Preimages Pallet

The Preimages Pallet is a specialized component in the Substrate runtime that facilitates the storage, retrieval, and management of large data blobs (preimages) on-chain. It is particularly useful for governance and other modules requiring access to detailed proposals or large datasets while minimizing storage costs.

Key functionalities:

• Efficient Storage of Preimages: Allows users to submit and store large preimage data off-chain initially, ensuring cost-effective on-chain storage.

• On-Demand Retrieval: Enables on-chain modules, such as governance proposals, to reference and retrieve preimages only when they need to be executed or evaluated.

• Preimage Validation: Includes a framework to validate and verify the integrity of preimages against hashes before use and ensures that the preimage data corresponds accurately to its referenced hash.

• Access and Ownership Control: Supports fine-grained access controls, ensuring only authorized entities can submit or clear preimages and allows multiple modules and users to leverage preimages securely without conflict.