Robinhood Chain v4 pools — BandHook launch kit

Uniswap v4 dynamic-fee pools on Robinhood Chain (chain id 4663), market-made by BandHook: hook-owned core band + wide backstop, oracle-guarded permissionless recentering, divergence-driven dynamic fee. Pools: ETH/HOLLAR, HDX/HOLLAR, ETH/HDX (native ETH).

Design + evidence: garden note wiki/note-robinhood-pools-proposal.

• src/BandHook.sol — the hook (owner-funded, open to third-party LPs)
• src/sources/ — ChainlinkSource (single feed + invert + decimals), RatioSource (fallback)
• script/00–03 — deploy hook (CREATE2 salt-mined to flags 0x1080), setup pool, fund, hand off ownership
• test/ — 18 unit tests (ERC20 + native pools) and 2 fork tests against the live PoolManager

Fill .env from .env.example. Blanks that must exist first:

• bridged HOLLAR + HDX addresses (and confirmed decimals),
• HDX/USD + HDX/ETH ManagedOracles (wormhole-direct receiver stack, whm repo),
• owner multisig on Robinhood Chain.

forge test                                   # 20 green, incl. fork tests (uses the "robinhood" rpc alias)

forge script script/00_DeployBandHook.s.sol --rpc-url robinhood --broadcast   # once
# per pool (three env files):
set -a; source .env.eth-hollar; set +a
forge script script/01_SetupPool.s.sol --rpc-url robinhood --broadcast       # source + configure + initialize at oracle price
forge script script/02_Fund.s.sol --rpc-url robinhood --broadcast            # POOL_ID + FUND_AMOUNT0/1
# after all pools:
forge script script/03_HandOff.s.sol --rpc-url robinhood --broadcast         # multisig then calls acceptOwnership()

Post-launch: run the recenter keeper (permissionless recenter(poolId); ~350k gas, guards make it safe to call blindly) and wire alerts for feed staleness, guard tripped > N hours, and inventory skew.

Not audited. The hook custodies the LP capital — cap the pilot size until the audit lands.