This looks like an exchange app. Where's the wallet River claims to have built?

nevent1qqs2we5gaz5hvfs382gz3wk70sxktcpk8a5rldus28u2356a25q5reqpz3mhxue69uhhyetvv9ujuerpd46hxtnfdupzppmx5480ngtskwrqh3n06e26hvjttld8t47hlumz73zy9777k3aeqvzqqqqqqy3zvetm
This looks like an exchange app. Where's the wallet River claims to have built?

nevent1qqs2we5gaz5hvfs382gz3wk70sxktcpk8a5rldus28u2356a25q5reqpz3mhxue69uhhyetvv9ujuerpd46hxtnfdupzppmx5480ngtskwrqh3n06e26hvjttld8t47hlumz73zy9777k3aeqvzqqqqqqy3zvetm
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