# ARQL

> A CCTP-shaped lock-and-mint path that locks native Circle USDC on Arc Testnet and mints a 6-decimal QRC-20 USD Coin on QRL 2.0, with Hyperion contracts, an Iris-style attester API, and a public settlement desk.

- Canonical page: [ARQL](https://www.qrlecosystem.com/projects/arql/)
- Status: Beta · Testnet
- Type: Protocols (`protocol`)
- Primary category: Interoperability, messaging & data (`interoperability-messaging-data`)
- Secondary categories: Finance, Assets & tokenization
- Capabilities: Payments, Faucets
- QRL relationship: Native
- QRL support: QRL 2.0 (testnet)
- Publisher: [pq-cybarg](https://www.qrlecosystem.com/publishers/pq-cybarg/index.html.md)
- Source availability: Full
- Listed: 2026-09-02
- Data updated: 2026-09-02
- Last verified: 2026-09-02
- Search keywords: usdc, qrc20, bridge, hyperion, cctp

## Project links

- [Website](https://github.com/pq-cybarg/arql)
- [Documentation](https://github.com/pq-cybarg/arql/blob/main/docs/architecture.md)


## Clients

- [Web](https://pq-cybarg.github.io/arql/) — default


## Repositories

- [Contracts repository](https://github.com/pq-cybarg/arql) — license: NOASSERTION


## Overview

ARQL is a CCTP-shaped bridge that locks native Circle USDC on Arc Testnet
and mints a 6-decimal QRC-20 named USD Coin on QRL 2.0. QRL is not a Circle
CCTP domain, so ARQL does not call Circle TokenMessengerV2 toward QRL.

Arc-side contracts lock official native USDC. QRVM-side contracts are
Hyperion and mint or burn the QRC-20. Arc attestation uses SLH-DSA-SHA2-128s;
QRL receive uses ML-DSA-87 `msg.sender`. A public static desk is published at
pq-cybarg.github.io/arql. Current Testnet V2 deployments use 20-byte Q
addresses; the repository documents a later 64-byte address reset.

This listing is informational and is not an endorsement, audit, or claim
that the token is Circle-issued native USDC on QRL.

## Features

- Locks official Arc native USDC; does not mint a second USDC on Arc
- Hyperion QRC-20 USD Coin (6 decimals) on QRL 2.0 Testnet V2
- SLH-DSA attestation on Arc and ML-DSA-87 attester on QRVM
- Public settlement desk and Iris-shaped /v2 message API


## Deployments

- **QRL 2.0 Testnet V2** — Live; source verification: Unverified
  - Token (qrc20-usdc): `Qadf94bb6e061a9f3b1d54826241eba701d43fb86`
  - Contract (minter): `Q89b8cdf9bddba27ac48938bd82d99f33796bcc05`
  - Contract (sealed-bridge): `Q360b826e5290ae8ebb0b58318c12085cb37d9dd8`
  - [Deployment evidence](https://github.com/pq-cybarg/arql/blob/main/deployments/qrl-testnet.json)
  - [Deployment evidence](https://zondscan.com/address/Qadf94bb6e061a9f3b1d54826241eba701d43fb86)


## Assets

- **USD Coin** — Token (`USDC`); deployment: `qrl-2-testnet-v2`; identifier: `Qadf94bb6e061a9f3b1d54826241eba701d43fb86`; [evidence](https://zondscan.com/address/Qadf94bb6e061a9f3b1d54826241eba701d43fb86)


## Evidence references

These submitted references provide context and do not create a trust or ownership label.

- [Deployment evidence](https://zondscan.com/address/Qadf94bb6e061a9f3b1d54826241eba701d43fb86) — checked 2026-09-02. QRC-20 USDC on QRL 2.0 Testnet V2
- [Qrl Relationship evidence](https://github.com/pq-cybarg/arql/blob/main/docs/architecture.md) — checked 2026-09-02. Public architecture documenting the QRVM Hyperion lock-and-mint path