100 Q&A about CUN 048 | Cross-Chain Technologies

Cross-chains refer to the interoperability of information or value across different blockchain protocols. The problem of interoperability rests as a limitation in blockchain application, while cross-chain mechanism can facilitate the exchange among relatively different and independent blockchains. If we take public chains as isolated islands of blockchains, cross-chain technologies are the bridges between them.

In 2016, based on BTC-Relay, Bitcoin has enabled one-way cross-chain connection from Bitcoin to Ethereum. In the same year, Vitalik Buterin, the founder of Ethereum, proposed four cross-chain technologies in his essay Chain Interoperability. Presently, the prevailing blockchain projects focusing on cross-chain technologies include Polkadot and Cosmos, etc.

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