Signature generation should not rely on the default encoding #16
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Description of changes:
AmazonPayClient#generateButtonSignature()could return incorrect signature when the payload contains non-ascii characters and the system's default encoding is not UTF-8.I encountered this issue when I set some Japanese characters in
noteToBuyer.Although setting
file.encodingproperty can be a workaround, it should not be required.By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.