refactor: generalized the AaveOracle variables and event names

contracts/misc/AaveOracle.sol

@@ -18,29 +18,34 @@ import {SafeERC20} from '../dependencies/openzeppelin/contracts/SafeERC20.sol';
 contract AaveOracle is IPriceOracleGetter, Ownable {
   using SafeERC20 for IERC20;
 
-  event WethSet(address indexed weth);
+  event BaseCurrencySet(address indexed baseCurrency, uint256 baseCurrencyUnit);
   event AssetSourceUpdated(address indexed asset, address indexed source);
   event FallbackOracleUpdated(address indexed fallbackOracle);
 
   mapping(address => IChainlinkAggregator) private assetsSources;
   IPriceOracleGetter private _fallbackOracle;
-  address public immutable WETH;
+  address public immutable BASE_CURRENCY;
+  uint256 public immutable BASE_CURRENCY_UNIT;
 
   /// @notice Constructor
   /// @param assets The addresses of the assets
   /// @param sources The address of the source of each asset
   /// @param fallbackOracle The address of the fallback oracle to use if the data of an
   ///        aggregator is not consistent
+  /// @param baseCurrency the base currency used for the price quotes. If USD is used, base currency is 0x0
+  /// @param baseCurrencyUnit the unit of the base currency
   constructor(
     address[] memory assets,
     address[] memory sources,
     address fallbackOracle,
-    address weth
+    address baseCurrency,
+    uint256 baseCurrencyUnit
   ) public {
     _setFallbackOracle(fallbackOracle);
     _setAssetsSources(assets, sources);
-    WETH = weth;
-    emit WethSet(weth);
+    BASE_CURRENCY = baseCurrency;
+    BASE_CURRENCY_UNIT = baseCurrencyUnit;
+    emit BaseCurrencySet(baseCurrency, baseCurrencyUnit);
   }
 
   /// @notice External function called by the Aave governance to set or replace sources of assets
@@ -83,8 +88,8 @@ contract AaveOracle is IPriceOracleGetter, Ownable {
   function getAssetPrice(address asset) public view override returns (uint256) {
     IChainlinkAggregator source = assetsSources[asset];
 
-    if (asset == WETH) {
-      return 1 ether;
+    if (asset == BASE_CURRENCY) {
+      return BASE_CURRENCY_UNIT;
     } else if (address(source) == address(0)) {
       return _fallbackOracle.getAssetPrice(asset);
     } else {

helpers/contracts-deployments.ts

@@ -1,4 +1,4 @@
-import { Contract } from 'ethers';
+import { BigNumberish, Contract } from 'ethers';
 import { DRE } from './misc-utils';
 import {
   tEthereumAddress,
@@ -188,8 +188,8 @@ export const deployAaveLibraries = async (
   return {
     ['__$de8c0cf1a7d7c36c802af9a64fb9d86036$__']: validationLogic.address,
     ['__$22cd43a9dda9ce44e9b92ba393b88fb9ac$__']: reserveLogic.address,
-    ["__$52a8a86ab43135662ff256bbc95497e8e3$__"]: genericLogic.address,
-  }
+    ['__$52a8a86ab43135662ff256bbc95497e8e3$__']: genericLogic.address,
+  };
 };
 
 export const deployLendingPool = async (verify?: boolean) => {
@@ -224,7 +224,7 @@ export const deployMockAggregator = async (price: tStringTokenSmallUnits, verify
   );
 
 export const deployAaveOracle = async (
-  args: [tEthereumAddress[], tEthereumAddress[], tEthereumAddress, tEthereumAddress],
+  args: [tEthereumAddress[], tEthereumAddress[], tEthereumAddress, tEthereumAddress, string],
   verify?: boolean
 ) =>
   withSaveAndVerify(

tasks/dev/4_oracles.ts

@@ -18,6 +18,7 @@ import {
   getLendingPoolAddressesProvider,
   getPairsTokenAggregator,
 } from '../../helpers/contracts-getters';
+import { ethers } from 'ethers';
 
 task('dev:deploy-oracles', 'Deploy oracles for dev enviroment')
   .addFlag('verify', 'Verify contracts at Etherscan')
@@ -58,7 +59,13 @@ task('dev:deploy-oracles', 'Deploy oracles for dev enviroment')
     );
 
