useCashAppAmount

Manage the deposit amount input and read the minimum from the current asset selection.

When to use

On the amount form. Prefer this over reading selectedAsset.minAmountFiat yourself when you are inside CashAppProvider.

Example

import { useCashAppAmount, useCashAppAsset } from '@swapped/connect-sdk/react'

function AmountField() {
  const { selectedAsset } = useCashAppAsset()
  const {
    amount,
    setAmount,
    formattedMinAmount,
    error,
    onBlur,
    setToMin,
    isValid,
  } = useCashAppAmount()

  return (
    <div>
      <input
        value={amount}
        onChange={event => setAmount(event.target.value)}
        onBlur={onBlur}
        inputMode="decimal"
      />
      <p>
        Minimum ${formattedMinAmount}
        {selectedAsset ? ` for ${selectedAsset.asset}` : ''}
      </p>
      {error && <p>{error.message}</p>}
      {!isValid && error?.code === 'below_min' && (
        <button type="button" onClick={setToMin}>
          Update order
        </button>
      )}
      <p>{isValid ? 'Ready' : 'Fix amount'}</p>
    </div>
  )
}

Values below the minimum are allowed while typing; validation surfaces via error / isValid after touch. setAmount sanitizes input (commas → dots, digits, always 2 decimal places). Cash App is USD-only, so setFormatDefaults({ fiatDecimals, maxFiatDecimals }) does not change this.

Translating validation errors

error is structured ({ code, message, metadata }). Switch on code for i18n; use message as an English fallback:

import type { AmountValidationError } from '@swapped/connect-sdk'

function translateAmountError(error: AmountValidationError): string {
  switch (error.code) {
    case 'below_min':
      return `Min amount ${error.metadata.formattedMinAmount}`
    case 'above_spendable':
      return `Max amount ${error.metadata.formattedMaxAmount}`
    case 'above_balance':
      return `Balance is ${error.metadata.formattedBalanceAmount}`
    case 'amount_zero':
      return 'Amount cannot be 0'
    case 'invalid_amount':
    default:
      return error.message
  }
}

Optional max clamping

const { amount, setAmount } = useCashAppAmount({
  clampToMax: true,
  maxAmountFiat: 500, // consumer-defined max (Cash App has no API max)
})

When using maxAmountFiat, gate submit with this hook’s isValid (selection canSubmit only knows about the asset minimum).

To bump the amount up to the new asset minimum when the token changes, pass adjustAmountOnAssetChange on CashAppProvider.

Options

Option	Default	Purpose
clampToMax	false	Clamp input down to maxAmountFiat while typing
maxAmountFiat	-	Optional consumer-defined maximum

Returns

Field	Purpose
amount / setAmount / amountFloat	Controlled input
minAmountFiat / formattedMinAmount	Minimum (from selected asset)
maxAmountFiat / formattedMaxAmount	Maximum (from options, or null)
touched / setTouched / onBlur / resetTouched	Touch state
setToMin	Fill the asset minimum
error / isValid	Structured validation (error.code for i18n)
isLoading	Assets still loading

Requires CashAppProvider.