> For the complete documentation index, see [llms.txt](https://docs.onchainden.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.onchainden.com/signing-and-executing/simulation.md).

# Simulation

Simulate transactions before you execute

Den lets you simulate transactions, so you can be confident in the outcome before you execute. Simulations show you if a transaction succeeds, how state changes, and what event logs are emitted.

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