Quote a trade

You are buying Yes on “Will ETH be above $5,000 at year end?” Size comes from a quote, not from the mid on the card. Invalid is not tradable. Display mids live on market.prices(). You need a market people can already trade, collateral (to buy) or shares (to sell), and the token for a named answer. If the quote cannot fill the full size, swap the capped amount, not the original number.

const pool = client.pool(outcomeToken, { market: marketAddress, outcomeIndex: 0 })
const quote = await pool.quoteTrade({
  side: 'buy', // or 'sell'
  amountIn,
})

This is an exact-in quote with the same sides as swap: buy turns collateral into that answer; sell is the reverse. The quote may return a capped size when the full request cannot fill (withinRange: false). If it capped you, swap quote.amountIn, not the original number.

Promise<{
  requestedAmountIn: bigint
  amountIn: bigint
  amountOut: bigint
  withinRange: boolean
  maxAmountIn: bigint
  message?: string
  error?: "EXCEEDS_RANGE"
  spotPrice?: number | null
  priceAfter?: number | null
  priceAboveNinetyNineCents?: boolean
}>

Field	Meaning
`requestedAmountIn`	Size you asked for
`amountIn`	Size this `amountOut` applies to (may be capped)
`amountOut`	Expected out for `amountIn`
`withinRange`	Whether the full request quoted successfully
`maxAmountIn`	Largest size that still quotes
`message?` / `error?: "EXCEEDS_RANGE"`	When capped
`spotPrice?` / `priceAfter?`	Mid before / after (after currently equals spot)
`priceAboveNinetyNineCents?`	Current spot already above 0.99

Quote again right before you send — mids from the indexer can be stale.

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