coin

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Published: Aug 17, 2022 License: Apache-2.0 Imports: 11 Imported by: 0

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Index

Constants

View Source
const (
	// number of decimal places
	Precision = 18

	// bytes required to represent the above precision
	// Ceiling[Log2[999 999 999 999 999 999]]
	DecimalPrecisionBits = 60
)

Variables

View Source
var (
	ErrEmptyDecimalStr      = errors.New("decimal string cannot be empty")
	ErrInvalidDecimalLength = errors.New("invalid decimal length")
	ErrInvalidDecimalStr    = errors.New("invalid decimal string")
)

Decimal errors

View Source
var MaxSortableDec = OneDec().Quo(SmallestDec())

MaxSortableDec is the largest Dec that can be passed into SortableDecBytes() Its negative form is the least Dec that can be passed in.

Functions

func DecEq

func DecEq(t *testing.T, exp, got Dec) (*testing.T, bool, string, string, string)

intended to be used with require/assert: require.True(DecEq(...))

func DecsEqual

func DecsEqual(d1s, d2s []Dec) bool

test if two decimal arrays are equal

func DefaultCoinDenomRegex

func DefaultCoinDenomRegex() string

DefaultCoinDenomRegex returns the default regex string

func GetBaseDenom

func GetBaseDenom() (string, error)

GetBaseDenom returns the denom of smallest unit registered

func IntEq

func IntEq(t *testing.T, exp, got Int) (*testing.T, bool, string, string, string)

intended to be used with require/assert: require.True(IntEq(...))

func RegisterDenom

func RegisterDenom(denom string, unit Dec) error

RegisterDenom registers a denomination with a corresponding unit. If the denomination is already registered, an error will be returned.

func SetCoinDenomRegex

func SetCoinDenomRegex(reFn func() string)

SetCoinDenomRegex allows for coin's custom validation by overriding the regular expression string used for denom validation.

func SortableDecBytes

func SortableDecBytes(dec Dec) []byte

SortableDecBytes returns a byte slice representation of a Dec that can be sorted. Left and right pads with 0s so there are 18 digits to left and right of the decimal point. For this reason, there is a maximum and minimum value for this, enforced by ValidSortableDec.

func UintOverflow

func UintOverflow(i *big.Int) error

UintOverflow returns true if a given unsigned integer overflows and false otherwise.

func ValidSortableDec

func ValidSortableDec(dec Dec) bool

ValidSortableDec ensures that a Dec is within the sortable bounds, a Dec can't have a precision of less than 10^-18. Max sortable decimal was set to the reciprocal of SmallestDec.

func ValidateDenom

func ValidateDenom(denom string) error

ValidateDenom is the default validation function for Coin.Denom.

Types

type Coin

type Coin struct {
	Denom  string `json:"denom,omitempty"`
	Amount Int    `json:"amount"`
}

----------------------------------------------------------------------------- Coin defines a token with a denomination and an amount.

func ConvertCoin

func ConvertCoin(coin Coin, denom string) (Coin, error)

ConvertCoin attempts to convert a coin to a given denomination. If the given denomination is invalid or if neither denomination is registered, an error is returned.

func MustNewCoin

func MustNewCoin(denom string, amount Int) Coin

MustNewCoin returns a new coin with a denomination and amount. It will panic if the amount is negative or if the denomination is invalid.

func MustNewCoinFromString

func MustNewCoinFromString(denom string, amountStr string) Coin

MustNewCoinFromString returns a new coin from calling NewCoinFromString. It behaves the same except it will panic on any error.

func MustParseCoinNormalized

func MustParseCoinNormalized(coinStr string) Coin

MustParseCoinNormalized parses and normalize a cli input for one coin type. It behaves the same as ParseCoinNormalized except it panics on any error.

func NewCoin

func NewCoin(denom string, amount Int) (Coin, error)

NewCoin returns a new coin with a denomination and amount. It returns error if the amount is negative or if the denomination is invalid.

func NewCoinFromString

func NewCoinFromString(denom string, amountStr string) (Coin, error)

NewCoinFromString returns a new coin with a denomination and string amount. It returns an error if the amount is non-integer, negative or if the denom is invalid.

func NewInt64Coin

func NewInt64Coin(denom string, amount int64) Coin

NewInt64Coin returns a new coin with a denomination and amount. It will panic if the amount is negative.

func NewZeroCoin

func NewZeroCoin(denom string) Coin

NewZeroCoin returns a new coin with zero unit of denomination. It will panic if the denomination is invalid.

func NormalizeCoin

func NormalizeCoin(coin Coin) Coin

NormalizeCoin try to convert a coin to the smallest unit registered, returns original one if failed.

func ParseCoinNormalized

func ParseCoinNormalized(coinStr string) (coin Coin, err error)

