types

package
v12.0.0-rc4 Latest Latest
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 Go to latest Published: Sep 21, 2022 License: Apache-2.0 Imports: 16 Imported by: 0

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Index

Constants

View Source 
const (
	ModuleName = "twap"

	StoreKey          = ModuleName
	TransientStoreKey = "transient_" + ModuleName // this is silly we have to do this
	RouterKey         = ModuleName

	QuerierRoute = ModuleName
	// Contract: Coin denoms cannot contain this character
	KeySeparator = "|"
)

Variables

View Source 
var (
	ErrInvalidLengthGenesis        = fmt.Errorf("proto: negative length found during unmarshaling")
	ErrIntOverflowGenesis          = fmt.Errorf("proto: integer overflow")
	ErrUnexpectedEndOfGroupGenesis = fmt.Errorf("proto: unexpected end of group")
)
View Source 
var (

	// format is time | pool id | denom1 | denom2 | time
	// made for efficiently deleting records by time in pruning
	HistoricalTWAPTimeIndexPrefix = historicalTWAPTimeIndexNoSeparator + KeySeparator
	// format is pool id | denom1 | denom2 | time
	// made for efficiently getting records given (pool id, denom1, denom2) and time bounds
	HistoricalTWAPPoolIndexPrefix = historicalTWAPPoolIndexNoSeparator + KeySeparator
)
View Source 
var (
	KeyPruneEpochIdentifier    = []byte("PruneEpochIdentifier")
	KeyRecordHistoryKeepPeriod = []byte("RecordHistoryKeepPeriod")
)

Parameter store keys.

View Source 
var (
	ErrInvalidLengthTwapRecord        = fmt.Errorf("proto: negative length found during unmarshaling")
	ErrIntOverflowTwapRecord          = fmt.Errorf("proto: integer overflow")
	ErrUnexpectedEndOfGroupTwapRecord = fmt.Errorf("proto: unexpected end of group")
)
View Source 
var MaxSpotPrice = sdk.NewDec(2).Power(128).Sub(sdk.OneDec())

Functions

func AccumDiffDivDuration 

func AccumDiffDivDuration(accumDiff sdk.Dec, timeDelta time.Duration) sdk.Dec

AccumDiffDivDuration returns the accumulated difference divided by the the time delta, that is the spot price between the current and last TWAP record.

func FormatHistoricalPoolIndexTWAPKey 

func FormatHistoricalPoolIndexTWAPKey(poolId uint64, denom1, denom2 string, accumulatorWriteTime time.Time) []byte

func FormatHistoricalPoolIndexTimePrefix 

func FormatHistoricalPoolIndexTimePrefix(poolId uint64, denom1, denom2 string) []byte

func FormatHistoricalPoolIndexTimeSuffix 

func FormatHistoricalPoolIndexTimeSuffix(poolId uint64, denom1, denom2 string, accumulatorWriteTime time.Time) []byte

func FormatHistoricalTimeIndexTWAPKey 

func FormatHistoricalTimeIndexTWAPKey(accumulatorWriteTime time.Time, poolId uint64, denom1, denom2 string) []byte

TODO: Replace historical management with ORM, we currently accept 2x write amplification right now.

func FormatMostRecentTWAPKey 

func FormatMostRecentTWAPKey(poolId uint64, denom1, denom2 string) []byte

func GetAllUniqueDenomPairs 

func GetAllUniqueDenomPairs(denoms []string) ([]string, []string)

GetAllUniqueDenomPairs returns all unique pairs of denoms, where for every pair (X, Y), X >= Y. The pair (X,Y) should only appear once in the list

NOTE: Sorts the input denoms slice.

func LexicographicalOrderDenoms 

func LexicographicalOrderDenoms(denom0, denom1 string) (string, string, error)

LexicographicalOrderDenoms takes two denoms and returns them to be in lexicographically ascending order. In other words, the first returned denom string will be the lexicographically smaller of the two denoms. If the denoms are equal, an error will be returned.

func ParamKeyTable 

func ParamKeyTable() paramtypes.KeyTable

ParamTable for twap module.

func SpotPriceMulDuration 

func SpotPriceMulDuration(sp sdk.Dec, timeDelta time.Duration) sdk.Dec

SpotPriceMulDuration returns the spot price multiplied by the time delta, that is the spot price between the current and last TWAP record. A single second accounts for 1_000_000_000 when converted to int64.

