common

package
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Published: Sep 27, 2020 License: GPL-3.0 Imports: 23 Imported by: 4

Documentation

Overview

Package common contains various helper functions.

Index

Constants

View Source
const (
	// HashLength is the expected length of the hash
	HashLength = 32
	// AddressLength is the expected length of the adddress
	AddressLength = 96
)

Lengths of hashes and addresses in bytes.

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(256)
	Big257 = big.NewInt(257)
)

Common big integers often used

Functions

func AbsolutePath

func AbsolutePath(datadir string, filename string) string

AbsolutePath returns datadir + filename, or filename if it is absolute.

func ByteSliceEqual

func ByteSliceEqual(a, b []byte) bool

func Bytes2Hex

func Bytes2Hex(d []byte) string

Bytes2Hex returns the hexadecimal encoding of d.

func BytesToString

func BytesToString(b []byte) string

func CopyBytes

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

CopyBytes returns an exact copy of the provided bytes.

func FileExist

func FileExist(filePath string) bool

FileExist checks if a file exists at filePath.

func FromHex

func FromHex(s string) []byte

FromHex returns the bytes represented by the hexadecimal string s. s may be prefixed with "0x".

func HashToHex

func HashToHex(hashs []Hash) []string

func Hex2Bytes

func Hex2Bytes(str string) []byte

Hex2Bytes returns the bytes represented by the hexadecimal string str.

func Hex2BytesFixed

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

Hex2BytesFixed returns bytes of a specified fixed length flen.

func Is0xPrefixHex

func Is0xPrefixHex(s string) bool

func IsString

func IsString(input []byte) bool

func LeftPadBytes

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

LeftPadBytes zero-pads slice to the left up to length l.

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 ethereum 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 RightPadBytes

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

RightPadBytes zero-pads slice to the right up to length l.

func ToHex deprecated

func ToHex(b []byte) string

ToHex returns the hex representation of b, prefixed with '0x'. For empty slices, the return value is "0x0".

Deprecated: use hexutil.Encode instead.

Types

type Address

type Address [AddressLength]byte

Data represents the 64 byte Data of an Ethereum account.

func Base58ToAddress

func Base58ToAddress(s string) Address

func BigToAddress

func BigToAddress(b *big.Int) Address

BigToAddress returns Data with byte values of b. If b is larger than len(h), b will be cropped from the left.

func BytesToAddress

func BytesToAddress(b []byte) Address

BytesToAddress returns Data with value b. If b is larger than len(h), b will be cropped from the left.

func (Address) Base58

func (a Address) Base58() string

Base58 returns base58 string representation of the Data.

func (Address) Big

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

Big converts an Data to a big integer.

func (Address) Bytes

func (a Address) Bytes() []byte

Bytes gets the string representation of the underlying Data.

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) IsAccountAddress

func (a Address) IsAccountAddress() bool

func (Address) MarshalText

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

MarshalText returns the hex representation of a.

func (*Address) Scan

func (a *Address) Scan(src interface{}) error

Scan implements Scanner for database/sql.

func (*Address) SetBytes

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

SetBytes sets the Data to the value of b. If b is larger than len(a) it will panic.

func (Address) String

func (a Address) String() string

String implements fmt.Stringer.

func (Address) ToCaddr

func (a Address) ToCaddr() ContractAddress

func (Address) ToPKr

func (a Address) ToPKr() *c_type.PKr

func (Address) ToUint512

func (a Address) ToUint512() *c_type.Uint512

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.

func (Address) Value

func (a Address) Value() (driver.Value, error)

Value implements valuer for database/sql.

type AddressList

type AddressList []Address

func (AddressList) Len

func (self AddressList) Len() int

func (AddressList) Less

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

func (AddressList) Swap

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

type ContractAddress

type ContractAddress [20]byte

func BigToContractAddress

func BigToContractAddress(b *big.Int) ContractAddress

func BytesToContractAddress

func BytesToContractAddress(b []byte) ContractAddress

func (ContractAddress) Big

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

Hash converts an Data to a hash by left-padding it with zeros.

func (ContractAddress) MarshalText

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

func (*ContractAddress) SetBytes

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

func (*ContractAddress) UnmarshalText

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

UnmarshalText parses a hash in hex syntax.

type Hash

type Hash [HashLength]byte

Hash represents the 32 byte Keccak256 hash of arbitrary data.

func BigToHash

func BigToHash(b *big.Int) Hash

BigToHash sets byte representation of b to hash. If b is larger than len(h), b will be cropped from the left.

func BytesToHash

func BytesToHash(b []byte) Hash

BytesToHash sets b to hash. If b is larger than len(h), b will be cropped from the left.

func HexToHash

func HexToHash(s string) Hash

HexToHash sets byte representation of s to hash. If b is larger than len(h), b will be cropped from the left.

func (Hash) Big

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

Big converts a hash to a big integer.

func (Hash) Bytes

func (h Hash) Bytes() []byte

Bytes gets the byte representation of the underlying hash.

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) HashToUint256

func (h Hash) HashToUint256() *c_type.Uint256

func (Hash) Hex

func (h Hash) Hex() string

Hex converts a hash to a hex string.

func (Hash) MarshalText

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

MarshalText returns the hex representation of h.

func (*Hash) Scan

func (h *Hash) Scan(src interface{}) error

Scan implements Scanner for database/sql.

func (*Hash) SetBytes

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

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

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.

func (Hash) Value

func (h Hash) Value() (driver.Value, error)

Value implements valuer for database/sql.

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

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 UnprefixedAddress

type UnprefixedAddress Address

UnprefixedAddress allows marshaling an Data without 0x prefix.

func (UnprefixedAddress) MarshalText

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

MarshalText encodes the Data as hex.

func (*UnprefixedAddress) UnmarshalText

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

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.

Directories

Path Synopsis
Package bitutil implements fast bitwise operations.
Package bitutil implements fast bitwise operations.
Package compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
Package compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
Package hexutil implements hex encoding with 0x prefix.
Package hexutil implements hex encoding with 0x prefix.
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

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