signature

Documentation

Index

• Constants
• func FromBytes(sig []byte) (r, s, v *big.Int, err error)
• func Hash(value any) string
• func RecoverAddress(value any, r, s, v *big.Int) (common.Address, error)
• func Sign(value any, pk *ecdsa.PrivateKey) (r, s, v *big.Int, err error)
• func ToBytes(r, s, v *big.Int) ([]byte, error)
• func ToBytesWithFitbitID(r, s, v *big.Int) ([]byte, error)
• func Verify(r, s, v *big.Int) error

Constants

const ZeroHash string = "0x0000000000000000000000000000000000000000000000000000000000000000"

ZeroHash represents a hash code of zeros.

Functions

func FromBytes

func FromBytes(sig []byte) (r, s, v *big.Int, err error)

FromBytes takes signature in []byte format and converts it to r, s, v format.

func Hash

func Hash(value any) string

Hash returns unique representation of the value.

func RecoverAddress

func RecoverAddress(value any, r, s, v *big.Int) (common.Address, error)

RecoverAddress takes any value and r, s, v signature representation and recovers Etherium account address associated with that signature.

func Sign

func Sign(value any, pk *ecdsa.PrivateKey) (r, s, v *big.Int, err error)

Sign signs any value using given private key. Function returns r, s, v representation of the signature where:

• r represents first coordinate of the ecdsa signature
• s represents second coordinate of the ecdsa signature
• v represents message signing ID, either 0 or 1 (23 or 24 with fitbitID)

func ToBytes

func ToBytes(r, s, v *big.Int) ([]byte, error)

ToBytes takes r, s, v signature format and converts it to the []byte format.

func ToBytesWithFitbitID

func ToBytesWithFitbitID(r, s, v *big.Int) ([]byte, error)

func Verify

func Verify(r, s, v *big.Int) error

Verify takes the r, s, v signature representation and verifies its correctness.

• r represents first coordinate of the ecdsa signature
• s represents second coordinate of the ecdsa signature
• v represents message signing ID, either 0 or 1 (23 or 24 with fitbitID)