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
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
// This file is part of Substrate.

// Copyright (C) 2017-2020 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Testing utilities.

use serde::{Serialize, Serializer, Deserialize, de::Error as DeError, Deserializer};
use std::{fmt::{self, Debug}, ops::Deref, cell::RefCell};
use crate::codec::{Codec, Encode, Decode};
use crate::traits::{
	self, Checkable, Applyable, BlakeTwo256, OpaqueKeys,
	SignedExtension, Dispatchable, DispatchInfoOf, PostDispatchInfoOf,
};
use crate::traits::ValidateUnsigned;
use crate::{generic, KeyTypeId, CryptoTypeId, ApplyExtrinsicResultWithInfo};
pub use sp_core::{H256, sr25519};
use sp_core::{crypto::{CryptoType, Dummy, key_types, Public}, U256};
use crate::transaction_validity::{TransactionValidity, TransactionValidityError, TransactionSource};

/// A dummy type which can be used instead of regular cryptographic primitives.
///
/// 1. Wraps a `u64` `AccountId` and is able to `IdentifyAccount`.
/// 2. Can be converted to any `Public` key.
/// 3. Implements `RuntimeAppPublic` so it can be used instead of regular application-specific
///    crypto.
#[derive(Default, PartialEq, Eq, Clone, Encode, Decode, Debug, Hash, Serialize, Deserialize, PartialOrd, Ord)]
pub struct UintAuthorityId(pub u64);

impl From<u64> for UintAuthorityId {
	fn from(id: u64) -> Self {
		UintAuthorityId(id)
	}
}

impl From<UintAuthorityId> for u64 {
	fn from(id: UintAuthorityId) -> u64 {
		id.0
	}
}

impl UintAuthorityId {
	/// Convert this authority id into a public key.
	pub fn to_public_key<T: Public>(&self) -> T {
		let bytes: [u8; 32] = U256::from(self.0).into();
		T::from_slice(&bytes)
	}
}

impl CryptoType for UintAuthorityId {
	type Pair = Dummy;
}

impl AsRef<[u8]> for UintAuthorityId {
	fn as_ref(&self) -> &[u8] {
		// Unsafe, i know, but it's test code and it's just there because it's really convenient to
		// keep `UintAuthorityId` as a u64 under the hood.
		unsafe {
			std::slice::from_raw_parts(&self.0 as *const u64 as *const _, std::mem::size_of::<u64>())
		}
	}
}

thread_local! {
	/// A list of all UintAuthorityId keys returned to the runtime.
	static ALL_KEYS: RefCell<Vec<UintAuthorityId>> = RefCell::new(vec![]);
}

impl UintAuthorityId {
	/// Set the list of keys returned by the runtime call for all keys of that type.
	pub fn set_all_keys<T: Into<UintAuthorityId>>(keys: impl IntoIterator<Item=T>) {
		ALL_KEYS.with(|l| *l.borrow_mut() = keys.into_iter().map(Into::into).collect())
	}
}

impl sp_application_crypto::RuntimeAppPublic for UintAuthorityId {
	const ID: KeyTypeId = key_types::DUMMY;
	const CRYPTO_ID: CryptoTypeId = CryptoTypeId(*b"dumm");

	type Signature = TestSignature;

	fn all() -> Vec<Self> {
		ALL_KEYS.with(|l| l.borrow().clone())
	}

	fn generate_pair(_: Option<Vec<u8>>) -> Self {
		use rand::RngCore;
		UintAuthorityId(rand::thread_rng().next_u64())
	}

	fn sign<M: AsRef<[u8]>>(&self, msg: &M) -> Option<Self::Signature> {
		Some(TestSignature(self.0, msg.as_ref().to_vec()))
	}

	fn verify<M: AsRef<[u8]>>(&self, msg: &M, signature: &Self::Signature) -> bool {
		traits::Verify::verify(signature, msg.as_ref(), &self.0)
	}

