Warden is a new type of non-custodial market based on the veBoost system, allowing vecRV holders to place offers for veBoost on their balance, while still having their veCRV available for basic Curve Gauges, Gauge Weights votes, and DAO votes.
While creating a BoostOffer on Warden, a veCRV holder approves the Warden contract to create veBoost on their balance, then set a price (in CRV) for 1vecRV/week, a percentage for the minimum Boost size a Buyer must take on their offer, and a 2nd percentage to set what is the maximum part of their veCRV balance Warden can create veBoost with (if the maximum is set at 50%, only the half of the veCRV balance is available to create veBoosts, the rest will always be used for the owner boost). And while there is no veBoost bought based on your BoostOffer, the veCRV holder keeps all it's balance as a personal boost.
Warden then allow Curve LPs to buy a veBoost (paying the fees in CRV), and try to maximize their Gauge multipliers to increase the yield on their provided liquidity, with or without having any veCRV themselves. In the future, this system will allow to target exact amount of veCRV to purchase via Warden to have a near-constant 2.5 multiplier for the factory Gauges.
Through the Curve ecosystem, the veCRV token (for VotingEscrowCRV) holds multiple utilities. One of them is to boost the user balances in the Liquidity Gauges, to increase the CRV they can receive through the distribution, up to a 2.5 multiplier (for more info, see Boosting in Curve docs).
Factory Gauges :
LiquidityGaugesV4 & LiquidityGaugesV5 :