I'm updating some old code and have a question. The existing (perl) code uses the old SimLib function "GenerateInspFP" to generate a hash key which is included with each transaction using x_fp_hash. The form is then directly submitted to the transact.dll URL. I was working on updating it to use the Digest module but I don't see anything in the guide or sample code that suggests the x_fp* fields are supported by AIM. Are these fields ignored? If so, how do I ensure that x_amount hasn't been altered by a user before the form is submitted? (Or is this old code doing something entirely wrong?)
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