What Is Avalanche (AVAX) and How Does It Work?

What Is Avalanche (AVAX)?

Avalanche is a proof-of-stake blockchain platform for smart contracts, digital assets, and separate blockchain networks. These networks are called Avalanche L1s and can have their own rules for validators and tokenomics, among other things. The Avalanche mainnet went live in September 2020.

AVAX is the native utility token of the Avalanche Network. AVAX is used, among other things, for transaction fees and to help secure the Primary Network through staking.

The Primary Network is the foundation of the Avalanche network and consists of three blockchains, each with its own role:

• P-Chain (Platform Chain): handles validators, staking, and Avalanche L1s, among other things.
• C-Chain (Contract Chain): is EVM-compatible and is used for smart contracts and decentralized applications.
• X-Chain (Exchange Chain): is meant for creating and transferring digital assets.

Because of this, staking, smart contracts, and native assets are not all handled on the same blockchain.

Key Takeaways

• Avalanche is a proof-of-stake platform for smart contracts, digital assets, and Avalanche L1s.
• AVAX is the native token for fees and staking on the Primary Network.
• The Primary Network consists of the P-Chain, C-Chain, and X-Chain.
• Consensus works through stake-weighted, random polling between validators.
• Avalanche L1s can choose their own validators, tokens, fees, and rules.

How Does Avalanche Work?

Avalanche splits important functions across three blockchains within the Primary Network. Validators are participants who stake AVAX and help process and verify blocks and transactions. Validators on the Primary Network validate all three chains: the P-Chain, C-Chain, and X-Chain.

The P-Chain handles staking, validators, and the management of Avalanche L1s, among other things. Staking here means locking up AVAX to participate as a validator in the Primary Network.

The C-Chain is meant for smart contracts and decentralized applications. This chain is EVM-compatible. That means Solidity smart contracts and many tools from the Ethereum ecosystem can also be used on the C-Chain.

The X-Chain supports the issuance and transfer of native Avalanche assets. These are digital assets that can be created and sent directly within Avalanche.

Each chain uses its own virtual machine. In short, a virtual machine determines which transactions are valid, how the state of a blockchain changes after a transaction, and which functions the chain supports.

For example, the C-Chain uses Coreth, an implementation of the Ethereum Virtual Machine. The P-Chain uses PlatformVM, and the X-Chain uses AvalancheVM.

For consensus, Avalanche uses the Snowman consensus family. Snowman is designed for blockchains where blocks are placed one after another in a single fixed order.

On the Primary Network, Snowman++ is used. Snowman++ builds on Snowman and adds rules that determine which validator is allowed to propose a new block at a given moment. This system is used on the P-Chain, C-Chain, and X-Chain.

Avalanche (AVAX) Overview

What Are Avalanche L1s?

An Avalanche L1 is an independent network within the Avalanche ecosystem. Such an L1 can set its own rules for things like validators, transaction fees, and token economics.

An L1 can validate one or more blockchains. The reverse is also true: each blockchain is validated by exactly one Avalanche L1. This allows each L1 to form its own environment with its own rules and applications.

An Avalanche L1 can choose its own virtual machine, native token, transaction fees, validator management, and security model. For example, an L1 can use permissionless proof-of-stake, where participants can become validators freely under certain conditions, but it can also use a permissioned model where only approved validators are allowed to participate.

Since the Etna upgrade, validators of an Avalanche L1 no longer have to validate the Primary Network as well. However, L1 validators do need to synchronize the P-Chain. The P-Chain keeps track of information about the different validator sets within Avalanche, among other things.

For communication between different Avalanche L1s, Avalanche Warp Messaging can be used. This is a built-in system that lets different L1s send and verify messages to each other.

It is important to note that an Avalanche L1 does not automatically have the same validators or economic security as the Primary Network. Each L1 largely decides for itself how its validator set and security are set up.

The performance of different L1s is also separated from each other. So a lot of activity on one Avalanche L1 does not have to cause delays on another L1 right away.

Examples of Avalanche L1s

There are different L1s within the Avalanche ecosystem that are built for different use cases. Some examples are:

• Gunzilla: an Avalanche L1 developed for Gunzilla Games' gaming ecosystem. The network can be used for blockchain features in games, such as digital assets and transactions.

• DeFi Kingdoms: uses its own Avalanche L1 for its blockchain game and the economy around it. This lets game transactions be processed on a separate network.

• Dexalot: an Avalanche L1 for Dexalot's decentralized trading environment. By using its own network, the platform can set up its blockchain specifically for trading.

• Beam: an Avalanche L1 focused on gaming and blockchain applications for games.

• FIFA: has its own Avalanche L1 where blockchain applications and digital collectibles can be built within the FIFA ecosystem.

• Dinari Financial Network: an Avalanche L1 focused on financial applications and tokenized assets.

