MultiversX Blockchain Data — `self.blockchain()` API Reference

Complete reference for reading on-chain state in MultiversX smart contracts (SDK v0.64+).

Caller & Account Info

Method	Returns	Description
`.get_caller()`	`ManagedAddress`	Address that initiated the current call
`.get_sc_address()`	`ManagedAddress`	This contract's own address
`.get_owner_address()`	`ManagedAddress`	Contract owner address
`.check_caller_is_owner()`	`()`	Panics if caller != owner. Equivalent to `#[only_owner]`.
`.check_caller_is_user_account()`	`()`	Panics if caller is a smart contract (not an EOA).
`.is_smart_contract(address)`	`bool`	Check if an address is a smart contract
`.get_shard_of_address(address)`	`u32`	Get shard ID for an address

// Owner-only guard (manual alternative to #[only_owner])
self.blockchain().check_caller_is_owner();