When it comes to decentralized finance, the networks that make it run are divided into layers. What lies below Layer 1 blockchains are made up of stalwarts such as Bitcoin or Ethereum. Layer 2 networks comprise next-generation projects such as Aribitrum. And Layer 0 networks may be the least understood.

Cosmos is a key Layer 0. It connects different blockchains into a meta-blockchain system. On Layer 0, a smart contract on one network may execute a transaction on another. This blockchain interconnectivity is at the heart of Cosmos. Moreover, Cosmos provides a framework to build blockchain networks themselves.

divided into layers. What lies below Layer 1 blockchains are made up of stalwarts such as Bitcoin or Ethereum. Layer 2 networks comprise next-generation projects such as Aribitrum. And Layer 0 networks may be the least understood.

Cosmos is a key Layer 0. It connects different blockchains into a meta-blockchain system. On Layer 0, a smart contract on one network may execute a transaction on another. This blockchain interconnectivity is at the heart of Cosmos. Moreover, Cosmos provides a framework to build blockchain networks themselves.

Why should I use Cosmos?

Cosmos solves three primary problems in blockchain: sovereignty, scalability, and sustainability.

Sovereignty: The Cosmos SDK is free for developers and allows them to build sovereign blockchain apps without ongoing costs.

Scalability: No matter how many transactions per second a blockchain can claim, in Cosmos, developers can always improve throughput with horizontal scalability.

Sustainability: Cosmos blockchains use an efficient Proof-of-Stake (PoS) consensus algorithm for securing the network.

What is the Cosmos Hub?

The Cosmos Hub is a blockchain that serves as the economic center of Cosmos. 

The Hub provides valuable services to the blockchains connected to it, including the largest interchain token exchange, shared security through interchain security, bridges to Ethereum and Bitcoin, and secure custodianship of digital assets.

The Cosmos Hub’s primary token is ATOM.

An application-specific blockchain is a blockchain customized to operate a single application, created from scratch instead of building on top of an existing blockchain.

Examples of Appchains

Layer3 supports all app-chains and your COSMOS addresses co-relates to all the other appchains as well. 

For example, your cosmos18xyz...qae = persistence18 xyz..qae. So all your appchain addresses come under your single cosmos addresses.