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Take in account zero gas price certification when doing transact_contract (#10232)

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* Tx permission contract improvement

* Take in account zero gas price certification when doing transact_contract

* DRY in ServiceTransactionChecker

* Fix typos and regroup mod

* Fix imports

* Simplify code in struct instantiation

Co-Authored-By: VladLupashevskyi <vlad@lupashevskyi.com>
This commit is contained in:
Vladyslav Lupashevskyi
2019-01-28 11:58:34 +02:00
committed by Afri Schoedon
parent 38f3747cde
commit 94db961975
3 changed files with 19 additions and 11 deletions
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18
miner/src/service_transaction_checker.rs
View File

@@ -20,6 +20,7 @@ use call_contract::{CallContract, RegistryInfo};
use types::ids::BlockId;
use types::transaction::SignedTransaction;
use ethabi::FunctionOutputDecoder;
use ethereum_types::Address;
use_contract!(service_transaction, "res/contracts/service_transaction.json");
@@ -30,23 +31,24 @@ const SERVICE_TRANSACTION_CONTRACT_REGISTRY_NAME: &'static str = "service_transa
pub struct ServiceTransactionChecker;
impl ServiceTransactionChecker {
/// Checks if given address is whitelisted to send service transactions.
/// Checks if given address in tx is whitelisted to send service transactions.
pub fn check<C: CallContract + RegistryInfo>(&self, client: &C, tx: &SignedTransaction) -> Result<bool, String> {
let sender = tx.sender();
let hash = tx.hash();
// Skip checking the contract if the transaction does not have zero gas price
if !tx.gas_price.is_zero() {
return Ok(false)
}
let address = client.registry_address(SERVICE_TRANSACTION_CONTRACT_REGISTRY_NAME.to_owned(), BlockId::Latest)
self.check_address(client, sender)
}
/// Checks if given address is whitelisted to send service transactions.
pub fn check_address<C: CallContract + RegistryInfo>(&self, client: &C, sender: Address) -> Result<bool, String> {
let contract_address = client.registry_address(SERVICE_TRANSACTION_CONTRACT_REGISTRY_NAME.to_owned(), BlockId::Latest)
.ok_or_else(|| "contract is not configured")?;
trace!(target: "txqueue", "[{:?}] Checking service transaction checker contract from {}", hash, sender);
trace!(target: "txqueue", "Checking service transaction checker contract from {}", sender);
let (data, decoder) = service_transaction::functions::certified::call(sender);
let value = client.call_contract(BlockId::Latest, address, data)?;
let value = client.call_contract(BlockId::Latest, contract_address, data)?;
decoder.decode(&value).map_err(|e| e.to_string())
}
}