index.js

import paramsToProps from 'paramsToProps.js'

const MainNavigator = StackNavigator({
  firstScreen:  { screen: paramsToProps(FirstScreenComponent) },
  secondScreen: { screen: paramsToProps(SecondScreenComponent) },
});

paramsToProps.js

import React, { Component } from 'react';

export default (OriginalComponent) => {
  return class ParamsToPropsWrapper extends Component {
      static navigationOptions = OriginalComponent.navigationOptions;
      render() {
        const params = this.props.navigation.state.params;
        return <OriginalComponent {...this.props} {...params} />
      }
  }
}