Types

type AmmInterface 

type AmmInterface interface {
	GetPoolDenoms(ctx sdk.Context, poolId uint64) (denoms []string, err error)
	// CalculateSpotPrice returns the spot price of the quote asset in terms of the base asset,
	// using the specified pool.
	// E.g. if pool 1 traded 2 atom for 3 osmo, the quote asset was atom, and the base asset was osmo,
	// this would return 1.5. (Meaning that 1 atom costs 1.5 osmo)
	CalculateSpotPrice(ctx sdk.Context,
		poolID uint64,
		baseAssetDenom string,
		quoteAssetDenom string) (price sdk.Dec, err error)
}

AmmInterface is the functionality needed from a given pool ID, in order to maintain records and serve TWAPs.

type EndTimeInFutureError 

type EndTimeInFutureError struct {
	EndTime   time.Time
	BlockTime time.Time
}

func (EndTimeInFutureError) Error 

func (e EndTimeInFutureError) Error() string

type GenesisState 

type GenesisState struct {
	// twaps is the collection of all twap records.
	Twaps []TwapRecord `protobuf:"bytes,1,rep,name=twaps,proto3" json:"twaps"`
	// params is the container of twap parameters.
	Params Params `protobuf:"bytes,2,opt,name=params,proto3" json:"params"`
}

GenesisState defines the twap module's genesis state.

func DefaultGenesis 

func DefaultGenesis() *GenesisState

DefaultGenesis returns the default twap genesis state.

func NewGenesisState 

func NewGenesisState(params Params, twapRecords []TwapRecord) *GenesisState

NewGenesisState returns genesis state with the given parameters and twap records.

func (*GenesisState) Descriptor 

func (*GenesisState) Descriptor() ([]byte, []int)

func (*GenesisState) GetParams 

func (m *GenesisState) GetParams() Params

func (*GenesisState) GetTwaps 

func (m *GenesisState) GetTwaps() []TwapRecord

func (*GenesisState) Marshal 

func (m *GenesisState) Marshal() (dAtA []byte, err error)

func (*GenesisState) MarshalTo 

func (m *GenesisState) MarshalTo(dAtA []byte) (int, error)

func (*GenesisState) MarshalToSizedBuffer 

func (m *GenesisState) MarshalToSizedBuffer(dAtA []byte) (int, error)

func (*GenesisState) ProtoMessage 

func (*GenesisState) ProtoMessage()

func (*GenesisState) Reset 

func (m *GenesisState) Reset()

func (*GenesisState) Size 

func (m *GenesisState) Size() (n int)

func (*GenesisState) String 

func (m *GenesisState) String() string

func (*GenesisState) Unmarshal 

func (m *GenesisState) Unmarshal(dAtA []byte) error

func (*GenesisState) Validate 

func (g *GenesisState) Validate() error

Validate validates the genesis state. Returns nil on success, error otherwise.

func (*GenesisState) XXX_DiscardUnknown 

func (m *GenesisState) XXX_DiscardUnknown()

func (*GenesisState) XXX_Marshal 

func (m *GenesisState) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*GenesisState) XXX_Merge 

func (m *GenesisState) XXX_Merge(src proto.Message)

func (*GenesisState) XXX_Size 

func (m *GenesisState) XXX_Size() int

func (*GenesisState) XXX_Unmarshal 

func (m *GenesisState) XXX_Unmarshal(b []byte) error

type InvalidRecordCountError 

type InvalidRecordCountError struct {
	Actual   int
	Expected int
}

func (InvalidRecordCountError) Error 

func (e InvalidRecordCountError) Error() string

type KeySeparatorLengthError 

type KeySeparatorLengthError struct {
	ExpectedLength int
	ActualLength   int
}

func (KeySeparatorLengthError) Error 

func (e KeySeparatorLengthError) Error() string

type Params 

type Params struct {
	PruneEpochIdentifier    string        `protobuf:"bytes,1,opt,name=prune_epoch_identifier,json=pruneEpochIdentifier,proto3" json:"prune_epoch_identifier,omitempty"`
	RecordHistoryKeepPeriod time.Duration `` /* 170-byte string literal not displayed */
}

