typeddata

Documentation

Index

• Variables
• func ComputeTypedDataHash(typedData TypedData) ([]byte, error)
• func SignTextValidator(validatorData ValidatorData) (hexutil.Bytes, string)
• type NameValueType
  • func (nvt *NameValueType) Pprint(depth int) string
• type SigFormat
• type Type
• type TypePriority
• type TypedData
  • func (typedData *TypedData) Dependencies(primaryType string, found []string) []string
  • func (typedData *TypedData) EncodeData(primaryType string, data map[string]interface{}, depth int) (hexutil.Bytes, error)
  • func (typedData *TypedData) EncodePrimitiveValue(encType string, encValue interface{}, depth int) ([]byte, error)
  • func (typedData *TypedData) EncodeType(primaryType string) hexutil.Bytes
  • func (typedData *TypedData) Format() ([]*NameValueType, error)
  • func (typedData *TypedData) HashStruct(primaryType string, data TypedDataMessage) (hexutil.Bytes, error)
  • func (typedData *TypedData) Map() map[string]interface{}
  • func (typedData *TypedData) TypeHash(primaryType string) hexutil.Bytes
• type TypedDataDomain
  • func (domain *TypedDataDomain) Map() map[string]interface{}
• type TypedDataMessage
• type Types
• type ValidatorData
  • func UnmarshalValidatorData(data interface{}) (ValidatorData, error)

Variables

var (
	IntendedValidator = SigFormat{
		accounts.MimetypeDataWithValidator,
		0x00,
	}
	DataTyped = SigFormat{
		accounts.MimetypeTypedData,
		0x01,
	}
	ApplicationClique = SigFormat{
		accounts.MimetypeClique,
		0x02,
	}
	TextPlain = SigFormat{
		accounts.MimetypeTextPlain,
		0x45,
	}
)

Functions

func ComputeTypedDataHash

func ComputeTypedDataHash(typedData TypedData) ([]byte, error)

ComputeTypedDataHash computes keccak hash of typed data for signing.

func SignTextValidator

func SignTextValidator(validatorData ValidatorData) (hexutil.Bytes, string)

SignTextWithValidator signs the given message which can be further recovered with the given validator. hash = keccak256("\x19\x00"${address}${data}).

Types

type NameValueType

type NameValueType struct {
	Name  string      `json:"name"`
	Value interface{} `json:"value"`
	Typ   string      `json:"type"`
}

NameValueType is a very simple struct with Name, Value and Type. It's meant for simple json structures used to communicate signing-info about typed data with the UI

func (*NameValueType) Pprint

func (nvt *NameValueType) Pprint(depth int) string

Pprint returns a pretty-printed version of nvt

type SigFormat

type SigFormat struct {
	Mime        string
	ByteVersion byte
}

type Type

type Type struct {
	Name string `json:"name"`
	Type string `json:"type"`
}

type TypePriority

type TypePriority struct {
	Type  string
	Value uint
}

type TypedData

type TypedData struct {
	Types       Types            `json:"types"`
	PrimaryType string           `json:"primaryType"`
	Domain      TypedDataDomain  `json:"domain"`
	Message     TypedDataMessage `json:"message"`
}

func (*TypedData) Dependencies

func (typedData *TypedData) Dependencies(primaryType string, found []string) []string

Dependencies returns an array of custom types ordered by their hierarchical reference tree

func (*TypedData) EncodeData

func (typedData *TypedData) EncodeData(primaryType string, data map[string]interface{}, depth int) (hexutil.Bytes, error)

EncodeData generates the following encoding: `enc(value₁) ‖ enc(value₂) ‖ … ‖ enc(valueₙ)`

each encoded member is 32-byte long

func (*TypedData) EncodePrimitiveValue

func (typedData *TypedData) EncodePrimitiveValue(encType string, encValue interface{}, depth int) ([]byte, error)

EncodePrimitiveValue deals with the primitive values found while searching through the typed data

func (*TypedData) EncodeType

func (typedData *TypedData) EncodeType(primaryType string) hexutil.Bytes

EncodeType generates the following encoding: `name ‖ "(" ‖ member₁ ‖ "," ‖ member₂ ‖ "," ‖ … ‖ memberₙ ")"`

each member is written as `type ‖ " " ‖ name` encodings cascade down and are sorted by name

func (*TypedData) Format

func (typedData *TypedData) Format() ([]*NameValueType, error)

Format returns a representation of typedData, which can be easily displayed by a user-interface without in-depth knowledge about 712 rules

func (*TypedData) HashStruct

func (typedData *TypedData) HashStruct(primaryType string, data TypedDataMessage) (hexutil.Bytes, error)

HashStruct generates a keccak256 hash of the encoding of the provided data

func (*TypedData) Map

func (typedData *TypedData) Map() map[string]interface{}

Map generates a map version of the typed data

func (*TypedData) TypeHash

func (typedData *TypedData) TypeHash(primaryType string) hexutil.Bytes

TypeHash creates the keccak256 hash of the data

type TypedDataDomain

type TypedDataDomain struct {
	Name              string                `json:"name"`
	Version           string                `json:"version"`
	ChainId           *math.HexOrDecimal256 `json:"chainId"`
	VerifyingContract string                `json:"verifyingContract"`
	Salt              string                `json:"salt"`
}

func (*TypedDataDomain) Map

func (domain *TypedDataDomain) Map() map[string]interface{}

Map is a helper function to generate a map version of the domain

type TypedDataMessage

type TypedDataMessage = map[string]interface{}

type Types

type Types map[string][]Type

type ValidatorData

type ValidatorData struct {
	Address common.Address
	Message hexutil.Bytes
}

func UnmarshalValidatorData

func UnmarshalValidatorData(data interface{}) (ValidatorData, error)

UnmarshalValidatorData converts the bytes input to typed data