ParseCoinNormalized parses and normalize a cli input for one coin type, returning errors if invalid or on an empty string as well. Expected format: "{amount}{denomination}"

func (Coin) Add

func (coin Coin) Add(coinB Coin) Coin

Add adds amounts of two coins with same denom. If the coins differ in denom then it panics.

func (Coin) IsEqual

func (coin Coin) IsEqual(other Coin) bool

IsEqual returns true if the two sets of Coins have the same value

func (Coin) IsGTE

func (coin Coin) IsGTE(other Coin) bool

IsGTE returns true if they are the same type and the receiver is an equal or greater value

func (Coin) IsLT

func (coin Coin) IsLT(other Coin) bool

IsLT returns true if they are the same type and the receiver is a smaller value

func (Coin) IsNegative

func (coin Coin) IsNegative() bool

IsNegative returns true if the coin amount is negative and false otherwise.

TODO: Remove once unsigned integers are used.

func (Coin) IsPositive

func (coin Coin) IsPositive() bool

IsPositive returns true if coin amount is positive.

TODO: Remove once unsigned integers are used.

func (Coin) IsValid

func (coin Coin) IsValid() bool

IsValid returns true if the Coin has a non-negative amount and the denom is valid.

func (Coin) IsZero

func (coin Coin) IsZero() bool

IsZero returns if this represents no money

func (Coin) Neg

func (coin Coin) Neg() Coin

Neg negates the amount and return a new Coin

func (Coin) String

func (coin Coin) String() string

String provides a human-readable representation of a coin

func (Coin) Sub

func (coin Coin) Sub(coinB Coin) Coin

Sub subtracts amounts of two coins with same denom. If the coins differ in denom then it panics.

func (Coin) Validate

func (coin Coin) Validate() error

Validate returns an error if the Coin has a negative amount or if the denom is invalid.

type Coins

type Coins []Coin

Coins is a set of Coin, one per currency

func MustNewCoins

func MustNewCoins(coins ...Coin) Coins

MustNewCoins constructs a new coin set. The provided coins will be sanitized byremoving zero coins and sorting the coin set. A panic will occur if the coin set is not valid.

func MustParseCoinsNormalized

func MustParseCoinsNormalized(coinStr string) Coins

MustParseCoinsNormalized will parse out a list of coins separated by commas behaves the same as ParseCoinsNormalized except it panics on any error.

func NewCoins

func NewCoins(coins ...Coin) (Coins, error)

NewCoins constructs a new coin set. The provided coins will be sanitized by removing zero coins and sorting the coin set. A panic will occur if the coin set is not valid.

func NewEmptyCoins

func NewEmptyCoins() Coins

NewEmptyCoins constructs an empty coin set.

func NormalizeCoins

func NormalizeCoins(coins []DecCoin) Coins

NormalizeCoins normalize and truncate a list of decimal coins

func ParseCoinsNormalized

func ParseCoinsNormalized(coinStr string) (Coins, error)

ParseCoinsNormalized will parse out a list of coins separated by commas, and normalize them by converting to smallest unit. If the parsing is successful, the provided coins will be sanitized by removing zero coins and sorting the coin set. Lastly a validation of the coin set is executed. If the check passes, ParseCoinsNormalized will return the sanitized coins. Otherwise it will return an error. If an empty string is provided to ParseCoinsNormalized, it returns nil Coins. ParseCoinsNormalized supports decimal coins as inputs, and truncate them to int after converted to smallest unit. Expected format: "{amount0}{denomination},...,{amountN}{denominationN}"

func (Coins) Add

func (coins Coins) Add(coinsB ...Coin) Coins

Add adds two sets of coins.

e.g. {2A} + {A, 2B} = {3A, 2B} {2A} + {0B} = {2A}

NOTE: Add operates under the invariant that coins are sorted by denominations.

CONTRACT: Add will never return Coins where one Coin has a non-positive amount. In otherwords, IsValid will always return true.

func (Coins) AmountOf

func (coins Coins) AmountOf(denom string) Int

AmountOf returns the amount of a denom from coins

func (Coins) DenomsSubsetOf

func (coins Coins) DenomsSubsetOf(coinsB Coins) bool

DenomsSubsetOf returns true if receiver's denom set is subset of coinsB's denoms.

func (Coins) Empty

func (coins Coins) Empty() bool

Empty returns true if there are no coins and false otherwise.

func (Coins) GetDenomByIndex

func (coins Coins) GetDenomByIndex(i int) string

GetDenomByIndex returns the Denom of the certain coin to make the findDup generic

func (Coins) IsAllGT

func (coins Coins) IsAllGT(coinsB Coins) bool

IsAllGT returns true if for every denom in coinsB, the denom is present at a greater amount in coins.

func (Coins) IsAllGTE

func (coins Coins) IsAllGTE(coinsB Coins) bool

IsAllGTE returns false if for any denom in coinsB, the denom is present at a smaller amount in coins; else returns true.

