Rell System Library/crypto/pubkey_to_xy

pubkey_to_xy

function pubkey_to_xy(pubkey: byte_array): (big_integer, big_integer)

Extract the x and y coordinates from an EC point public key. The extracted point is a tuple containing two big_integers, which are the x and y coordinates of the given public key, a point on the secp256k1 elliptic curve.

Inverse of crypto.xy_to_pubkey().

Accepts valid 33, 64 or 65 byte public keys. Note that not all byte arrays of acceptable length constitute valid public keys.

Return

the EC point x and y coordinates of the given public key

Since

0.13.5

Parameters

pubkey

the public key

Throws

exception

when

  • the given byte array does not have length 33, 64 or 65

  • the given byte array is not a valid public key