# Fuel RPC Node and Chain settings

- By Denis Perepelitsyn
- July 3, 2026
- [Web3 Infrastructure & RPC](/blog/?category=Web3%20Infrastructure%20%26%20RPC)

![Fuel RPC Node and Chain settings](/img/blog/post92.png)

[Crypto-Chief is excited to release Fuel ](https://crypto-chief.com/rpc/fuel/)on our Web3 API service, the blockchain bringing high-performance verification and scalability to all! This is great news for developers looking to build advanced dApps on top of Fuel. Users will be able to access Fuel Public and Premium RPCs, make request calls, and receive information returns identical to those they would get by running a node themselves.

## Key Takeaways

- **Fuel is a modular execution layer designed specifically for Ethereum rollups.**
- **FuelVM enables native parallel transaction execution using a UTXO-based execution model.**
- **Fuel separates execution from consensus and settlement to maximize scalability.**
- **The Sway programming language provides a secure, developer-friendly alternative to Solidity.**
- **Fuel introduces native multi-asset support and state-minimized execution for improved blockchain efficiency.**

## Table of Contents

- [What Is Fuel?](#what-is-fuel)
- [How Fuel Works](#how-fuel-works)
- [FuelVM and the Fuel Architecture](#fuelvm-and-the-fuel-architecture)
- [Why Fuel Is Different from Traditional Ethereum Rollups](#why-fuel-is-different-from-traditional-ethereum-rollups)
- [Frequently Asked Questions](#faq)

## What Is Fuel?

Fuel is a modular blockchain execution layer engineered specifically for Ethereum rollups. Rather than functioning as a standalone Layer 1 blockchain, Fuel focuses on one responsibility—efficient transaction execution—while Ethereum continues to provide settlement and security.

This modular approach allows Fuel to optimize execution independently of consensus and data availability. By separating these blockchain components, Fuel removes many of the architectural limitations that restrict traditional EVM-based rollups.

Unlike conventional Ethereum Layer 2 solutions that inherit the EVM's sequential execution model, Fuel introduces a completely redesigned execution environment capable of processing many independent transactions simultaneously.

## How Fuel Works

Fuel follows a modular blockchain architecture that separates blockchain responsibilities into specialized layers.

- **The execution layer processes smart contracts and transactions.**
- **The settlement layer verifies execution results and inherits Ethereum's security.**
- **The data availability layer stores transaction data needed for verification.**

By focusing solely on execution, Fuel eliminates unnecessary overhead and allows every system component to be optimized independently. This architecture improves scalability while maintaining compatibility with Ethereum's broader ecosystem.

### Parallel Transaction Execution

One of Fuel's defining innovations is native parallel transaction execution.

Most blockchain virtual machines process transactions sequentially because they cannot determine whether two transactions modify the same state until execution begins.

Fuel solves this limitation using explicit state access lists derived from its UTXO model.

Before execution starts, Fuel already knows which state objects every transaction will access. Independent transactions are therefore executed simultaneously across multiple CPU cores instead of waiting in a single processing queue.

Benefits include:

- **significantly higher throughput;**
- **lower execution latency;**
- **improved CPU utilization;**
- **better scalability under heavy network demand.**

Parallel execution is built directly into FuelVM rather than added as an external optimization.

## FuelVM and the Fuel Architecture

FuelVM is the virtual machine responsible for executing every smart contract and transaction within the Fuel ecosystem.

Unlike Ethereum's stack-based EVM, FuelVM uses a register-based architecture that reduces computational overhead and improves execution efficiency.

FuelVM incorporates lessons learned from multiple blockchain virtual machines, including the Ethereum Virtual Machine and Solana's runtime, while introducing features specifically designed for modular execution.

Key capabilities include:

- **Native Parallel Processing**  
FuelVM executes independent transactions concurrently without sacrificing deterministic execution.
- **Register-Based Design**  
Registers reduce instruction complexity and improve processing efficiency compared to traditional stack-based execution models.
- **Native Multi-Asset Support**  
FuelVM treats multiple digital assets as first-class citizens instead of relying on smart contract abstractions for every token operation.
- **State-Minimized Execution**  
Fuel reduces unnecessary global state growth through native assets, predicates, and stateless scripting mechanisms, lowering storage requirements for network participants.

