Short Answer:
Cashu is a free, open-source Chaumian ecash protocol built for Bitcoin. It allows users to conduct transactions using digital bearer tokens stored on their devices, mirroring the tangible qualities of physical cash. The protocol facilitates the creation of applications such as wallets or voucher systems, emphasizing privacy, security, and scalability.
More info:
https://docs.cashu.space
Michilis Edited question May 11, 2024
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