# \#semantics **URL:** https://forum.anoma.net/tag/semantics/41.md [Latest](https://forum.anoma.net/latest.md) · [Categories](https://forum.anoma.net/categories.md) · [Tags](https://forum.anoma.net/tags.md) --- ## [Flat Transaction Constraint](https://forum.anoma.net/t/flat-transaction-constraint/2466)
**Author:** [@jonathan](https://forum.anoma.net/u/jonathan)\ **Replies:** 0\ **Last updated:** [November 12, 2025, 12:35pm UTC](https://forum.anoma.net/t/flat-transaction-constraint/2466 "2025-11-12T12:35:13Z")
One decision we made for the current transaction layer is to forbid transaction nesting. This post is about what that is, the solutions I saw, and related topics. Another issue is forbidding cross-controller transactions…