Can you provide examples of usage of Predicates?

Sway
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Hi guys. Can you provide please examples of usage of Predicates in defi?

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A good example is OTC Swap built on Fuel.

This predicate serves as an “order” that anyone can fill. The order maker transfers a coin to the predicate root which can be unlocked by any transaction which has an output that satisfies the conditions of the order : the spending transaction must transfer ask_amount of ask_token to the receiver . These constants are hard-coded in the predicate itself, so that the bytecode root commits to this specific set of conditions.

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