These examples show that Avalanche L1s are not all built for the same purpose. A developer or organization can launch its own network and adjust the rules to fit gaming, trading, or financial applications, for example.

How Does Consensus Work on the Avalanche Network?

Consensus is the way a network agrees on which transactions and blocks are valid. Avalanche uses the Snow consensus family for this, including Snowball and Snowman.

Instead of every validator communicating with all other validators for every decision, a validator repeatedly asks a small, randomly chosen group of other validators for their preference.

The chance that a validator gets selected for such a poll depends on the amount of AVAX the validator has staked on the Primary Network. Validators with more stake therefore have a greater chance of being included in a sample.

Suppose a validator has to decide which block is preferred. The validator asks a group of other validators for their preference. If enough validators give the same answer, the validator adopts that preference. This process is repeated multiple times.

With the default settings, 20 validators are polled per round. 15 votes are needed for enough agreement. After 20 consecutive successful rounds, the decision can be accepted.

Snowman applies this principle to a linear blockchain, where blocks are placed one after another in a single fixed order. Snowman is used on the P-Chain, C-Chain, and X-Chain, and it also forms the basis for many Avalanche L1s.

The security of this consensus model is probabilistic. That means the chance of conflicting accepted blocks depends on the chosen consensus settings and the assumptions about the validators. With the default settings, that chance is made very small.

What Role Does AVAX Play in Avalanche?

AVAX has several functions within the Avalanche Primary Network.

First, AVAX is used for transaction fees. On the C-Chain, for example, you pay gas in AVAX to execute transactions and smart contracts.

Transaction fees on the Primary Network are burned. That means the AVAX used is permanently removed from circulation.

AVAX is also used for staking. Anyone who wants to become an independent validator on the Primary Network must stake at least 2,000 AVAX.

AVAX holders who do not want to run a validator themselves can delegate their AVAX to an existing validator. The minimum for this is 25 AVAX.

The more AVAX a validator has staked, the greater that validator's relative weight in consensus polls on the Primary Network.

A validator only receives a staking reward if it is sufficiently correct and reachable during the validation period. For validator periods that started on or after the Helicon upgrade on September 22, 2026, a minimum uptime of 90% is required to qualify for a reward.

Slashing is not used on the Primary Network. With slashing, part of the staked tokens could be taken away as a penalty. So if a validator does not meet the conditions for a reward, Avalanche does not automatically take away the staked AVAX, but the validator can miss out on its staking reward.

Avalanche L1s can use their own rules for validators, fees, and tokens. So an Avalanche L1 does not have to use the same staking or token model as the Primary Network.

Avalanche vs. Other Blockchains

Avalanche differs from other well-known Layer 1 blockchains like Ethereum, Solana, and Cardano in several ways. One important difference is how the network is structured.

Avalanche vs. Ethereum

Ethereum has one main network where smart contracts and transactions are executed. For extra scalability, the ecosystem also makes heavy use of Layer 2 networks.

Avalanche is set up differently. The Avalanche Primary Network already consists of three specialized chains:

• the P-Chain for validators, staking, and managing Avalanche L1s;
• the C-Chain for EVM smart contracts;
• the X-Chain for creating and transferring native Avalanche assets.

In addition, independent Avalanche L1s can be built within Avalanche. Such an L1 can use its own validators, token rules, transaction fees, and virtual machine.

The C-Chain is technically the most similar to Ethereum because it supports the Ethereum Virtual Machine. That means developers can use Solidity smart contracts and many existing Ethereum tools.

The consensus process is also different. Ethereum uses Proof of Stake, where validators propose blocks and other validators vote on them. For finality, votes representing at least two-thirds of the staked ETH must confirm checkpoints.

Avalanche uses Snowman consensus. In this system, validators repeatedly ask a small, randomly chosen group of other validators for their preference. This means not every validator has to communicate directly with all other validators for every decision.

Avalanche vs. Solana

Solana is also a fast Layer 1 for smart contracts, but its architecture is very different from Avalanche's.

On Solana, applications basically run on the same Layer 1 and share the network's capacity and infrastructure. Avalanche, on the other hand, makes it possible to set up separate Avalanche L1s with their own validators and rules.

Example: A game that uses its own L1 on Avalanche can choose its own validator group and its own transaction fee rules. An application that runs directly on Solana uses Solana's rules and validators.

Transaction execution is different too. Solana is designed to process transactions that use different parts of the blockchain in parallel as much as possible. Avalanche spreads scalability across different chains and independent L1s, among other things.

So the networks take different approaches: Solana tries to handle a lot of activity on one fast shared Layer 1, while Avalanche also makes multiple independent L1s possible.

Avalanche vs. Cardano

Cardano uses Proof of Stake too, but its consensus mechanism works differently.

Cardano uses Ouroboros. Time is divided into epochs and slots. For each slot, a stake pool can be chosen to produce a new block. The chance of being selected depends on the amount of ADA assigned to a stake pool.

