feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

2025-12-13 15:44:15 +03:00
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+# Session Index
+
+Get the session index that is expected at the child of a block.
+
+In the [`Initializer`](../runtime/initializer.md) module, session changes are buffered by one block. The session index
+of the child of any relay block is always predictable by that block's state.
+
+This session index can be used to derive a [`SigningContext`](../types/candidate.md#signing-context).
+
+```rust
+/// Returns the session index expected at a child of the block.
+fn session_index_for_child(at: Block) -> SessionIndex;
+```