Why This Matters

AVSs (Autonomous Verifiable Services) often need guaranteed, term-locked security rather than open-ended deposits that can disappear overnight. Traditionally, restaking is variable-rate and with on-demand withdrawals, making it difficult for AVSs to plan their security.

Flow’s time-based bond vaults turn restaking into a predictable, fixed-income instrument. Depositors lock an asset (e.g., Agora’s AUSD) for a pre-defined term at a pre-negotiated APY. The network secures known capital for a known time, while depositors earn a yield that looks and settles like a zero-coupon bond coupon.

The Challenge

Certain AVSs need hard guarantees that collateral stays put during a certain period of time and can’t risk mid-cycle withdrawals.

Institutional LPs prefer fixed, predictable returns to fluctuating restaking yields.

Operators want security budgets they can size infrastructure against, not TVL that oscillates with market pumps.

How Flow “Bond Vaults” Work

1) Parameter Setup

The AVS or vault curator defines a deposit asset, duration of bond, payment, and hard TVL limit.

2) Vault Launch

Renzo and Concrete launch the vault with a specific raise window. Depositors receive a reward-bearing receipt token for the duration of the bond.

3) Restake and Delegate

TVL is restaked and delegated to the AVS that requires guaranteed security.

4) Maturity and Payout

Upon maturity of the Flow bond, depositors can claim the underlying principal as well as the accrued interest.

Benefits at a Glance

• The vault’s restaked assets are immovable for the term, perfect for AVSs that need security guarantees.

• Fixed-rate yield looks like a zero-coupon bond and allows for better planning.

• Tradable receipt tokens allow flexibility for LPs who need to exit early.

• No hassle implementation: everything is taken care of by Renzo and Concrete on the backend.

Looking Ahead

Time-based Flow vaults let any network have a guaranteed, fixed-term security layer, while offering depositors a clean, tradable yield product. If your organization is interested in “restaking bonds”, Renzo and Concrete can build you a custom solution in days. Reach out to us directly to learn more.

Restake with Renzo and Compound with Concrete.