Params holds parameters for the twap module

func DefaultParams 

func DefaultParams() Params

default twap module parameters.

func NewParams 

func NewParams(pruneEpochIdentifier string, recordHistoryKeepPeriod time.Duration) Params

func (*Params) Descriptor 

func (*Params) Descriptor() ([]byte, []int)

func (*Params) GetPruneEpochIdentifier 

func (m *Params) GetPruneEpochIdentifier() string

func (*Params) GetRecordHistoryKeepPeriod 

func (m *Params) GetRecordHistoryKeepPeriod() time.Duration

func (*Params) Marshal 

func (m *Params) Marshal() (dAtA []byte, err error)

func (*Params) MarshalTo 

func (m *Params) MarshalTo(dAtA []byte) (int, error)

func (*Params) MarshalToSizedBuffer 

func (m *Params) MarshalToSizedBuffer(dAtA []byte) (int, error)

func (*Params) ParamSetPairs 

func (p *Params) ParamSetPairs() paramtypes.ParamSetPairs

Implements params.ParamSet.

func (*Params) ProtoMessage 

func (*Params) ProtoMessage()

func (*Params) Reset 

func (m *Params) Reset()

func (*Params) Size 

func (m *Params) Size() (n int)

func (*Params) String 

func (m *Params) String() string

func (*Params) Unmarshal 

func (m *Params) Unmarshal(dAtA []byte) error

func (Params) Validate 

func (p Params) Validate() error

validate params.

func (*Params) XXX_DiscardUnknown 

func (m *Params) XXX_DiscardUnknown()

func (*Params) XXX_Marshal 

func (m *Params) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*Params) XXX_Merge 

func (m *Params) XXX_Merge(src proto.Message)

func (*Params) XXX_Size 

func (m *Params) XXX_Size() int

func (*Params) XXX_Unmarshal 

func (m *Params) XXX_Unmarshal(b []byte) error

type StartTimeAfterEndTimeError 

type StartTimeAfterEndTimeError struct {
	StartTime time.Time
	EndTime   time.Time
}

func (StartTimeAfterEndTimeError) Error 

func (e StartTimeAfterEndTimeError) Error() string

type TimeStringKeyFormatError 

type TimeStringKeyFormatError struct {
	Key string
	Err error
}

func (TimeStringKeyFormatError) Error 

func (e TimeStringKeyFormatError) Error() string

type TwapRecord 

type TwapRecord struct {
	PoolId uint64 `protobuf:"varint,1,opt,name=pool_id,json=poolId,proto3" json:"pool_id,omitempty"`
	// Lexicographically smaller denom of the pair
	Asset0Denom string `protobuf:"bytes,2,opt,name=asset0_denom,json=asset0Denom,proto3" json:"asset0_denom,omitempty"`
	// Lexicographically larger denom of the pair
	Asset1Denom string `protobuf:"bytes,3,opt,name=asset1_denom,json=asset1Denom,proto3" json:"asset1_denom,omitempty"`
	// height this record corresponds to, for debugging purposes
	Height int64 `protobuf:"varint,4,opt,name=height,proto3" json:"record_height" yaml:"record_height"`
	// This field should only exist until we have a global registry in the state
	// machine, mapping prior block heights within {TIME RANGE} to times.
	Time time.Time `protobuf:"bytes,5,opt,name=time,proto3,stdtime" json:"time" yaml:"record_time"`
	// We store the last spot prices in the struct, so that we can interpolate
	// accumulator values for times between when accumulator records are stored.
	P0LastSpotPrice             github_com_cosmos_cosmos_sdk_types.Dec `` /* 150-byte string literal not displayed */
	P1LastSpotPrice             github_com_cosmos_cosmos_sdk_types.Dec `` /* 150-byte string literal not displayed */
	P0ArithmeticTwapAccumulator github_com_cosmos_cosmos_sdk_types.Dec `` /* 186-byte string literal not displayed */
	P1ArithmeticTwapAccumulator github_com_cosmos_cosmos_sdk_types.Dec `` /* 186-byte string literal not displayed */
	// This field contains the time in which the last spot price error occured.
	// It is used to alert the caller if they are getting a potentially erroneous
	// TWAP, due to an unforeseen underlying error.
	LastErrorTime time.Time `protobuf:"bytes,11,opt,name=last_error_time,json=lastErrorTime,proto3,stdtime" json:"last_error_time" yaml:"last_error_time"`
}

