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The Bolt Card

Bolt Card is an open-source, self-sovereign contactless Bitcoin payment-card system. It enables Lightning Network payments at compatible merchant point-of-sale applications using programmable NFC cards.
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Description

The Bolt Card provides open-source software and setup options for operating self-custodied Bitcoin Lightning payment cards. Users program NFC cards with a Bolt Card service address and secure keys; compatible merchant applications use each tap to request a one-time payment subject to configured transaction and daily limits. The project supports personal and merchant contactless payments through compatible Lightning wallets and POS systems.