Quote an N:N basket: N input tokens funding M output tokens in one atomic transaction

Not decomposable into separate POST /quote calls — the backend's waterfall allocation (which input finances which output) is the thing being computed, then each resulting slice is quoted through the same provider fan-out POST /quote uses. inputLegs[] is what you sell (tokenIn + amount|amountRaw, each). outputLegs[] is what you want back as outputPercent, an integer percent of the TOTAL basket value (not a fixed amount) — every outputLegs[].outputPercent in the request must sum to exactly 100. Up to 10 combined input+output legs; the waterfall never produces more than inputLegs.length + outputLegs.length - 1 real on-chain legs. CoW is never a candidate leg (an EIP-712 signature or a separately-settled ETH-flow order can't be one leg of one atomic transaction). Pass the signing wallet to receive a buildable basket quoteId; without it the response is indicative and has no handoff.