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use std::sync::{Arc, Weak};
use rlp::{UntrustedRlp, View};
use ethcore::account_provider::AccountProvider;
use ethcore::client::MiningBlockChainClient;
use ethcore::transaction::{SignedTransaction, PendingTransaction};
use ethcore::miner::MinerService;
use jsonrpc_core::Error;
use v1::helpers::{errors, SignerService, SigningQueue, ConfirmationPayload};
use v1::helpers::dispatch::{self, dispatch_transaction, WithToken};
use v1::traits::Signer;
use v1::types::{TransactionModification, ConfirmationRequest, ConfirmationResponse, ConfirmationResponseWithToken, U256, Bytes};
pub struct SignerClient<C, M> where C: MiningBlockChainClient, M: MinerService {
signer: Weak<SignerService>,
accounts: Weak<AccountProvider>,
client: Weak<C>,
miner: Weak<M>,
}
impl<C: 'static, M: 'static> SignerClient<C, M> where C: MiningBlockChainClient, M: MinerService {
pub fn new(
store: &Arc<AccountProvider>,
client: &Arc<C>,
miner: &Arc<M>,
signer: &Arc<SignerService>,
) -> Self {
SignerClient {
signer: Arc::downgrade(signer),
accounts: Arc::downgrade(store),
client: Arc::downgrade(client),
miner: Arc::downgrade(miner),
}
}
fn active(&self) -> Result<(), Error> {
take_weak!(self.client).keep_alive();
Ok(())
}
fn confirm_internal<F>(&self, id: U256, modification: TransactionModification, f: F) -> Result<WithToken<ConfirmationResponse>, Error> where
F: FnOnce(&C, &M, &AccountProvider, ConfirmationPayload) -> Result<WithToken<ConfirmationResponse>, Error>,
{
self.active()?;
let id = id.into();
let accounts = take_weak!(self.accounts);
let signer = take_weak!(self.signer);
let client = take_weak!(self.client);
let miner = take_weak!(self.miner);
signer.peek(&id).map(|confirmation| {
let mut payload = confirmation.payload.clone();
if let ConfirmationPayload::SendTransaction(ref mut request) = payload {
if let Some(sender) = modification.sender.clone() {
request.from = sender.into();
request.nonce = None;
}
if let Some(gas_price) = modification.gas_price {
request.gas_price = gas_price.into();
}
if let Some(gas) = modification.gas {
request.gas = gas.into();
}
if let Some(ref min_block) = modification.min_block {
request.min_block = min_block.as_ref().and_then(|b| b.to_min_block_num());
}
}
let result = f(&*client, &*miner, &*accounts, payload);
if let Ok(ref response) = result {
signer.request_confirmed(id, Ok((*response).clone()));
}
result
}).unwrap_or_else(|| Err(errors::invalid_params("Unknown RequestID", id)))
}
}
impl<C: 'static, M: 'static> Signer for SignerClient<C, M> where C: MiningBlockChainClient, M: MinerService {
fn requests_to_confirm(&self) -> Result<Vec<ConfirmationRequest>, Error> {
self.active()?;
let signer = take_weak!(self.signer);
Ok(signer.requests()
.into_iter()
.map(Into::into)
.collect()
)
}
fn confirm_request(&self, id: U256, modification: TransactionModification, pass: String) -> Result<ConfirmationResponse, Error> {
self.confirm_internal(id, modification, move |client, miner, accounts, payload| {
dispatch::execute(client, miner, accounts, payload, dispatch::SignWith::Password(pass))
}).map(|v| v.into_value())
}
fn confirm_request_with_token(&self, id: U256, modification: TransactionModification, token: String) -> Result<ConfirmationResponseWithToken, Error> {
self.confirm_internal(id, modification, move |client, miner, accounts, payload| {
dispatch::execute(client, miner, accounts, payload, dispatch::SignWith::Token(token))
}).and_then(|v| match v {
WithToken::No(_) => Err(errors::internal("Unexpected response without token.", "")),
WithToken::Yes(response, token) => Ok(ConfirmationResponseWithToken {
result: response,
token: token,
}),
})
}
fn confirm_request_raw(&self, id: U256, bytes: Bytes) -> Result<ConfirmationResponse, Error> {
self.active()?;
let id = id.into();
let signer = take_weak!(self.signer);
let client = take_weak!(self.client);
let miner = take_weak!(self.miner);
signer.peek(&id).map(|confirmation| {
let result = match confirmation.payload {
ConfirmationPayload::SendTransaction(request) => {
let signed_transaction = UntrustedRlp::new(&bytes.0).as_val().map_err(errors::from_rlp_error)?;
let signed_transaction = SignedTransaction::new(signed_transaction).map_err(|e| errors::invalid_params("Invalid signature.", e))?;
let sender = signed_transaction.sender();
let sender_matches = sender == request.from;
let data_matches = signed_transaction.data == request.data;
let value_matches = signed_transaction.value == request.value;
let nonce_matches = match request.nonce {
Some(nonce) => signed_transaction.nonce == nonce,
None => true,
};
if sender_matches && data_matches && value_matches && nonce_matches {
let pending_transaction = PendingTransaction::new(signed_transaction, request.min_block);
dispatch_transaction(&*client, &*miner, pending_transaction)
.map(Into::into)
.map(ConfirmationResponse::SendTransaction)
} else {
let mut error = Vec::new();
if !sender_matches { error.push("from") }
if !data_matches { error.push("data") }
if !value_matches { error.push("value") }
if !nonce_matches { error.push("nonce") }
Err(errors::invalid_params("Sent transaction does not match the request.", error))
}
},
_ => Err(errors::unimplemented(Some("Non-transaction requests does not support RAW signing yet.".into()))),
};
if let Ok(ref response) = result {
signer.request_confirmed(id, Ok(response.clone()));
}
result
}).unwrap_or_else(|| Err(errors::invalid_params("Unknown RequestID", id)))
}
fn reject_request(&self, id: U256) -> Result<bool, Error> {
self.active()?;
let signer = take_weak!(self.signer);
let res = signer.request_rejected(id.into());
Ok(res.is_some())
}
fn generate_token(&self) -> Result<String, Error> {
self.active()?;
let signer = take_weak!(self.signer);
signer.generate_token()
.map_err(|e| errors::token(e))
}
fn generate_web_proxy_token(&self) -> Result<String, Error> {
try!(self.active());
let signer = take_weak!(self.signer);
Ok(signer.generate_web_proxy_access_token())
}
}