Following a partnership between Samourai Wallet and goTenna, which now allows users to send bitcoin transactions offline, one developer in New Zealand is staying ahead of the curve.Detailing the feat in a series of tweets, Rigel Walshe used a $27 entry level, Android smartphone and four goTennas (portable devices used to create off-grid radio signals) to successfully send a bitcoin transaction without access to the internet. Over the weekend I sent a bitcoin transaction to a relay 12.6km away with no cell network or internet connection. Here's a tweetstorm about how I used @gotenna and @SamouraiWallet to do it— Coinsure (@Coinsurenz) October 16, 2018Here’s how he did it.Working in Auckland, New Zealand, Walshe used Google Maps to devise a relay route that would respect goTenna’s stated maximum relay range of 6.4 km (though he notes this region is mountainous, so it was important to find high ground so as to not have any land structures interfere with the signals).As Walshe set up each goTenna, which has a concealed relay station, he sent a transaction to see if it effectively went through. His girlfriend was waiting on the other side of each transaction, with her smartphone connected to the goTenna mesh network Walshe created. (Although an internet connection was not needed in order to receive the transaction, she was only able to confirm that the transaction was successful by checking the ...
