tp_runtime/generic/
checked_extrinsic.rs

1// This file is part of Tetcore.
2
3// Copyright (C) 2017-2021 Parity Technologies (UK) Ltd.
4// SPDX-License-Identifier: Apache-2.0
5
6// Licensed under the Apache License, Version 2.0 (the "License");
7// you may not use this file except in compliance with the License.
8// You may obtain a copy of the License at
9//
10// 	http://www.apache.org/licenses/LICENSE-2.0
11//
12// Unless required by applicable law or agreed to in writing, software
13// distributed under the License is distributed on an "AS IS" BASIS,
14// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15// See the License for the specific language governing permissions and
16// limitations under the License.
17
18//! Generic implementation of an extrinsic that has passed the verification
19//! stage.
20
21use crate::traits::{
22	self, Member, MaybeDisplay, SignedExtension, Dispatchable, DispatchInfoOf, PostDispatchInfoOf,
23	ValidateUnsigned,
24};
25use crate::transaction_validity::{TransactionValidity, TransactionSource};
26
27/// Definition of something that the external world might want to say; its
28/// existence implies that it has been checked and is good, particularly with
29/// regards to the signature.
30#[derive(PartialEq, Eq, Clone, tet_core::RuntimeDebug)]
31pub struct CheckedExtrinsic<AccountId, Call, Extra> {
32	/// Who this purports to be from and the number of extrinsics have come before
33	/// from the same signer, if anyone (note this is not a signature).
34	pub signed: Option<(AccountId, Extra)>,
35
36	/// The function that should be called.
37	pub function: Call,
38}
39
40impl<AccountId, Call, Extra, Origin> traits::Applyable for
41	CheckedExtrinsic<AccountId, Call, Extra>
42where
43	AccountId: Member + MaybeDisplay,
44	Call: Member + Dispatchable<Origin=Origin>,
45	Extra: SignedExtension<AccountId=AccountId, Call=Call>,
46	Origin: From<Option<AccountId>>,
47{
48	type Call = Call;
49
50	fn validate<U: ValidateUnsigned<Call = Self::Call>>(
51		&self,
52		// TODO [#5006;ToDr] should source be passed to `SignedExtension`s?
53		// Perhaps a change for 2.0 to avoid breaking too much APIs?
54		source: TransactionSource,
55		info: &DispatchInfoOf<Self::Call>,
56		len: usize,
57	) -> TransactionValidity {
58		if let Some((ref id, ref extra)) = self.signed {
59			Extra::validate(extra, id, &self.function, info, len)
60		} else {
61			let valid = Extra::validate_unsigned(&self.function, info, len)?;
62			let unsigned_validation = U::validate_unsigned(source, &self.function)?;
63			Ok(valid.combine_with(unsigned_validation))
64		}
65	}
66
67	fn apply<U: ValidateUnsigned<Call=Self::Call>>(
68		self,
69		info: &DispatchInfoOf<Self::Call>,
70		len: usize,
71	) -> crate::ApplyExtrinsicResultWithInfo<PostDispatchInfoOf<Self::Call>> {
72		let (maybe_who, pre) = if let Some((id, extra)) = self.signed {
73			let pre = Extra::pre_dispatch(extra, &id, &self.function, info, len)?;
74			(Some(id), pre)
75		} else {
76			let pre = Extra::pre_dispatch_unsigned(&self.function, info, len)?;
77			U::pre_dispatch(&self.function)?;
78			(None, pre)
79		};
80		let res = self.function.dispatch(Origin::from(maybe_who));
81		let post_info = match res {
82			Ok(info) => info,
83			Err(err) => err.post_info,
84		};
85		Extra::post_dispatch(pre, info, &post_info, len, &res.map(|_| ()).map_err(|e| e.error))?;
86		Ok(res)
87	}
88}
tp_runtime/generic/checked_extrinsic.rs

tp_runtime/generic/
checked_extrinsic.rs
