Documentation ¶
Overview ¶
Package common contains various helper functions.
*
- @Author: yzy
- @Description:
- @Version: 1.0.0
- @Date: 2021/9/23 15:49
- @Copyright: MIN-Group;国家重大科技基础设施——未来网络北大实验室;深圳市信息论与未来网络重点实验室
Package hexutil implements hex encoding with 0x prefix. This encoding is used by the Ethereum RPC API to transport binary data in JSON payloads.
Encoding Rules ¶
All hex data must have prefix "0x".
For byte slices, the hex data must be of even length. An empty byte slice encodes as "0x".
Integers are encoded using the least amount of digits (no leading zero digits). Their encoding may be of uneven length. The number zero encodes as "0x0".
Index ¶
- Constants
- Variables
- func AbsolutePath(datadir string, filename string) string
- func Bytes2Hex(d []byte) string
- func CopyBytes(b []byte) (copiedBytes []byte)
- func Decode(input string) ([]byte, error)
- func DecodeBig(input string) (*big.Int, error)
- func DecodeUint64(input string) (uint64, error)
- func Encode(b []byte) string
- func EncodeBig(bigint *big.Int) string
- func EncodeUint64(i uint64) string
- func FileExist(filePath string) bool
- func FromHex(s string) []byte
- func Hex2Bytes(str string) []byte
- func Hex2BytesFixed(str string, flen int) []byte
- func IsHexAddress(s string) bool
- func LeftPadBytes(slice []byte, l int) []byte
- func LoadJSON(file string, val interface{}) error
- func MakeName(name, version string) string
- func MustDecode(input string) []byte
- func MustDecodeBig(input string) *big.Int
- func MustDecodeUint64(input string) uint64
- func PrintDeprecationWarning(str string)
- func Report(extra ...interface{})
- func RightPadBytes(slice []byte, l int) []byte
- func ToHex(b []byte) stringdeprecated
- func UnmarshalFixedJSON(typ reflect.Type, input, out []byte) error
- func UnmarshalFixedText(typname string, input, out []byte) error
- func UnmarshalFixedUnprefixedText(typname string, input, out []byte) error
- type Address
- func (a Address) Big() *big.Int
- func (a Address) Bytes() []byte
- func (a Address) Format(s fmt.State, c rune)
- func (a Address) Hash() Hash
- func (a Address) Hex() string
- func (a Address) MarshalText() ([]byte, error)
- func (a *Address) SetBytes(b []byte)
- func (a Address) String() string
- func (a *Address) UnmarshalJSON(input []byte) error
- func (a *Address) UnmarshalText(input []byte) error
- type Big
- type Bytes
- type Hash
- func (h Hash) Big() *big.Int
- func (h Hash) Bytes() []byte
- func (h Hash) Format(s fmt.State, c rune)
- func (h Hash) Generate(rand *rand.Rand, size int) reflect.Value
- func (h Hash) Hex() string
- func (h Hash) MarshalText() ([]byte, error)
- func (h *Hash) SetBytes(b []byte)
- func (h Hash) String() string
- func (h Hash) TerminalString() string
- func (h *Hash) UnmarshalJSON(input []byte) error
- func (h *Hash) UnmarshalText(input []byte) error
- type MixedcaseAddress
- func (ma *MixedcaseAddress) Address() Address
- func (ma *MixedcaseAddress) MarshalJSON() ([]byte, error)
- func (ma *MixedcaseAddress) Original() string
- func (ma *MixedcaseAddress) String() string
- func (ma *MixedcaseAddress) UnmarshalJSON(input []byte) error
- func (ma *MixedcaseAddress) ValidChecksum() bool
- type StorageSize
- type Uint
- type Uint64
- type UnprefixedAddress
- type UnprefixedHash
Constants ¶
const ( HashLength = 32 AddressLength = 20 )
Lengths of hashes and addresses in bytes.
Variables ¶
var ( Big1 = big.NewInt(1) Big2 = big.NewInt(2) Big3 = big.NewInt(3) Big0 = big.NewInt(0) Big32 = big.NewInt(32) Big256 = big.NewInt(256) Big257 = big.NewInt(257) )
Common big integers often used
var ( ErrEmptyString = &decError{"empty hex string"} ErrSyntax = &decError{"invalid hex string"} ErrMissingPrefix = &decError{"hex string without 0x prefix"} ErrOddLength = &decError{"hex string of odd length"} ErrEmptyNumber = &decError{"hex string \"0x\""} ErrLeadingZero = &decError{"hex number with leading zero digits"} ErrUint64Range = &decError{"hex number > 64 bits"} ErrUintRange = &decError{fmt.Sprintf("hex number > %d bits", uintBits)} ErrBig256Range = &decError{"hex number > 256 bits"} )
Errors
Functions ¶
func AbsolutePath ¶
AbsolutePath returns datadir + filename, or filename if it is absolute.
