At first I assumed the two transaction models on Dusk were just a privacy toggle. Public or private. One switch. Simple choice.

The actual difference runs deeper than that.

Moonlight works like Ethereum. Your account has a nonce. Every transaction increments it publicly. Anyone can see your balance, your history, your sequence. The nonce is a counter. It is also a trail.

Phoenix works differently. There is no account. No visible balance. No sequential counter. Instead, when you spend a note, you produce a nullifier. The network records that nullifier and knows the note is gone. But it cannot link the nullifier back to the note it came from. The spending is provable. The identity of what was spent is not.

That distinction matters more than it sounds. In Moonlight, your transaction history is a readable story. In Phoenix, the network knows chapters are being written without knowing what they say.

What I keep thinking about is which institutions actually want which model. A bank processing a settlement might need Moonlight for audit trails. A fund executing a strategy might need Phoenix to avoid front-running. Both can live on the same chain. Neither forces the other to compromise.

What I cannot find in the documentation is how regulators treat nullifiers as evidence. A nonce proves sequence. A nullifier proves spending without revealing the note. Are those legally equivalent in a compliance context?

What do you think — when a regulator asks for proof of transaction, does a nullifier satisfy the requirement or does it just raise a harder question?

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