common

package
v0.0.0-...-5e88e9b Latest Latest
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 Go to latest Published: Jul 17, 2019 License: GPL-3.0 Imports: 19 Imported by: 0

Documentation

Overview

Package common contains various helper functions.

Index

Constants

View Source 
const (
	HashLength        = 32
	AddressLength     = 20
	AddressHashLength = 4
)

Variables

View Source 
var (
	Big1   = big.NewInt(1)
	Big2   = big.NewInt(2)
	Big3   = big.NewInt(3)
	Big0   = big.NewInt(0)
	Big32  = big.NewInt(32)
	Big256 = big.NewInt(0xff)
	Big257 = big.NewInt(257)
)

Common big integers often used

Functions

func AbsolutePath 

func AbsolutePath(Datadir string, filename string) string

func Bytes2Hex 

func Bytes2Hex(d []byte) string

func Contains 

func Contains(obj interface{}, target interface{}) (bool, error)

判断obj是否在target中，target支持的类型arrary,slice,map

func CopyBytes 

func CopyBytes(b []byte) (copiedBytes []byte)

Copy bytes

Returns an exact copy of the provided bytes

func EmptyHash 

func EmptyHash(h Hash) bool

func FileExist 

func FileExist(filePath string) bool

func Fnv_hash_to_byte 

func Fnv_hash_to_byte(data ...[]byte) []byte

Fowler–Noll–Vo is a non-cryptographic hash function created by Glenn Fowler, Landon Curt Noll, and Kiem-Phong Vo. The basis of the FNV hash algorithm was taken from an idea sent as reviewer comments to the IEEE POSIX P1003.2 committee by Glenn Fowler and Phong Vo in 1991. In a subsequent ballot round, Landon Curt Noll improved on their algorithm. In an email message to Landon, they named it the Fowler/Noll/Vo or FNV hash. https://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function

func FromHex 

func FromHex(s string) []byte

func Hex2Bytes 

func Hex2Bytes(str string) []byte

func Hex2BytesFixed 

func Hex2BytesFixed(str string, flen int) []byte

func IsAddrHas0xPre 

func IsAddrHas0xPre(str string) bool

func IsHex 

func IsHex(str string) bool

func IsHexAddress 

func IsHexAddress(s string) bool

IsHexAddress verifies whether a string can represent a valid hex-encoded Hpb address or not.

func LeftPadBytes 

func LeftPadBytes(slice []byte, l int) []byte

func LoadJSON 

func LoadJSON(file string, val interface{}) error

LoadJSON reads the given file and unmarshals its content.

func MakeName 

func MakeName(name, version string) string

MakeName creates a node name that follows the hpb convention for such names. It adds the operation system name and Go runtime version the name.

func PrintDepricationWarning 

func PrintDepricationWarning(str string)

PrintDepricationWarning prinst the given string in a box using fmt.Println.

func Report 

func Report(extra ...interface{})

Report gives off a warning requesting the user to submit an issue to the github tracker.

func RexRep0xToHpb 

func RexRep0xToHpb(str *string) string

func RexRepHpbTo0x 

func RexRepHpbTo0x(str *string) string

func RightPadBytes 

func RightPadBytes(slice []byte, l int) []byte

func ToHex 

func ToHex(b []byte) string

Types

type Address 

type Address [AddressLength]byte

Address represents the 20 byte address of an Hpb account.

func BigToAddress 

func BigToAddress(b *big.Int) Address

func BytesToAddress 

func BytesToAddress(b []byte) Address

func HexToAddress 

func HexToAddress(s string) Address

func StringToAddress 

func StringToAddress(s string) Address

func (Address) Big 

func (a Address) Big() *big.Int

func (Address) Bytes 

func (a Address) Bytes() []byte

func (Address) Format 

func (a Address) Format(s fmt.State, c rune)

Format implements fmt.Formatter, forcing the byte slice to be formatted as is, without going through the stringer interface used for logging.

func (Address) Hash 

func (a Address) Hash() Hash

func (Address) Hex 

func (a Address) Hex() string

Hex returns an EIP55-compliant hex string representation of the address.

func (Address) MarshalText 

func (a Address) MarshalText() ([]byte, error)

MarshalText returns the hex representation of a.

func (*Address) Set 

func (a *Address) Set(other Address)

