13 Feb Ethereum: VRF local testing issues,Error: VM Exception while processing transaction: reverted with custom error ‘InsufficientBalance()’
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Ethereum: VRF Local Testing Issues and Rollbacks
As part of our ongoing learning journey with Patrick Collin’s course, we recently upgraded to VRF (Virtual Random Function) v2.5 on our local Ethereum test environment using Hardhat.
In this article, I will share some key observations from our experience with VRF local testing and highlight a critical issue that we encountered.
Upgrading to VRF V2.5
After making the necessary changes to the contract code and configuring the test environment using Hardhat, we successfully upgraded to VRF v2.5. Initial testing yielded promising results, but as we progressed further, we encountered an unexpected error.
Error: VM exception while processing transaction: returned with custom error “Insufficient balance”
After running a number of tests, including some simulations and scenario-based tests, we encountered the following error:
“Error: VM exception while processing transaction: returned with custom error “Insufficient balance””
This error occurred when we attempted to process transactions that exceeded the available balance.
Problem: Transactions returned and insufficient funds
After analyzing the error message and reviewing the test logs, we determined that the issue was related to an insufficient funds error. The error occurred due to an attempt to spend funds from an account that did not have sufficient balance.
Current VRF Local Testing Status
To summarize, we have upgraded to VRF v2.5 and are currently testing with Hardhat. Despite passing 13 out of 14 tests, our last test failed due to insufficient funds errors in the VRF on-premises test environment.
This issue highlights some important aspects of using VRF on-premises:
- Funds Management
: When working with VRF v2.5, it is very important to carefully manage funds to avoid unexpected errors like this.
- VRF Configuration: Make sure you have configured your VRF instance correctly and that the contracts and variables used in your tests are set up correctly.
- Test Scenarios: Create detailed test strategies that cover a variety of scenarios, including transactions that exceed available balances.
Next Steps
We plan to continue investigating and looking for potential solutions to resolve this issue. We will be working on:
- Reviewing the contract code for potential vulnerabilities or misconfigurations.
- Testing various scenarios and extreme cases to ensure our VRF on-premises test environment is robust.
- Improving our fund management strategies to prevent similar issues in the future.
Stay tuned for further updates on this project as we continue to address the complexities of VRF v2.5 on-premises with Hardhat.
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