1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49

// Copyright 2019-2021 Parity Technologies (UK) Ltd.
//
// Permission is hereby granted, free of charge, to any
// person obtaining a copy of this software and associated
// documentation files (the "Software"), to deal in the
// Software without restriction, including without
// limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice
// shall be included in all copies or substantial portions
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

/// A type that returns the error as a `String` from `SubscriptionCallback`.
#[derive(Debug)]
pub struct StringError(pub(crate) String);

impl<T: ToString> From<T> for StringError {
	fn from(val: T) -> Self {
		StringError(val.to_string())
	}
}

/// The error returned when registering a method or subscription failed.
#[derive(Debug, Clone, thiserror::Error)]
pub enum RegisterMethodError {
	/// Method was already registered.
	#[error("Method: {0} was already registered")]
	AlreadyRegistered(String),
	/// Subscribe and unsubscribe method names are the same.
	#[error("Cannot use the same method name for subscribe and unsubscribe, used: {0}")]
	SubscriptionNameConflict(String),
	/// Method with that name has not yet been registered.
	#[error("Method: {0} has not yet been registered")]
	MethodNotFound(String),
}