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zkApp programmability is not yet available on the Mina Mainnet, but zkApps can now be deployed on the Mina Devnet.

Gadgets

Gadgets are small, reusable low-level building blocks that simplify the process of creating new cryptographic primitives. Most gadgets build upon custom gates and act as low-level accelerators in the proof system.

In o1js, you can import these provable and helper methods from the Gadgets namespace:

• Bitwise Operations
• Foreign Field Arithmetic

See the type declaration for Gadgets in the o1js Reference documentation.