Avalanche does not use a similar system where consensus is mainly built around consecutive slot leaders. With Snowman, validators repeatedly ask randomly selected validators for their preference until enough certainty about a decision is reached.

The network architecture is different too. Cardano has one primary Layer 1 where ADA, staking, and smart contract functionality come together. Avalanche splits functions across the P-, C-, and X-Chain within the Primary Network and also makes independent Avalanche L1s possible.

There is also a practical difference when it comes to staking. ADA holders can delegate their ADA to a stake pool without locking it up, and the ADA can still be spent. On Avalanche, AVAX is locked for a certain staking period when you validate or delegate.

Key Differences at a Glance

So the biggest difference is that Avalanche is not just trying to scale one blockchain. The network is designed as an ecosystem where multiple independent Avalanche L1s can exist alongside the Primary Network. Each L1 can make its own choices for things like validators, fees, tokens, and execution.

Because of that, decentralization, costs, performance, and security can differ from one Avalanche L1 to another. The properties of the Primary Network do not automatically apply to every L1 built within the Avalanche ecosystem.

Who Founded Avalanche?

Avalanche was founded by Emin Gün Sirer, Kevin Sekniqi, and Maofan "Ted" Yin. They were involved with Ava Labs, the company that develops important software for the Avalanche network.

The consensus family behind Avalanche was initially described by a pseudonymous group under the name Team Rocket. Later, academic research on these consensus mechanisms was published with Maofan Yin, Kevin Sekniqi, Robbert van Renesse, and Emin Gün Sirer among the authors.

So Robbert van Renesse contributed to the research on the consensus, but is not considered a founder of Avalanche.

What Are the Benefits of Avalanche?

Avalanche has a number of technical features that can matter to users and developers:

• EVM compatibility on the C-Chain: Smart contracts in Solidity and many existing Ethereum tools can be used on the C-Chain.

• Efficient consensus: With Snow consensus, validators repeatedly ask a small group of other validators for their preference. That means not every validator has to communicate directly with all other validators for every decision.

• A lot of freedom for Avalanche L1s: An L1 can use its own validator rules, execution logic, transaction fees, and native tokens.

• Performance isolation between L1s: A lot of activity on one Avalanche L1 does not have to affect the performance of other L1s right away.

• Communication between L1s: Avalanche Warp Messaging makes it possible to exchange messages between different Avalanche L1s.

• Fee burning on the Primary Network: Transaction fees on the Primary Network are burned and therefore permanently removed from circulation.

• Fast finality: Avalanche is designed to make transactions final quickly after validators reach enough agreement.

These features do not mean that every Avalanche L1 is automatically equally secure, liquid, or reliable. That also depends on how a specific L1 is set up.

What Are the Downsides of Avalanche?

There are also several points to keep in mind and trade-offs:

• High staking threshold for validators: Running your own validator on the Primary Network requires at least 2,000 AVAX. Delegation requires a minimum of 25 AVAX.

• No slashing: Validators that are not sufficiently reachable or correct do not lose their staked AVAX. They can, however, miss out on their staking reward.

• L1s depend on enough active validators: An Avalanche L1 can normally function as long as validators with a combined total of about 80% of the total validator weight are online and active. If that share drops too low, finality can slow down and the L1 may eventually stop processing transactions.

• Operators of L1s are responsible for everything: An Avalanche L1 has to handle things like validator management, upgrades, token rules, and security on its own. Mistakes during something like an upgrade can have major consequences for the network.

• Extra complexity because of multiple chains: The Primary Network consists of the P-Chain, C-Chain, and X-Chain, each with its own role. On top of that, Avalanche L1s can have their own rules and infrastructure. That makes the system more complex than a network with just one primary chain.

• Not always the same as the latest Ethereum version: The C-Chain and Subnet-EVM currently support the Cancun version of the EVM, but not newer changes from Pectra yet.

Staking rules, reward conditions, and EVM support may change through future network upgrades.

Conclusion

Avalanche is a proof-of-stake blockchain platform for smart contracts, digital assets, and independent Avalanche L1s. AVAX is the native token of the Primary Network and is used, among other things, for transaction fees and staking.

The Primary Network consists of three chains with different functions: the P-Chain for staking, validators, and L1 management, the C-Chain for EVM smart contracts, and the X-Chain for native Avalanche assets.

For consensus, Avalanche uses the Snow consensus family. Validators reach agreement by repeatedly asking small, randomly chosen groups of other validators for their preference.

A key part of Avalanche is the ability to build independent Avalanche L1s. These can use their own validators, tokens, transaction fees, and other network rules.

That flexibility also brings extra responsibility. The security, availability, and performance of an Avalanche L1 depend largely on how that specific L1 is set up and managed.

Avalanche therefore combines a fast Primary Network with an architecture in which different independent L1s can exist alongside each other.