Learn how to bridge native AVAX from Fuji to become native gas tokens on your L1.

Native to Native Token Bridge

In this section, you'll learn how to bridge native AVAX from Fuji C-Chain to your own L1, where it becomes the native gas token.

Use Case

This bridge type is ideal when:

You want to use AVAX as your chain's gas currency
You're building a chain that's part of the Avalanche ecosystem
You need shared security via AVAX staking value

Architecture Overview

Source Chain (Fuji C-Chain)                 Destination Chain (Your L1)
┌──────────────────────────────┐           ┌──────────────────────────────┐
│                              │           │                              │
│  AVAX (Native) → WAVAX       │           │  Native Token (minted AVAX)  │
│       ↓                      │           │       ↑                      │
│  NativeTokenHome  ───────────│───────────│  NativeTokenRemote           │
│  (wraps & locks AVAX)        │    ICM    │  (calls Native Minter)       │
│                              │           │                              │
└──────────────────────────────┘           └──────────────────────────────┘

Contracts Involved

Contract	Chain	Purpose
NativeTokenHome	Fuji C-Chain	Wraps AVAX to WAVAX, locks when bridging out, releases when bridging back
NativeTokenRemote	Your L1	Calls Native Minter to create native tokens
Native Minter Precompile	Your L1	System contract that mints native tokens
WAVAX	Fuji C-Chain	ERC-20 wrapper for native AVAX

Key Difference from Chapter 1

	ERC-20 → Native (Chapter 1)	Native → Native (Chapter 2)
Source Token	USDC (ERC-20)	AVAX (Native)
Home Contract	ERC20TokenHome	NativeTokenHome
Wrapping	Not needed	AVAX wraps to WAVAX
Use Case	Stablecoin gas token	AVAX-based ecosystem

WAVAX (Wrapped AVAX)

Since native AVAX isn't an ERC-20 token, NativeTokenHome uses WAVAX internally:

User sends AVAX to NativeTokenHome
Contract wraps AVAX to WAVAX
WAVAX is locked in the contract
Bridge message is sent via ICM
On your L1, native tokens are minted

Fuji C-Chain already has a deployed WAVAX contract. The toolbox will automatically detect and use it.

Key Requirement: Native Minter Precompile

Your L1 must have the Native Minter precompile enabled. This precompile:

Is a built-in Avalanche L1 feature
Allows authorized contracts to mint native tokens
Must be configured in the chain's genesis
Address: 0x0200000000000000000000000000000000000001

Important: You'll create an L1 with Native Minter enabled as the first step of this chapter.

Deployment Flow

Here's what we'll build:

Step	Action	Chain
1	Create L1 with Native Minter	Fuji (P-Chain)
2	Set up relayer	Local (Docker)
3	Deploy NativeTokenHome	Fuji C-Chain
4	Deploy NativeTokenRemote	Your L1
5	Register + Collateralize	Your L1 → Fuji
6	Bridge AVAX → Native	Fuji → Your L1

What You'll Achieve

By the end of this section:

Your L1 uses AVAX as the native gas token
Users can bridge AVAX from Fuji to get native tokens for gas
The bridge is fully collateralized and secure

Token Backing: Every native token minted on your L1 is backed 1:1 by WAVAX (wrapped AVAX) locked in the NativeTokenHome contract on Fuji.

Let's get started by creating your L1!

Introduction