func (Coins) IsAllLT

func (coins Coins) IsAllLT(coinsB Coins) bool

IsAllLT returns True iff for every denom in coins, the denom is present at a smaller amount in coinsB.

func (Coins) IsAllLTE

func (coins Coins) IsAllLTE(coinsB Coins) bool

IsAllLTE returns true iff for every denom in coins, the denom is present at a smaller or equal amount in coinsB.

func (Coins) IsAllPositive

func (coins Coins) IsAllPositive() bool

IsAllPositive returns true if there is at least one coin and all currencies have a positive value.

func (Coins) IsAnyGT

func (coins Coins) IsAnyGT(coinsB Coins) bool

IsAnyGT returns true iff for any denom in coins, the denom is present at a greater amount in coinsB.

e.g. {2A, 3B}.IsAnyGT{A} = true {2A, 3B}.IsAnyGT{5C} = false {}.IsAnyGT{5C} = false {2A, 3B}.IsAnyGT{} = false

func (Coins) IsAnyGTE

func (coins Coins) IsAnyGTE(coinsB Coins) bool

IsAnyGTE returns true iff coins contains at least one denom that is present at a greater or equal amount in coinsB; it returns false otherwise.

NOTE: IsAnyGTE operates under the invariant that both coin sets are sorted by denominations and there exists no zero coins.

func (Coins) IsAnyNegative

func (coins Coins) IsAnyNegative() bool

IsAnyNegative returns true if there is at least one coin whose amount is negative; returns false otherwise. It returns false if the coin set is empty too.

TODO: Remove once unsigned integers are used.

func (Coins) IsEqual

func (coins Coins) IsEqual(coinsB Coins) bool

IsEqual returns true if the two sets of Coins have the same value

func (Coins) IsValid

func (coins Coins) IsValid() bool

IsValid calls Validate and returns true when the Coins are sorted, have positive amount, with a valid and unique denomination (i.e no duplicates).

func (Coins) IsZero

func (coins Coins) IsZero() bool

IsZero returns true if there are no coins or all coins are zero.

func (Coins) Len

func (coins Coins) Len() int

Len implements sort.Interface for Coins

func (Coins) Less

func (coins Coins) Less(i, j int) bool

Less implements sort.Interface for Coins

func (Coins) MarshalJSON

func (coins Coins) MarshalJSON() ([]byte, error)

MarshalJSON implements a custom JSON marshaller for the Coins type to allow nil Coins to be encoded as an empty array.

func (Coins) SafeSub

func (coins Coins) SafeSub(coinsB Coins) (Coins, bool)

SafeSub performs the same arithmetic as Sub but returns a boolean if any negative coin amount was returned.

func (Coins) Sort

func (coins Coins) Sort() Coins

Sort is a helper function to sort the set of coins in-place

func (Coins) String

func (coins Coins) String() string

func (Coins) Sub

func (coins Coins) Sub(coinsB Coins) Coins

Sub subtracts a set of coins from another.

e.g. {2A, 3B} - {A} = {A, 3B} {2A} - {0B} = {2A} {A, B} - {A} = {B}

CONTRACT: Sub will never return Coins where one Coin has a non-positive amount. In otherwords, IsValid will always return true.

func (Coins) Swap

func (coins Coins) Swap(i, j int)

Swap implements sort.Interface for Coins

func (*Coins) UnmarshalJSON

func (coins *Coins) UnmarshalJSON(data []byte) error

UnmarshalJSON implements a custom JSON unmarshaller for the Coins type to allow empty array to be decoded as nil Coins. Added to match the behaviour of Cosmos marshaller

func (Coins) Validate

func (coins Coins) Validate() error

Validate checks that the Coins are sorted, have positive amount, with a valid and unique denomination (i.e no duplicates). Otherwise, it returns an error.

type Dec

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

NOTE: never use new(Dec) or else we will panic unmarshalling into the nil embedded big.Int

func GetDenomUnit

func GetDenomUnit(denom string) (Dec, bool)

GetDenomUnit returns a unit for a given denomination if it exists. A boolean is returned if the denomination is registered.

func MaxDec

func MaxDec(d1, d2 Dec) Dec

maximum decimal between two

func MinDec

func MinDec(d1, d2 Dec) Dec

minimum decimal between two

func MustNewDecFromStr

func MustNewDecFromStr(s string) Dec

Decimal from string, panic on error

func NewDec

func NewDec(i int64) Dec

create a new Dec from integer assuming whole number

func NewDecFromBigInt

func NewDecFromBigInt(i *big.Int) Dec

create a new Dec from big integer assuming whole numbers CONTRACT: prec <= Precision

func NewDecFromBigIntWithPrec

func NewDecFromBigIntWithPrec(i *big.Int, prec int64) Dec

create a new Dec from big integer assuming whole numbers CONTRACT: prec <= Precision

func NewDecFromInt

func NewDecFromInt(i Int) Dec

create a new Dec from big integer assuming whole numbers CONTRACT: prec <= Precision

func NewDecFromIntWithPrec

func NewDecFromIntWithPrec(i Int, prec int64) Dec

create a new Dec from big integer with decimal place at prec CONTRACT: prec <= Precision

func NewDecFromStr

func NewDecFromStr(str string) (Dec, error)

create a decimal from an input decimal string. valid must come in the form:

