hard20 pts · first answer countsmessage-queuesschemaevent-driven

Rolling out a breaking event change

The "amount" field in a widely used event must change from rupees as a float to paise as an integer. What is the safest way to roll this out?

A.Publish a new version alongside the old until all migrateB.Change the field in place on a quiet SundayC.Keep the name but document the new unit in the wikiD.Ask consumers to detect the unit from the value size

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Rolling out a breaking event change

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