ZCash Dart

Zcash cryptography, transactions, and zero-knowledge proofs — implemented in Dart.

zcash_dart is a low-level Dart library for building Zcash wallets, SDKs, and protocol-level applications.

It provides support for:

  • Transparent transactions
  • Sapling transactions
  • Orchard transactions
  • Zcash addresses and keys
  • Zero-knowledge proof infrastructure

Features

Transactions

Support for Zcash transaction handling:

  • Serialize and deserialize all supported Zcash transaction versions
  • Create, sign, and verify:
    • Orchard bundles
    • Sapling bundles
    • Transparent transactions
  • PCZT (Partially Constructed Zcash Transaction) support
  • Dart implementation of the Zcash Incremental Merkle Tree

Addresses & Keys

Support for Zcash key and address systems:

  • Sprout addresses
  • Sapling payment addresses
  • Transparent addresses:
    • P2PKH
    • P2SH
  • Unified Addresses
  • ZIP-32 hierarchical deterministic wallets
  • BIP-32 HD wallet support
  • USK (Unified Spending Key)
  • UFVK (Unified Full Viewing Key)
  • UIVK (Unified Incoming Viewing Key)

Zero-Knowledge Proofs

Support for Zcash zero-knowledge proof components:

  • Orchard proving system
  • Sapling proving system
  • PLONK / Groth16 proof support

Building ZK Provers

ZK proving code is located in the zk folder.

To compile ZK components for your target platform:

cd zk
cargo build --release [target]

Compile the prover for your required target:

  • Native platforms
  • WebAssembly (WASM)
  • Other supported targets

Cryptography

All Zcash-required cryptographic primitives are implemented in:

blockchain_utils

Supported primitives include:

  • FF1 format-preserving encryption
  • f4jumble
  • BLS12-381
  • Jubjub
  • Pallas / Vesta curves
  • Sinsemilla
  • Poseidon hash

Providers

Wallet integration support through:

  • walletd provider

Examples

See the example folder for usage examples.

Web Support

zcash_dart supports Dart Web.

Features:

  • Core cryptographic primitives are implemented in pure Dart
  • No native dependency is required for core cryptography
  • Compatible with Dart Web
  • Zero-knowledge components can be compiled to WebAssembly (WASM)

Performance Considerations

Zcash cryptography and zero-knowledge proof generation are computationally expensive in Dart Web.

For production web applications:

  • Compile heavy cryptographic operations to WASM
  • Avoid blocking the browser main thread

Contributing

Contributions are welcome.

  1. Fork the repository
  2. Create a feature branch
  3. Ensure tests pass
  4. Open a pull request with a clear description

Bug Reports & Feature Requests

Please use the GitHub Issues tab for:

  • Bug reports
  • Feature requests
  • Security concerns
  • Improvement suggestions

Libraries

zcash