What is a Layer 1 Blockchain: The Foundation of Crypto Explained
7 min read
Key Takeaways
Layer 1 blockchains are the base networks that process transactions and maintain security without relying on other networks
Bitcoin and Ethereum are the most famous Layer 1s, but newer chains like Solana and Avalanche offer faster speeds and lower costs
These networks face the “blockchain trilemma” – balancing security, speed, and decentralization is challenging
Layer 1s use different consensus mechanisms like Proof of Work (Bitcoin) or Proof of Stake (Ethereum) to validate transactions
They’re essential for DeFi, NFTs, and crypto apps because they provide the foundation that everything else builds upon
Quick Answer: A Layer 1 blockchain is the main network that handles all transactions, security, and rules for a cryptocurrency. Think of it as the foundation of a building – everything else gets built on top of it. Popular examples include Bitcoin, Ethereum, and Solana.
Understanding Layer 1 Blockchain: The Building Blocks
Imagine blockchain technology as a multi-story building. Layer 1 blockchain is the foundation – the concrete base that everything else sits on. Without a solid foundation, the whole structure would collapse.
Layer-1 blockchains are the foundational layer of the blockchain infrastructure. These are responsible for running the consensus protocol, processing transactions, and maintaining the distributed ledger. Unlike other types of networks that depend on existing blockchains, Layer 1 networks are completely independent.
When you send Bitcoin to a friend or buy an NFT on Ethereum, you’re using Layer 1 blockchain technology. These networks handle everything from start to finish – they check if you have enough money, process your transaction, and record it permanently on their digital ledger.
Chia Network: The Green Alternative
Chia Network (XCH) is a layer 1 blockchain that uses its own custom-designed programming language called Chialisp and a novel consensus mechanism called proof-of-space-and-time (PoST). Founded in 2017, Chia combines Proof of Space and Proof of Time to achieve efficient transaction validation with minimal energy consumption aiming to make the crypto space more environmentally friendly.
What makes Chia unique is how it works. Chia’s Proof of Space and Time consensus uses storage capacity as the scarce resource. This comes much closer than previous systems to Satoshi’s original ideal of “one CPU, one vote,” where a vote refers to a chance to win and validate a block. Instead of burning electricity like Bitcoin mining, Chia “farmers” (not miners) use unused hard drive space to secure the network.
All you need to become part of Chia Network is space on your hard drive. The network processes around 20 transactions per second with extremely low fees of about $0.01 per transaction, making it affordable for everyday use.
The Core Components of Layer 1 Networks
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Every Layer 1 blockchain has four main parts working together:
Consensus Mechanism: This is how the network decides which transactions are valid. A public decentralized layer one network’s primary characteristic is its consensus mechanism. Different consensus mechanisms provide different levels of speed, security, and throughput.
Native Cryptocurrency: Each Layer 1 has its own digital coin used to pay transaction fees. Bitcoin uses BTC, Ethereum uses ETH, and so on.
Transaction Processing: The network validates and records every transaction, creating a permanent history that can’t be changed.
Smart Contract Support: Many Layer 1s (but not Bitcoin) can run programmable agreements called smart contracts.
How Layer 1 Blockchain Networks Actually Work
Let’s break down what happens when you make a cryptocurrency transaction on a Layer 1 network:
Step 1: You Submit a Transaction You tell the network you want to send crypto to someone. This includes the recipient’s address and how much you’re sending.
Step 2: Network Verification Most networks process transactions by logging a user’s cryptocurrency wallet via asymmetric key pairs and its corresponding coin or token balances. The network checks if you actually have the funds you’re trying to send.
Step 3: Consensus and Confirmation Network participants (miners or validators) compete to bundle your transaction with others into a new block. Once enough participants agree, your transaction is confirmed.
Step 4: Permanent Recording Your transaction gets permanently added to the blockchain ledger, where it can never be changed or deleted.
