const mapDispatchToProps = dispatch => ({
    setWeb3: (web3) => {
        dispatch({
            type: 'WEB3',
            value: web3
        })
    },
});

setInterval(() => {
                web3js.eth.getAccounts((error, accounts) => {
                    if (accounts.length > 0) {
                               this.props.setWeb3(web3js);
                 }
                });
            }, 2500);