DI - shielded token

.changelog/unreleased/improvements/3466-di-shielded-token.md

@@ -0,0 +1,2 @@
+- Replaced cross-system dependencies in namada_shielded_token crate with
+  dependency-injection. ([\#3466](https://github.com/anoma/namada/pull/3466))

crates/node/src/bench_utils.rs

@@ -81,7 +81,7 @@ use namada_sdk::state::StorageRead;
 use namada_sdk::storage::testing::get_dummy_header;
 use namada_sdk::storage::{BlockHeight, Epoch, Key, KeySeg, TxIndex};
 use namada_sdk::time::DateTimeUtc;
-use namada_sdk::token::{Amount, DenominatedAmount, Transfer};
+use namada_sdk::token::{self, Amount, DenominatedAmount, Transfer};
 use namada_sdk::tx::data::pos::Bond;
 use namada_sdk::tx::data::{BatchedTxResult, Fee, TxResult, VpsResult};
 use namada_sdk::tx::event::{new_tx_event, Batch};
@@ -443,9 +443,11 @@ impl BenchShell {
             .is_masp_new_epoch(true, masp_epoch_multiplier)
             .unwrap()
         {
-            namada_sdk::token::conversion::update_allowed_conversions(
-                &mut self.state,
-            )
+            token::conversion::update_allowed_conversions::<
+                _,
+                parameters::Store<_>,
+                token::Store<_>,
+            >(&mut self.state)
             .unwrap();
         }
     }

crates/node/src/shell/finalize_block.rs

@@ -17,7 +17,9 @@ use namada_sdk::proof_of_stake::storage::{
     find_validator_by_raw_hash, write_last_block_proposer_address,
 };
 use namada_sdk::state::write_log::StorageModification;
-use namada_sdk::state::{ResultExt, StorageWrite, EPOCH_SWITCH_BLOCKS_DELAY};
+use namada_sdk::state::{
+    ResultExt, StorageResult, StorageWrite, EPOCH_SWITCH_BLOCKS_DELAY,
+};
 use namada_sdk::storage::{BlockResults, Epoch, Header};
 use namada_sdk::tx::data::protocol::ProtocolTxType;
 use namada_sdk::tx::data::VpStatusFlags;
@@ -102,7 +104,7 @@ where
             new_epoch,
         )?;
         // - Token
-        token::finalize_block(&mut self.state, emit_events, is_masp_new_epoch)?;
+        token_finalize_block(&mut self.state, emit_events, is_masp_new_epoch)?;
         // - PoS
         //    - Must be applied after governance in case it changes PoS params
         proof_of_stake::finalize_block(
@@ -1131,6 +1133,22 @@ fn pos_votes_from_abci(
         .collect()
 }
 
+/// Dependency-injection indirection for token system
+fn token_finalize_block<S>(
+    storage: &mut S,
+    events: &mut Vec<Event>,
+    is_new_masp_epoch: bool,
+) -> StorageResult<()>
+where
+    S: StorageWrite + StorageRead + token::WithConversionState,
+{
+    token::finalize_block::<S, parameters::Store<_>>(
+        storage,
+        events,
+        is_new_masp_epoch,
+    )
+}
+
 /// We test the failure cases of [`finalize_block`]. The happy flows
 /// are covered by the e2e tests.
 #[allow(clippy::arithmetic_side_effects, clippy::cast_possible_truncation)]

crates/node/src/storage/mod.rs

@@ -72,7 +72,7 @@ mod tests {
     use namada_sdk::storage::{BlockHeight, Key, KeySeg};
     use namada_sdk::token::conversion::update_allowed_conversions;
     use namada_sdk::{
-        address, decode, encode, parameters, storage, validation,
+        address, decode, encode, parameters, storage, token, validation,
     };
     use proptest::collection::vec;
     use proptest::prelude::*;
@@ -171,8 +171,10 @@ mod tests {
             .new_epoch(BlockHeight(100));
 
         // update conversion for a new epoch
-        update_allowed_conversions(&mut state)
-            .expect("update conversions failed");
+        update_allowed_conversions::<_, parameters::Store<_>, token::Store<_>>(
+            &mut state,
+        )
+        .expect("update conversions failed");
         state.commit_block().expect("commit failed");
 
         // save the last state and the storage

crates/parameters/src/lib.rs

@@ -64,6 +64,10 @@ where
     fn is_native_token_transferable(storage: &S) -> Result<bool> {
         storage::is_native_token_transferable(storage)
     }
+
+    fn epochs_per_year(storage: &S) -> Result<u64> {
+        read_epochs_per_year(storage)
+    }
 }
 
 impl<S> Write<S> for Store<S>
@@ -326,6 +330,18 @@ where
     Ok(gas_cost_table.get(token).map(|amount| amount.to_owned()))
 }
 
+/// Read the number of epochs per year parameter
+pub fn read_epochs_per_year<S>(storage: &S) -> namada_storage::Result<u64>
+where
+    S: StorageRead,
+{
+    let key = storage::get_epochs_per_year_key();
+    let epochs_per_year = storage.read(&key)?;
+    epochs_per_year
+        .ok_or(ReadError::ParametersMissing)
+        .into_storage_result()
+}
+
 /// Read all the parameters from storage. Returns the parameters and gas
 /// cost.
 pub fn read<S>(storage: &S) -> namada_storage::Result<Parameters>

crates/sdk/src/validation.rs

@@ -89,7 +89,7 @@ pub type MaspVp<'a, S, CA> = token::vp::MaspVp<
     ParamsPreStore<'a, S, CA>,
     GovPreStore<'a, S, CA>,
     IbcPostStore<'a, S, CA>,
-    TokenKeys,
+    TokenPreStore<'a, S, CA>,
 >;
 
 /// Native ETH bridge VP
@@ -117,6 +117,10 @@ pub type PosPreStore<'a, S, CA> = proof_of_stake::Store<
     CtxPreStorageRead<'a, 'a, S, VpCache<CA>, Eval<S, CA>>,
 >;
 
+/// Token store implementation over the native prior context
+pub type TokenPreStore<'a, S, CA> =
+    token::Store<CtxPreStorageRead<'a, 'a, S, VpCache<CA>, Eval<S, CA>>>;
+
 /// Ibc store implementation over the native posterior context
 pub type IbcPostStore<'a, S, CA> =
     ibc::Store<CtxPostStorageRead<'a, 'a, S, VpCache<CA>, Eval<S, CA>>>;

crates/shielded_token/Cargo.toml

@@ -27,11 +27,9 @@ namada_account = { path = "../account" }
 namada_controller = { path = "../controller" }
 namada_core = { path = "../core" }
 namada_gas = { path = "../gas" }
-namada_parameters = { path = "../parameters" }
 namada_state = { path = "../state" }
 namada_storage = { path = "../storage" }
 namada_systems = { path = "../systems" }
-namada_trans_token = { path = "../trans_token" }
 namada_tx = { path = "../tx" }
 namada_vp = { path = "../vp" }
 
@@ -53,6 +51,7 @@ namada_core = { path = "../core", features = ["testing"] }
 namada_gas = { path = "../gas" }
 namada_parameters = { path = "../parameters", features = ["testing"] }
 namada_storage = { path = "../storage", features = ["testing"] }
+namada_trans_token = { path = "../trans_token" }
 
 lazy_static.workspace = true
 masp_proofs = { workspace = true, features = ["download-params"] }