# Atomicity

Solana guarantees the execution of all transactions within a Rome transaction as atomic, meaning either all transactions that are part of this Rome transaction succeed or none of them succeed. It removes the risk of a transaction in the bundle reverting only on one chain.

This enables **trust-less, non-custodial** transactions for **cross-rollup** and **cross-chain** **arbitrage** between L2s and Solana, **flash loans**, and **RWA applications**. 

Solana is the **global state machine** for rollups that use Rome, allowing the atomic composition, and ordering/execution of transactions.

<figure><img src="/files/8uyaLDkm8IQJ7tM0ayQv" alt=""><figcaption></figcaption></figure>


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