Error Handling Statement 2: The program did not terminate on Solana
As a developer using the Solana blockchain, you are probably aware of the importance of handling errors when interacting with the network. In this article, we will examine why a recent attempt to sell tokens on the PumpFun system resulted in an error in processing statement 2 (Error Handling Statement 2: The program did not terminate).
The Problem
In the code snippet, you are trying to access a Solana mintData object that contains parsed information for a token. However, this object is not properly initialized or formatted.
Specifically, when accessing the decimals property, you are using an expression with optional chaining (?.), like this:
const decimals = mintData.value?.data.parsed.info.decimals;
The problem is that `mintData'' is not guaranteed to havevalue'' ordata'' objects. IfmintData'' is missing any of these properties, attempting to access their values will result in an error.
The Solution
To resolve this issue, you need to make sure that themintData'' object has the required properties before attempting to access them. Here are some possible solutions:
- Add null checks: You can add additional null checks to check if
value'' anddata'' exist before attempting to access the values:
const decimals = mintData?.value?.data?.parsed?.info?.decimals;
This ensures that you don't try to access the decimals'' property ifmintData'' doesn't have avalue'',data'', orparsed'' object.
- Use optional chaining with default values: Instead of using optional chaining, consider assigning default values to missing properties:
const decimals = mintData?.value?.data.parsed.info.decimals ?? 0;
This will set the decimal value to 0 if mintData.value'',mintData.data.parsed.info.decimals'', or none of them are missing.
- Explicitly check for errors
![Solana: Got error when I try to sell token in pumpfun [error=Error processing Instruction 2: Program failed to complete]](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
: If you are using a TypeScript compiler, such as TypeScript 4.7 or later, you can use the
as const' annotation to report an error if the property does not exist:
![Solana: Got error when I try to sell token in pumpfun [error=Error processing Instruction 2: Program failed to complete]](https://golfhubpro.com/wp-content/uploads/2025/02/02f7a625.png)
const decimals: number = (mintData mint const)?.value?.data.parsed.info?.decimals ?? 0;
This ensures that your code will throw a TypeScript error if required properties are missing, making it easier to identify and fix issues.
Conclusion
In summary, when using Solana with PumpFun, it is essential to validate the `mintData” object before attempting to access its properties. By implementing null checks, default value assignments, or explicit type annotations, you can ensure that your code handles errors effectively and efficiently.
Keep in mind that error handling is key in multi-chain applications like PumpFun, where compatibility issues can arise when interacting with different blockchain networks.