(-) whole integers (.) decimal integers

examples of acceptable input include:

-123.456
456.7890
345
-456789

NOTE - An error will return if more decimal places are provided in the string than the constant Precision.

CONTRACT - This function does not mutate the input str.

func NewDecWithPrec

func NewDecWithPrec(i, prec int64) Dec

create a new Dec from integer with decimal place at prec CONTRACT: prec <= Precision

func OneDec

func OneDec() Dec

func SmallestDec

func SmallestDec() Dec

func ZeroDec

func ZeroDec() Dec

func (Dec) Abs

func (d Dec) Abs() Dec

func (Dec) Add

func (d Dec) Add(d2 Dec) Dec

addition

func (Dec) ApproxRoot

func (d Dec) ApproxRoot(root uint64) (guess Dec, err error)

ApproxRoot returns an approximate estimation of a Dec's positive real nth root using Newton's method (where n is positive). The algorithm starts with some guess and computes the sequence of improved guesses until an answer converges to an approximate answer. It returns `|d|.ApproxRoot() * -1` if input is negative. A maximum number of 100 iterations is used a backup boundary condition for cases where the answer never converges enough to satisfy the main condition.

func (Dec) ApproxSqrt

func (d Dec) ApproxSqrt() (Dec, error)

ApproxSqrt is a wrapper around ApproxRoot for the common special case of finding the square root of a number. It returns -(sqrt(abs(d)) if input is negative.

func (Dec) BigInt

func (d Dec) BigInt() *big.Int

BigInt returns a copy of the underlying big.Int.

func (Dec) Ceil

func (d Dec) Ceil() Dec

Ceil returns the smallest interger value (as a decimal) that is greater than or equal to the given decimal.

func (Dec) Equal

func (d Dec) Equal(d2 Dec) bool

func (Dec) Format

func (d Dec) Format(s fmt.State, verb rune)

format decimal state

func (Dec) GT

func (d Dec) GT(d2 Dec) bool

func (Dec) GTE

func (d Dec) GTE(d2 Dec) bool

func (Dec) IsInteger

func (d Dec) IsInteger() bool

is integer, e.g. decimals are zero

func (Dec) IsNegative

func (d Dec) IsNegative() bool

func (Dec) IsNil

func (d Dec) IsNil() bool

______________________________________________________________________________________________ nolint

func (Dec) IsPositive

func (d Dec) IsPositive() bool

func (Dec) IsZero

func (d Dec) IsZero() bool

func (Dec) LT

func (d Dec) LT(d2 Dec) bool

func (Dec) LTE

func (d Dec) LTE(d2 Dec) bool

func (Dec) MarshalJSON

func (d Dec) MarshalJSON() ([]byte, error)

MarshalJSON marshals the decimal

func (Dec) MarshalYAML

func (d Dec) MarshalYAML() (interface{}, error)

MarshalYAML returns the YAML representation.

