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Each Arx node registers its declared CU capacity as metadata. Stake requirements determine whether it can activate and join a Cluster; see Staking overview.

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Protect key shares

Arx nodes store MPC key shares and preprocessing material offchain. Node Operators are responsible for protecting this data, the host, and access credentials. When selecting Cluster members, evaluate each Node Operator’s hosting, hardware, access controls, and key-management practices offchain.