This document describes how to handle viewability in Prebid Server
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Choose vendor constants: These constants should be unique. The list of existing vendor constants can be found here
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Add the constants to bidder-info: The list of vendors supported by your exchange is to be added to
../../src/main/resources/bidder-config/{bidder}.yaml
file -
Map constants to vendor urls in this file.
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The adapter should be able to read the vendor constants from
bidrequest.imp[i].metric[j].vendor
and map it to the respective vendor url before making a request to the exchange.