Is there a chance we can geo-locate the transaction?

[Stupidism]

Or how to make client-side geo-location trustable?

[yupnano]

sorry but what's " geo-locate the transaction"?

[Stupidism]

get the latitude and longitude info of the user on server-side (contract side)

[catalsdevelop]

That is what your application layer care about, not the storage layer. And ,users can fake their location data from some hack methods.

[1c7]

geolocation has nothing to do with transaction / blockchain,
you need get that information yourself, using HTML5 Geolocation API or some other methods.
and then you can store that geolocation info into transaction

if you have solve your problem, please close this issue