jsonrpsee_core/
id_providers.rs

1// Copyright 2019-2021 Parity Technologies (UK) Ltd.
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26
27//! Subscription ID providers.
28
29use rand::{distr::Alphanumeric, Rng};
30
31use crate::traits::IdProvider;
32use jsonrpsee_types::SubscriptionId;
33
34/// Generates random integers as subscription ID.
35#[derive(Debug, Copy, Clone)]
36pub struct RandomIntegerIdProvider;
37
38impl IdProvider for RandomIntegerIdProvider {
39	fn next_id(&self) -> SubscriptionId<'static> {
40		const JS_NUM_MASK: u64 = !0 >> 11;
41		(rand::random::<u64>() & JS_NUM_MASK).into()
42	}
43}
44
45/// Generates random strings of length `len` as subscription ID.
46#[derive(Debug, Copy, Clone)]
47pub struct RandomStringIdProvider {
48	len: usize,
49}
50
51impl RandomStringIdProvider {
52	/// Create a new random string provider.
53	pub fn new(len: usize) -> Self {
54		Self { len }
55	}
56}
57
58impl IdProvider for RandomStringIdProvider {
59	fn next_id(&self) -> SubscriptionId<'static> {
60		let mut rng = rand::rng();
61		(&mut rng).sample_iter(Alphanumeric).take(self.len).map(char::from).collect::<String>().into()
62	}
63}
64
65/// No-op implementation to be used for servers that don't support subscriptions.
66#[derive(Debug, Copy, Clone)]
67pub struct NoopIdProvider;
68
69impl IdProvider for NoopIdProvider {
70	fn next_id(&self) -> SubscriptionId<'static> {
71		0.into()
72	}
73}
jsonrpsee_core/id_providers.rs

jsonrpsee_core/
id_providers.rs
