40 lines
1.7 KiB
TypeScript
40 lines
1.7 KiB
TypeScript
// Copyright 2017-2021 @polkadot/app-settings authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { ApiPromise } from '@polkadot/api';
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import type { ChainInfo } from './types';
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import { useMemo } from 'react';
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import { getSystemColor, getSystemIcon } from '@polkadot/apps-config';
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import { DEFAULT_DECIMALS, DEFAULT_SS58 } from '@polkadot/react-api';
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import { useApi } from '@polkadot/react-hooks';
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import { getSpecTypes } from '@polkadot/types-known';
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import { formatBalance, isNumber } from '@polkadot/util';
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function createInfo (api: ApiPromise, systemChain: string, systemName: string, specName: string): ChainInfo {
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return {
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chain: systemChain,
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color: getSystemColor(systemChain, systemName, specName),
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genesisHash: api.genesisHash.toHex(),
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icon: getSystemIcon(systemName, specName),
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metaCalls: Buffer.from(api.runtimeMetadata.asCallsOnly.toU8a()).toString('base64'),
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specVersion: api.runtimeVersion.specVersion.toNumber(),
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ss58Format: isNumber(api.registry.chainSS58) ? api.registry.chainSS58 : DEFAULT_SS58.toNumber(),
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tokenDecimals: (api.registry.chainDecimals || [DEFAULT_DECIMALS.toNumber()])[0],
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tokenSymbol: (api.registry.chainTokens || formatBalance.getDefaults().unit)[0],
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types: getSpecTypes(api.registry, systemChain, api.runtimeVersion.specName, api.runtimeVersion.specVersion) as unknown as Record<string, string>
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};
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}
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export default function useChainInfo (): ChainInfo | null {
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const { api, isApiReady, specName, systemChain, systemName } = useApi();
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return useMemo(
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() => isApiReady
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? createInfo(api, systemChain, systemName, specName)
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: null,
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[api, isApiReady, specName, systemChain, systemName]
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);
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}
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