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AUTH.md

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commbank.eth account model

the client/ app currently just stores a menmonic created with

const accountSecret = ethers.Wallet.createRandom();

in passkey as commbank.eth.

the EVM address derived is the default returned from using this wallet as

const wallet = ethers.Wallet.fromPhase(accountSecret);

if a user can successfully sign up/in using passkey - they have an authToken in session storage. This auth token doesn't really have any power at the moment, as is much more of a placeholder for future features.

Private Transfers

for private transfers, the user has 2 public fields:

  • signing key: used for note passing (encryption and decryption)
  • owning key: used for proving of note ownership

These are 2 separate fields as proving ownership in zero knowledge is much more efficient using a different hash encryption pattern rather than encrypting and decrypting in zero knowledge.

The owning key is given by:

const owningKey = poseidon2(wallet.privateKey);

note: if you pass a wallet.privateKey > the field size for poseidon, poseidon2 should (TODO confirm) take the modulo for you

The signing key is given by:

const signingKey = wallet.publicKey;