func (Dec) Mul

func (d Dec) Mul(d2 Dec) Dec

multiplication

func (Dec) MulInt

func (d Dec) MulInt(i Int) Dec

multiplication

func (Dec) MulInt64

func (d Dec) MulInt64(i int64) Dec

MulInt64 - multiplication with int64

func (Dec) MulTruncate

func (d Dec) MulTruncate(d2 Dec) Dec

multiplication truncate

func (Dec) Neg

func (d Dec) Neg() Dec

func (Dec) Power

func (d Dec) Power(power uint64) Dec

Power returns a the result of raising to a positive integer power

func (Dec) Quo

func (d Dec) Quo(d2 Dec) Dec

quotient

func (Dec) QuoInt

func (d Dec) QuoInt(i Int) Dec

quotient

func (Dec) QuoInt64

func (d Dec) QuoInt64(i int64) Dec

QuoInt64 - quotient with int64

func (Dec) QuoRoundUp

func (d Dec) QuoRoundUp(d2 Dec) Dec

quotient, round up

func (Dec) QuoTruncate

func (d Dec) QuoTruncate(d2 Dec) Dec

quotient truncate

func (Dec) RoundInt

func (d Dec) RoundInt() Int

RoundInt round the decimal using bankers rounding

func (Dec) RoundInt64

func (d Dec) RoundInt64() int64

RoundInt64 rounds the decimal using bankers rounding

func (Dec) String

func (d Dec) String() string

func (Dec) Sub

func (d Dec) Sub(d2 Dec) Dec

subtraction

func (Dec) TruncateDec

func (d Dec) TruncateDec() Dec

TruncateDec truncates the decimals from the number and returns a Dec

func (Dec) TruncateInt

func (d Dec) TruncateInt() Int

TruncateInt truncates the decimals from the number and returns an Int

func (Dec) TruncateInt64

func (d Dec) TruncateInt64() int64

TruncateInt64 truncates the decimals from the number and returns an int64

func (*Dec) UnmarshalJSON

func (d *Dec) UnmarshalJSON(bz []byte) error

UnmarshalJSON defines custom decoding scheme

type DecCoin

type DecCoin struct {
	Denom  string `json:"denom,omitempty"`
	Amount Dec    `json:"amount"`
}

---------------------------------------------------------------------------- Decimal Coin DecCoin defines a token with a denomination and a decimal amount.

func ConvertDecCoin

func ConvertDecCoin(coin DecCoin, denom string) (DecCoin, error)

ConvertDecCoin attempts to convert a decimal coin to a given denomination. If the given denomination is invalid or if neither denomination is registered, an error is returned.

func MustParseDecCoin

func MustParseDecCoin(coinStr string) DecCoin

MustParseDecCoins parses a decimal coin from a string. It behaves the same as ParseDecCoin, except it panics on any error.

func NewDecCoin

func NewDecCoin(denom string, amount Int) DecCoin

NewDecCoin creates a new DecCoin instance from an Int.

func NewDecCoinFromCoin

func NewDecCoinFromCoin(coin Coin) DecCoin

NewDecCoinFromCoin creates a new DecCoin from a Coin.

func NewDecCoinFromDec

func NewDecCoinFromDec(denom string, amount Dec) DecCoin

NewDecCoinFromDec creates a new DecCoin instance from a Dec.

func NewDecCoinFromString

func NewDecCoinFromString(denom string, amountStr string) (DecCoin, error)

NewDecCoinFromString creates a new DecCoin instance from a string.

func NewInt64DecCoin

func NewInt64DecCoin(denom string, amount int64) DecCoin

NewInt64DecCoin returns a new DecCoin with a denomination and amount. It will panic if the amount is negative or denom is invalid.

func NormalizeDecCoin

func NormalizeDecCoin(coin DecCoin) DecCoin

NormalizeDecCoin try to convert a decimal coin to the smallest unit registered, returns original one if failed.

func ParseDecCoin

func ParseDecCoin(coinStr string) (coin DecCoin, err error)

ParseDecCoin parses a decimal coin from a string, returning an error if invalid. An empty string is considered invalid.

func (DecCoin) Add

func (coin DecCoin) Add(coinB DecCoin) DecCoin

Add adds amounts of two decimal coins with same denom.

func (DecCoin) IsEqual

func (coin DecCoin) IsEqual(other DecCoin) bool

IsEqual returns true if the two sets of Coins have the same value.

func (DecCoin) IsGTE

func (coin DecCoin) IsGTE(other DecCoin) bool

IsGTE returns true if they are the same type and the receiver is an equal or greater value.

func (DecCoin) IsLT

func (coin DecCoin) IsLT(other DecCoin) bool

IsLT returns true if they are the same type and the receiver is a smaller value.

func (DecCoin) IsNegative

func (coin DecCoin) IsNegative() bool

IsNegative returns true if the coin amount is negative and false otherwise.

TODO: Remove once unsigned integers are used.

func (DecCoin) IsPositive

func (coin DecCoin) IsPositive() bool

IsPositive returns true if coin amount is positive.

TODO: Remove once unsigned integers are used.

func (DecCoin) IsValid

func (coin DecCoin) IsValid() bool

IsValid returns true if the DecCoin has a non-negative amount and the denom is valid.

func (DecCoin) IsZero

func (coin DecCoin) IsZero() bool

IsZero returns if the DecCoin amount is zero.

func (DecCoin) String

func (coin DecCoin) String() string

String implements the Stringer interface for DecCoin. It returns a human-readable representation of a decimal coin.

func (DecCoin) Sub

func (coin DecCoin) Sub(coinB DecCoin) DecCoin

Sub subtracts amounts of two decimal coins with same denom.

func (DecCoin) TruncateDecimal

func (coin DecCoin) TruncateDecimal() (Coin, DecCoin)

TruncateDecimal returns a Coin with a truncated decimal and a DecCoin for the change. Note, the change may be zero.

func (DecCoin) Validate

func (coin DecCoin) Validate() error

Validate returns an error if the DecCoin has a negative amount or if the denom is invalid.

