@opaquecash/opaque) and integrate stealth sends, PSR attestations, inbox scanning, and Groth16 proofs without touching chain-specific libraries directly.
Quickstart
Install the SDK, derive keys, and run your first flow in five minutes.
OpaqueClient reference
Full API for the unified client: stealth, PSR, reputation, and UAB.
Create a schema
Register a PSR schema and issue attestations on Ethereum or Solana.
Scan and sweep
Discover owned stealth outputs across chains and move funds to a fresh address.
What you can build
| Capability | Description |
|---|---|
| Stealth payments (CSAP) | EIP-5564 meta-addresses, one-time stealth destinations, on-chain announcements |
| Reputation (PSR) | Schema registry, stealth-bound attestations, Groth16 proofs without revealing identity |
| Cross-chain (UAB) | Relay announcements over Wormhole so payments on one chain appear in the other chain’s inbox |
Architecture at a glance
Supported networks (testnet)
| Chain | ID / cluster | Status |
|---|---|---|
| Ethereum Sepolia | 11155111 | Stealth, PSR V2, UAB, reputation verifier |
| Solana devnet | devnet | Stealth, PSR V2, reputation verifier |
OpaqueClient.create({ contracts: { ... } }).
Packages
Most apps only need@opaquecash/opaque (plus @opaquecash/react for React
apps). Contract addresses and program ids ship in the generated
@opaquecash/deployments registry. Lower-level packages (stealth-chain,
psr-core, uab, etc.) are re-exported when you need a narrow surface. See
Installation.