Modular project #Celestia study notes Part2:

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The Impossible Triangle and Data Availability Issues The Impossible Triangle, also known as the Trilemma, usually refers to the inability to achieve both decentralization, scalability, and security at the same time. It was first proposed by Ethereum Officially proposed.

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When transactions are uploaded to the chain, they first enter Mempool, where they are "selected" by miners, packaged into blocks, and the blocks are spliced ​​into the blockchain. The block containing this transaction will be broadcast to all nodes in the network. Other full nodes will download this new block, perform complex calculations, and verify each transaction to ensure that the transaction is authentic and valid. Complex calculations and redundancy are the foundation of Ethereum’s security, and they also bring problems.