Meet the Tech:
Async Calls from Contracts 🧩
The protocol-level mechanism that lets one MultiversX contract call another, even when they live on different shards.
Cross-shard calls are asynchronous by design — there's no synchronous return across the metachain. The framework gives you a typed surface over the async semantics.
Initiate with async_call_and_exit, receive the response in a #[callback].
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