Ethereum Transaction Rollback Error: “Transaction is being rolled back when calling the bookRoom() function”
As a developer implementing a smart contract using the Ethereum Virtual Machine (EVM), you have probably encountered issues related to transaction rollbacks. In this article, we will analyze why an error occurs and how to resolve it.
The Issue
In your case, when calling the bookRoom() function from within your contract, the EVM is encountering a transaction rollback. This means that the execution of the smart contract code has been interrupted due to a validation failure or other error in the contract logic.
Error Details
To troubleshoot this issue, you can access the transaction details using the eth.getTransactionReceipt() function in the EVM console. Here is an excerpt from your deployment script:
contract = new Web3.eth.Contract(
'0x' + [...yourContractAddress],
[...yourContractAbi],
{ gas: 200000, args: [...yourArgs] }
);
In this example, the eth.getTransactionReceipt() call retrieves the transaction receipt associated with the most recent block in your blockchain. From there, you can inspect the transaction details to identify the error.
Transaction Details
When reviewing the transaction receipt, you will see an error message indicating the reason for the rollback. In this case, the error might look something like this:
0x... (transaction hash)
Error: Reverted: Function "bookRoom" not found
The function field in the error message indicates that the contract code was trying to call a function named bookRoom().
Solution
To resolve this issue, you need to ensure that the bookRoom() function is defined correctly in your contract. Here are some possible solutions:
- Update the ABI: Make sure that the definition of the
bookRoom()function matches the one specified in your deployment script. If the function name or parameters have changed, update the ABI accordingly.
- Check for typos
: Make sure that you haven’t missed any typos when defining the
bookRoom()function. Use a code analyzer like Truffle’s built-in linter to catch potential errors.
- Check the contract logic: Make sure the
bookRoom()function is implemented correctly and behaves as expected. If the issue persists, investigate the contract logic further.
Example solution
To troubleshoot the issue, you can modify your deployment script to include a debug statement:
contract = new Web3.eth.Contract(
'0x' + [...yourContractAddress],
[...yourContractAbi],
{ gas: 200000, args: [...yourArgs] }
);
console.log('Transaction:', contract.transactionHash);
This will output the transaction hash associated with the most recent block. By inspecting this information, you can verify that the bookRoom() function is defined correctly and calls the function as intended.
By following these steps and using the EVM console to inspect the transaction details, you should be able to identify and resolve the issue causing the “transaction is being rolled back when calling bookRoom() function” error.
