feat(wallet): iOS Zcash account creation and balance fetching

[nuo-xu]

Resolves brave/brave-browser#45445

Test Plan

1. Zcash feature flag can be enabled via brave://flags
2. Zcash testnet flag is the same as BTC testnet flag exists in debug settings (However, testnet is not recommended to be used for testing since core didn't find a stable endpoint for it)
3. Should be able to create Zcash account both test and mainnet via Accounts tab or by picking Zcash network as selected network while there is no zcash account has been created.
4. Please contact me or @cypt4 for some ZEC testing balance fetching
5. Once you have ZEC balance, please check if entire wallet displays it correctly: Portfolio/Asset Detail/Accounts/Account Detail
6. Zcash account has balance will not be auto-restored since it is not yet implemented in core.
7. Zcash send tx will be handled in a different issue [Wallet/iOS]: Zcash Transparent Account Send Tx brave-browser#45446

[nuo-xu]

@stoletheminerals i didn't create a sec-review for this since it's UI changes + using Wallet Core mojom api. Please let me know if it needs one. Adding you as a reviewer in case you need to go through the changes.

[stoletheminerals]

Thanks @nuo-xu . If you don't mind please create a review issue and add a priority, as I have a few other big reviews in the pipeline.

[github-actions]

Chromium major version is behind target branch (135.0.7049.84 vs 136.0.7103.25). Please rebase.

[StephenHeaps]

Just need to select Preserve Vector Data for the svg images, otherwise LGTM 🐎.

[github-actions]

Chromium major version is behind target branch (136.0.7103.93 vs 137.0.7151.16). Please rebase.

[github-actions]

[puLL-Merge] - brave/brave-core@28671

Description

This PR adds ZCash wallet support to the Brave iOS app. It integrates ZCash functionality alongside existing cryptocurrencies like Bitcoin and Ethereum by adding ZCash account management, asset display, and transaction capabilities. The changes include UI updates, new asset icons, and support for both mainnet and testnet ZCash networks.

Changes

Changes

Wallet Service Integration

• Added ZCash wallet service integration in BVC+Wallet.swift by initializing zcashWalletService and passing it through to wallet stores
• Added a testnet toggle for ZCash in the debug menu, similar to the existing Bitcoin testnet toggle

Asset Icons

• Added ZCash asset icon and updated several existing cryptocurrency icons (Bitcoin, ETH, AVAX, etc.) to use SVG format instead of PNG for better scaling
• Added new asset icons for Base and Neon networks

Account Management

• Extended account management functionality to support ZCash accounts, including:
  • Account creation
  • Transparent address display
  • Balance fetching
  • ZCash testnet support

Account Operations

• Added support for receiving ZCash (deposit functionality)
• Modified CopyAddressHeader to work with ZCash addresses
• Added account export limitations for ZCash (doesn't support private key export)

UI/UX Updates

• Updated transaction support for ZCash
• Modified account display logic to handle ZCash addresses properly
• Extended filters to include ZCash in relevant views

Model Extensions

• Extended AccountInfo with helpers like supportsAccountExport and supportsNFT
• Added ZCash-specific extensions for balance fetching and address handling

Preferences

• Added isZcashTestnetEnabled preference for controlling ZCash testnet visibility

sequenceDiagram
    BrowserViewController->>WalletStore: Initialize
    WalletStore->>ZCashWalletServiceFactory: get(privateMode:)
    ZCashWalletServiceFactory-->>WalletStore: Returns zcashWalletService
    WalletStore->>CryptoStore: Initialize with zcashWalletService
    CryptoStore->>AccountsStore: Initialize with zcashWalletService
    CryptoStore->>BuyTokenStore: Initialize with zcashWalletService
    CryptoStore->>SendTokenStore: Initialize with zcashWalletService
    CryptoStore->>AssetDetailStore: Initialize with zcashWalletService
    CryptoStore->>AccountActivityStore: Initialize with zcashWalletService
    CryptoStore->>PortfolioStore: Initialize with zcashWalletService
    
    User->>BraveWalletDebugMenu: Toggle "Enable Zcash Testnet"
    BraveWalletDebugMenu->>Preferences: Update isZcashTestnetEnabled
    
    User->>AddAccountView: Create ZCash Account
    AddAccountView->>KeyringStore: Create Account
    KeyringStore->>ZCashWalletService: Initialize account
    
    User->>AccountActivityView: View ZCash Account
    AccountActivityView->>ZCashWalletService: fetchZECTransparentBalances
    ZCashWalletService-->>AccountActivityView: Return balance
    
    User->>DepositTokenView: Get deposit address
    DepositTokenView->>ZCashWalletService: zCashAccountInfo
    ZCashWalletService-->>DepositTokenView: Returns nextTransparentReceiveAddress

Loading

[brave-builds]

Released in v1.81.12