set address in From optionally for CallOpts

[skudasov]

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Below is a summarization created by an LLM (gpt-4-0125-preview). Be mindful of hallucinations and verify accuracy.

Why

The changes aim to enhance how the NewCallOpts and NewCallKeyOpts functions in the seth client handle cases where no addresses are loaded or the specified key number is out of range. It addresses potential issues when calling view/pure functions without a sender, which may lead to incorrect behavior. Additionally, it simplifies error handling in these scenarios by removing redundant code and focusing on warning the user about possible implications.

What

• seth/.changeset/v1.51.4.md
  • Added a markdown file to document the change for version 1.51.4, stating that the From field in bind.CallOpts is now optional and warns about potential issues with view/pure functions without a sender.
• seth/client.go
  • Added a warning message constant WrnEmptyFromInCallOpts to notify users when no keys are found, and the From field in call options might be empty.
  • Modified NewCallOpts and NewCallKeyOpts functions to conditionally set the From field only if addresses are available, otherwise, log a warning message. This change removes the previous error handling where an error call options object was returned if the key number was out of range.
  • Removed the errCallOptsIfAddressCountTooLow function, which previously handled the error generation for out-of-range key numbers, simplifying the logic in creating call options.
  • Minor changes in gas estimation functions to use more concise function variable declarations.