Zeto_NfAnonNullifier

Anonymity	History Masking	Encryption	KYC	Non-repudiation	Gas Cost (estimate)
		-	-	-	1,450,258

This implements a non-fungible token using nullifiers, thus hiding the spending graph.

The statements in the proof include:

• the output UTXO hashes are based on the same id, uri as the input UTXO hashes
• the sender possesses the private BabyJubjub key, whose public key is part of the pre-image of the input commitment hashes, which match the corresponding nullifiers
• the nullifiers represent input commitments that are included in a Sparse Merkle Tree represented by the root hash