vega-frontend-monorepo/apps/trading/components/web3-container/web3-container.tsx

import { gql } from '@apollo/client';
import type { NetworkParamsQuery } from './__generated__/NetworkParamsQuery';
import { Button, Splash } from '@vegaprotocol/ui-toolkit';
import { Web3Provider, Web3ConnectDialog } from '@vegaprotocol/web3';
import { useWeb3React } from '@web3-react/core';
import type { ReactNode } from 'react';
import { useEffect, useState } from 'react';
import { Connectors } from '../../lib/web3-connectors';
import { PageQueryContainer } from '../page-query-container';
import { t } from '@vegaprotocol/react-helpers';

export interface EthereumConfig {
  network_id: string;
  chain_id: string;
  confirmations: number;
  collateral_bridge_contract: {
    address: string;
  };
  multisig_control_contract: {
    address: string;
    deployment_block_height: number;
  };
  staking_bridge_contract: {
    address: string;
    deployment_block_height: number;
  };
  token_vesting_contract: {
    address: string;
    deployment_block_height: number;
  };
}

export const NETWORK_PARAMS_QUERY = gql`
  query NetworkParamsQuery {
    networkParameters {
      key
      value
    }
  }
`;

interface Web3ContainerProps {
  render: (params: { ethereumConfig: EthereumConfig }) => ReactNode;
}

export const Web3Container = ({ render }: Web3ContainerProps) => {
  const [dialogOpen, setDialogOpen] = useState(false);
  return (
    <PageQueryContainer<NetworkParamsQuery>
      query={NETWORK_PARAMS_QUERY}
      render={(data) => {
        const ethereumConfigParam = data.networkParameters?.find(
          (np) => np.key === 'blockchains.ethereumConfig'
        );

        if (!ethereumConfigParam) {
          return (
            <Splash>
              <p>{t('No ethereum config found')}</p>
            </Splash>
          );
        }

        let ethereumConfig: EthereumConfig;

        try {
          ethereumConfig = JSON.parse(ethereumConfigParam.value);
        } catch {
          return (
            <Splash>
              <p>{t('Could not parse config')}</p>
            </Splash>
          );
        }

        return (
          <Web3Provider connectors={Connectors}>
            <Web3Content
              appChainId={Number(ethereumConfig.chain_id)}
              setDialogOpen={setDialogOpen}
            >
              {render({ ethereumConfig })}
            </Web3Content>
            <Web3ConnectDialog
              connectors={Connectors}
              dialogOpen={dialogOpen}
              setDialogOpen={setDialogOpen}
              desiredChainId={Number(ethereumConfig.chain_id)}
            />
          </Web3Provider>
        );
      }}
    />
  );
};

interface Web3ContentProps {
  children: ReactNode;
  appChainId: number;
  setDialogOpen: (isOpen: boolean) => void;
}

export const Web3Content = ({
  children,
  appChainId,
  setDialogOpen,
}: Web3ContentProps) => {
  const { isActive, error, connector, chainId } = useWeb3React();

  useEffect(() => {
    if (connector?.connectEagerly) {
      connector.connectEagerly();
    }
  }, [connector]);

  if (error) {
    return (
      <SplashWrapper>
        <p className="mb-12">{t(`Something went wrong: ${error.message}`)}</p>
        <Button onClick={() => connector.deactivate()}>
          {t('Disconnect')}
        </Button>
      </SplashWrapper>
    );
  }

  if (!isActive) {
    return (
      <SplashWrapper>
        <p className="mb-12">{t('Connect your Ethereum wallet')}</p>
        <Button onClick={() => setDialogOpen(true)}>{t('Connect')}</Button>
      </SplashWrapper>
    );
  }

  if (chainId !== appChainId) {
    return (
      <SplashWrapper>
        <p className="mb-12">
          {t(`This app only works on chain ID: ${appChainId}`)}
        </p>
        <Button onClick={() => connector.deactivate()}>
          {t('Disconnect')}
        </Button>
      </SplashWrapper>
    );
  }

  return <>{children}</>;
};

interface SplashWrapperProps {
  children: ReactNode;
}

const SplashWrapper = ({ children }: SplashWrapperProps) => {
  return (
    <Splash>
      <div className="text-center">{children}</div>
    </Splash>
  );
};