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clear_payloads func #551

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merged 8 commits into from
Apr 9, 2024
Merged

clear_payloads func #551

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ec85056
clear_payloads func
volovyks Apr 1, 2024
971fae8
reset counter
volovyks Apr 2, 2024
e3d43ea
typo
volovyks Apr 2, 2024
89c72b3
clippy
volovyks Apr 2, 2024
d0ef151
added add_signature in the contract
volovyks Apr 3, 2024
1c44ac5
gas check in the contract
volovyks Apr 3, 2024
81188fd
develop
volovyks Apr 3, 2024
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comment
volovyks Apr 3, 2024
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40 changes: 25 additions & 15 deletions contract/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -368,7 +368,7 @@ impl MpcContract {
s
);
if self.pending_requests.contains_key(&payload) {
self.pending_requests.insert(&payload, &Some((big_r, s)));
self.add_request(&payload, &Some((big_r, s)))
}
} else {
env::panic_str("only participants can respond");
Expand All @@ -378,20 +378,6 @@ impl MpcContract {
}
}

#[private]
#[init(ignore_state)]
pub fn clean(keys: Vec<near_sdk::json_types::Base64VecU8>) -> Self {
log!("clean: keys={:?}", keys);
for key in keys.iter() {
env::storage_remove(&key.0);
}
Self {
protocol_state: ProtocolContractState::NotInitialized,
pending_requests: LookupMap::new(b"m"),
request_counter: 0,
}
}

/// This is the root public key combined from all the public keys of the participants.
pub fn public_key(&self) -> PublicKey {
match &self.protocol_state {
Expand Down Expand Up @@ -423,4 +409,28 @@ impl MpcContract {
self.pending_requests.remove(payload);
self.request_counter -= 1;
}

// Helper functions
#[private]
#[init(ignore_state)]
pub fn clean(keys: Vec<near_sdk::json_types::Base64VecU8>) -> Self {
log!("clean: keys={:?}", keys);
for key in keys.iter() {
env::storage_remove(&key.0);
}
Self {
protocol_state: ProtocolContractState::NotInitialized,
pending_requests: LookupMap::new(b"m"),
request_counter: 0,
}
}

#[private]
pub fn clean_payloads(&mut self, payloads: Vec<[u8; 32]>, counter: u32) {
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@ppca ppca Apr 2, 2024 •
edited
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why specify the payloads instead of clearing all the requests in the pending_requests? is it because of LookupMap?

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@ppca ppca Apr 2, 2024 •
edited
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I've used

#[private]
    pub fn clean_payloads(&mut self) {
        log!("clean_payloads");
        self.pending_requests = LookupMap::new(b"m");
        self.request_counter = 0;
    }

to clean the payloads on dev for now.

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Ok, that is fine. But the old payloads are still there.
LookupMap can not clean its key-value pairs. It is optimized for storage and access speed.

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wait, why would the old payloads still be there? I thought self.pending_requests = LookupMap::new(b"m"); self.request_counter = 0; will reset it?

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This is how insert and remove works in LookupMap

    /// Inserts a serialized key-value pair into the map.
    /// If the map did not have this key present, `None` is returned. Otherwise returns
    /// a serialized value. Note, the keys that have the same hash value are undistinguished by
    /// the implementation.
    pub fn insert_raw(&mut self, key_raw: &[u8], value_raw: &[u8]) -> Option<Vec<u8>> {
        let storage_key = self.raw_key_to_storage_key(key_raw);
        if env::storage_write(&storage_key, value_raw) {
            Some(env::storage_get_evicted().unwrap())
        } else {
            None
        }
    }

    /// Removes a serialized key from the map, returning the serialized value at the key if the key
    /// was previously in the map.
    pub fn remove_raw(&mut self, key_raw: &[u8]) -> Option<Vec<u8>> {
        let storage_key = self.raw_key_to_storage_key(key_raw);
        if env::storage_remove(&storage_key) {
            Some(env::storage_get_evicted().unwrap())
        } else {
            None
        }
    }

LookupMap is not aware of its key-value pairs. They are stored directly on the contract memory which is also a map. The key for storing values is "LopkupMap prefix + provided key". It is not possible to clear the Lookup map without passing the keys.

log!("clean_payloads");
for payload in payloads.iter() {
self.pending_requests.remove(payload);
}
self.request_counter = counter;
}
}
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