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View ChartPolkadot is an open-source sharded multichain protocol that connects and secures a network of specialised blockchains, facilitating cross-chain transfer of any data or asset types, not just tokens, thereby allowing blockchains to be interoperable with each other. Polkadot was designed to provide a foundation for a decentralised internet of blockchains, also known as Web3.
Polkadot provides a foundation to support a decentralised web, controlled by its users, and to simplify the creation of new applications, institutions, and services.
The Polkadot protocol can connect public and private chains, permissionless networks, oracles, and future technologies, allowing these independent blockchains to trustlessly share information and transactions through the Polkadot Relay Chain.
Polkadot's native DOT token serves three clear purposes: staking for operations and security, facilitating network governance, and bonding tokens to connect parachains.
The majority of blockchains function autonomously, with no connection to any other blockchains. Cryptocurrencies such as Bitcoin (BTC), Ethereum (ETH), Cardano (ADA), and many more each have their own blockchain. Because they don't talk to each other, dApps developed on Ethereum and Cardano couldn't work together.
Polkadot is useful in that situation. Because it is a multichain network, it is able to connect multiple blockchains. Developers that utilise it have the ability to construct their own blockchains that can communicate with every other blockchain in the Polkadot network.
New opportunities for Polkadot's blockchains arise as a result of interoperability. Assume for the sake of argument that one blockchain permits the purchase of tokenised stock. It may be able to access the most recent stock price information from an independent blockchain.
Developers also benefit from Polkadot's handling of transaction validation and network security. The relay chain of the network processes the transactions. Developers won't have to worry about creating a safe method for validating transactions, freeing them to concentrate solely on blockchain initiatives.
There are thousands of cryptocurrencies across the ecosystem, a vast majority of which can't communicate with each other. For example, users can't send their Dogecoin over Chainlink, or vice versa. Polkadot aims to fix that by building a framework that interconnects blockchains, even if each chain performs different functions to one another.
At the centre of Polkadot sits the "relay chain," a central blockchain that connects all other participating blockchains together. The relay chain processes all transactions taking place in the ecosystem at the same time, with the goal of improving scalability.
User-created blockchains that hook into the relay chain are known as "parachains." By allowing blockchains to communicate with its platform, Polkadot is able to connect many blockchains in a way that wasn't possible before.
Polkadot relies on Nominated Proof-of-Stake (NPoS), a method of validating crypto transactions based on how many coins each participant has put up as collateral.
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Trade| Comparison Dimension | Polkadot (DOT) | Ethereum (ETH + Layer 2) | Cosmos (ATOM) |
|---|---|---|---|
| Shared Security | Strong native sharing (Relay Chain secures all parachains) | No native sharing (L2s settle on L1; L1s remain isolated) | Optional sharing (Opt-in ICS; Zones run their own validators by default) |
| Cross-Chain Communication | XCM (Cross-Consensus Messaging) | Relies on third-party bridges | IBC (Inter-Blockchain Communication) |
| Architectural Flexibility | Substrate framework, highly customisable Layer 1 | EVM-compatible, focused on Layer 2 scaling | Cosmos SDK, independent sovereign AppChains |
| Resource Allocation Model | Agile Coretime (Purchase compute cores on-demand or monthly) | Gas fees (Paid in ETH) | Independent gas fees and validator costs per chain |
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