Sets a to other

func (*Address) SetBytes 

func (a *Address) SetBytes(b []byte)

Sets the address to the value of b. If b is larger than len(a) it will panic

func (*Address) SetString 

func (a *Address) SetString(s string)

Set string `s` to a. If s is larger than len(a) it will panic

func (Address) Str 

func (a Address) Str() string

Get the string representation of the underlying address

func (Address) String 

func (a Address) String() string

String implements the stringer interface and is used also by the logger.

func (*Address) UnmarshalJSON 

func (a *Address) UnmarshalJSON(input []byte) error

UnmarshalJSON parses a hash in hex syntax.

func (*Address) UnmarshalText 

func (a *Address) UnmarshalText(input []byte) error

UnmarshalText parses a hash in hex syntax.

type AddressHash 

type AddressHash [AddressHashLength]byte

func (AddressHash) Big 

func (a AddressHash) Big() *big.Int

func (AddressHash) Bytes 

func (a AddressHash) Bytes() []byte

func (AddressHash) Format 

func (a AddressHash) Format(s fmt.State, c rune)

Format implements fmt.Formatter, forcing the byte slice to be formatted as is, without going through the stringer interface used for logging.

func (AddressHash) Hash 

func (a AddressHash) Hash() Hash

func (AddressHash) Hex 

func (a AddressHash) Hex() string

Hex returns an EIP55-compliant hex string representation of the address.

func (AddressHash) MarshalText 

func (a AddressHash) MarshalText() ([]byte, error)

MarshalText returns the hex representation of a.

func (*AddressHash) Set 

func (a *AddressHash) Set(other Address)

Sets a to other

func (*AddressHash) SetHashBytes 

func (ah *AddressHash) SetHashBytes(b []byte)

Sets the address to the value of b. If b is larger than len(a) it will panic

func (*AddressHash) SetString 

func (a *AddressHash) SetString(s string)

Set string `s` to a. If s is larger than len(a) it will panic

func (AddressHash) Str 

func (a AddressHash) Str() string

Get the string representation of the underlying address

func (AddressHash) String 

func (a AddressHash) String() string

String implements the stringer interface and is used also by the logger.

func (*AddressHash) UnmarshalJSON 

func (a *AddressHash) UnmarshalJSON(input []byte) error

UnmarshalJSON parses a hash in hex syntax.

func (*AddressHash) UnmarshalText 

func (a *AddressHash) UnmarshalText(input []byte) error

UnmarshalText parses a hash in hex syntax.

type Addresses 

type Addresses []Address

func (Addresses) Len 

func (self Addresses) Len() int

func (Addresses) Less 

func (self Addresses) Less(i, j int) bool

func (Addresses) Swap 

func (self Addresses) Swap(i, j int)

type Hash 

type Hash [HashLength]byte

Hash represents the 32 byte Keccak256 hash of arbitrary data.

func BigToHash 

func BigToHash(b *big.Int) Hash

func BytesToHash 

func BytesToHash(b []byte) Hash

func HexToHash 

func HexToHash(s string) Hash

func StringToHash 

func StringToHash(s string) Hash

func (Hash) Big 

func (h Hash) Big() *big.Int

func (Hash) Bytes 

func (h Hash) Bytes() []byte

func (Hash) Format 

func (h Hash) Format(s fmt.State, c rune)

Format implements fmt.Formatter, forcing the byte slice to be formatted as is, without going through the stringer interface used for logging.

func (Hash) Generate 

func (h Hash) Generate(rand *rand.Rand, size int) reflect.Value

Generate implements testing/quick.Generator.

func (Hash) Hex 

func (h Hash) Hex() string

func (Hash) MarshalText 

func (h Hash) MarshalText() ([]byte, error)

MarshalText returns the hex representation of h.

func (*Hash) Set 

func (h *Hash) Set(other Hash)

Sets h to other

func (*Hash) SetBytes 

func (h *Hash) SetBytes(b []byte)

Sets the hash to the value of b. If b is larger than len(h), 'b' will be cropped (from the left).

func (*Hash) SetString 

func (h *Hash) SetString(s string)

Set string `s` to h. If s is larger than len(h) s will be cropped (from left) to fit.

