common

Documentation

Index

• Variables
• func BigIntDivCeil(a, b *big.Int) *big.Int
• func ConvertUnmarshalledUint(x interface{}) (uint64, error)
• func CreateDirSafe(path string, perms fs.FileMode) error
• func DirectoryExists(directoryPath string) bool
• func EncodeBytesToUint64(b []byte) uint64
• func EncodeUint64ToBytes(value uint64) []byte
• func ExtendByteSlice(b []byte, needLength int) []byte
• func FileExists(filePath string) bool
• func GetTerminationSignalCh() <-chan os.Signal
• func Max(a, b uint64) uint64
• func Min(a, b uint64) uint64
• func PadLeftOrTrim(bb []byte, size int) []byte
• func SaveFileSafe(path string, data []byte, perms fs.FileMode) error
• func SetupDataDir(dataDir string, paths []string, perms fs.FileMode) error
• func ToFixedFloat(num float64, precision int) float64
• type JSONNumber
  • func (d *JSONNumber) MarshalJSON() ([]byte, error)
  • func (d *JSONNumber) UnmarshalJSON(data []byte) error

Variables

var (
	// MaxSafeJSInt represents max value which JS support
	// It is used for smartContract fields
	// Our staking repo is written in JS, as are many other clients
	// If we use higher value JS will not be able to parse it
	MaxSafeJSInt = uint64(math.Pow(2, 53) - 2)
)

Functions

func BigIntDivCeil

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

BigIntDivCeil performs integer division and rounds given result to next bigger integer number It is calculated using this formula result = (a + b - 1) / b

func ConvertUnmarshalledUint

func ConvertUnmarshalledUint(x interface{}) (uint64, error)

func CreateDirSafe

func CreateDirSafe(path string, perms fs.FileMode) error

Creates a directory at path and with perms level permissions. If directory already exists, owner and permissions are verified.

func DirectoryExists

func DirectoryExists(directoryPath string) bool

DirectoryExists checks if the directory at the specified path exists

func EncodeBytesToUint64

func EncodeBytesToUint64(b []byte) uint64

EncodeBytesToUint64 big endian byte slice to uint64

func EncodeUint64ToBytes

func EncodeUint64ToBytes(value uint64) []byte

EncodeUint64ToBytes encodes provided uint64 to big endian byte slice

func ExtendByteSlice

func ExtendByteSlice(b []byte, needLength int) []byte

ExtendByteSlice extends given byte slice by needLength parameter and trims it

func FileExists

func FileExists(filePath string) bool

Checks if the file at the specified path exists

func GetTerminationSignalCh

func GetTerminationSignalCh() <-chan os.Signal

GetTerminationSignalCh returns a channel to emit signals by ctrl + c

func Max

func Max(a, b uint64) uint64

Max returns the strictly bigger number

func Min

func Min(a, b uint64) uint64

Min returns the strictly lower number

func PadLeftOrTrim

func PadLeftOrTrim(bb []byte, size int) []byte

PadLeftOrTrim left-pads the passed in byte array to the specified size, or trims the array if it exceeds the passed in size

func SaveFileSafe

func SaveFileSafe(path string, data []byte, perms fs.FileMode) error

Creates a file at path and with perms level permissions. If file already exists, owner and permissions are verified, and the file is overwritten.

func SetupDataDir

func SetupDataDir(dataDir string, paths []string, perms fs.FileMode) error

SetupDataDir sets up the data directory and the corresponding sub-directories

func ToFixedFloat

func ToFixedFloat(num float64, precision int) float64

Types

type JSONNumber

type JSONNumber struct {
	Value uint64
}

JSONNumber is the number represented in decimal or hex in json

func (*JSONNumber) MarshalJSON

func (d *JSONNumber) MarshalJSON() ([]byte, error)

func (*JSONNumber) UnmarshalJSON

func (d *JSONNumber) UnmarshalJSON(data []byte) error