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Should I emit Transfer event, when zero amount of Ether or of a token is transferred?

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  • yes
  • no
  • both are OK
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There's no harm in emitting the event for both.

Events are more about letting an external entity that something (ex. a function call) happened with certain parameters. If there are zero cases, let the external entity handle that scenario instead of choosing for them.

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    From the EIP-20 standard Transfers of 0 values MUST be treated as normal transfers and fire the Transfer event.
    – Ismael ♦
    Commented Mar 27, 2018 at 14:29

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