MultiversX Crypto Verification — `self.crypto()` API Reference

Complete reference for hashing and signature verification in MultiversX smart contracts (SDK v0.64+).

Hashing Functions

All hashing functions take &ManagedBuffer (or anything that borrows as ManagedBuffer) and return a fixed-size ManagedByteArray.

Method	Return Type	Output Size	Use Case
`.sha256(data)`	`ManagedByteArray<A, 32>`	32 bytes	General purpose hashing, Merkle trees
`.keccak256(data)`	`ManagedByteArray<A, 32>`	32 bytes	Ethereum compatibility, EIP-712
`.ripemd160(data)`	`ManagedByteArray<A, 20>`	20 bytes	Bitcoin address derivation (rare)

// Hash a message
let message = ManagedBuffer::from("data to hash");
let hash: ManagedByteArray<Self::Api, 32> = self.crypto().sha256(&message);