feat: add function to return wNEAR address

engine-tests/src/tests/xcc.rs

@@ -763,6 +763,9 @@ mod workspace {
             .await?;
         assert!(result.is_success());
 
+        let wnear_address = aurora.factory_get_wnear_address().await.unwrap().result;
+        assert_eq!(wnear_address, wnear_erc20.0.address);
+
         let approve_tx = wnear_erc20.approve(
             cross_contract_call::ADDRESS,
             WNEAR_AMOUNT.into(),

engine-workspace/src/contract.rs

@@ -9,10 +9,11 @@ use crate::operation::{
     CallSetKeyManager, CallSetPausedFlags, CallStageUpgrade, CallStateMigration,
     CallStorageDeposit, CallStorageUnregister, CallStorageWithdraw, CallSubmit, CallWithdraw,
     ViewAccountsCounter, ViewBalance, ViewBlockHash, ViewBridgeProver, ViewChainId, ViewCode,
-    ViewErc20FromNep141, ViewFtBalanceOf, ViewFtBalanceOfEth, ViewFtMetadata,
-    ViewFtTotalEthSupplyOnAurora, ViewFtTotalEthSupplyOnNear, ViewFtTotalSupply, ViewIsUsedProof,
-    ViewNep141FromErc20, ViewNonce, ViewOwner, ViewPausedFlags, ViewPausedPrecompiles,
-    ViewStorageAt, ViewStorageBalanceOf, ViewUpgradeIndex, ViewVersion, ViewView,
+    ViewErc20FromNep141, ViewFactoryWnearAddress, ViewFtBalanceOf, ViewFtBalanceOfEth,
+    ViewFtMetadata, ViewFtTotalEthSupplyOnAurora, ViewFtTotalEthSupplyOnNear, ViewFtTotalSupply,
+    ViewIsUsedProof, ViewNep141FromErc20, ViewNonce, ViewOwner, ViewPausedFlags,
+    ViewPausedPrecompiles, ViewStorageAt, ViewStorageBalanceOf, ViewUpgradeIndex, ViewVersion,
+    ViewView,
 };
 use crate::transaction::{CallTransaction, ViewTransaction};
 use aurora_engine_types::account_id::AccountId;
@@ -390,6 +391,10 @@ impl EngineContract {
     pub fn get_accounts_counter(&self) -> ViewAccountsCounter {
         ViewAccountsCounter::view(&self.contract)
     }
+
+    pub fn factory_get_wnear_address(&self) -> ViewFactoryWnearAddress {
+        ViewFactoryWnearAddress::view(&self.contract)
+    }
 }
 
 #[derive(Debug, Clone)]

engine-workspace/src/operation.rs

@@ -78,7 +78,8 @@ impl_view_return![
     (ViewErc20FromNep141 => Address, View::Erc20FromNep141, borsh),
     (ViewNep141FromErc20 => AccountId, View::Nep141FromErc20, borsh),
     (ViewPausedFlags => u8, View::PausedFlags, borsh),
-    (ViewAccountsCounter => u64, View::AccountsCounter, borsh)
+    (ViewAccountsCounter => u64, View::AccountsCounter, borsh),
+    (ViewFactoryWnearAddress => Address, View::FactoryWnearAddress, borsh)
 ];
 
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -181,6 +182,7 @@ pub enum View {
     Erc20FromNep141,
     Nep141FromErc20,
     AccountsCounter,
+    FactoryWnearAddress,
 }
 
 impl AsRef<str> for View {
@@ -210,6 +212,7 @@ impl AsRef<str> for View {
             View::Erc20FromNep141 => "get_erc20_from_nep141",
             View::Nep141FromErc20 => "get_nep141_from_erc20",
             View::AccountsCounter => "get_accounts_counter",
+            View::FactoryWnearAddress => "factory_get_wnear_address",
         }
     }
 }

engine/src/lib.rs

@@ -498,6 +498,15 @@ mod contract {
         crate::xcc::set_wnear_address(&mut io, &Address::from_array(address));
     }
 
+    /// Returns the address for the `wNEAR` ERC-20 contract in borsh format.
+    #[no_mangle]
+    pub extern "C" fn factory_get_wnear_address() {
+        let mut io = Runtime;
+        let address = aurora_engine_precompiles::xcc::state::get_wnear_address(&io);
+        let bytes = address.try_to_vec().sdk_expect(errors::ERR_SERIALIZE);
+        io.return_output(&bytes);
+    }
+
     /// Create and/or fund an XCC sub-account directly (as opposed to having one be automatically
     /// created via the XCC precompile in the EVM). The purpose of this method is to enable
     /// XCC on engine instances where wrapped NEAR (WNEAR) is not bridged.