func (Hash) Str 

func (h Hash) Str() string

Get the string representation of the underlying hash

func (Hash) String 

func (h Hash) String() string

String implements the stringer interface and is used also by the logger when doing full logging into a file.

func (Hash) TerminalString 

func (h Hash) TerminalString() string

TerminalString implements log.TerminalStringer, formatting a string for console output during logging.

func (*Hash) UnmarshalJSON 

func (h *Hash) UnmarshalJSON(input []byte) error

UnmarshalJSON parses a hash in hex syntax.

func (*Hash) UnmarshalText 

func (h *Hash) UnmarshalText(input []byte) error

UnmarshalText parses a hash in hex syntax.

type PrettyDuration 

type PrettyDuration time.Duration

PrettyDuration is a pretty printed version of a time.Duration value that cuts the unnecessary precision off from the formatted textual representation.

func (PrettyDuration) String 

func (d PrettyDuration) String() string

String implements the Stringer interface, allowing pretty printing of duration values rounded to three decimals.

type StorageSize 

type StorageSize float64

func (StorageSize) Int64 

func (self StorageSize) Int64() int64

func (StorageSize) String 

func (self StorageSize) String() string

type UnprefixedAddress 

type UnprefixedAddress Address

UnprefixedHash allows marshaling an Address without 0x prefix.

func (UnprefixedAddress) MarshalText 

func (a UnprefixedAddress) MarshalText() ([]byte, error)

MarshalText encodes the address as hex.

func (*UnprefixedAddress) UnmarshalText 

func (a *UnprefixedAddress) UnmarshalText(input []byte) error

UnmarshalText decodes the address from hex. The 0x prefix is optional.

type UnprefixedAddressHash 

type UnprefixedAddressHash AddressHash

UnprefixedHash allows marshaling an Address without 0x prefix.

func (UnprefixedAddressHash) MarshalText 

func (a UnprefixedAddressHash) MarshalText() ([]byte, error)

MarshalText encodes the address as hex.

func (*UnprefixedAddressHash) UnmarshalText 

func (a *UnprefixedAddressHash) UnmarshalText(input []byte) error

UnmarshalText decodes the address from hex. The 0x prefix is optional.

type UnprefixedHash 

type UnprefixedHash Hash

UnprefixedHash allows marshaling a Hash without 0x prefix.

func (UnprefixedHash) MarshalText 

func (h UnprefixedHash) MarshalText() ([]byte, error)

MarshalText encodes the hash as hex.

func (*UnprefixedHash) UnmarshalText 

func (h *UnprefixedHash) UnmarshalText(input []byte) error

UnmarshalText decodes the hash from hex. The 0x prefix is optional.

Source Files

View all Source files

Directories

Path Synopsis
Package bitutil implements fast bitwise operations.
 Package bitutil implements fast bitwise operations.
Package compiler wraps the Solidity compiler executable (solc).
 Package compiler wraps the Solidity compiler executable (solc).
bn256
Package bn256 implements a particular bilinear group at the 128-bit security level.
 Package bn256 implements a particular bilinear group at the 128-bit security level.
ecies
randentropy
secp256k1
Package secp256k1 wraps the bitcoin secp256k1 C library.
 Package secp256k1 wraps the bitcoin secp256k1 C library.
sha3
Package sha3 implements the SHA-3 fixed-output-length hash functions and the SHAKE variable-output-length hash functions defined by FIPS-202.
 Package sha3 implements the SHA-3 fixed-output-length hash functions and the SHAKE variable-output-length hash functions defined by FIPS-202.
Package hexutil implements hex encoding with 0x prefix.
 Package hexutil implements hex encoding with 0x prefix.
log
Package log15 provides an opinionated, simple toolkit for best-practice logging that is both human and machine readable.
 Package log15 provides an opinionated, simple toolkit for best-practice logging that is both human and machine readable.
term
Package math provides integer math utilities.
 Package math provides integer math utilities.
package mclock is a wrapper for a monotonic clock source
 package mclock is a wrapper for a monotonic clock source
Package metrics provides general system and process level metrics collection.
 Package metrics provides general system and process level metrics collection.
Package rlp implements the RLP serialization format.
 Package rlp implements the RLP serialization format.
Package trie implements Merkle Patricia Tries.
 Package trie implements Merkle Patricia Tries.

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