bug: decodeEventLog returns an array without topics

[jagnani73]

Is there an existing issue for this?

• I have searched the existing issues

Package Version

^1.16.6

Current Behavior

If the ABI event has any input without a name, the following issues occur in decodeEventLog:

1. The args are returned in an array instead of an object
2. Only the data is parsed and returned, the topics are not returned

Expected Behavior

1. The inputs with a name and the topics should be returned in a structured object
2. The inputs without a name should either have a pseudo key name or be clubbed in an array separate from the originally returned args

Steps To Reproduce

1. Use the following data as arguments for the decodeLogEvent (refer this transaction)
   a. abi: https://etherscan.io/address/0x5c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f#code:~:text=Contract%20ABI,Export%20ABI
   b. data: 0x0000000000000000000000006cf029fe9c585f666255ff021c5114b6225a7bb0000000000000000000000000000000000000000000000000000000000004ac9c
   c. topics: ['0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9', '0x0000000000000000000000008f6e363022a5612003d62f2d29ac5ea6b37bb1e0', '0x000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2']
   d. eventName: PairCreated

Link to Minimal Reproducible Example (StackBlitz, CodeSandbox, GitHub repo etc.)

No response

Anything else?

The expected result is achieved by modifying the ABI and putting a name for the unnamed input

[jxom]

Args are decoded into an array as one of the arguments are unnamed – which is intentional behaviour. Could possibly look into its index being the name to preserve the object.

Going to close this as it isn't really a bug, but will convert into a discussion to continue the conversation.

[jxom]

Though, it is weird that the indexed arguments aren't being decoded? Can take a look at that.

[jagnani73]

Thanks