Fixes after review

Author: viatrix

contracts/utils/ArbitrumGatewayAdapter.sol

@@ -39,10 +39,10 @@ abstract contract ArbitrumGatewayAdapter is AdapterHelper {
 
         _validateOutputToken(_addressToBytes32(outputToken), destinationDomain, outputTokens);
         // Get output token from the gateway
-        address gatewayOutputToken = ARBITRUM_GATEWAY_ROUTER.calculateL2TokenAddress(address(token));
+        address gatewayOutputToken = router.calculateL2TokenAddress(address(token));
         // Check that output tokens match
         require(gatewayOutputToken == outputToken, InvalidOutputToken());
-        address gateway = ARBITRUM_GATEWAY_ROUTER.getGateway(address(token));
+        address gateway = router.getGateway(address(token));
         token.forceApprove(gateway, amount);
         bytes memory gatewayData = router.outboundTransfer{value: msg.value}(
             address(token),

specific-fork-test/ethereum/Repayer.ts

@@ -29,8 +29,10 @@ describe("Repayer", function () {
     const DEPOSIT_PROFIT_ROLE = toBytes32("DEPOSIT_PROFIT_ROLE");
 
     const usdc = await hre.ethers.getContractAt("ERC20", forkNetworkConfig.Tokens.USDC);
-    const dai = await hre.ethers.getContractAt("ERC20", forkNetworkConfig.Tokens.DAI!);
-    const wbtc = await hre.ethers.getContractAt("ERC20", forkNetworkConfig.Tokens.WBTC!);
+    assertAddress(forkNetworkConfig.Tokens.DAI, "DAI address is missing");
+    const dai = await hre.ethers.getContractAt("ERC20", forkNetworkConfig.Tokens.DAI);
+    assertAddress(forkNetworkConfig.Tokens.WBTC, "WBTC address is missing");
+    const wbtc = await hre.ethers.getContractAt("ERC20", forkNetworkConfig.Tokens.WBTC);
     const liquidityPool = (await deploy(
       "TestLiquidityPool",
       deployer,