A powerful and seamless data indexing solution is the bedrock of any blockchain—be it L1/L2 public blockchains, rollups, or appchains. Our focus for this article will be the use-case-specific appchains. By use-case-specific, we mean a permissioned enterprise appchain that caters to a single use case, such as DeFi. Plus, the chain is open to only authorized participants, and it will need to retrieve large amounts of data from various sources. If you are building such an appchain or you already...