amount

Documentation

Index

• Constants
• Variables
• type Amount
  • func NewAmountFromBytes(bs []byte) *Amount
  • func NewCoinAmount(i uint64, f uint64) *Amount
  • func ParseAmount(str string) (*Amount, error)
  • func (am *Amount) Add(b *Amount) *Amount
  • func (am *Amount) Clone() *Amount
  • func (am *Amount) Div(b *Amount) *Amount
  • func (am *Amount) DivC(b int64) *Amount
  • func (am *Amount) Equal(b *Amount) bool
  • func (am *Amount) IsZero() bool
  • func (am *Amount) Less(b *Amount) bool
  • func (am *Amount) MarshalJSON() ([]byte, error)
  • func (am *Amount) Mul(b *Amount) *Amount
  • func (am *Amount) MulC(b int64) *Amount
  • func (am *Amount) ReadFrom(r io.Reader) (int64, error)
  • func (am *Amount) String() string
  • func (am *Amount) Sub(b *Amount) *Amount
  • func (am *Amount) UnmarshalJSON(bs []byte) error
  • func (am *Amount) WriteTo(w io.Writer) (int64, error)

Constants

const FractionalCount = 18

FractionalCount represent the number of under the float point

const FractionalMax = 1000000000000000000

FractionalMax represent the max value of under the float point

Variables

var COIN = NewCoinAmount(1, 0)

COIN is 1 coin

var (
	ErrInvalidAmountFormat = errors.New("invalid amount format")
)

amount errors

Types

type Amount

type Amount struct {
	*big.Int
}

Amount is the precision float value based on the big.Int

func NewAmountFromBytes

func NewAmountFromBytes(bs []byte) *Amount

NewAmountFromBytes parse the amount from the byte array

func NewCoinAmount

func NewCoinAmount(i uint64, f uint64) *Amount

NewCoinAmount returns the amount that is consisted of the integer and the fractional value

func ParseAmount

func ParseAmount(str string) (*Amount, error)

ParseAmount parse the amount from the float string

func (*Amount) Add

func (am *Amount) Add(b *Amount) *Amount

Add returns a + b (*immutable)

func (*Amount) Clone

func (am *Amount) Clone() *Amount

Clone returns the clonend value of it

func (*Amount) Div

func (am *Amount) Div(b *Amount) *Amount

Div returns a / b (*immutable)

func (*Amount) DivC

func (am *Amount) DivC(b int64) *Amount

DivC returns a / b (*immutable)

func (*Amount) Equal

func (am *Amount) Equal(b *Amount) bool

Equal checks that two values is same or not

func (*Amount) IsZero

func (am *Amount) IsZero() bool

IsZero returns a == 0

func (*Amount) Less

func (am *Amount) Less(b *Amount) bool

Less returns a < b

func (*Amount) MarshalJSON

func (am *Amount) MarshalJSON() ([]byte, error)

MarshalJSON is a marshaler function

func (*Amount) Mul

func (am *Amount) Mul(b *Amount) *Amount

Mul returns a * b (*immutable)

func (*Amount) MulC

func (am *Amount) MulC(b int64) *Amount

MulC returns a * b (*immutable)

func (*Amount) ReadFrom

func (am *Amount) ReadFrom(r io.Reader) (int64, error)

ReadFrom is a deserialization function

func (*Amount) String

func (am *Amount) String() string

String returns the float string of the amount

func (*Amount) Sub

func (am *Amount) Sub(b *Amount) *Amount

Sub returns a - b (*immutable)

func (*Amount) UnmarshalJSON

func (am *Amount) UnmarshalJSON(bs []byte) error

UnmarshalJSON is a unmarshaler function

func (*Amount) WriteTo

func (am *Amount) WriteTo(w io.Writer) (int64, error)

WriteTo is a serialization function