A badge is a way of referring to a resource on Radix (such as a fungible token or NFT) when it is used for authorization purposes.

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For example, a car parking dApp may provide users a loyalty card NFT badge.

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The user can present that NFT badge when interacting with the dApp, which can provide discounts on their purchases of parking.

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The NFT never leaves the user’s account as Radix makes it possible to produce a “proof” of ownership of a badge within a transaction, without it ever having to leave their Smart Account. The dApp logic can use this proof to authorize the user. This is kind of like “flashing” a real-life badge to prove you have access to something, without it leaving your wallet.

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Badges, in combination with Radix’s native access control features, allows for powerful dApps to be built with complex authorization systems, quickly, safely and securely.

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Further reading:

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