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updatedAt: 2026-03-17T16:01:36.000Z
agentTools:
  projectIndex: https://docs.bitso.com/juno/llms.txt
---

# MXNB on Arbitrum

## Overview

MXNB is an [Arbitrum-compatible](https://arbitrum.io/) stablecoin that follows the [ERC-20 standard](https://ethereum.org/en/developers/docs/standards/tokens/erc-20/), maintaining a 1:1 peg to the Mexican peso.

Using the ERC-20 standard for issuing the MXNB stablecoin smart contract enhances its trustworthiness and compatibility across multiple wallets and protocols, promoting liquidity and interoperability. The standard’s well-established codebase strengthens security, while its predefined functions simplify development.

## Smart Contracts and Architecture

The MXNB stablecoin uses a [proxy upgrade pattern](https://docs.openzeppelin.com/upgrades-plugins/proxies), separating the token’s logic and data into distinct contracts. This approach enables seamless updates while preserving security.

Key contracts for developers seeking to use the MXNB token:

* **ERC-20 Implementation Contract:** Contains the core business logic for the MXNB token, and it is the initial contract deployed on the Arbitrum blockchain.
* **Proxy Contract:** Serves as an interface to the implementation contract. It holds the address of the implementation contract, delegating calls to it without containing business logic.

Developers should use the **Proxy Contract Address** for all interactions with the MXNB stablecoin.

## Networks

MXNB is deployed on two distinct networks:

### 1. **Arbitrum One Mainnet**

The Mainnet, short for main network, is the primary and live blockchain where transactions hold real-world value. It is production-ready and incurs transaction fees.

**Mainnet Details:**

* **Network Name:** Arbitrum One Mainnet
* **Token Standard:** ERC-20
* **Decimal Precision:** 6
* **Fiat Token Implementation Address:** [0x72beddf7032EEC58F199857b79A8e37020c14e42](https://arbiscan.io/address/0x72beddf7032EEC58F199857b79A8e37020c14e42)
* **Proxy Contract Address:** [0xF197FFC28c23E0309B5559e7a166f2c6164C80aA](https://arbiscan.io/address/0xf197ffc28c23e0309b5559e7a166f2c6164c80aa)

### 2. **Arbitrum Sepolia Testnet**

The Testnet, short for test network, mirrors Mainnet functionality but without real-world value, providing a safe and cost-free environment for experimentation, development, and testing.

**Testnet Details:**

* **Network Name:** Arbitrum Sepolia Testnet
* **Token Standard:** ERC-20
* **Decimal Precision:** 6
* **Fiat Token Implementation Address:** [0xb56E3E3769EfB85214Cb4fA42eBA198E9FDA92bf](https://sepolia.arbiscan.io/address/0xb56E3E3769EfB85214Cb4fA42eBA198E9FDA92bf)
* **Proxy Contract Address:** [0x82B9e52b26A2954E113F94Ff26647754d5a4247D](https://sepolia.arbiscan.io/address/0x82B9e52b26A2954E113F94Ff26647754d5a4247D)

## Key Benefits of MXNB on Arbitrum

* **Scalability:** Arbitrum's layer-2 solution provides high throughput and reduced transaction costs
* **Interoperability:** The ERC-20 standard enables seamless integration with a wide range of DeFi applications and services.
* **Upgradability:** The proxy upgrade pattern guarantees future improvements without disrupting existing users.
* **Developer-Friendly:** The dedicated testnet deployment facilitates safe testing and iteration.