added enum to show error reason

ethereum/contracts/coreRelayer/CoreRelayer.sol

@@ -7,6 +7,47 @@ import "./CoreRelayerDelivery.sol";
 import "./CoreRelayerStructs.sol";
 
 contract CoreRelayer is CoreRelayerDelivery {
+
+   enum ErrorReason {
+   SEND_ERROR,
+   FORWARD_ERROR,
+   MULTICHAIN_FORWARD_ERROR,
+   OTHER_ERROR
+    }
+
+function getRefundAddressBalance(bytes32 refundAddress) public view returns (uint256) {
+    address payable account = payable(address(uint160(uint256(refundAddress))));
+    return account.balance;
+}
+
+ uint256 leftoverFunds = getRefundAddressBalance(refundAddress);
+
+
+
+  IWormhole wormhole = wormhole();
+  uint256 wormholeMessageFee = wormhole.messageFee();
+
+
+
+ function getNeededValue(IWormholeRelayer.MultichainSend memory sendContainer) public view returns (uint256) {
+   // uint256 wormholeMessageFee = wormhole().messageFee();
+    uint256  totalMaxTransactionFee = 0;
+    uint256   totalReceiverValue = 0;
+
+    // Calculate the total maximum transaction fee and receiver value for all Send requests
+    for (uint256 i = 0; i < sendContainer.requests.length; i++) {
+        totalMaxTransactionFee += sendContainer.requests[i].maxTransactionFee;
+        totalReceiverValue += sendContainer.requests[i].receiverValue;
+    }
+
+    // Calculate the total needed value for the MultichainSend
+    uint256 neededValue =  wormholeMessageFee + totalMaxTransactionFee + totalReceiverValue;
+    return neededValue;
+    }
+
+    uint256 needed_Value = getNeededValue(sendContainer);
+
+
     /**
      * @notice This 'send' function emits a wormhole message that alerts the default wormhole relay provider to
      * call the receiveWormholeMessage(bytes[] memory vaas, bytes[] memory additionalData) endpoint of the contract on chain 'targetChain' and address 'targetAddress'
@@ -48,7 +89,10 @@ contract CoreRelayer is CoreRelayerDelivery {
             nonce,
             getDefaultRelayProvider()
         );
-    }
+
+        if (!(maxTransactionFee >= quoteGas(targetChain, gasLimit, getDefaultRelayProvider()))){
+            revert(ErrorReason.SEND_ERROR); // send function error
+    }}
 
     /**
      * @notice This 'send' function emits a wormhole message that alerts a relay provider to
@@ -130,6 +174,11 @@ contract CoreRelayer is CoreRelayerDelivery {
             nonce,
             getDefaultRelayProvider()
         );
+
+
+         if ((leftoverFunds + msg.value ) >= (maxTransactionFee + receiverValue + wormholeMessageFee)){
+            revert(ErrorReason.FORWARD_ERROR);
+        }
     }
 
     /**
@@ -223,6 +272,8 @@ contract CoreRelayer is CoreRelayerDelivery {
 
         // Pay the relay provider
         pay(relayProvider.getRewardAddress(), totalFee - wormholeMessageFee);
+
+
     }
 
     /**
@@ -285,6 +336,9 @@ contract CoreRelayer is CoreRelayerDelivery {
                 isValid: true
             })
         );
+         if (!(leftoverFunds>=needed_Value)) {
+            revert(ErrorReason.MULTICHAIN_FORWARD_ERROR); // multichain forward error 
+        }
     }
 
     /**
@@ -439,4 +493,16 @@ contract CoreRelayer is CoreRelayerDelivery {
         requests[0] = request;
         container = IWormholeRelayer.MultichainSend({relayProviderAddress: relayProvider, requests: requests});
     }
+
+    function getErrorMessage(ErrorReason reason) public pure returns (string memory) {
+    if (reason == ErrorReason.SEND_ERROR) {
+        return "Send transaction failed.";
+    } else if (reason == ErrorReason.FORWARD_ERROR) {
+        return "Error forwarding transaction.";
+    } else if (reason == ErrorReason.MULTICHAIN_FORWARD_ERROR) {
+        return "Error forwarding transaction to multiple chains.";
+    } else if (reason == ErrorReason.OTHER_ERROR) {
+        return "Unknown error occurred.";
+    }
+}
 }

ethereum/yarn-error.log

@@ -0,0 +1,68 @@
+Arguments: 
+  /Users/upendra/.nvm/versions/node/v16.17.1/bin/node /Users/upendra/.nvm/versions/node/v16.17.1/bin/yarn add node-forge
+
+PATH: 
+  /Users/upendra/.nvm/versions/node/v16.17.1/bin:/opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
+
+Yarn version: 
+  1.22.19
+
+Node version: 
+  16.17.1
+
+Platform: 
+  darwin arm64
+
+Trace: 
+  Error: ENOTDIR: not a directory, scandir '/Users/upendra/Desktop/developer/blockchain/openSource/trustlessGenericRelayer/tGR/trustless-generic-relayer/ethereum/node_modules'
+
+npm manifest: 
+  {
+    "name": "generic-relayer",
+    "version": "1.0.0",
+    "description": "",
+    "main": "networks.js",
+    "devDependencies": {
+      "@poanet/solidity-flattener": "^3.0.8",
+      "@typechain/ethers-v5": "^10.1.1",
+      "@types/chai": "^4.3.3",
+      "@types/koa": "^2.13.5",
+      "@types/koa-router": "^7.4.4",
+      "@types/mocha": "^9.1.1",
+      "chai": "^4.3.6",
+      "dotenv": "^16.0.3",
+      "ethers": "^5.7.1",
+      "mocha": "^10.0.0",
+      "ts-mocha": "^10.0.0",
+      "ts-node": "^10.9.1"
+    },
+    "scripts": {
+      "build": "forge build -o build --via-ir",
+      "forge-test": "forge test -vvv --via-ir",
+      "integration-test": "bash shell-scripts/run_integration_tests.sh",
+      "load-test": "ENV=testnet ts-node ts-scripts/mockIntegrations/loadGeneration.ts",
+      "typechain": "bash ../sdk/scripts/make_ethers_types.sh",
+      "flatten": "mkdir -p node_modules/@poanet/solidity-flattener/contracts && cp -r contracts/* node_modules/@poanet/solidity-flattener/contracts/ && poa-solidity-flattener",
+      "deployAndConfigureTilt": "ENV=tilt bash ./ts-scripts/shell/deployConfigureTest.sh",
+      "readContractsTestnet": "ENV=testnet bash ./ts-scripts/shell/readContractStatus.sh",
+      "size": "forge build --sizes --force --via-ir"
+    },
+    "author": "",
+    "license": "ISC",
+    "dependencies": {
+      "@certusone/wormhole-sdk": "^0.9.6",
+      "@improbable-eng/grpc-web-node-http-transport": "^0.15.0",
+      "elliptic": "^6.5.4",
+      "jsonfile": "^6.1.0",
+      "koa": "^2.14.1",
+      "koa-router": "^12.0.0",
+      "prom-client": "^14.2.0",
+      "typescript": "^4.8.3"
+    }
+  }
+
+yarn manifest: 
+  No manifest
+
+Lockfile: 
+  No lockfile