Public key is a point (x, y) on a elliptic curve.
Compressed public keys have a prefix of 04.
Uncompressed public keys have a prefix of 02 or 03.
| Type | Prefix | Format |
|---|---|---|
| Uncompressed | 04 | 04xy |
Compressed and y is even | 02 | 02x |
Compressed and y is odd | 03 | 03x |
