lendingBook common.Hash, tradeId uint64) error

func (*TradingStateDB) RevertToSnapshot 

func (self *TradingStateDB) RevertToSnapshot(revid int)

RevertToSnapshot reverts all state changes made since the given revision.

func (*TradingStateDB) SetLastPrice 

func (self *TradingStateDB) SetLastPrice(addr common.Hash, price *big.Int)

func (*TradingStateDB) SetMediumPrice 

func (self *TradingStateDB) SetMediumPrice(addr common.Hash, price *big.Int, quantity *big.Int)

func (*TradingStateDB) SetMediumPriceBeforeEpoch 

func (self *TradingStateDB) SetMediumPriceBeforeEpoch(addr common.Hash, price *big.Int)

func (*TradingStateDB) SetNonce 

func (self *TradingStateDB) SetNonce(addr common.Hash, nonce uint64)

func (*TradingStateDB) Snapshot 

func (self *TradingStateDB) Snapshot() int

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

func (*TradingStateDB) SubAmountOrderItem 

func (self *TradingStateDB) SubAmountOrderItem(orderBook common.Hash, orderId common.Hash, price *big.Int, amount *big.Int, side string) error

type Trie 

type Trie interface {
	TryGet(key []byte) ([]byte, error)
	TryGetBestLeftKeyAndValue() ([]byte, []byte, error)
	TryGetAllLeftKeyAndValue(limit []byte) ([][]byte, [][]byte, error)
	TryGetBestRightKeyAndValue() ([]byte, []byte, error)
	TryUpdate(key, value []byte) error
	TryDelete(key []byte) error
	Commit(onleaf trie.LeafCallback) (common.Hash, error)
	Hash() common.Hash
	NodeIterator(startKey []byte) trie.NodeIterator
	GetKey([]byte) []byte // TODO(fjl): remove this when XDCXTrie is removed
	Prove(key []byte, fromLevel uint, proofDb ethdb.KeyValueWriter) error
}

Trie is a Ethereum Merkle Trie.

type TxDataMatch 

type TxDataMatch struct {
	Order []byte // serialized data of order has been processed in this tx
}

func (TxDataMatch) DecodeOrder 

func (tx TxDataMatch) DecodeOrder() (*OrderItem, error)

type TxMatchBatch 

type TxMatchBatch struct {
	Data      []TxDataMatch
	Timestamp int64
	TxHash    common.Hash
}

func DecodeTxMatchesBatch 

func DecodeTxMatchesBatch(data []byte) (TxMatchBatch, error)

type XDCXManagedState 

type XDCXManagedState struct {
	*TradingStateDB
	// contains filtered or unexported fields
}

func ManageState 

func ManageState(statedb *TradingStateDB) *XDCXManagedState

XDCXManagedState returns a new managed state with the statedb as it's backing layer

func (*XDCXManagedState) GetNonce 

func (ms *XDCXManagedState) GetNonce(addr common.Hash) uint64

GetNonce returns the canonical nonce for the managed or unmanaged orderId.

Because GetNonce mutates the DB, we must take a write lock.

func (*XDCXManagedState) HasAccount 

func (ms *XDCXManagedState) HasAccount(addr common.Hash) bool

HasAccount returns whether the given address is managed or not

func (*XDCXManagedState) NewNonce 

func (ms *XDCXManagedState) NewNonce(addr common.Hash) uint64

NewNonce returns the new canonical nonce for the managed orderId

func (*XDCXManagedState) RemoveNonce 

func (ms *XDCXManagedState) RemoveNonce(addr common.Hash, n uint64)

RemoveNonce removed the nonce from the managed state and all future pending nonces

func (*XDCXManagedState) SetNonce 

func (ms *XDCXManagedState) SetNonce(addr common.Hash, nonce uint64)

SetNonce sets the new canonical nonce for the managed state

func (*XDCXManagedState) SetState 

func (ms *XDCXManagedState) SetState(statedb *TradingStateDB)

SetState sets the backing layer of the managed state

type XDCXTrie 

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

XDCXTrie wraps a trie with key hashing. In a secure trie, all access operations hash the key using keccak256. This prevents calling code from creating long chains of nodes that increase the access time.

