arbos/filtered_transactions/
mod.rs

1use alloy_primitives::B256;
2use revm::Database;
3
4use arb_storage::Storage;
5
6const PRESENT_HASH: B256 = {
7    let mut bytes = [0u8; 32];
8    bytes[31] = 1;
9    B256::new(bytes)
10};
11
12/// Tracks transaction hashes that have been filtered (censored/blocked).
13pub struct FilteredTransactionsState<D> {
14    store: Storage<D>,
15}
16
17impl<D: Database> FilteredTransactionsState<D> {
18    pub fn open(sto: Storage<D>) -> Self {
19        Self { store: sto }
20    }
21
22    pub fn add(&self, tx_hash: B256) -> Result<(), ()> {
23        self.store.set(tx_hash, PRESENT_HASH)
24    }
25
26    pub fn delete(&self, tx_hash: B256) -> Result<(), ()> {
27        self.store.set(tx_hash, B256::ZERO)
28    }
29
30    pub fn is_filtered(&self, tx_hash: B256) -> Result<bool, ()> {
31        let value = self.store.get(tx_hash)?;
32        Ok(value == PRESENT_HASH)
33    }
34
35    /// Check if a tx is filtered without charging gas.
36    pub fn is_filtered_free(&self, tx_hash: B256) -> bool {
37        self.store
38            .get(tx_hash)
39            .map(|v| v == PRESENT_HASH)
40            .unwrap_or(false)
41    }
42
43    /// Delete a tx hash without charging gas (cleanup after no-op execution).
44    pub fn delete_free(&self, tx_hash: B256) {
45        let _ = self.store.set(tx_hash, B256::ZERO);
46    }
47}
arbos/filtered_transactions/mod.rs

arbos/filtered_transactions/
mod.rs