     await deployAaveOracle(
-      [tokens, aggregators, fallbackOracle.address, await getWethAddress(poolConfig)],
+      [
+        tokens,
+        aggregators,
+        fallbackOracle.address,
+        await getWethAddress(poolConfig),
+        ethers.constants.WeiPerEther.toString(),
+      ],
       verify
     );
     await waitForTx(await addressesProvider.setPriceOracle(fallbackOracle.address));

tasks/full/3_oracles.ts

@@ -18,6 +18,7 @@ import {
   getPairsTokenAggregator,
 } from '../../helpers/contracts-getters';
 import { AaveOracle, LendingRateOracle } from '../../types';
+import { ethers } from 'ethers';
 
 task('full:deploy-oracles', 'Deploy oracles for dev enviroment')
   .addFlag('verify', 'Verify contracts at Etherscan')
@@ -55,7 +56,13 @@ task('full:deploy-oracles', 'Deploy oracles for dev enviroment')
         aaveOracle = await await getAaveOracle(aaveOracleAddress);
       } else {
         aaveOracle = await deployAaveOracle(
-          [tokens, aggregators, fallbackOracleAddress, await getWethAddress(poolConfig)],
+          [
+            tokens,
+            aggregators,
+            fallbackOracleAddress,
+            await getWethAddress(poolConfig),
+            ethers.constants.WeiPerEther.toString(),
+          ],
           verify
         );
         await waitForTx(await aaveOracle.setAssetSources(tokens, aggregators));

test-suites/test-aave/__setup.spec.ts

@@ -30,7 +30,7 @@ import {
   authorizeWETHGateway,
 } from '../../helpers/contracts-deployments';
 import { eEthereumNetwork } from '../../helpers/types';
-import { Signer } from 'ethers';
+import { ethers, Signer } from 'ethers';
 import { TokenContractId, eContractid, tEthereumAddress, AavePools } from '../../helpers/types';
 import { MintableERC20 } from '../../types/MintableERC20';
 import {
@@ -215,7 +215,13 @@ const buildTestEnv = async (deployer: Signer, secondaryWallet: Signer) => {
 
   const [tokens, aggregators] = getPairsTokenAggregator(allTokenAddresses, allAggregatorsAddresses);
 
-  await deployAaveOracle([tokens, aggregators, fallbackOracle.address, mockTokens.WETH.address]);
+  await deployAaveOracle([
+    tokens,
+    aggregators,
+    fallbackOracle.address,
+    mockTokens.WETH.address,
+    ethers.constants.WeiPerEther.toString(),
+  ]);
   await waitForTx(await addressesProvider.setPriceOracle(fallbackOracle.address));
 
   const lendingRateOracle = await deployLendingRateOracle();
@@ -243,12 +249,8 @@ const buildTestEnv = async (deployer: Signer, secondaryWallet: Signer) => {
 
   const config = loadPoolConfig(ConfigNames.Aave);
 
-  const {
-    ATokenNamePrefix,
-    StableDebtTokenNamePrefix,
-    VariableDebtTokenNamePrefix,
-    SymbolPrefix,
-  } = config;
+  const { ATokenNamePrefix, StableDebtTokenNamePrefix, VariableDebtTokenNamePrefix, SymbolPrefix } =
+    config;
   const treasuryAddress = await getTreasuryAddress(config);
 
   await initReservesByHelper(

test-suites/test-amm/__setup.spec.ts

@@ -29,7 +29,7 @@ import {
   deployFlashLiquidationAdapter,
   authorizeWETHGateway,
 } from '../../helpers/contracts-deployments';
-import { Signer } from 'ethers';
+import { ethers, Signer } from 'ethers';
 import { TokenContractId, eContractid, tEthereumAddress, AavePools } from '../../helpers/types';
 import { MintableERC20 } from '../../types/MintableERC20';
 import {
@@ -212,7 +212,7 @@ const buildTestEnv = async (deployer: Signer, secondaryWallet: Signer) => {
 
   const [tokens, aggregators] = getPairsTokenAggregator(allTokenAddresses, allAggregatorsAddresses);
 
-  await deployAaveOracle([tokens, aggregators, fallbackOracle.address, mockTokens.WETH.address]);
+  await deployAaveOracle([tokens, aggregators, fallbackOracle.address, mockTokens.WETH.address, ethers.constants.WeiPerEther.toString()]);
   await waitForTx(await addressesProvider.setPriceOracle(fallbackOracle.address));
 
   const lendingRateOracle = await deployLendingRateOracle();