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Technical writings on smart contracts, security research, and software engineering.
Bulk Storage Extraction
Most Dapp developers have heard of and probably use the excellent Multicall contract to bundle their eth_calls and reduce latency for bulk ETL in their applications (we do too, we even have a python library for it: Manifold).
Unfortunately, we cannot use this same trick when getting storage slots, as we discovered when developing our storage explorer, forcing developers to issue an eth_getStorageAt for each slot they want to query. Luckily, Geth has a trick up its sleeve, the “State Override Set”, which, with a little ingenuity, we can leverage to get bulk storage extraction.