WIF = base58 encode [extended private key][checksum]
extended private key = [version][private key][01 if public keys are compressed]
version = 80 for mainet, EF for testnet
checksum = first 4 bytes of SHA256(SHA256(extended private key))
| Type | Hex |
|---|---|
| Mainnet | 80 |
| Testnet | EF |