37 lines
1.2 KiB
TypeScript
37 lines
1.2 KiB
TypeScript
// Copyright 2017-2020 @polkadot/react-hooks authors & contributors
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
import { useEffect, useState } from 'react';
|
|
import contractObservable from '@polkadot/ui-keyring/observable/contracts';
|
|
|
|
import useIsMountedRef from './useIsMountedRef';
|
|
|
|
interface UseContracts {
|
|
allContracts: string[];
|
|
hasContracts: boolean;
|
|
isContract: (address: string) => boolean;
|
|
}
|
|
|
|
export default function useContracts (): UseContracts {
|
|
const mountedRef = useIsMountedRef();
|
|
const [state, setState] = useState<UseContracts>({ allContracts: [], hasContracts: false, isContract: () => false });
|
|
|
|
useEffect((): () => void => {
|
|
const subscription = contractObservable.subject.subscribe((contracts): void => {
|
|
if (mountedRef.current) {
|
|
const allContracts = contracts ? Object.keys(contracts) : [];
|
|
const hasContracts = allContracts.length !== 0;
|
|
const isContract = (address: string): boolean => allContracts.includes(address);
|
|
|
|
setState({ allContracts, hasContracts, isContract });
|
|
}
|
|
});
|
|
|
|
return (): void => {
|
|
setTimeout(() => subscription.unsubscribe(), 0);
|
|
};
|
|
}, [mountedRef]);
|
|
|
|
return state;
|
|
}
|