/**
 * The amount as the user types it, and which denomination they are typing in.
 *
 * - `amount` never changes meaning: the quote, the validation and the signature
 *   are all in source-token units, so when typing in dollars the typed figure
 *   is held here and `amount` is what it converts to.
 * - Held with the form rather than in the screen, which unmounts on the way to
 *   the recipient — local state would drop both on Continue.
 */
export declare function useWithdrawalAmountInput({ amount, setAmount, sourceUsdPrice, sourceDecimals, }: {
    /** The withdrawal amount, in source-token units. */
    amount: string;
    setAmount: (amount: string) => void;
    /** Spot USD price of the source token; `0` is the price hook's "unknown". */
    sourceUsdPrice: number;
    /** Fraction digits the source token carries, once they're known. */
    sourceDecimals: number | undefined;
}): {
    /** What to show and edit: dollars when {@link inUsd}, else token units. */
    input: string;
    setInput: (next: string) => void;
    inUsd: boolean;
    /**
     * Switches denomination, converting the amount rather than clearing it.
     *
     * - Deliberately does not re-price against a rate that moved since the
     *   figure was typed: rewriting what someone entered, under them, is worse
     *   than showing it at the rate they entered it at.
     * - The staleness is bounded by refreshing the price on the way into this
     *   screen rather than while it is open.
     */
    swapDenomination: () => void;
    /** Offering the swap without a rate would promise one we don't have. */
    canSwapDenomination: boolean;
    /** What the amount is worth, or `undefined` when nothing prices it. */
    amountUsd: string | undefined;
};
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