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
use std::sync::{Arc, Weak};
use transient_hashmap::TransientHashMap;
use util::{U256, Mutex};
use ethcore::account_provider::AccountProvider;
use ethcore::miner::MinerService;
use ethcore::client::MiningBlockChainClient;
use futures::{self, BoxFuture, Future};
use jsonrpc_core::Error;
use v1::helpers::{
errors, dispatch,
DefaultAccount,
SigningQueue, ConfirmationPromise, ConfirmationResult, ConfirmationPayload, SignerService
};
use v1::metadata::Metadata;
use v1::traits::{EthSigning, ParitySigning};
use v1::types::{
H160 as RpcH160, H256 as RpcH256, U256 as RpcU256, Bytes as RpcBytes, H520 as RpcH520,
Either as RpcEither,
RichRawTransaction as RpcRichRawTransaction,
TransactionRequest as RpcTransactionRequest,
ConfirmationPayload as RpcConfirmationPayload,
ConfirmationResponse as RpcConfirmationResponse
};
const MAX_PENDING_DURATION: u64 = 60 * 60;
enum DispatchResult {
Promise(ConfirmationPromise),
Value(RpcConfirmationResponse),
}
pub struct SigningQueueClient<C, M> where C: MiningBlockChainClient, M: MinerService {
signer: Weak<SignerService>,
accounts: Weak<AccountProvider>,
client: Weak<C>,
miner: Weak<M>,
pending: Mutex<TransientHashMap<U256, ConfirmationPromise>>,
}
impl<C, M> SigningQueueClient<C, M> where
C: MiningBlockChainClient,
M: MinerService,
{
pub fn new(signer: &Arc<SignerService>, client: &Arc<C>, miner: &Arc<M>, accounts: &Arc<AccountProvider>) -> Self {
SigningQueueClient {
signer: Arc::downgrade(signer),
accounts: Arc::downgrade(accounts),
client: Arc::downgrade(client),
miner: Arc::downgrade(miner),
pending: Mutex::new(TransientHashMap::new(MAX_PENDING_DURATION)),
}
}
fn active(&self) -> Result<(), Error> {
take_weak!(self.client).keep_alive();
Ok(())
}
fn handle_dispatch<OnResponse>(&self, res: Result<DispatchResult, Error>, on_response: OnResponse)
where OnResponse: FnOnce(Result<RpcConfirmationResponse, Error>) + Send + 'static
{
match res {
Ok(DispatchResult::Value(result)) => on_response(Ok(result)),
Ok(DispatchResult::Promise(promise)) => {
promise.wait_for_result(move |result| {
on_response(result.unwrap_or_else(|| Err(errors::request_rejected())))
})
},
Err(e) => on_response(Err(e)),
}
}
fn add_to_queue(&self, payload: ConfirmationPayload) -> Result<DispatchResult, Error> {
let client = take_weak!(self.client);
let miner = take_weak!(self.miner);
let accounts = take_weak!(self.accounts);
let sender = payload.sender();
if accounts.is_unlocked(sender) {
return dispatch::execute(&*client, &*miner, &*accounts, payload, dispatch::SignWith::Nothing)
.map(|v| v.into_value())
.map(DispatchResult::Value);
}
take_weak!(self.signer).add_request(payload)
.map(DispatchResult::Promise)
.map_err(|_| errors::request_rejected_limit())
}
fn dispatch(&self, payload: RpcConfirmationPayload, default_account: DefaultAccount) -> Result<DispatchResult, Error> {
let client = take_weak!(self.client);
let miner = take_weak!(self.miner);
let default_account = match default_account {
DefaultAccount::Provided(acc) => acc,
DefaultAccount::ForDapp(dapp) => take_weak!(self.accounts).default_address(dapp).ok().unwrap_or_default(),
};
let payload = dispatch::from_rpc(payload, default_account, &*client, &*miner);
self.add_to_queue(payload)
}
}
impl<C: 'static, M: 'static> ParitySigning for SigningQueueClient<C, M> where
C: MiningBlockChainClient,
M: MinerService,
{
type Metadata = Metadata;
fn post_sign(&self, address: RpcH160, data: RpcBytes) -> Result<RpcEither<RpcU256, RpcConfirmationResponse>, Error> {
self.active()?;
self.dispatch(RpcConfirmationPayload::Signature((address.clone(), data).into()), DefaultAccount::Provided(address.into()))
.map(|result| match result {
DispatchResult::Value(v) => RpcEither::Or(v),
