eckey

const (
	// PublicCompressedSize defines the number of bytes used to represent a
	// compressed public key.  This consists of a one byte header and the X
	// coordinate of the uncompressed public key.  Each X coordinate maps to
	// exactly two Y coordinates, the header byte is then used to select the even
	// or odd component.
	CompressedPublicSize = 1 + CoordinateSize

	// HeaderCompressedEven defines the header byte of a compressed public key
	// indicating that the even Y coordinate should be chosen upon decompression.
	HeaderCompressedEven byte = 0x02

	// HeaderCompressedOdd defines the header byte of a compressed public key
	// indicating that the odd Y coordinate should be chosen upon decompression.
	HeaderCompressedOdd byte = 0x03
)

const (
	// CoordinateSize defines the number of bytes required to store the X or Y
	// coordinate of an secp256k1 point.
	CoordinateSize = 32

	// PublicSize defines the number of bytes used to represent a public key,
	// which consists of an (X, Y) coordinate pair.
	PublicSize = 2 * CoordinateSize
)

const (
	// EntropySize defines the number of bytes used to generate a secret key.
	EntropySize = 32

	// SecretSize defines the number of bytes used to represent a secret key,
	// which is interpreted as a positive scalar coefficient.
	SecretSize = 32
)