@gnosis.pm/dapp-ui/lib-esm/provider-state/metamask.js

Web3 provider setup functions built with Typescript and love. From Gnosis.

export const MetamaskProviderStateSymbol = Symbol('MetamaskProviderState');
const getMetamaskProviderState = (provider) => {
    const { isMetaMask, autoRefreshOnNetworkChange, networkVersion, chainId, selectedAddress } = provider;
    return {
        [MetamaskProviderStateSymbol]: true,
        isMetaMask,
        autoRefreshOnNetworkChange,
        networkVersion,
        chainId: +chainId,
        selectedAddress,
        // don't return null for accounts[]
        accounts: selectedAddress == null ? [] : [selectedAddress],
        isConnected: provider.isConnected(),
        isEnabled: provider._metamask.isEnabled(),
        isApproved: provider._metamask.isApproved(),
        isUnlocked: provider._metamask.isUnlocked(),
    };
};
export default getMetamaskProviderState;
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