Barker ALM Engine

Idle backing capital should earn while it backs quotes — and a liquidity range beats a limit order when the pool pays fees.

Arc testnet · Uniswap v4

Take-profit ladders, closed by a keeper that cannot steal

Funded one-sided above spot, a range sells into strength across its span and earns the pool fee while it does. When it has fully converted, the keeper closes it — and close can only ever pay the position's owner.

Every swap on the pool · fee charged, and why

Ethereum mainnet · 1inch SwapVM

A maker whose capital earns while it quotes

The maker's USDC sits in steakUSDC. A solvency guard caps every quote at what the vault can actually redeem, and settlement hooks redeem on fill and re-deposit on receipt, inside the swap. Return = vault APY + spread.

What the guard does to a quote

No guard · priced against 10M virtual reserves Guard, Sep 5 · capped one reserve, broke the price Guard, now · caps depth, keeps the price

One recorded run, end to end