type DecCoins

type DecCoins []DecCoin

DecCoins defines a slice of coins with decimal values

func MustParseDecCoins

func MustParseDecCoins(coinsStr string) DecCoins

MustParseDecCoins will parse out a list of decimal coins separated by commas. It behaves the same as ParseDecCoins, except it panics on any error.

func NewDecCoins

func NewDecCoins(decCoins ...DecCoin) DecCoins

NewDecCoins constructs a new coin set with with decimal values from DecCoins. The provided coins will be sanitized by removing zero coins and sorting the coin set. A panic will occur if the coin set is not valid.

func NewDecCoinsFromCoins

func NewDecCoinsFromCoins(coins ...Coin) DecCoins

NewDecCoinsFromCoins constructs a new coin set with decimal values from regular Coins.

func NewEmptyDecCoins

func NewEmptyDecCoins() DecCoins

NewEmptyDecCoins constructs an empty decimal coin set.

func ParseDecCoins

func ParseDecCoins(coinsStr string) (DecCoins, error)

ParseDecCoins will parse out a list of decimal coins separated by commas. If the parsing is successful, the provided coins will be sanitized by removing zero coins and sorting the coin set. Lastly a validation of the coin set is executed. If the check passes, ParseDecCoins will return the sanitized coins. Otherwise it will return an error. If an empty string is provided to ParseDecCoins, it returns nil Coins. Expected format: "{amount0}{denomination},...,{amountN}{denominationN}"

func (DecCoins) Add

func (coins DecCoins) Add(coinsB ...DecCoin) DecCoins

Add adds two sets of DecCoins.

NOTE: Add operates under the invariant that coins are sorted by denominations.

CONTRACT: Add will never return Coins where one Coin has a non-positive amount. In otherwords, IsValid will always return true.

func (DecCoins) AmountOf

func (coins DecCoins) AmountOf(denom string) Dec

AmountOf returns the amount of a denom from deccoins

func (DecCoins) Empty

func (coins DecCoins) Empty() bool

Empty returns true if there are no coins and false otherwise.

func (DecCoins) GetDenomByIndex

func (coins DecCoins) GetDenomByIndex(i int) string

GetDenomByIndex returns the Denom to make the findDup generic

func (DecCoins) Intersect

func (coins DecCoins) Intersect(coinsB DecCoins) DecCoins

Intersect will return a new set of coins which contains the minimum DecCoin for common denoms found in both `coins` and `coinsB`. For denoms not common to both `coins` and `coinsB` the minimum is considered to be 0, thus they are not added to the final set.In other words, trim any denom amount from coin which exceeds that of coinB, such that (coin.Intersect(coinB)).IsLTE(coinB).

func (DecCoins) IsAllPositive

func (coins DecCoins) IsAllPositive() bool

IsAllPositive returns true if there is at least one coin and all currencies have a positive value.

TODO: Remove once unsigned integers are used.

func (DecCoins) IsAnyNegative

func (coins DecCoins) IsAnyNegative() bool

IsAnyNegative returns true if there is at least one coin whose amount is negative; returns false otherwise. It returns false if the DecCoins set is empty too.

TODO: Remove once unsigned integers are used.

func (DecCoins) IsEqual

func (coins DecCoins) IsEqual(coinsB DecCoins) bool

IsEqual returns true if the two sets of DecCoins have the same value.

func (DecCoins) IsValid

func (coins DecCoins) IsValid() bool

IsValid calls Validate and returns true when the DecCoins are sorted, have positive amount, with a valid and unique denomination (i.e no duplicates).

func (DecCoins) IsZero

func (coins DecCoins) IsZero() bool

IsZero returns whether all coins are zero

func (DecCoins) Len

func (coins DecCoins) Len() int

Len implements sort.Interface for DecCoins

func (DecCoins) Less

func (coins DecCoins) Less(i, j int) bool

Less implements sort.Interface for DecCoins

func (DecCoins) MulDec

func (coins DecCoins) MulDec(d Dec) DecCoins

MulDec multiplies all the coins by a decimal.

CONTRACT: No zero coins will be returned.

func (DecCoins) MulDecTruncate

func (coins DecCoins) MulDecTruncate(d Dec) DecCoins

MulDecTruncate multiplies all the decimal coins by a decimal, truncating. It panics if d is zero.

CONTRACT: No zero coins will be returned.

func (DecCoins) QuoDec

func (coins DecCoins) QuoDec(d Dec) DecCoins

QuoDec divides all the decimal coins by a decimal. It panics if d is zero.

CONTRACT: No zero coins will be returned.

func (DecCoins) QuoDecTruncate

func (coins DecCoins) QuoDecTruncate(d Dec) DecCoins

QuoDecTruncate divides all the decimal coins by a decimal, truncating. It panics if d is zero.

