Merge pull request #517 from ethereum/dev

Release dev -> master

Author: wackerow

src/components/ClientDiversityWarning.tsx

@@ -0,0 +1,54 @@
+// Libary imports
+import React from 'react';
+import styled from 'styled-components';
+import { FormattedMessage } from 'react-intl';
+// Component imports
+import { Text } from './Text';
+import { Link } from './Link';
+
+const Container = styled(Text as any)`
+  background: #ffdeb32e;
+  border: 1px solid burlywood;
+  padding: 30px;
+  border-radius: 4px;
+`;
+
+export interface ClientDiversityWarningProps {
+  children: React.ReactNode;
+  className?: string;
+}
+
+export const ClientDiversityWarning = (props: ClientDiversityWarningProps) => {
+  const { children, className } = props;
+  return (
+    <Container className={className}>
+      {!!children && <p>{children}</p>}
+      <p>
+        <FormattedMessage
+          defaultMessage="Client diversity is extremely important for the network health of Ethereum:
+            A bug in a client with a share of over 33% can cause Ethereum to go offline. If the client has
+            a supermajority (>66%), a bug could cause the chain to incorrectly split, potentially leading to
+            slashing."
+        />
+      </p>
+      <p>
+        <FormattedMessage defaultMessage="If at all possible, consider running another client at this time to help protect yourself and the network." />
+      </p>
+      <ul>
+        <li>
+          <Link
+            to="https://ethereum.org/en/developers/docs/nodes-and-clients/client-diversity/"
+            primary
+          >
+            <FormattedMessage defaultMessage="More on client diversity" />
+          </Link>
+        </li>
+        <li>
+          <Link to="https://clientdiversity.org/" primary>
+            <FormattedMessage defaultMessage="Latest data on network client usage" />
+          </Link>
+        </li>
+      </ul>
+    </Container>
+  );
+};