	fn to_raw_vec(&self) -> Vec<u8> {
		AsRef::<[u8]>::as_ref(self).to_vec()
	}
}

impl OpaqueKeys for UintAuthorityId {
	type KeyTypeIdProviders = ();

	fn key_ids() -> &'static [KeyTypeId] {
		&[key_types::DUMMY]
	}

	fn get_raw(&self, _: KeyTypeId) -> &[u8] {
		self.as_ref()
	}

	fn get<T: Decode>(&self, _: KeyTypeId) -> Option<T> {
		self.using_encoded(|mut x| T::decode(&mut x)).ok()
	}
}

impl crate::BoundToRuntimeAppPublic for UintAuthorityId {
	type Public = Self;
}

impl traits::IdentifyAccount for UintAuthorityId {
	type AccountId = u64;

	fn into_account(self) -> Self::AccountId {
		self.0
	}
}

/// A dummy signature type, to match `UintAuthorityId`.
#[derive(Eq, PartialEq, Clone, Debug, Hash, Serialize, Deserialize, Encode, Decode)]
pub struct TestSignature(pub u64, pub Vec<u8>);

impl traits::Verify for TestSignature {
	type Signer = UintAuthorityId;

	fn verify<L: traits::Lazy<[u8]>>(&self, mut msg: L, signer: &u64) -> bool {
		signer == &self.0 && msg.get() == &self.1[..]
	}
}

/// Digest item
pub type DigestItem = generic::DigestItem<H256>;

/// Header Digest
pub type Digest = generic::Digest<H256>;

/// Block Header
pub type Header = generic::Header<u64, BlakeTwo256>;

impl Header {
	/// A new header with the given number and default hash for all other fields.
	pub fn new_from_number(number: <Self as traits::Header>::Number) -> Self {
		Self {
			number,
			extrinsics_root: Default::default(),
			state_root: Default::default(),
			parent_hash: Default::default(),
			digest: Default::default(),
		}
	}
}

/// An opaque extrinsic wrapper type.
#[derive(PartialEq, Eq, Clone, Debug, Encode, Decode, parity_util_mem::MallocSizeOf)]
pub struct ExtrinsicWrapper<Xt>(Xt);

impl<Xt> traits::Extrinsic for ExtrinsicWrapper<Xt>
where Xt: parity_util_mem::MallocSizeOf
{
	type Call = ();
	type SignaturePayload = ();

	fn is_signed(&self) -> Option<bool> {
		None
	}
}

impl<Xt: Encode> serde::Serialize for ExtrinsicWrapper<Xt> {
	fn serialize<S>(&self, seq: S) -> Result<S::Ok, S::Error> where S: ::serde::Serializer {
		self.using_encoded(|bytes| seq.serialize_bytes(bytes))
	}
}

impl<Xt> From<Xt> for ExtrinsicWrapper<Xt> {
	fn from(xt: Xt) -> Self {
		ExtrinsicWrapper(xt)
	}
}

impl<Xt> Deref for ExtrinsicWrapper<Xt> {
	type Target = Xt;

	fn deref(&self) -> &Self::Target {
		&self.0
	}
}

/// Testing block
#[derive(PartialEq, Eq, Clone, Serialize, Debug, Encode, Decode, parity_util_mem::MallocSizeOf)]
pub struct Block<Xt> {
	/// Block header
	pub header: Header,
	/// List of extrinsics
	pub extrinsics: Vec<Xt>,
}

impl<Xt: 'static + Codec + Sized + Send + Sync + Serialize + Clone + Eq + Debug + traits::Extrinsic> traits::Block
	for Block<Xt>
{
	type Extrinsic = Xt;
	type Header = Header;
	type Hash = <Header as traits::Header>::Hash;

	fn header(&self) -> &Self::Header {
		&self.header
	}
	fn extrinsics(&self) -> &[Self::Extrinsic] {
		&self.extrinsics[..]
	}
	fn deconstruct(self) -> (Self::Header, Vec<Self::Extrinsic>) {
		(self.header, self.extrinsics)
	}
	fn new(header: Self::Header, extrinsics: Vec<Self::Extrinsic>) -> Self {
		Block { header, extrinsics }
	}
	fn encode_from(header: &Self::Header, extrinsics: &[Self::Extrinsic]) -> Vec<u8> {
		(header, extrinsics).encode()
	}
}