### The UTXO Model

Instead of Ethereum's account-based architecture, Fuel adopts an extended UTXO (Unspent Transaction Output) model.

Every transaction explicitly identifies the resources it consumes before execution begins.

This design offers several advantages:

- **deterministic dependency tracking;**
- **safe parallel execution;**
- **reduced state conflicts;**
- **improved transaction validation;**
- **higher scalability.**

The UTXO architecture forms the foundation that enables Fuel's parallel execution engine.

### Sway Programming Language

Fuel introduces Sway, a domain-specific programming language created specifically for FuelVM.

Although its syntax feels familiar to Solidity developers, Sway emphasizes stronger compile-time safety and predictable execution.

Key characteristics include:

- **modern syntax inspired by Rust;**
- **strong static typing;**
- **improved memory safety;**
- **optimized smart contract development;**
- **seamless integration with Fuel tooling.**

Together with FuelVM, Sway provides developers with a modern environment for building high-performance decentralized applications.

## Why Fuel Is Different from Traditional Ethereum Rollups

Most Ethereum rollups inherit many architectural constraints from the Ethereum Virtual Machine.

Fuel instead redesigns the execution layer from the ground up.

| Feature              | Traditional EVM Rollups | Fuel                |
| -------------------- | ----------------------- | ------------------- |
| Execution model      | Sequential              | Parallel            |
| Architecture         | Monolithic execution    | Modular execution   |
| Virtual machine      | EVM                     | FuelVM              |
| Programming language | Solidity                | Sway                |
| Asset model          | Smart contract tokens   | Native multi-assets |
| State model          | Accounts                | Extended UTXO       |

These architectural improvements allow Fuel to deliver significantly higher computational efficiency without requiring changes to Ethereum itself.

### Benefits of Fuel

Fuel provides several technical advantages for blockchain developers.

- **Higher Throughput**  
Parallel execution allows substantially more transactions to be processed simultaneously.
- **Lower Latency**  
Independent transactions no longer wait for unrelated operations to complete.
- **Better Developer Experience**  
FuelVM and Sway simplify the development of efficient smart contracts.
- **Ethereum Security**  
Fuel inherits Ethereum's settlement guarantees while optimizing execution independently.
- **Future Scalability**  
The modular architecture enables individual blockchain components to evolve without redesigning the entire protocol.

### Potential Use Cases

Fuel's architecture is well suited for applications requiring high throughput and efficient execution, including:

- **decentralized exchanges (DEXs);**
- **lending protocols;**
- **on-chain gaming;**
- **AI-powered decentralized applications;**
- **real-time blockchain infrastructure;**
- **payment systems;**
- **tokenized assets;**
- **enterprise blockchain applications.**

_This content is for informational and educational purposes only and does not constitute financial, investment, or legal advice._

## Frequently Asked Questions

### What is Fuel?

Fuel is a modular execution layer for Ethereum rollups that improves scalability through parallel execution, FuelVM, and a UTXO-based architecture.

### What is FuelVM?

FuelVM is Fuel's virtual machine that supports register-based execution, native multi-asset management, and parallel transaction processing.

### How does Fuel achieve parallel execution?

Fuel uses an extended UTXO model that identifies transaction dependencies before execution, allowing independent transactions to run simultaneously across multiple CPU cores.

### What programming language does Fuel use?

Fuel uses Sway, a programming language specifically designed for FuelVM that emphasizes security, efficiency, and developer productivity.

### Is Fuel a Layer 1 blockchain?

No. Fuel is a modular execution layer designed for Ethereum rollups. Ethereum continues to provide settlement and security, while Fuel specializes in high-performance transaction execution.

Tags: [Fuel](/blog/?tag=Fuel) [Modular Execution](/blog/?tag=Modular%20Execution) [FuelVM](/blog/?tag=FuelVM) [Sway](/blog/?tag=Sway) [UTXO](/blog/?tag=UTXO) [RPC Node](/blog/?tag=RPC%20Node)