neoneo-go/pkg/util/fixed8.go

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package util
import (
"encoding/json"
"errors"
"strconv"
"strings"
)
const (
precision = 8
decimals = 100000000
)
var errInvalidString = errors.New("Fixed8 must satisfy following regex \\d+(\\.\\d{1,8})?")
// Fixed8 represents a fixed-point number with precision 10^-8.
type Fixed8 int64
// String implements the Stringer interface.
func (f Fixed8) String() string {
buf := new(strings.Builder)
val := int64(f)
if val < 0 {
buf.WriteRune('-')
val = -val
}
str := strconv.FormatInt(val/decimals, 10)
buf.WriteString(str)
val %= decimals
if val > 0 {
buf.WriteRune('.')
str = strconv.FormatInt(val, 10)
for i := len(str); i < 8; i++ {
buf.WriteRune('0')
}
buf.WriteString(str)
}
return buf.String()
}
// Value returns the original value representing the Fixed8.
func (f Fixed8) Value() int64 {
Implemented rpc server method GetRawTransaction (#135) * Added utility function GetVarSize * 1) Added Size method: this implied that Fixed8 implements now the serializable interface. 2) Added few arithmetic operation (Add, Sub, div): this will be used to calculated networkfeeand feePerByte. Changed return value of the Value() method to int instead of int64. Modified fixed8_test accordingly. * Implemented Size or MarshalJSON method. - Structs accepting the Size method implement the serializable interface. - Structs accepting the MarshalJSON method implements the customized json marshaller interface. * Added fee calculation * Implemented rcp server method GetRawTransaction * Updated Tests * Fixed: 1) NewFixed8 will accept as input int64 2) race condition affecting configDeafault, blockchainDefault * Simplified Size calculation * 1) Removed global variable blockchainDefault, configDefault 2) Extended Blockchainer interface to include the methods: References, FeePerByte, SystemFee, NetworkFee 3) Deleted fee_test.go, fee.go. Moved corresponding methods to blockchain_test.go and blockchain.go respectively 4) Amended tx_raw_output.go * Simplified GetVarSize Method * Replaced ValueAtAndType with ValueWithType * Cosmetic changes + Added test case getrawtransaction_7 * Clean up Print statement * Filled up keys * Aligned verbose logic with the C#-neo implementation * Implemented @Kim requests Refactor server_test.go * Small fixes * Fixed verbose logic Added more tests Cosmetic changes * Replaced assert.NoError with require.NoError * Fixed tests by adding context.Background() as argument * Fixed tests
2019-02-20 17:39:32 +00:00
return int64(f) / decimals
}
Implemented rpc server method GetRawTransaction (#135) * Added utility function GetVarSize * 1) Added Size method: this implied that Fixed8 implements now the serializable interface. 2) Added few arithmetic operation (Add, Sub, div): this will be used to calculated networkfeeand feePerByte. Changed return value of the Value() method to int instead of int64. Modified fixed8_test accordingly. * Implemented Size or MarshalJSON method. - Structs accepting the Size method implement the serializable interface. - Structs accepting the MarshalJSON method implements the customized json marshaller interface. * Added fee calculation * Implemented rcp server method GetRawTransaction * Updated Tests * Fixed: 1) NewFixed8 will accept as input int64 2) race condition affecting configDeafault, blockchainDefault * Simplified Size calculation * 1) Removed global variable blockchainDefault, configDefault 2) Extended Blockchainer interface to include the methods: References, FeePerByte, SystemFee, NetworkFee 3) Deleted fee_test.go, fee.go. Moved corresponding methods to blockchain_test.go and blockchain.go respectively 4) Amended tx_raw_output.go * Simplified GetVarSize Method * Replaced ValueAtAndType with ValueWithType * Cosmetic changes + Added test case getrawtransaction_7 * Clean up Print statement * Filled up keys * Aligned verbose logic with the C#-neo implementation * Implemented @Kim requests Refactor server_test.go * Small fixes * Fixed verbose logic Added more tests Cosmetic changes * Replaced assert.NoError with require.NoError * Fixed tests by adding context.Background() as argument * Fixed tests
2019-02-20 17:39:32 +00:00
// NewFixed8 returns a new Fixed8 type multiplied by decimals.
