diff --git a/per_multicall/script/Vault.s.sol b/per_multicall/script/Vault.s.sol
index d9a598c9..74e541e5 100644
--- a/per_multicall/script/Vault.s.sol
+++ b/per_multicall/script/Vault.s.sol
@@ -102,6 +102,7 @@ contract VaultScript is Script {
         address vault = deployVault(per, pyth);
         address[] memory tokens = new address[](5);
         uint256 lots_of_money = 10 ** 36;
+        // Vault simulator assumes the token name is pyth pricefeed id in mainnet
         tokens[0] = address(
             new MyToken(
                 "e62df6c8b4a85fe1a67db44dc12de5db330f7ac66b72dc658afedf0f4a415b43",
diff --git a/per_multicall/src/WETH9.sol b/per_multicall/src/WETH9.sol
index c9972a27..ab03b478 100644
--- a/per_multicall/src/WETH9.sol
+++ b/per_multicall/src/WETH9.sol
@@ -20,6 +20,7 @@
 pragma solidity ^0.8.0;
 
 contract WETH9 {
+    // Vault simulator assumes the token name is pyth pricefeed id in mainnet
     string public name =
         "c96458d393fe9deb7a7d63a0ac41e2898a67a7750dbd166673279e06c868df0a"; // ETH/USD pricefeed id
     string public symbol = "WETH";