impl<'a, Xt> Deserialize<'a> for Block<Xt> where Block<Xt>: Decode {
	fn deserialize<D: Deserializer<'a>>(de: D) -> Result<Self, D::Error> {
		let r = <Vec<u8>>::deserialize(de)?;
		Decode::decode(&mut &r[..])
			.map_err(|e| DeError::custom(format!("Invalid value passed into decode: {}", e.what())))
	}
}

/// Test transaction, tuple of (sender, call, signed_extra)
/// with index only used if sender is some.
///
/// If sender is some then the transaction is signed otherwise it is unsigned.
#[derive(PartialEq, Eq, Clone, Encode, Decode)]
pub struct TestXt<Call, Extra> {
	/// Signature of the extrinsic.
	pub signature: Option<(u64, Extra)>,
	/// Call of the extrinsic.
	pub call: Call,
}

impl<Call, Extra> TestXt<Call, Extra> {
	/// Create a new `TextXt`.
	pub fn new(call: Call, signature: Option<(u64, Extra)>) -> Self {
		Self { call, signature }
	}
}

// Non-opaque extrinsics always 0.
parity_util_mem::malloc_size_of_is_0!(any: TestXt<Call, Extra>);

impl<Call, Extra> Serialize for TestXt<Call, Extra> where TestXt<Call, Extra>: Encode {
	fn serialize<S>(&self, seq: S) -> Result<S::Ok, S::Error> where S: Serializer {
		self.using_encoded(|bytes| seq.serialize_bytes(bytes))
	}
}

impl<Call, Extra> Debug for TestXt<Call, Extra> {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		write!(f, "TestXt({:?}, ...)", self.signature.as_ref().map(|x| &x.0))
	}
}

impl<Call: Codec + Sync + Send, Context, Extra> Checkable<Context> for TestXt<Call, Extra> {
	type Checked = Self;
	fn check(self, _: &Context) -> Result<Self::Checked, TransactionValidityError> { Ok(self) }
}

impl<Call: Codec + Sync + Send, Extra> traits::Extrinsic for TestXt<Call, Extra> {
	type Call = Call;
	type SignaturePayload = (u64, Extra);

	fn is_signed(&self) -> Option<bool> {
		Some(self.signature.is_some())
	}

	fn new(c: Call, sig: Option<Self::SignaturePayload>) -> Option<Self> {
		Some(TestXt { signature: sig, call: c })
	}
}

impl<Origin, Call, Extra> Applyable for TestXt<Call, Extra> where
	Call: 'static + Sized + Send + Sync + Clone + Eq + Codec + Debug + Dispatchable<Origin=Origin>,
	Extra: SignedExtension<AccountId=u64, Call=Call>,
	Origin: From<Option<u64>>,
{
	type Call = Call;

	/// Checks to see if this is a valid *transaction*. It returns information on it if so.
	fn validate<U: ValidateUnsigned<Call=Self::Call>>(
		&self,
		_source: TransactionSource,
		_info: &DispatchInfoOf<Self::Call>,
		_len: usize,
	) -> TransactionValidity {
		Ok(Default::default())
	}

	/// Executes all necessary logic needed prior to dispatch and deconstructs into function call,
	/// index and sender.
	fn apply<U: ValidateUnsigned<Call=Self::Call>>(
		self,
		info: &DispatchInfoOf<Self::Call>,
		len: usize,
	) -> ApplyExtrinsicResultWithInfo<PostDispatchInfoOf<Self::Call>> {
		let maybe_who = if let Some((who, extra)) = self.signature {
			Extra::pre_dispatch(extra, &who, &self.call, info, len)?;
			Some(who)
		} else {
			Extra::pre_dispatch_unsigned(&self.call, info, len)?;
			None
		};

		Ok(self.call.dispatch(maybe_who.into()))
	}
}