@frontiercompute/zap1

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ZAP1 Merkle proof verification for JavaScript and TypeScript. WASM-powered BLAKE2b-256 with ZAP1 domain-separated personalizations.

Client-side verification of on-chain commitments. All cryptography runs in WebAssembly compiled from the zap1-verify Rust crate.

Install

npm install @frontiercompute/zap1

Usage

Verify a proof bundle

import { verifyProof, parseBundle } from "@frontiercompute/zap1";

const res = await fetch("https://pay.frontiercompute.io/verify/075b00df.../proof.json");
const raw = await res.json();
const bundle = parseBundle(raw);

const valid = await verifyProof(bundle);
console.log(valid ? "VERIFIED" : "FAILED");

Compute a leaf hash

import { computeLeafHash } from "@frontiercompute/zap1";

const hash = await computeLeafHash("PROGRAM_ENTRY", {
  walletHash: "e2e_wallet_20260327",
});
// "075b00df286038a7b3f6bb70054df61343e3481fba579591354a00214e9e019b"

Node hash (Merkle tree)

import { nodeHash } from "@frontiercompute/zap1";

const parent = await nodeHash(leftHex, rightHex);
// BLAKE2b-256 with "NordicShield_MRK" personalization

API

| Function | Description | |----------|-------------| | init() | Preload the WASM module (called automatically on first use) | | computeLeafHash(type, payload) | Compute leaf hash for PROGRAM_ENTRY or OWNERSHIP_ATTEST | | verifyProof(bundle) | Verify a Merkle inclusion proof | | nodeHash(left, right) | Compute a Merkle node hash | | parseBundle(json) | Parse and normalize an API proof bundle | | EVENT_TYPES | Array of all 18 ZAP1 event types |

Personalizations (protocol constants)

| Context | Value (16 bytes) | |---------|-----------------| | Leaf hash | NordicShield_\x00\x00\x00 | | Node hash | NordicShield_MRK |

Protocol

See ONCHAIN_PROTOCOL.md for the full ZAP1 specification.

Related Packages

| Package | What it does | |---------|-------------| | @frontiercompute/zcash-ika | Zcash + Bitcoin signing via Ika 2PC-MPC | | @frontiercompute/zcash-mcp | MCP server for Zcash (22 tools) | | @frontiercompute/openclaw-zap1 | OpenClaw skill for ZAP1 attestation | | @frontiercompute/silo-zap1 | Silo agent attestation via ZAP1 |

License

MIT