Crate privacy_cash 

Privacy Cash Rust SDK

A Rust SDK for interacting with Privacy Cash on Solana. Provides privacy-preserving deposit and withdrawal functionality using zero-knowledge proofs.

Features

• SOL Operations: Deposit and withdraw native SOL privately
• SPL Token Operations: Deposit and withdraw SPL tokens (USDC, USDT, etc.)
• Balance Queries: Check private balances without revealing identity
• UTXO Management: Automatic UTXO consolidation and caching

Example

use privacy_cash::PrivacyCash;
use solana_sdk::signature::Keypair;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Create client
    let keypair = Keypair::new();
    let client = PrivacyCash::new(
        "https://api.mainnet-beta.solana.com",
        keypair,
    )?;

    // Check private balance
    let balance = client.get_private_balance().await?;
    println!("Private balance: {} lamports", balance.lamports);

    // Deposit SOL
    let result = client.deposit(10_000_000).await?; // 0.01 SOL
    println!("Deposit tx: {}", result.signature);

    Ok(())
}

Re-exports

pub use client::PrivacyCash;

pub use config::Config;

pub use config::SupportedToken;

pub use error::PrivacyCashError;

pub use error::Result;

pub use keypair::ZkKeypair;

pub use utxo::Utxo;

pub use constants::*;

Modules

bridge

TypeScript Bridge for ZK proof generation

client

Main Privacy Cash client

config

Configuration fetching from the relayer API

constants

Constants used throughout the Privacy Cash SDK

deposit

Deposit functionality for native SOL

deposit_spl

Deposit functionality for SPL tokens

encryption

Encryption service for UTXO data

error

Error types for Privacy Cash SDK

get_utxos

UTXO fetching and management for native SOL

get_utxos_spl

UTXO fetching and management for SPL tokens

keypair

ZK Keypair for Privacy Cash

merkle_tree

Merkle tree implementation using Poseidon hashing

prover

ZK Proof generation for Privacy Cash

storage

Local storage for caching UTXOs and offsets

utils

Utility functions for Privacy Cash SDK

utxo

UTXO (Unspent Transaction Output) model for Privacy Cash

withdraw

Withdrawal functionality for native SOL

withdraw_spl

Withdrawal functionality for SPL tokens

Structs

Keypair

A vanilla Ed25519 key pair

Pubkey

The address of a Solana account.

Traits

Signer

The Signer trait declares operations that all digital signature providers must support. It is the primary interface by which signers are specified in Transaction signing interfaces