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SecretStore: require N confirmations in PendingRequestsIterator

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This commit is contained in:
Svyatoslav Nikolsky 2017-12-20 17:05:32 +03:00
parent d7650e2b9c
commit b7a744be59
1 changed files with 33 additions and 24 deletions
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57
secret_store/src/listener/service_contract.rs
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@ -34,6 +34,9 @@ const SERVICE_CONTRACT_REGISTRY_NAME: &'static str = "secretstore_service";
/// Key server has been added to the set.
const SERVER_KEY_REQUESTED_EVENT_NAME: &'static [u8] = &*b"ServerKeyRequested(bytes32,uint256)";
/// Number of confirmations required before request can be processed.
const REQUEST_CONFIRMATIONS_REQUIRED: u64 = 3;
lazy_static! {
static ref SERVER_KEY_REQUESTED_EVENT_NAME_HASH: H256 = keccak(SERVER_KEY_REQUESTED_EVENT_NAME);
}
@ -72,6 +75,8 @@ struct PendingRequestsIterator {
contract: Arc<SecretStoreService>,
/// This node key pair.
self_key_pair: Arc<NodeKeyPair>,
/// Block, this iterator is created for.
block: H256,
/// Current request index.
index: U256,
/// Requests length.
@ -126,8 +131,7 @@ impl ServiceContract for OnChainServiceContract {
}
fn read_logs(&self, first_block: H256, last_block: H256) -> Box<Iterator<Item=Vec<H256>>> {
// already bound to specific blocks => do not care about trust here
let client = match self.client.get_untrusted() {
let client = match self.client.get() {
Some(client) => client,
None => {
warn!(target: "secretstore", "{}: client is offline during read_pending_requests call",
@ -165,27 +169,32 @@ impl ServiceContract for OnChainServiceContract {
};
let contract = self.contract.read();
let length = match contract.address == Default::default() {
true => 0.into(),
false => {
let do_call = |a, d| future::done(client.call_contract(BlockId::Latest, a, d));
contract.server_key_generation_requests_count(&do_call).wait()
.map_err(|error| {
warn!(target: "secretstore", "{}: call to server_key_generation_requests_count failed: {}",
self.self_key_pair.public(), error);
error
})
.unwrap_or_default()
},
};
Box::new(PendingRequestsIterator {
client: client,
contract: contract.clone(),
self_key_pair: self.self_key_pair.clone(),
index: 0.into(),
length: length,
})
match contract.address == Default::default() {
true => Box::new(::std::iter::empty()),
false => client.block_number(BlockId::Latest)
.and_then(|b| b.checked_sub(REQUEST_CONFIRMATIONS_REQUIRED))
.and_then(|b| client.block_hash(BlockId::Number(b)))
.and_then(|b| {
let do_call = |a, d| future::done(client.call_contract(BlockId::Hash(b.clone()), a, d));
contract.server_key_generation_requests_count(&do_call).wait()
.map_err(|error| {
warn!(target: "secretstore", "{}: call to server_key_generation_requests_count failed: {}",
self.self_key_pair.public(), error);
error
})
.map(|l| (b, l))
.ok()
})
.map(|(b, l)| Box::new(PendingRequestsIterator {
client: client,
contract: contract.clone(),
self_key_pair: self.self_key_pair.clone(),
block: b,
index: 0.into(),
length: l,
}) as Box<Iterator<Item=(bool, ServiceTask)>>)
.unwrap_or_else(|| Box::new(::std::iter::empty()))
}
}
fn publish_server_key(&self, server_key_id: &ServerKeyId, server_key: &Public) -> Result<(), String> {
@ -243,7 +252,7 @@ impl Iterator for PendingRequestsIterator {
self.index = self.index + 1.into();
let self_address = public_to_address(self.self_key_pair.public());
let do_call = |a, d| future::done(self.client.call_contract(BlockId::Latest, a, d));
let do_call = |a, d| future::done(self.client.call_contract(BlockId::Hash(self.block.clone()), a, d));
self.contract.get_server_key_id(&do_call, index).wait()
.and_then(|server_key_id|
self.contract.get_server_key_threshold(&do_call, server_key_id.clone()).wait()