Reference

a viewer donated to the active charity campaign.

Donor & Campaign

• [[[event.user_name]]] — Donor's display name
• [[[event.user_login]]] — Donor's username
• [[[event.charity_name]]] — Charity being donated to
• [[[event.charity_description]]] — Charity description
• [[[event.charity_logo]]] — Charity logo URL
• [[[event.charity_website]]] — Charity website URL

Amount

• [[[event.amount.formatted]]] — Ready-to-display string (e.g. "$15.23") — USE THIS
• [[[event.amount.value]]] — Raw minor units (1523 = $15.23)
• [[[event.amount.decimal_places]]] — Decimal places (usually 2)
• [[[event.amount.currency]]] — Currency code ("USD", "EUR", etc.)

example:

<div class="charity-donation">
  [[[event.user_name]]] donated [[[event.amount.formatted]]] to [[[event.charity_name]]]!
</div>

note: maps to the Twitch EventSub event channel.charity_campaign.donate.