A TWAP record should be indexed in state by pool_id, (asset pair), timestamp The asset pair assets should be lexicographically sorted. Technically (pool_id, asset_0_denom, asset_1_denom, height) do not need to appear in the struct however we view this as the wrong performance tradeoff given SDK today. Would rather we optimize for readability and correctness, than an optimal state storage format. The system bottleneck is elsewhere for now.

func GetAllMostRecentTwapsForPool 

func GetAllMostRecentTwapsForPool(store sdk.KVStore, poolId uint64) ([]TwapRecord, error)

GetAllMostRecentTwapsForPool returns all of the most recent twap records for a pool id. if the pool id doesn't exist, then this returns a blank list.

func ParseTwapFromBz 

func ParseTwapFromBz(bz []byte) (twap TwapRecord, err error)

func (*TwapRecord) Descriptor 

func (*TwapRecord) Descriptor() ([]byte, []int)

func (*TwapRecord) GetAsset0Denom 

func (m *TwapRecord) GetAsset0Denom() string

func (*TwapRecord) GetAsset1Denom 

func (m *TwapRecord) GetAsset1Denom() string

func (*TwapRecord) GetHeight 

func (m *TwapRecord) GetHeight() int64

func (*TwapRecord) GetLastErrorTime 

func (m *TwapRecord) GetLastErrorTime() time.Time

func (*TwapRecord) GetPoolId 

func (m *TwapRecord) GetPoolId() uint64

func (*TwapRecord) GetTime 

func (m *TwapRecord) GetTime() time.Time

func (*TwapRecord) Marshal 

func (m *TwapRecord) Marshal() (dAtA []byte, err error)

func (*TwapRecord) MarshalTo 

func (m *TwapRecord) MarshalTo(dAtA []byte) (int, error)

func (*TwapRecord) MarshalToSizedBuffer 

func (m *TwapRecord) MarshalToSizedBuffer(dAtA []byte) (int, error)

func (*TwapRecord) ProtoMessage 

func (*TwapRecord) ProtoMessage()

func (*TwapRecord) Reset 

func (m *TwapRecord) Reset()

func (*TwapRecord) Size 

func (m *TwapRecord) Size() (n int)

func (*TwapRecord) String 

func (m *TwapRecord) String() string

func (*TwapRecord) Unmarshal 

func (m *TwapRecord) Unmarshal(dAtA []byte) error

func (*TwapRecord) XXX_DiscardUnknown 

func (m *TwapRecord) XXX_DiscardUnknown()

func (*TwapRecord) XXX_Marshal 

func (m *TwapRecord) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*TwapRecord) XXX_Merge 

func (m *TwapRecord) XXX_Merge(src proto.Message)

func (*TwapRecord) XXX_Size 

func (m *TwapRecord) XXX_Size() int

func (*TwapRecord) XXX_Unmarshal 

func (m *TwapRecord) XXX_Unmarshal(b []byte) error

type UnexpectedSeparatorError 

type UnexpectedSeparatorError struct {
	ExpectedSeparator string
	ActualSeparator   string
}

func (UnexpectedSeparatorError) Error 

func (e UnexpectedSeparatorError) Error() string

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