func DecodeBig ¶
DecodeBig decodes a hex string with 0x prefix as a quantity. Numbers larger than 256 bits are not accepted.
func DecodeUint64 ¶
DecodeUint64 decodes a hex string with 0x prefix as a quantity.
func EncodeBig ¶
EncodeBig encodes bigint as a hex string with 0x prefix. The sign of the integer is ignored.
func EncodeUint64 ¶
EncodeUint64 encodes i as a hex string with 0x prefix.
func FromHex ¶
FromHex returns the bytes represented by the hexadecimal string s. s may be prefixed with "0x".
func Hex2BytesFixed ¶
Hex2BytesFixed returns bytes of a specified fixed length flen.
func IsHexAddress ¶
IsHexAddress verifies whether a string can represent a valid hex-encoded Ethereum address or not.
func LeftPadBytes ¶
LeftPadBytes zero-pads slice to the left up to length l.
func MakeName ¶
MakeName creates a node name that follows the ethereum convention for such names. It adds the operation system name and Go runtime version the name.
func MustDecode ¶
MustDecode decodes a hex string with 0x prefix. It panics for invalid input.
func MustDecodeBig ¶
MustDecodeBig decodes a hex string with 0x prefix as a quantity. It panics for invalid input.
func MustDecodeUint64 ¶
MustDecodeUint64 decodes a hex string with 0x prefix as a quantity. It panics for invalid input.
func PrintDeprecationWarning ¶
func PrintDeprecationWarning(str string)
PrintDeprecationWarning prints 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 RightPadBytes ¶
RightPadBytes zero-pads slice to the right up to length l.
func UnmarshalFixedJSON ¶
UnmarshalFixedJSON decodes the input as a string with 0x prefix. The length of out determines the required input length. This function is commonly used to implement the UnmarshalJSON method for fixed-size types.
func UnmarshalFixedText ¶
UnmarshalFixedText decodes the input as a string with 0x prefix. The length of out determines the required input length. This function is commonly used to implement the UnmarshalText method for fixed-size types.
func UnmarshalFixedUnprefixedText ¶
UnmarshalFixedUnprefixedText decodes the input as a string with optional 0x prefix. The length of out determines the required input length. This function is commonly used to implement the UnmarshalText method for fixed-size types.
Types ¶
type Address ¶
type Address [AddressLength]byte
Address represents the 20 byte address of an Ethereum account.
func BigToAddress ¶
BigToAddress returns Address with byte values of b. If b is larger than len(h), b will be cropped from the left.
func BytesToAddress ¶
BytesToAddress returns Address with value b. If b is larger than len(h), b will be cropped from the left.
func HexToAddress ¶
HexToAddress returns Address with byte values of s. If s is larger than len(h), s will be cropped from the left.
func (Address) Format ¶
Format implements fmt.Formatter, forcing the byte slice to be formatted as is, without going through the stringer interface used for logging.
func (Address) MarshalText ¶
MarshalText returns the hex representation of a.
func (*Address) SetBytes ¶
SetBytes sets the address to the value of b. If b is larger than len(a) it will panic.
func (*Address) UnmarshalJSON ¶
UnmarshalJSON parses a hash in hex syntax.
func (*Address) UnmarshalText ¶
UnmarshalText parses a hash in hex syntax.
type Big ¶
Big marshals/unmarshals as a JSON string with 0x prefix. The zero value marshals as "0x0".
Negative integers are not supported at this time. Attempting to marshal them will return an error. Values larger than 256bits are rejected by Unmarshal but will be marshaled without error.
func (Big) MarshalText ¶
MarshalText implements encoding.TextMarshaler
func (*Big) UnmarshalJSON ¶
UnmarshalJSON implements json.Unmarshaler.
func (*Big) UnmarshalText ¶
UnmarshalText implements encoding.TextUnmarshaler
type Bytes ¶
type Bytes []byte
Bytes marshals/unmarshals as a JSON string with 0x prefix. The empty slice marshals as "0x".
func (Bytes) MarshalText ¶
MarshalText implements encoding.TextMarshaler
func (*Bytes) UnmarshalJSON ¶
UnmarshalJSON implements json.Unmarshaler.
func (*Bytes) UnmarshalText ¶
UnmarshalText implements encoding.TextUnmarshaler.
type Hash ¶
type Hash [HashLength]byte
Hash represents the 32 byte Keccak256 hash of arbitrary data.