func NewFixed8(val int64) Fixed8 {
return Fixed8(decimals * val)
}
Implemented rpc server method GetRawTransaction (#135) * Added utility function GetVarSize * 1) Added Size method: this implied that Fixed8 implements now the serializable interface. 2) Added few arithmetic operation (Add, Sub, div): this will be used to calculated networkfeeand feePerByte. Changed return value of the Value() method to int instead of int64. Modified fixed8_test accordingly. * Implemented Size or MarshalJSON method. - Structs accepting the Size method implement the serializable interface. - Structs accepting the MarshalJSON method implements the customized json marshaller interface. * Added fee calculation * Implemented rcp server method GetRawTransaction * Updated Tests * Fixed: 1) NewFixed8 will accept as input int64 2) race condition affecting configDeafault, blockchainDefault * Simplified Size calculation * 1) Removed global variable blockchainDefault, configDefault 2) Extended Blockchainer interface to include the methods: References, FeePerByte, SystemFee, NetworkFee 3) Deleted fee_test.go, fee.go. Moved corresponding methods to blockchain_test.go and blockchain.go respectively 4) Amended tx_raw_output.go * Simplified GetVarSize Method * Replaced ValueAtAndType with ValueWithType * Cosmetic changes + Added test case getrawtransaction_7 * Clean up Print statement * Filled up keys * Aligned verbose logic with the C#-neo implementation * Implemented @Kim requests Refactor server_test.go * Small fixes * Fixed verbose logic Added more tests Cosmetic changes * Replaced assert.NoError with require.NoError * Fixed tests by adding context.Background() as argument * Fixed tests
2019-02-20 17:39:32 +00:00
// NewFixed8FromFloat returns a new Fixed8 type multiplied by decimals.
func NewFixed8FromFloat(val float64) Fixed8 {
return Fixed8(int64(decimals * val))
}
// Fixed8DecodeString parses s which must be a fixed point number
// with precision up to 10^-8
func Fixed8DecodeString(s string) (Fixed8, error) {
parts := strings.SplitN(s, ".", 2)
ip, err := strconv.ParseInt(parts[0], 10, 64)
if err != nil {
return 0, errInvalidString
} else if len(parts) == 1 {
return Fixed8(ip * decimals), nil
}
fp, err := strconv.ParseInt(parts[1], 10, 64)
if err != nil || fp >= decimals {
return 0, errInvalidString
}
for i := len(parts[1]); i < precision; i++ {
fp *= 10
}
if ip < 0 {
return Fixed8(ip*decimals - fp), nil
}
return Fixed8(ip*decimals + fp), nil
}
// UnmarshalJSON implements the json unmarshaller interface.
func (f *Fixed8) UnmarshalJSON(data []byte) error {
var s string
if err := json.Unmarshal(data, &s); err == nil {
p, err := Fixed8DecodeString(s)
if err != nil {
return err
}
*f = p
return nil
}
var fl float64
if err := json.Unmarshal(data, &fl); err != nil {
return err
}
*f = Fixed8(decimals * fl)
return nil
}
Implemented rpc server method GetRawTransaction (#135) * Added utility function GetVarSize * 1) Added Size method: this implied that Fixed8 implements now the serializable interface. 2) Added few arithmetic operation (Add, Sub, div): this will be used to calculated networkfeeand feePerByte. Changed return value of the Value() method to int instead of int64. Modified fixed8_test accordingly. * Implemented Size or MarshalJSON method. - Structs accepting the Size method implement the serializable interface. - Structs accepting the MarshalJSON method implements the customized json marshaller interface. * Added fee calculation * Implemented rcp server method GetRawTransaction * Updated Tests * Fixed: 1) NewFixed8 will accept as input int64 2) race condition affecting configDeafault, blockchainDefault * Simplified Size calculation * 1) Removed global variable blockchainDefault, configDefault 2) Extended Blockchainer interface to include the methods: References, FeePerByte, SystemFee, NetworkFee 3) Deleted fee_test.go, fee.go. Moved corresponding methods to blockchain_test.go and blockchain.go respectively 4) Amended tx_raw_output.go * Simplified GetVarSize Method * Replaced ValueAtAndType with ValueWithType * Cosmetic changes + Added test case getrawtransaction_7 * Clean up Print statement * Filled up keys * Aligned verbose logic with the C#-neo implementation * Implemented @Kim requests Refactor server_test.go * Small fixes * Fixed verbose logic Added more tests Cosmetic changes * Replaced assert.NoError with require.NoError * Fixed tests by adding context.Background() as argument * Fixed tests
2019-02-20 17:39:32 +00:00
// Size returns the size in number of bytes of Fixed8.
