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A Nested Safe is a Safe Smart Account owned and controlled by an existing Safe multisig. For institutions using this setup, the multisig controls a separate account for its funds while the Agent manages positions within approved permissions. This resembles a Separately Managed Account (SMA) structure in TradFi.

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For Institutions: Multisig-Controlled Agents

Nested Safe eliminates the need for an EOA to deploy a Zyfai Smart Account. Instead, an institution’s existing multisig infrastructure holds all deposited capital directly: a critical requirement for compliance, internal governance, and institutional capital allocation. The result is the operational benefit of automated yield management with transparent, segregated custody. How the structure works:
  • Multisig at the top level: your existing Safe acts as the controlling multisig.
  • Agent Smart Account underneath: the Agent operates through a nested Smart Account (Safe7579) that is owned and controlled by your multisig.
  • Granular delegation via Session Keys: Session Keys restrict what the Agent can do, which protocols it can access, and which contracts it can call. All parameters are defined and approved by you.
This design ensures that:
  • The Agent can rebalance and manage positions efficiently.
  • The multisig always remains the ultimate owner and authority.
  • No centralized operator, including Zyfai, can unilaterally move funds.
To access your Safe multisig outside of Zyfai, head to our guide: Use Zyfai via Safe Global.