CONTRACT: No zero coins will be returned.

func (DecCoins) SafeSub

func (coins DecCoins) SafeSub(coinsB DecCoins) (DecCoins, bool)

SafeSub performs the same arithmetic as Sub but returns a boolean if any negative coin amount was returned.

func (DecCoins) Sort

func (coins DecCoins) Sort() DecCoins

Sort is a helper function to sort the set of decimal coins in-place.

func (DecCoins) String

func (coins DecCoins) String() string

String implements the Stringer interface for DecCoins. It returns a human-readable representation of decimal coins.

func (DecCoins) Sub

func (coins DecCoins) Sub(coinsB DecCoins) DecCoins

Sub subtracts a set of DecCoins from another (adds the inverse).

func (DecCoins) Swap

func (coins DecCoins) Swap(i, j int)

Swap implements sort.Interface for DecCoins

func (DecCoins) TruncateDecimal

func (coins DecCoins) TruncateDecimal() (truncatedCoins Coins, changeCoins DecCoins)

TruncateDecimal returns the coins with truncated decimals and returns the change. Note, it will not return any zero-amount coins in either the truncated or change coins.

func (DecCoins) Validate

func (coins DecCoins) Validate() error

Validate checks that the DecCoins are sorted, have positive amount, with a valid and unique denomination (i.e no duplicates). Otherwise, it returns an error.

type Int

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

Int wraps integer with 256 bit range bound Checks overflow, underflow and division by zero Exists in range from -(2^maxBitLen-1) to 2^maxBitLen-1

func MaxInt

func MaxInt(i, i2 Int) Int

MaxInt returns the maximum between two integers.

func MinInt

func MinInt(i1, i2 Int) Int

return the minimum of the ints

func NewInt

func NewInt(n int64) Int

NewInt constructs Int from int64

func NewIntFromBigInt

func NewIntFromBigInt(i *big.Int) Int

NewIntFromBigInt constructs Int from big.Int

func NewIntFromString

func NewIntFromString(s string) (res Int, ok bool)

NewIntFromString constructs Int from string

func NewIntFromUint64

func NewIntFromUint64(n uint64) Int

NewIntFromUint64 constructs an Int from a uint64.

func NewIntWithDecimal

func NewIntWithDecimal(n int64, dec int) Int

NewIntWithDecimal constructs Int with decimal Result value is n*10^dec

func OneInt

func OneInt() Int

OneInt returns Int value with one

func ZeroInt

func ZeroInt() Int

ZeroInt returns Int value with zero

func (Int) Add

func (i Int) Add(i2 Int) (res Int)

Add adds Int from another

func (Int) AddRaw

func (i Int) AddRaw(i2 int64) Int

AddRaw adds int64 to Int

func (Int) BigInt

func (i Int) BigInt() *big.Int

BigInt converts Int to big.Int

func (Int) Equal

func (i Int) Equal(i2 Int) bool

Equal compares two Ints

func (Int) GT

func (i Int) GT(i2 Int) bool

GT returns true if first Int is greater than second

func (Int) GTE

func (i Int) GTE(i2 Int) bool

GTE returns true if receiver Int is greater than or equal to the parameter Int.

func (Int) Int64

func (i Int) Int64() int64

Int64 converts Int to int64 Panics if the value is out of range

func (Int) IsInt64

func (i Int) IsInt64() bool

IsInt64 returns true if Int64() not panics

func (Int) IsNegative

func (i Int) IsNegative() bool

IsNegative returns true if Int is negative

func (Int) IsNil

func (i Int) IsNil() bool

IsNil returns true if Int is uninitialized

func (Int) IsPositive

func (i Int) IsPositive() bool

IsPositive returns true if Int is positive

func (Int) IsUint64

func (i Int) IsUint64() bool

IsUint64 returns true if Uint64() not panics

func (Int) IsZero

func (i Int) IsZero() bool

IsZero returns true if Int is zero

func (Int) LT

func (i Int) LT(i2 Int) bool

LT returns true if first Int is lesser than second

func (Int) LTE

func (i Int) LTE(i2 Int) bool

LTE returns true if first Int is less than or equal to second

func (Int) MarshalJSON

func (i Int) MarshalJSON() ([]byte, error)

MarshalJSON defines custom encoding scheme

func (Int) MarshalYAML

func (i Int) MarshalYAML() (interface{}, error)

MarshalYAML returns the YAML representation.

func (Int) Mod

func (i Int) Mod(i2 Int) Int

Mod returns remainder after dividing with Int

func (Int) ModRaw

func (i Int) ModRaw(i2 int64) Int

ModRaw returns remainder after dividing with int64

func (Int) Mul

func (i Int) Mul(i2 Int) (res Int)

Mul multiples two Ints

func (Int) MulRaw

func (i Int) MulRaw(i2 int64) Int

MulRaw multipies Int and int64

func (Int) Neg

func (i Int) Neg() (res Int)

