Polkadot is Layer 0 for various parallel blockchains hosted on a relay chain, sharing $10 billion in security with the native DOT token at its core. Polkadot and the Polkadot SDK simplify the development and connection of decentralized applications as well as specifically tailored application blockchains (appchains), enabling a trustless ecosystem of appchains that can exchange messages and communicate with each other, creating complex and more advanced blockchain use cases.
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