A detailed discussion has already been carried out on scalability in Chapter 18, Scalability and Other Challenges; briefly, it is sufficient to say in this section that while some progress has already been made, still there is a need for more research to enable on-chain scalability and further improve off-chain solutions such as state channels. Some initiatives like block size increase and transaction-only blockchains (without blocks) have been proposed to address scalability issues that increase the capacity of the blockchain itself instead of using side channels. Examples of without blocks implementation include IOTA (Tangle). It is a DAG which is used to store transactions as compared to traditional blockchain solutions where ...
Scalability
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