Neg negates Int

func (Int) Quo

func (i Int) Quo(i2 Int) (res Int)

Quo divides Int with Int

func (Int) QuoRaw

func (i Int) QuoRaw(i2 int64) Int

QuoRaw divides Int with int64

func (Int) Sign

func (i Int) Sign() int

Sign returns sign of Int

func (Int) String

func (i Int) String() string

Human readable string

func (Int) Sub

func (i Int) Sub(i2 Int) (res Int)

Sub subtracts Int from another

func (Int) SubRaw

func (i Int) SubRaw(i2 int64) Int

SubRaw subtracts int64 from Int

func (Int) ToDec

func (i Int) ToDec() Dec

ToDec converts Int to Dec

func (Int) Uint64

func (i Int) Uint64() uint64

Uint64 converts Int to uint64 Panics if the value is out of range

func (*Int) UnmarshalJSON

func (i *Int) UnmarshalJSON(bz []byte) error

UnmarshalJSON defines custom decoding scheme

type Uint

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

Uint wraps integer with 256 bit range bound Checks overflow, underflow and division by zero Exists in range from 0 to 2^256-1

func MaxUint

func MaxUint(u1, u2 Uint) Uint

Return the maximum of the Uints

func MinUint

func MinUint(u1, u2 Uint) Uint

Return the minimum of the Uints

func NewUint

func NewUint(n uint64) Uint

NewUint constructs Uint from int64

func NewUintFromBigInt

func NewUintFromBigInt(i *big.Int) Uint

NewUintFromBigUint constructs Uint from big.Uint

func NewUintFromString

func NewUintFromString(s string) Uint

NewUintFromString constructs Uint from string

func OneUint

func OneUint() Uint

OneUint returns Uint value with one.

func ParseUint

func ParseUint(s string) (Uint, error)

ParseUint reads a string-encoded Uint value and return a Uint.

func RelativePow

func RelativePow(x Uint, n Uint, b Uint) (z Uint)

RelativePow raises x to the power of n, where x (and the result, z) are scaled by factor b for example, RelativePow(210, 2, 100) = 441 (2.1^2 = 4.41)

func ZeroUint

func ZeroUint() Uint

ZeroUint returns unsigned zero.

func (Uint) Add

func (u Uint) Add(u2 Uint) Uint

Add adds Uint from another

func (Uint) AddUint64

func (u Uint) AddUint64(u2 uint64) Uint

Add convert uint64 and add it to Uint

func (Uint) BigInt

func (u Uint) BigInt() *big.Int

BigInt converts Uint to big.Int

func (Uint) Decr

func (u Uint) Decr() Uint

Decr decrements the Uint by one. Decr will panic if the Uint is zero.

func (Uint) Equal

func (u Uint) Equal(u2 Uint) bool

Equal compares two Uints

func (Uint) GT

func (u Uint) GT(u2 Uint) bool

GT returns true if first Uint is greater than second

func (Uint) GTE

func (u Uint) GTE(u2 Uint) bool

GTE returns true if first Uint is greater than second

func (Uint) Incr

func (u Uint) Incr() Uint

Incr increments the Uint by one.

func (Uint) IsZero

func (u Uint) IsZero() bool

IsZero returns 1 if the uint equals to 0.

func (Uint) LT

func (u Uint) LT(u2 Uint) bool

LT returns true if first Uint is lesser than second

func (Uint) LTE

func (u Uint) LTE(u2 Uint) bool

LTE returns true if first Uint is lesser than or equal to the second

func (Uint) MarshalJSON

func (u Uint) MarshalJSON() ([]byte, error)

MarshalJSON defines custom encoding scheme

func (Uint) Mod

func (u Uint) Mod(u2 Uint) Uint

Mod returns remainder after dividing with Uint

func (Uint) Mul

func (u Uint) Mul(u2 Uint) (res Uint)

Mul multiplies two Uints

func (Uint) MulUint64

func (u Uint) MulUint64(u2 uint64) (res Uint)

Mul multiplies two Uints

func (Uint) Quo

func (u Uint) Quo(u2 Uint) (res Uint)

Quo divides Uint with Uint

func (Uint) QuoUint64

func (u Uint) QuoUint64(u2 uint64) Uint

Quo divides Uint with uint64

func (Uint) String

func (u Uint) String() string

Human readable string

func (Uint) Sub

func (u Uint) Sub(u2 Uint) Uint

Sub adds Uint from another

func (Uint) SubUint64

func (u Uint) SubUint64(u2 uint64) Uint

SubUint64 adds Uint from another

func (Uint) Uint64

func (u Uint) Uint64() uint64

Uint64 converts Uint to uint64 Panics if the value is out of range

func (*Uint) UnmarshalJSON

func (u *Uint) UnmarshalJSON(bz []byte) error

UnmarshalJSON defines custom decoding scheme

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