EIP-2645: Adding Hierachical Wallet For Layer-2 (#2645)
In the context of Computation Integrity Proof (CIP) Layer-2 solutions such as ZK-Rollups, users are required to sign messages on new elliptic curves optimized for those environnements. We leverage existing work on Key Derivation ([BIP32](https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki), [BIP39](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki) and [BIP44](https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki)) to define an efficient way to securely produce CIP L2s private keys, as well as creating domain separation between Layer-2 applications.
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