Contrary to a regular trie, a XDCXTrie can only be created with New and must have an attached database. The database also stores the preimage of each key.

XDCXTrie is not safe for concurrent use.

func NewXDCXTrie 

func NewXDCXTrie(root common.Hash, db *trie.Database) (*XDCXTrie, error)

NewXDCXTrie creates a trie with an existing root node from a backing database and optional intermediate in-memory node pool.

If root is the zero hash or the sha3 hash of an empty string, the trie is initially empty. Otherwise, New will panic if db is nil and returns MissingNodeError if the root node cannot be found.

Accessing the trie loads nodes from the database or node pool on demand. Loaded nodes are kept around until their 'cache generation' expires. A new cache generation is created by each call to Commit. cachelimit sets the number of past cache generations to keep.

func (*XDCXTrie) Commit 

func (t *XDCXTrie) Commit(onleaf trie.LeafCallback) (root common.Hash, err error)

Commit writes all nodes and the secure hash pre-images to the trie's database. Nodes are stored with their sha3 hash as the key.

Committing flushes nodes from memory. Subsequent Get calls will load nodes from the database.

func (*XDCXTrie) Copy 

func (t *XDCXTrie) Copy() *XDCXTrie

func (*XDCXTrie) Delete 

func (t *XDCXTrie) Delete(key []byte)

Delete removes any existing value for key from the trie.

func (*XDCXTrie) Get 

func (t *XDCXTrie) Get(key []byte) []byte

Get returns the value for key stored in the trie. The value bytes must not be modified by the caller.

func (*XDCXTrie) GetKey 

func (t *XDCXTrie) GetKey(shaKey []byte) []byte

GetKey returns the sha3 preimage of a hashed key that was previously used to store a value.

func (*XDCXTrie) Hash 

func (t *XDCXTrie) Hash() common.Hash

func (*XDCXTrie) NodeIterator 

func (t *XDCXTrie) NodeIterator(start []byte) trie.NodeIterator

NodeIterator returns an iterator that returns nodes of the underlying trie. Iteration starts at the key after the given start key.

func (*XDCXTrie) Prove 

func (t *XDCXTrie) Prove(key []byte, fromLevel uint, proofDb ethdb.KeyValueWriter) error

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 node), ending with the node that proves the absence of the key.

func (*XDCXTrie) TryDelete 

func (t *XDCXTrie) TryDelete(key []byte) error

TryDelete removes any existing value for key from the trie. If a node was not found in the database, a MissingNodeError is returned.

func (*XDCXTrie) TryGet 

func (t *XDCXTrie) TryGet(key []byte) ([]byte, error)

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 MissingNodeError is returned.

func (*XDCXTrie) TryGetAllLeftKeyAndValue 

func (t *XDCXTrie) TryGetAllLeftKeyAndValue(limit []byte) ([][]byte, [][]byte, error)

func (*XDCXTrie) TryGetBestLeftKeyAndValue 

func (t *XDCXTrie) TryGetBestLeftKeyAndValue() ([]byte, []byte, error)

TryGetBestLeftKey returns the value of max left leaf If a node was not found in the database, a MissingNodeError is returned.

func (*XDCXTrie) TryGetBestRightKeyAndValue 

func (t *XDCXTrie) TryGetBestRightKeyAndValue() ([]byte, []byte, error)

TryGetBestRightKey returns the value of max left leaf If a node was not found in the database, a MissingNodeError is returned.

func (*XDCXTrie) TryUpdate 

func (t *XDCXTrie) TryUpdate(key, value []byte) error

TryUpdate associates key with value in the trie. Subsequent calls to Get will return value. If value has length zero, any existing value is deleted from the trie and calls to Get will return nil.

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 MissingNodeError is returned.

func (*XDCXTrie) Update 

func (t *XDCXTrie) Update(key, value []byte)

Update associates key with value in the trie. Subsequent calls to Get will return value. If value has length zero, any existing value is deleted from the trie and calls to Get will return nil.

The value bytes must not be modified by the caller while they are stored in the trie.

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