Cellphone-2-cellphone no-internet cryptocurrency payment app - Digital cash

I have been thinking for a while that a no-internet cellphone-2-cellphone cryptocurrency payment app could be developed using a Cardano's Hydra Head running on docker for ARM64. Take this post as an open invitation for discussion: is there already an open source project doing this? are there other ways of achieving this? I think the major hurdle is to get a Hydra Head to work on a cellphone. I know there was at least one project I once even installed on my phone, HydraNow: But it's not available anymore. Seems to be related to this people: https://github.com/obsidiansystems/hydra-pay Hydra Pay provides an open source application and suite of libraries for builders on cardano to make use of Hydra (Head). The hydra-pay executable allows you to create instances and manage payment channels on the main cardano networks. The WebSocket API provies builders with the ability to create, manage and monitor payment channels so they can focus on their usecase. There is also https://developers.cardano.org/docs/get-started/cardano-wallet-js/ Get Started with cardano-wallet-js cardano-wallet-js cardano-wallet-js is a javascript/typescript SDK for Cardano with several functionalities. You can use it as a client for the official cardano-wallet and also to create Native Tokens and NFTs. Also https://developers.cardano.org/docs/get-started/cardanocli-js/ And others. It just needs our enthusiasm, development and support. Also, crypto market is booming. So, it is a great opportunity. Read you in the comments!

Mar 8, 2025 - 20:04

Cellphone-2-cellphone no-internet cryptocurrency payment app - Digital cash

I have been thinking for a while that a no-internet cellphone-2-cellphone cryptocurrency payment app could be developed using a Cardano's Hydra Head running on docker for ARM64.

Take this post as an open invitation for discussion: is there already an open source project doing this? are there other ways of achieving this?

I think the major hurdle is to get a Hydra Head to work on a cellphone.

I know there was at least one project I once even installed on my phone, HydraNow:

But it's not available anymore.

Seems to be related to this people: https://github.com/obsidiansystems/hydra-pay

Hydra Pay provides an open source application and suite of libraries for builders on cardano to make use of Hydra (Head). The hydra-pay executable allows you to create instances and manage payment channels on the main cardano networks.
The WebSocket API provies builders with the ability to create, manage and monitor payment channels so they can focus on their usecase.

There is also

https://developers.cardano.org/docs/get-started/cardano-wallet-js/

Get Started with cardano-wallet-js
cardano-wallet-js
cardano-wallet-js is a javascript/typescript SDK for Cardano with several functionalities. You can use it as a client for the official cardano-wallet and also to create Native Tokens and NFTs.

Also https://developers.cardano.org/docs/get-started/cardanocli-js/

And others.

It just needs our enthusiasm, development and support. Also, crypto market is booming. So, it is a great opportunity.

Read you in the comments!