docs: zeto change-log update

[SaeeDawod]

Summary by Sourcery

Introduce the Zeto Smart Contract Set, a new collection of zero-knowledge ERC20 and ERC721 token contracts. It includes fungible and non-fungible token types with varying privacy and compliance features, zero-knowledge DVP functionality, and subgraph integration. The set also provides tools for testing, deployment, and trusted setup.

New Features:

• Add the Zeto Smart Contract Set, providing zero-knowledge token capabilities.

Documentation:

• Document the Zeto Smart Contract Set, including its features, token types, and usage instructions.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces documentation for the Zeto Smart Contract Set, a new set of zero-knowledge-based tokens on the SettleMint platform. It details the various fungible and non-fungible token types, zero-knowledge DVP capabilities, testing and deployment procedures, subgraph integration, and links to the open-source repository.

Class diagram for Zeto Smart Contract token hierarchy

classDiagram
    class Zeto_Base {
        <<abstract>>
        +transfer()
        +balanceOf()
    }
    class Zeto_Anon {
        +anonymousTransfer()
    }
    class Zeto_AnonEnc {
        +encryptedTransfer()
        -encryptData()
    }
    class Zeto_AnonNullifier {
        +nullifierBasedTransfer()
        -checkDoubleSpend()
    }
    class Zeto_AnonNullifierKyc {
        +kycTransfer()
        -verifyIdentity()
    }
    class Zeto_AnonEncNullifier {
        +encryptedNullifierTransfer()
        -validateNullifier()
    }
    class Zeto_AnonEncNullifierKyc {
        +compliantEncryptedTransfer()
        -validateKYC()
    }
    class Zeto_NfAnon {
        +anonymousNFTTransfer()
        +ownerOf()
    }
    class Zeto_NfAnonNullifier {
        +nullifierNFTTransfer()
        -trackOwnership()
    }
    Zeto_Base <|-- Zeto_Anon
    Zeto_Base <|-- Zeto_AnonEnc
    Zeto_Base <|-- Zeto_AnonNullifier
    Zeto_AnonNullifier <|-- Zeto_AnonNullifierKyc
    Zeto_Base <|-- Zeto_AnonEncNullifier
    Zeto_AnonEncNullifier <|-- Zeto_AnonEncNullifierKyc
    Zeto_Base <|-- Zeto_NfAnon
    Zeto_NfAnon <|-- Zeto_NfAnonNullifier
    note for Zeto_Base "Base contract for all Zeto tokens"
    note for Zeto_AnonEncNullifierKyc "Most comprehensive token with all privacy features"

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File-Level Changes

Change	Details	Files
Added documentation for Zeto Smart Contract Set	Documented the different fungible and non-fungible token types offered by Zeto. Described the zero-knowledge DVP (Delivery vs Payment) feature. Provided instructions for testing, deployment, and trusted setup. Included details about subgraph integration. Added a link to the open-source Zeto smart contracts repository on GitHub.	releases/2025-01-03-zeto-smart-contract-set.md

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[sourcery-ai]

Hey @SaeeDawod - I've reviewed your changes - here's some feedback:

Overall Comments:

• Please add information about security assumptions, cryptographic primitives used, and audit status of the contracts. This is crucial for zero-knowledge implementations.
• The linked repository appears to be private. Please either make it public or provide alternative documentation access instructions.

Here's what I looked at during the review

• 🟡 General issues: 3 issues found
• 🟢 Security: all looks good
• 🟢 Review instructions: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

---

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[sourcery-ai]

suggestion (typo): Use "KYC" instead of "Kyc" for consistency.

It's generally recommended to use all caps for acronyms like KYC (Know Your Customer).

Suggested implementation:

4. **Zeto_AnonNullifierKYC** 

6. **Zeto_AnonEncNullifierKYC** 

Note: If this contract name is referenced elsewhere in the codebase (like in actual smart contract files, tests, or documentation), those references will also need to be updated to match this new capitalization.

[sourcery-ai]

suggestion (typo): Use "KYC" instead of "Kyc" for consistency.

It's generally recommended to use all caps for acronyms like KYC (Know Your Customer).

Suggested implementation:

4. **Zeto_AnonNullifierKYC** 

6. **Zeto_AnonEncNullifierKYC** 

[sourcery-ai]

suggestion (typo): Use "KYC" instead of "Kyc" for consistency.

It's generally recommended to use all caps for acronyms like KYC (Know Your Customer).

Suggested implementation:

4. **Zeto_AnonNullifierKYC** 

6. **Zeto_AnonEncNullifierKYC** 

[snigdha920]

Should we use full sentences for the points? I'm wondering if this is too concise and feels like a rough sheet Eg. this can be

## Subgraph Integration
This smart contract sets includes fully pre-configured subgraph templates for all contracts.