KUB Layer 2 Network

Introduction to Layer 2 Networks

Blockchain technology, in its foundational form (known as a Layer 1 network), faces a well-known challenge: the blockchain trilemma. This concept states that a blockchain can only effectively achieve two of the three key properties: scalability, security, and decentralization.

A Layer 1 network like KUB, or others like Ethereum, prioritizes security and decentralization, but this can lead to limitations in transaction speed and higher fees when network usage is high.

A Layer 2 network is a secondary framework or protocol built on top of a Layer 1 blockchain. Its primary purpose is to address the scalability issue by handling a large number of transactions off the main chain, thereby increasing the network's throughput and reducing transaction costs.

The Rollup Approach

The KUB Layer 2 network, like many modern L2 solutions, utilizes a technology called a rollup. Rollups bundle hundreds of transactions into a single, compressed transaction that is then submitted to the main Layer 1 network. This significantly reduces the amount of data that needs to be processed on the main chain, leading to faster and cheaper transactions.

There are two main types of rollups:

• Optimistic Rollups: This model operates under the assumption that all transactions bundled in a rollup are valid. It only verifies the transactions if a fraud proof is submitted by a user who suspects fraudulent activity. This optimistic approach allows for very high transaction speeds. A challenge period is a key feature, giving users a window of time to submit a fraud-proof.

• Zero-Knowledge (ZK) Rollups: These rollups use complex cryptographic proofs (known as ZK-proofs) to instantly verify the validity of off-chain transactions. A small proof is submitted to the Layer 1 network, which cryptographically guarantees that all transactions in the bundle are valid. This provides near-instant finality without a challenge period.

KUB Layer 2 Network

The KUB Layer 2 network is an extension of the main KUB network (Layer 1). It is designed to enhance the KUB network's performance by providing a low-cost, high-speed environment for decentralized applications (dApps) and user transactions.

Connecting to the KUB Layer 2 Network

Connecting to the KUB Layer 2 network is a straightforward process, similar to connecting to other blockchain networks. You will need a compatible cryptocurrency wallet, such as MetaMask. You can follow the instructions in this guide or enter the following RPC details:

Layer 2 Mainnet

Name	Value
Network Name	KUB Layer 2 Mainnet
RPC URL	https://kublayer2.kubchain.io
Chain ID	9601
Currency Symbol	KUB
Block Explorer URL	https://kublayer2.kubscan.com

Layer 2 Testnet

Obtaining tKUB on the KUB Layer 2 Testnet

For developers wishing to develop their decentralized applications (dApps) on the KUB Layer 2 Testnet, you will need some tKUB. To obtain tKUB on the KUB Layer 2 Testnet, you first need to acquire tKUB on the KUB Testnet. Follow this guide or visit the KUB Faucet to obtain some tKUB.

Once you have received your tKUB, navigate to the section labeled Bridge to KUB Layer 2 Testnet. You will be presented with options to select the amount of tKUB you want to transfer from the KUB Testnet to the KUB Layer 2 Testnet. After making your selection, follow the on-screen instructions to complete the bridging process.

You'll be able to receive 5 tKUB every 24 hours using the KUB Faucet.