func (f *Fixed8) Size() int {
return 8
}
// MarshalJSON implements the json marshaller interface.
func (f Fixed8) MarshalJSON() ([]byte, error) {
return []byte(`"` + f.String() + `"`), nil
}
Implemented rpc server method GetRawTransaction (#135) * Added utility function GetVarSize * 1) Added Size method: this implied that Fixed8 implements now the serializable interface. 2) Added few arithmetic operation (Add, Sub, div): this will be used to calculated networkfeeand feePerByte. Changed return value of the Value() method to int instead of int64. Modified fixed8_test accordingly. * Implemented Size or MarshalJSON method. - Structs accepting the Size method implement the serializable interface. - Structs accepting the MarshalJSON method implements the customized json marshaller interface. * Added fee calculation * Implemented rcp server method GetRawTransaction * Updated Tests * Fixed: 1) NewFixed8 will accept as input int64 2) race condition affecting configDeafault, blockchainDefault * Simplified Size calculation * 1) Removed global variable blockchainDefault, configDefault 2) Extended Blockchainer interface to include the methods: References, FeePerByte, SystemFee, NetworkFee 3) Deleted fee_test.go, fee.go. Moved corresponding methods to blockchain_test.go and blockchain.go respectively 4) Amended tx_raw_output.go * Simplified GetVarSize Method * Replaced ValueAtAndType with ValueWithType * Cosmetic changes + Added test case getrawtransaction_7 * Clean up Print statement * Filled up keys * Aligned verbose logic with the C#-neo implementation * Implemented @Kim requests Refactor server_test.go * Small fixes * Fixed verbose logic Added more tests Cosmetic changes * Replaced assert.NoError with require.NoError * Fixed tests by adding context.Background() as argument * Fixed tests
2019-02-20 17:39:32 +00:00
// Satoshi defines the value of a 'Satoshi'.
func Satoshi() Fixed8 {
return NewFixed8(1)
}
// Div implements Fixd8 division operator.
func (f Fixed8) Div(i int64) Fixed8 {
return NewFixed8(f.Value() / i)
}
// Add implements Fixd8 addition operator.
func (f Fixed8) Add(g Fixed8) Fixed8 {
return NewFixed8(f.Value() + g.Value())
}
// Sub implements Fixd8 subtraction operator.
func (f Fixed8) Sub(g Fixed8) Fixed8 {
return NewFixed8(f.Value() - g.Value())
}
// LessThan implements Fixd8 < operator.
func (f Fixed8) LessThan(g Fixed8) bool {
return f.Value() < g.Value()
}
// GreaterThan implements Fixd8 < operator.
func (f Fixed8) GreaterThan(g Fixed8) bool {
return f.Value() > g.Value()
}
// Equal implements Fixd8 == operator.
func (f Fixed8) Equal(g Fixed8) bool {
return f.Value() == g.Value()
}
// CompareTo returns the difference between the f and g.
// difference < 0 implies f < g.
// difference = 0 implies f = g.
// difference > 0 implies f > g.
func (f Fixed8) CompareTo(g Fixed8) int {
return int(f.Value() - g.Value())
}