25 lines
736 B
TypeScript
25 lines
736 B
TypeScript
// Copyright 2017-2023 @polkadot/react-hooks authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { BN } from '@polkadot/util';
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import type { FormField } from './useFormField.js';
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import { useMemo } from 'react';
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import { BN_ZERO, bnToBn } from '@polkadot/util';
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import { createNamedHook } from './createNamedHook.js';
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import { useFormField } from './useFormField.js';
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function isValid (value: BN): boolean {
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return !value.isZero();
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}
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function useNonZeroBnImpl (initialValue: BN | number = BN_ZERO): FormField<BN> {
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const value = useMemo(() => bnToBn(initialValue), [initialValue]);
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return useFormField(value, isValid);
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}
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export const useNonZeroBn = createNamedHook('useNonZeroBn', useNonZeroBnImpl);
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