Satstreamr connected a one-to-one video session to small, repeated payments while the call ran. Nelson P. built the browser application, wallet and metering flow, with a separate service for video signaling.
A paid remote session creates a timing problem: the host provides time while the viewer pays for it. Charging everything before or after the call separates payment from the actual session.
The project explored metering small payments during a call. That required the application to coordinate video state, wallet balance and payment confirmation, including what happens when one of those stops.
WebRTC connected the browsers for video, supported by a small signaling service. An in-browser Cashu ecash wallet held the viewer’s balance, with Lightning used for loading and cashing out.
The metering engine coordinated repeated payments and confirmation. It paused when progress stalled and ended the call when the balance was exhausted. The wallet and metering code were made public alongside the signaling service.
Project materials showing the workflows and interfaces described in this case.
Video, wallet and payment metering. The delivery section explains the workflow demonstrated here.
The project delivered the complete session loop: connect, load a balance, meter payment and stop. Publishing the code exposed the implementation of both the video and payment coordination.
Payment metering needs an explicit state model and recovery behavior. A handover should document the wallet, the Cashu mint dependency, signaling and the handling of interrupted calls. An in-browser wallet changes where balances are held, but does not remove the need to understand the underlying payment providers.
Project contribution: Nelson P.. The scope described above identifies the work behind this case.
Editorial review: Ego Eimi · Updated September 6, 2026 · About the team
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