func BigToHash ¶
BigToHash sets byte representation of b to hash. If b is larger than len(h), b will be cropped from the left.
func BytesToHash ¶
BytesToHash sets b to hash. If b is larger than len(h), b will be cropped from the left.
func HexToHash ¶
HexToHash sets byte representation of s to hash. If b is larger than len(h), b will be cropped from the left.
func (Hash) Format ¶
Format implements fmt.Formatter, forcing the byte slice to be formatted as is, without going through the stringer interface used for logging.
func (Hash) MarshalText ¶
MarshalText returns the hex representation of h.
func (*Hash) SetBytes ¶
SetBytes sets the hash to the value of b. If b is larger than len(h), b will be cropped from the left.
func (Hash) String ¶
String implements the stringer interface and is used also by the logger when doing full logging into a file.
func (Hash) TerminalString ¶
TerminalString implements log.TerminalStringer, formatting a string for console output during logging.
func (*Hash) UnmarshalJSON ¶
UnmarshalJSON parses a hash in hex syntax.
func (*Hash) UnmarshalText ¶
UnmarshalText parses a hash in hex syntax.
type MixedcaseAddress ¶
type MixedcaseAddress struct {
// contains filtered or unexported fields
}
MixedcaseAddress retains the original string, which may or may not be correctly checksummed
func NewMixedcaseAddress ¶
func NewMixedcaseAddress(addr Address) MixedcaseAddress
NewMixedcaseAddress constructor (mainly for testing)
func NewMixedcaseAddressFromString ¶
func NewMixedcaseAddressFromString(hexaddr string) (*MixedcaseAddress, error)
NewMixedcaseAddressFromString is mainly meant for unit-testing
func (*MixedcaseAddress) Address ¶
func (ma *MixedcaseAddress) Address() Address
Address returns the address
func (*MixedcaseAddress) MarshalJSON ¶
func (ma *MixedcaseAddress) MarshalJSON() ([]byte, error)
MarshalJSON marshals the original value
func (*MixedcaseAddress) Original ¶
func (ma *MixedcaseAddress) Original() string
Original returns the mixed-case input string
func (*MixedcaseAddress) String ¶
func (ma *MixedcaseAddress) String() string
String implements fmt.Stringer
func (*MixedcaseAddress) UnmarshalJSON ¶
func (ma *MixedcaseAddress) UnmarshalJSON(input []byte) error
UnmarshalJSON parses MixedcaseAddress
func (*MixedcaseAddress) ValidChecksum ¶
func (ma *MixedcaseAddress) ValidChecksum() bool
ValidChecksum returns true if the address has valid checksum
type StorageSize ¶
type StorageSize float64
StorageSize is a wrapper around a float value that supports user friendly formatting.
func (StorageSize) String ¶
func (s StorageSize) String() string
String implements the stringer interface.
func (StorageSize) TerminalString ¶
func (s StorageSize) TerminalString() string
TerminalString implements log.TerminalStringer, formatting a string for console output during logging.
type Uint ¶
type Uint uint
Uint marshals/unmarshals as a JSON string with 0x prefix. The zero value marshals as "0x0".
func (Uint) MarshalText ¶
MarshalText implements encoding.TextMarshaler.
func (*Uint) UnmarshalJSON ¶
UnmarshalJSON implements json.Unmarshaler.
func (*Uint) UnmarshalText ¶
UnmarshalText implements encoding.TextUnmarshaler.
type Uint64 ¶
type Uint64 uint64
Uint64 marshals/unmarshals as a JSON string with 0x prefix. The zero value marshals as "0x0".
func (Uint64) MarshalText ¶
MarshalText implements encoding.TextMarshaler.
func (*Uint64) UnmarshalJSON ¶
UnmarshalJSON implements json.Unmarshaler.
func (*Uint64) UnmarshalText ¶
UnmarshalText implements encoding.TextUnmarshaler
type UnprefixedAddress ¶
type UnprefixedAddress Address
UnprefixedAddress 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 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 ¶
Directories ¶
Path | Synopsis |
---|---|
Package bitutil implements fast bitwise operations.
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Package bitutil implements fast bitwise operations. |
Package compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
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Package compiler wraps the Solidity and Vyper compiler executables (solc; vyper). |
Package hexutil implements hex encoding with 0x prefix.
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Package hexutil implements hex encoding with 0x prefix. |
Package math provides integer math utilities.
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Package math provides integer math utilities. |
Package mclock is a wrapper for a monotonic clock source
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Package mclock is a wrapper for a monotonic clock source |
Package prque implements a priority queue data structure supporting arbitrary value types and int64 priorities.
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Package prque implements a priority queue data structure supporting arbitrary value types and int64 priorities. |