jsonrpsee_core/traits.rs
1// Copyright 2019-2021 Parity Technologies (UK) Ltd.
2//
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26
27use jsonrpsee_types::SubscriptionId;
28
29/// Trait to generate subscription IDs.
30pub trait IdProvider: Send + Sync + std::fmt::Debug {
31 /// Returns the next ID for the subscription.
32 fn next_id(&self) -> SubscriptionId<'static>;
33}
34
35// Implement `IdProvider` for `Box<T>`
36//
37// It's not implemented for `&'_ T` because
38// of the required `'static lifetime`
39// Thus, `&dyn IdProvider` won't work.
40impl<T: IdProvider + ?Sized> IdProvider for Box<T> {
41 fn next_id(&self) -> SubscriptionId<'static> {
42 (**self).next_id()
43 }
44}