add view methods

contracts/token/BiconomyTokenPaymaster.sol

@@ -440,6 +440,24 @@ contract BiconomyTokenPaymaster is
         );
     }
 
+    /**
+     * @dev Get the price of a token in USD
+     * @param tokenAddress The address of the token to get the price of
+     * @return price The price of the token in USD
+     */
+    function getPrice(address tokenAddress) public view returns (uint256) {
+        return _getPrice(tokenAddress);
+    }
+
+    /**
+     * @dev Check if a token is supported
+     * @param tokenAddress The address of the token to check
+     * @return bool True if the token is supported, false otherwise
+     */
+    function isTokenSupported(address tokenAddress) public view returns (bool) {
+        return independentTokenDirectory[tokenAddress].oracle != IOracle(address(0));
+    }
+
     /**
      * @dev Validate a user operation.
      * This method is abstract in BasePaymaster and must be implemented in derived contracts.

test/unit/concrete/TestTokenPaymaster.Base.t.sol

@@ -152,7 +152,7 @@ contract TestTokenPaymasterBase is TestBase {
     //    usdc.approve(address(SWAP_ROUTER_ADDRESS), usdc.balanceOf(address(tokenPaymaster)));
     //    vm.stopPrank();
 
-       // Todo: Review reason for failure
+       // Review reason for failure
        startPrank(PAYMASTER_OWNER.addr);
        tokenPaymaster.swapTokenAndDeposit(address(usdc), 1e6, 0);
        stopPrank();