pwap/pezkuwi-sdk-ui/packages/react-hooks/src/useNonZeroBn.ts

// Copyright 2017-2025 @polkadot/react-hooks authors & contributors
// SPDX-License-Identifier: Apache-2.0

import type { BN } from '@polkadot/util';
import type { FormField } from './useFormField.js';

import { useMemo } from 'react';

import { BN_ZERO, bnToBn } from '@polkadot/util';

import { createNamedHook } from './createNamedHook.js';
import { useFormField } from './useFormField.js';

function isValid (value: BN): boolean {
  return !value.isZero();
}

function useNonZeroBnImpl (initialValue: BN | number = BN_ZERO): FormField<BN> {
  const value = useMemo(() => bnToBn(initialValue), [initialValue]);

  return useFormField(value, isValid);
}

export const useNonZeroBn = createNamedHook('useNonZeroBn', useNonZeroBnImpl);