Account

A zkopru account manages both of the layer-1 and layer-2 key pairs. First of all, the account has an Ethereum account from a randomly generated private key. This is used for interactions on the layer-1. Second, Zkopru wallet creates a Babyjubjub private key and public key set from the Ethereum account's private key. This Babyjubjub keyset is used for the EdDSA and encrypted memo field on the layer-2.

Key	Size	How to get	Where to use
Master seed	32 byte	Randomly generated	Recover keys
Ethereum private key	32 byte	Derived from master seed with BIP39	Layer1 ECDSA
Ethereum public address	20 byte	Derived from the private key	Layer 1 interactions
Babyjubjub private key	254 bit	Derived from Ethereum private key	Create EdDSA to spend UTXO
Babyjubjub public key	(254 bit, 254 bit)	Derived from Babyjubjub private key	Proving ownership of a UTXO