MultiversX Cache Patterns

Why Cache?

• Storage reads/writes are the most expensive operations in MultiversX smart contracts
• A single endpoint that reads 5 storage values and writes 3 back costs 8 storage operations
• With a cache: 5 reads on entry + 3 writes on exit = same, BUT intermediate reads within the function are FREE (in-memory)

Pattern 1: Write-Back Cache with Drop Trait

The core pattern: load state into a struct on entry, mutate in memory, commit on scope exit via Drop.

multiversx_sc::imports!();
use multiversx_sc::derive_imports::*;

pub struct StorageCache<'a, C>
where
    C: crate::storage::StorageModule,
{