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Ethereum: Unknown Selection Error (0x98296c54) in Bigttokentt.t.Sol
In the last iteration of the popular framework for intelligent contract tests, `TestBobballance ', an unexpected error was encountered. The specific problem involves an "unknown selector" error, which is triggered when you do a test using the "bigtokentet" contract.
Problem: Unknown selection error (0x98296c54)
This unknown selection error occurs during the attempt to access the "VMCalls" function in the "TestBobballage" test. Error message, "Unknown selector 0x98296C54 for VMCalls", indicates that there is a problem with how the contract functions are called.
Source code: Bigttokenet.T.Sol
When examining the code, it seems that the "TestBobbating" function in the "Bigtokentest" contract contains a logical error. Specifically, the test tries to resort to the "VMCalls" function with an argument that is not defined in the current scope.
Problematic code line
Solidity
Public TestBobbalation Function {
// ... (other code)
VMCalls (VB, 0x0000000000000000000000000000000000000000000000000000000000);
}
”
In this code line, VMCALLS is called with an argument of 0x0000000000000000000000000000000000000000000000000000 ‘. However, the “VMCalls” function of the contract is expected at a specific argument, which is probably a value stored in the field of current application. In this case, it seems that no argument defined to the “VMCalls” function is provided.
Solution
To solve this problem, it seems that the author of the test has neglected an important detail: the “VMCalls” function of the contract requires the adoption of specific arguments during functional calls. To correct this error, the correct argument must be provided, which is probably a value stored in the current scope.
Here is a version of updating the code extract with the corrected line:
`Solidity
Public TestBobbalation Function {
// ... (other code)
VMCalls (VB, 0x00000000000000000000000000000000000000000000000000000000000000, 0x0000000000000000000000000000000000000000000000);
}
”
Adding the second argument 0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Conclusion
“Unknown selection error (0x98296c54) for VMCalls” in the testbobbating test “was resolved by correcting a logical error in the contract code. Understanding the problem and implementation of the necessary solution, developers can ensure that their smart contracts are going well and constantly.
Note: The above article is based on hypothetical information and may not reflect the scenarios in the real world or real Ethereum development practices. It is essential to check the errors or problems with a work test medium before making changes to the production code.
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