common

package
v20.10.0+incompatible Latest Latest
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 Go to latest Published: Oct 27, 2020 License: GPL-3.0 Imports: 18 Imported by: 0

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 address
	AddressLength = 20
	// length of the hash returned by Private Transaction Manager
	EncryptedPayloadHashLength = 64
)

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 Bytes2Hex 

func Bytes2Hex(d []byte) string

Bytes2Hex returns the hexadecimal encoding of d.

func CopyBytes 

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

CopyBytes returns an exact copy of the provided bytes.

func EmptyEncryptedPayloadHash 

func EmptyEncryptedPayloadHash(eph EncryptedPayloadHash) bool

func EmptyHash 

func EmptyHash(h Hash) bool

func FileExist 

func FileExist(filePath string) bool

FileExist checks if a file exists at filePath.

func FormatTerminalString 

func FormatTerminalString(data []byte) string

Print hex but only first 3 and last 3 bytes

func FromHex 

func FromHex(s string) []byte

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

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 IsHexAddress 

func IsHexAddress(s string) bool

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

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.

func ToHexArray 

func ToHexArray(b [][]byte) []string

ToHexArray creates a array of hex-string based on []byte

func TrimLeftZeroes 

func TrimLeftZeroes(s []byte) []byte

TrimLeftZeroes returns a subslice of s without leading zeroes

Types

type Address 

type Address [AddressLength]byte

Address represents the 20 byte address of an Ethereum account.

func BigToAddress 

func BigToAddress(b *big.Int) Address

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

func HexToAddress 

func HexToAddress(s string) Address

HexToAddress returns Address with byte values of s. If s is larger than len(h), s will be cropped from the left.

func StringToAddress 

func StringToAddress(s string) Address

func (Address) Bytes 

func (a Address) Bytes() []byte

Bytes gets the string representation of the underlying address.

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

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

func (Address) Hex 

func (a Address) Hex() string

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

func (Address) ImplementsGraphQLType 

func (a Address) ImplementsGraphQLType(name string) bool

ImplementsGraphQLType returns true if Hash implements the specified GraphQL type.

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 address 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) UnmarshalGraphQL 

func (a *Address) UnmarshalGraphQL(input interface{}) error

UnmarshalGraphQL unmarshals the provided GraphQL query data.

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 DecryptRequest 

type DecryptRequest struct {
	SenderKey       []byte   `json:"senderKey"`
	CipherText      []byte   `json:"cipherText"`
	CipherTextNonce []byte   `json:"cipherTextNonce"`
	RecipientBoxes  []string `json:"recipientBoxes"`
	RecipientNonce  []byte   `json:"recipientNonce"`
	RecipientKeys   []string `json:"recipientKeys"`
}

type EncryptedPayloadHash 

type EncryptedPayloadHash [EncryptedPayloadHashLength]byte

Hash, returned by Private Transaction Manager, represents the 64-byte hash of encrypted payload

func Base64ToEncryptedPayloadHash 

func Base64ToEncryptedPayloadHash(b64 string) (EncryptedPayloadHash, error)

func BytesToEncryptedPayloadHash 

func BytesToEncryptedPayloadHash(b []byte) EncryptedPayloadHash

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

func (EncryptedPayloadHash) Bytes 

func (eph EncryptedPayloadHash) Bytes() []byte

func (EncryptedPayloadHash) BytesTypeRef 

func (eph EncryptedPayloadHash) BytesTypeRef() *hexutil.Bytes

func (EncryptedPayloadHash) Hex 

func (eph EncryptedPayloadHash) Hex() string

func (*EncryptedPayloadHash) SetBytes 

func (eph *EncryptedPayloadHash) SetBytes(b []byte)

func (EncryptedPayloadHash) String 

func (eph EncryptedPayloadHash) String() string

func (EncryptedPayloadHash) TerminalString 

func (eph EncryptedPayloadHash) TerminalString() string

func (EncryptedPayloadHash) ToBase64 

func (eph EncryptedPayloadHash) ToBase64() string

type EncryptedPayloadHashes 

type EncryptedPayloadHashes map[EncryptedPayloadHash]struct{}

Using map to enable fast lookup

func Base64sToEncryptedPayloadHashes 

func Base64sToEncryptedPayloadHashes(b64s []string) (EncryptedPayloadHashes, error)

func (EncryptedPayloadHashes) Add 

func (ephs EncryptedPayloadHashes) Add(eph EncryptedPayloadHash)

func (EncryptedPayloadHashes) NotExist 

func (ephs EncryptedPayloadHashes) NotExist(eph EncryptedPayloadHash) bool

func (EncryptedPayloadHashes) ToBase64s 

func (ephs EncryptedPayloadHashes) ToBase64s() []string

type Hash 

type Hash [HashLength]byte

Hash represents the 32 byte Keccak256 hash of arbitrary data.

func Base64ToHash 

func Base64ToHash(b64 string) (Hash, error)

Decode base64 string to Hash if String is empty then return empty hash

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 StringToHash 

func StringToHash(s string) Hash

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) Hex 

func (h Hash) Hex() string

Hex converts a hash to a hex string.

func (Hash) ImplementsGraphQLType 

func (_ Hash) ImplementsGraphQLType(name string) bool

ImplementsGraphQLType returns true if Hash implements the specified GraphQL type.

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) ToBase64 

func (h Hash) ToBase64() string

func (*Hash) UnmarshalGraphQL 

func (h *Hash) UnmarshalGraphQL(input interface{}) error

UnmarshalGraphQL unmarshals the provided GraphQL query data.

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 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 PrettyAge 

type PrettyAge time.Time

PrettyAge is a pretty printed version of a time.Duration value that rounds the values up to a single most significant unit, days/weeks/years included.

func (PrettyAge) String 

func (t PrettyAge) String() string

String implements the Stringer interface, allowing pretty printing of duration values rounded to the most significant time unit.

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 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

View all Source files

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
Package prque implements a priority queue data structure supporting arbitrary value types and int64 priorities.
 Package prque implements a priority queue data structure supporting arbitrary value types and int64 priorities.

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