Layer 1 Network
Consensus Method
Transaction Speed
Main Use Case
Bitcoin
Proof of Work
4.6 TPS
Digital Money
Ethereum
Proof of Stake
15 TPS
Smart Contracts & DeFi
Solana
Proof of History + Proof of Stake
3,000+ TPS
Fast DApps & NFTs
Chia
Proof of Space and Time
~20 TPS
Green DeFi & Enterprise Finance
Avalanche
Avalanche Consensus
4,500+ TPS
DeFi & Enterprise Apps
The Blockchain Trilemma: Layer 1’s Biggest Challenge
Here’s where things get tricky. The balancing act between decentralization, security, and scalability within a blockchain infrastructure is known as the blockchain trilemma. Layer 1 networks struggle to excel at all three simultaneously:
The Trilemma Explained: Imagine you’re designing a car. You can make it fast, cheap, or luxurious – but you can usually only pick two. Layer 1 blockchains face a similar trade-off between being secure, fast, and truly decentralized.
Security vs. Speed vs. Decentralization
Bitcoin chose security and decentralization but sacrificed speed. While centralized payment systems like Visa process at least 1700 Transactions Per Second (TPS), Bitcoin and Ethereum are capped at 4.6 and 15 TPS respectively.
Solana prioritized speed and lower costs but some argue this came at the expense of full decentralization, as it requires more powerful computers to run nodes.
Ethereum aims for balance by transitioning to Proof of Stake and implementing scaling solutions, though this transition took years to complete.
Layer 1 Blockchain Use Cases: Beyond Digital Money
While Bitcoin pioneered digital money, modern Layer 1 blockchains power diverse applications across multiple industries:
Decentralized Finance (DeFi)
Layer 1 networks enable lending, borrowing, and trading without traditional banks. Ethereum hosts the largest DeFi ecosystem, while newer chains offer faster and cheaper alternatives. Chia Network envisions various use cases for Chia, including asset tokenization, decentralized exchanges (DEX), decentralized finance (DeFi), and efficient cross-border personal payments.
Enterprise and Institutional Applications
Some Layer 1 blockchains target business use cases. Chia Network is a public, for-profit, open source company that aspires to become listed on NYSE or NASDAQ. Its blockchain is aimed at enterprise use, which is why Chia Network plans to have XCH on its balance sheet in case of a listing. This traditional corporate approach makes it attractive for institutions that prefer regulated, transparent business structures.
Cross-Border Payments and Stablecoins
Layer 1 networks enable instant global transfers at low cost. Stably launched its USD-backed stablecoin on Chia in 2022 and introduced a Bitcoin and Ethereum bridge to the Chia ecosystem in 2023, making it easier to move value between different blockchain ecosystems.
Environmental and Social Impact
Networks like Chia prioritize sustainability. Instead of requiring miners to solve complex mathematical problems, it allows them to use their unused disk space to validate transactions and create new blocks. It’s like turning your unused garage space into a profitable business without the massive electricity bills of traditional crypto mining.
Real-World Layer 1 Examples and Success Stories
Case Study: Solana’s Rise
Solana (SOL) continues to demonstrate impressive resilience, recording a +180% increase in the last year. The network’s success came from solving real problems – developers could build fast, cheap applications that actually worked for everyday users. Its Proof of History consensus mechanism enables thousands of transactions per second at a fraction of Ethereum’s cost.
Case Study: Chia’s Enterprise-Ready DeFi Ecosystem
Chia Network showcases how Layer 1 blockchains can serve enterprise and institutional needs. Through partnerships with Stably, Chia launched USDS, the first dollar-denominated stablecoin on its network, along with bridged Bitcoin (BTCS) and Ethereum (ETHS). The network’s “Offers” feature enables peer-to-peer trading with zero counterparty risk, while Chia Asset Tokens (CATs) provide tokenization capabilities similar to Ethereum’s ERC-20 standard but with enhanced security through its Chialisp programming language.
Feature
Layer 1 Blockchain
Traditional System
Control
Decentralized (no single authority)
Centralized (banks, governments)
Transparency
All transactions public
Private, limited visibility
Accessibility
24/7, global access
Limited by business hours, geography
Fees
Variable, sometimes high
Usually fixed, predictable
Speed
Slower (seconds to minutes)
Often instant for users
Layer 1 vs. Layer 2: What’s the Difference?