DispatchResult::Promise(promise) => {
let id = promise.id();
self.pending.lock().insert(id, promise);
RpcEither::Either(id.into())
},
})
}
fn post_transaction(&self, meta: Metadata, request: RpcTransactionRequest) -> BoxFuture<RpcEither<RpcU256, RpcConfirmationResponse>, Error> {
let post_transaction = move || {
self.active()?;
self.dispatch(RpcConfirmationPayload::SendTransaction(request), meta.into())
.map(|result| match result {
DispatchResult::Value(v) => RpcEither::Or(v),
DispatchResult::Promise(promise) => {
let id = promise.id();
self.pending.lock().insert(id, promise);
RpcEither::Either(id.into())
},
})
};
futures::done(post_transaction()).boxed()
}
fn check_request(&self, id: RpcU256) -> Result<Option<RpcConfirmationResponse>, Error> {
self.active()?;
let mut pending = self.pending.lock();
let id: U256 = id.into();
let res = match pending.get(&id) {
Some(ref promise) => match promise.result() {
ConfirmationResult::Waiting => { return Ok(None); }
ConfirmationResult::Rejected => Err(errors::request_rejected()),
ConfirmationResult::Confirmed(rpc_response) => rpc_response.map(Some),
},
_ => { return Err(errors::request_not_found()); }
};
pending.remove(&id);
res
}
fn decrypt_message(&self, address: RpcH160, data: RpcBytes) -> BoxFuture<RpcBytes, Error> {
let res = self.active()
.and_then(|_| self.dispatch(RpcConfirmationPayload::Decrypt((address.clone(), data).into()), address.into()));
let (ready, p) = futures::oneshot();
self.handle_dispatch(res, |response| {
match response {
Ok(RpcConfirmationResponse::Decrypt(data)) => ready.complete(Ok(data)),
Err(e) => ready.complete(Err(e)),
e => ready.complete(Err(errors::internal("Unexpected result.", e))),
}
});
p.then(|result| futures::done(result.expect("Ready is never dropped nor canceled."))).boxed()
}
}
impl<C: 'static, M: 'static> EthSigning for SigningQueueClient<C, M> where
C: MiningBlockChainClient,
M: MinerService,
{
type Metadata = Metadata;
fn sign(&self, address: RpcH160, data: RpcBytes) -> BoxFuture<RpcH520, Error> {
let res = self.active()
.and_then(|_| self.dispatch(RpcConfirmationPayload::Signature((address.clone(), data).into()), address.into()));
let (ready, p) = futures::oneshot();
self.handle_dispatch(res, |response| {
match response {
Ok(RpcConfirmationResponse::Signature(signature)) => ready.complete(Ok(signature)),
Err(e) => ready.complete(Err(e)),
e => ready.complete(Err(errors::internal("Unexpected result.", e))),
}
});
p.then(|result| futures::done(result.expect("Ready is never dropped nor canceled."))).boxed()
}
fn send_transaction(&self, meta: Metadata, request: RpcTransactionRequest) -> BoxFuture<RpcH256, Error> {
let res = self.active()
.and_then(|_| self.dispatch(RpcConfirmationPayload::SendTransaction(request), meta.into()));
let (ready, p) = futures::oneshot();
self.handle_dispatch(res, |response| {
match response {
Ok(RpcConfirmationResponse::SendTransaction(hash)) => ready.complete(Ok(hash)),
Err(e) => ready.complete(Err(e)),
e => ready.complete(Err(errors::internal("Unexpected result.", e))),
}
});
p.then(|result| futures::done(result.expect("Ready is never dropped nor canceled."))).boxed()
}
fn sign_transaction(&self, meta: Metadata, request: RpcTransactionRequest) -> BoxFuture<RpcRichRawTransaction, Error> {
let res = self.active().and_then(|_| self.dispatch(RpcConfirmationPayload::SignTransaction(request), meta.into()));
let (ready, p) = futures::oneshot();
self.handle_dispatch(res, |response| {
match response {
Ok(RpcConfirmationResponse::SignTransaction(tx)) => ready.complete(Ok(tx)),
Err(e) => ready.complete(Err(e)),
e => ready.complete(Err(errors::internal("Unexpected result.", e))),
}
});
p.then(|result| futures::done(result.expect("Ready is never dropped nor canceled."))).boxed()
}
}