openethereum/rpc/src/v1/helpers/dispatch.rs

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// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use util::{Address, H256, U256, Uint};
use util::bytes::ToPretty;
use ethcore::miner::MinerService;
use ethcore::client::MiningBlockChainClient;
use ethcore::transaction::{Action, SignedTransaction, Transaction};
use ethcore::account_provider::AccountProvider;
use jsonrpc_core::{Error, Value, to_value};
use v1::helpers::TransactionRequest;
use v1::types::{H256 as RpcH256, H520 as RpcH520};
use v1::helpers::errors;
fn prepare_transaction<C, M>(client: &C, miner: &M, request: TransactionRequest) -> Transaction where C: MiningBlockChainClient, M: MinerService {
Transaction {
nonce: request.nonce
.or_else(|| miner
.last_nonce(&request.from)
.map(|nonce| nonce + U256::one()))
.unwrap_or_else(|| client.latest_nonce(&request.from)),
action: request.to.map_or(Action::Create, Action::Call),
gas: request.gas.unwrap_or_else(|| miner.sensible_gas_limit()),
gas_price: request.gas_price.unwrap_or_else(|| default_gas_price(client, miner)),
value: request.value.unwrap_or_else(U256::zero),
data: request.data.map_or_else(Vec::new, |b| b.to_vec()),
}
}
pub fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedTransaction) -> Result<Value, Error>
where C: MiningBlockChainClient, M: MinerService {
let hash = RpcH256::from(signed_transaction.hash());
let import = miner.import_own_transaction(client, signed_transaction);
import
.map_err(errors::from_transaction_error)
.map(|_| to_value(&hash))
}
pub fn signature_with_password(accounts: &AccountProvider, address: Address, hash: H256, pass: String) -> Result<Value, Error> {
accounts.sign_with_password(address, pass, hash)
.map_err(errors::from_password_error)
.map(|hash| to_value(&RpcH520::from(hash)))
}
pub fn unlock_sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, account_provider: &AccountProvider, password: String) -> Result<Value, Error>
where C: MiningBlockChainClient, M: MinerService {
let address = request.from;
let signed_transaction = {
let t = prepare_transaction(client, miner, request);
let hash = t.hash();
let signature = try!(account_provider.sign_with_password(address, password, hash).map_err(errors::from_password_error));
t.with_signature(signature)
};
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trace!(target: "miner", "send_transaction: dispatching tx: {}", ::rlp::encode(&signed_transaction).to_vec().pretty());
dispatch_transaction(&*client, &*miner, signed_transaction)
}
pub fn sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, account_provider: &AccountProvider, address: Address) -> Result<Value, Error>
where C: MiningBlockChainClient, M: MinerService {
let signed_transaction = {
let t = prepare_transaction(client, miner, request);
let hash = t.hash();
let signature = try!(account_provider.sign(address, hash).map_err(errors::from_signing_error));
t.with_signature(signature)
};
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trace!(target: "miner", "send_transaction: dispatching tx: {}", ::rlp::encode(&signed_transaction).to_vec().pretty());
dispatch_transaction(&*client, &*miner, signed_transaction)
}
pub fn default_gas_price<C, M>(client: &C, miner: &M) -> U256 where C: MiningBlockChainClient, M: MinerService {
client
.gas_price_statistics(100, 8)
.map(|x| x[4])
.unwrap_or_else(|_| miner.sensible_gas_price())
}