build method

@override SendState build()

Initialize a Notifier.

It is safe to use Ref.watch or Ref.listen inside this method.

If a dependency of this Notifier (when using Ref.watch) changes, then build will be re-executed. On the other hand, the Notifier will not be recreated. Its instance will be preserved between executions of build.

If this method throws, reading this provider will rethrow the error.

Implementation

@override
SendState build() {
  // A watched-dep change (the session flips) RE-RUNS build() on the SAME
  // notifier, firing the prior cycle's onDispose first → `_disposed` would
  // stick `true` and wedge every later `_set` (#330 — one identity switch
  // left the screen permanently dead). Reset it each build so the controller
  // stays live across a session change; the INSTANCE-IDENTITY guards on the
  // post-await arms keep the old cycle's in-flight continuations from
  // writing into the new one.
  _disposed = false;
  // A rebuild is a NEW flow: the identity switch that triggers it resets the
  // machine to a clean form, and anything a previous entry was waiting on
  // belongs to the flow that ran under the previous identity.
  _flowId++;
  ref.onDispose(() => _disposed = true);
  // Cached for the actions. The session seam can legitimately flip to null (the
  // wallet closed) — `build()` re-runs and resets to a clean form, which is the
  // honest behavior (a send screen with no live wallet must not hold a stale
  // proposal).
  _session = ref.watch(walletSessionProvider);
  return const SendForm();
}