${AUCTION_CURRENCY}

What it expands to

Currency of the bid, explicit or implied; confirmation only.

Expands with the currency of the bid, explicit or implied. Confirmation only; it does not convert anything.

What to watch for

If you bid multi-currency, log this next to AUCTION_PRICE. A price without its currency is how JPY wins get booked as USD wins.

Encoding

When a macro rides inside another URL as a query parameter, the expanded value must survive URL parsing: exchanges support suffixed forms like ${AUCTION_CURRENCY:B64} (base64) where documented, and values containing reserved characters must be percent-encoded. An unencoded expansion is the most common reason a notice URL truncates at the first ampersand.

Related

• All substitution macros
• Where nurl, burl, and lurl fire in the delivery flow
• Loss reason codes
• ${AUCTION_ID}
• ${AUCTION_BID_ID}
• ${AUCTION_IMP_ID}
• ${AUCTION_SEAT_ID}
• ${AUCTION_AD_ID}