Think of Layer 1 as the main highway system and Layer 2 as express lanes built on top. Layer 2 networks extend the functionality of their layer 1 counterpart. This can be to increase the layer 1 network’s performance, reduce transaction fees, or increase programmability.
Layer 1 handles the core functions:
Final transaction settlement
Network security
Consensus and validation
Native cryptocurrency issuance
Layer 2 adds speed and efficiency:
Faster transaction processing
Lower fees for users
Additional features and capabilities
Still relies on Layer 1 for security
Key Insight: Layer 2 solutions like Bitcoin’s Lightning Network or Ethereum’s Arbitrum can only exist because they have secure Layer 1 foundations to build upon. Without strong Layer 1 networks, Layer 2 solutions would be meaningless.
The Future of Layer 1 Blockchain Technology
The Layer 1 space is rapidly evolving. The layer 1 blockchain sector is definitely being shaken up by the arrival of new players. From Berachain to Hyperliquid, via Sui and Aptos, let’s discover the layer 1s to watch in 2025.
Emerging Trends Include:
Modular Design: New networks are splitting functions across specialized layers rather than trying to do everything on one chain.
Better Consensus Mechanisms: Projects are developing new ways to validate transactions that are faster, more secure, or use less energy.
Application-Specific Chains: Some Layer 1s are being designed for specific use cases like gaming, DeFi, or enterprise applications rather than trying to be everything to everyone.
Corporate Adoption: Google Cloud is moving forward with plans to launch its own layer-1 (L1) blockchain, positioning the network as neutral infrastructure for global finance, showing that major tech companies see Layer 1 networks as critical infrastructure.
Take Control of Your Crypto Journey
Layer 1 blockchains are the foundation that makes all cryptocurrency and blockchain applications possible. Understanding these networks helps you make better decisions about which cryptocurrencies to use, invest in, or build applications on.
Whether you’re sending money globally with Bitcoin, trading on Ethereum, or exploring new applications on Solana, you’re interacting with Layer 1 blockchain technology. These networks continue evolving to become faster, cheaper, and more user-friendly while maintaining the security and decentralization that makes cryptocurrency revolutionary.
Ready to dive deeper? Start by exploring the different Layer 1 networks and understanding which ones best fit your needs.
Layer 1 Blockchain FAQs
What makes a blockchain “Layer 1” instead of something else?
A Layer 1 blockchain is independent and doesn’t need any other network to function. It has its own consensus mechanism, processes its own transactions, and maintains its own security. Layer 1 networks like Bitcoin and Ethereum can operate completely on their own, while Layer 2 networks need to connect to a Layer 1 for security and final transaction settlement.
Why can’t Layer 1 blockchain networks just be made faster?
Layer 1 networks face the blockchain trilemma – they can be secure, fast, or decentralized, but it’s extremely difficult to maximize all three. Making a network faster often requires sacrificing some decentralization or security. This is why many networks use Layer 2 solutions to add speed while keeping the Layer 1 secure and decentralized.
Which Layer 1 blockchain is best for beginners?
Bitcoin is the simplest Layer 1 blockchain to understand because it only does one thing – digital money transfers. Ethereum is more complex but offers the most learning opportunities with smart contracts and DApps. Solana offers a good middle ground with faster, cheaper transactions while still supporting advanced features.
Do all cryptocurrencies have their own Layer 1 blockchain?
No, many cryptocurrencies are actually tokens that run on existing Layer 1 networks. For example, thousands of tokens run on Ethereum’s Layer 1 blockchain, including popular ones like USDC and many DeFi tokens. Only cryptocurrencies with their own independent networks qualify as Layer 1.
What makes Chia blockchain different from other Layer 1 networks?
Chia blockchain uses Proof of Space and Time instead of energy-intensive mining or staking requirements. Farmers use unused hard drive space to secure the network, making it extremely energy-efficient. Chia also has a traditional corporate structure and aims to be publicly listed, making it more attractive to enterprise users than typical crypto projects.
