Privacy Intents - ArcPay Somnia

Somnia does not currently ship a native treasury privacy layer. ArcPay adds a builder-usable privacy intent contract for agent payment workflows.

Privacy Boundary

This is not a full ZK mixer. It provides application-level privacy:

commitment IDs instead of plain business IDs
encrypted memo URI instead of public invoice or contractor metadata
recipient hidden until release
one-time nullifier release
cancellation and refund while unreleased
on-chain release evidence for audits

Solidity Interface

function createNativeIntent(bytes32 commitment, string calldata encryptedMemoUri) external payable;
function createTokenIntent(bytes32 commitment, address token, uint256 amount, string calldata encryptedMemoUri) external;
function releaseIntent(bytes32 commitment, bytes32 nullifier, address payable recipient) external;
function cancelIntent(bytes32 commitment) external;

Developer Flow

const commitment = keccak256(toUtf8Bytes("invoice-42-secret"));
const nullifier = keccak256(toUtf8Bytes("release-secret-42"));

await privacyVault.createNativeIntent(
  commitment,
  "encrypted://memo-or-ipfs-pointer",
  { value: parseEther("0.01") },
);

await privacyVault.releaseIntent(commitment, nullifier, recipient);

Helpers

npm run arcpay -- privacy-commit "invoice-42-secret"
npm run arcpay -- privacy-guide
npm run arcpay -- privacy-abi

Product Screen

ArcPay privacy intents dashboard