Merge branch 'feature/ui-tweaks' into develop

src/Block.tsx

@@ -1,15 +1,23 @@
 import React, { useEffect, useState, useMemo } from "react";
 import { useParams, NavLink } from "react-router-dom";
 import { ethers, BigNumber } from "ethers";
+import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
+import {
+  faChevronLeft,
+  faChevronRight,
+} from "@fortawesome/free-solid-svg-icons";
 import { provider } from "./ethersconfig";
 import StandardFrame from "./StandardFrame";
 import StandardSubtitle from "./StandardSubtitle";
 import ContentFrame from "./ContentFrame";
+import NavButton from "./components/NavButton";
 import Timestamp from "./components/Timestamp";
 import GasValue from "./components/GasValue";
 import BlockLink from "./components/BlockLink";
 import AddressLink from "./components/AddressLink";
 import TransactionValue from "./components/TransactionValue";
+import HexValue from "./components/HexValue";
+import { useLatestBlockNumber } from "./useLatestBlock";
 
 type BlockParams = {
   blockNumberOrHash: string;
@@ -89,6 +97,8 @@ const Block: React.FC = () => {
     }
   }, [block]);
 
+  const latestBlockNumber = useLatestBlockNumber();
+
   return (
     <StandardFrame>
       <StandardSubtitle>
@@ -100,9 +110,36 @@ const Block: React.FC = () => {
       {block && (
         <ContentFrame>
           <InfoRow title="Block Height">
-            <span className="font-bold">
+            <div className="flex space-x-1 items-baseline">
-              {ethers.utils.commify(block.number)}
+              <span className="font-bold mr-1">
-            </span>
+                {ethers.utils.commify(block.number)}
+              </span>
+              <NavButton
+                blockNum={block.number - 1}
+                disabled={block.number === 0}
+              >
+                <FontAwesomeIcon icon={faChevronLeft} />
+              </NavButton>
+              <NavButton
+                blockNum={block.number + 1}
+                disabled={
+                  latestBlockNumber === undefined ||
+                  block.number >= latestBlockNumber
+                }
+              >
+                <FontAwesomeIcon icon={faChevronRight} />
+              </NavButton>
+              <NavButton
+                blockNum={latestBlockNumber!}
+                disabled={
+                  latestBlockNumber === undefined ||
+                  block.number >= latestBlockNumber
+                }
+              >
+                <FontAwesomeIcon icon={faChevronRight} />
+                <FontAwesomeIcon icon={faChevronRight} />
+              </NavButton>
+            </div>
           </InfoRow>
           <InfoRow title="Timestamp">
             <Timestamp value={block.timestamp} />
@@ -155,16 +192,16 @@ const Block: React.FC = () => {
           </InfoRow>
           <InfoRow title="Ether Price">N/A</InfoRow>
           <InfoRow title="Hash">
-            <span className="font-hash">{block.hash}</span>
+            <HexValue value={block.hash} />
           </InfoRow>
           <InfoRow title="Parent Hash">
             <BlockLink blockTag={block.parentHash} />
           </InfoRow>
           <InfoRow title="Sha3Uncles">
-            <span className="font-hash">{block.sha3Uncles}</span>
+            <HexValue value={block.sha3Uncles} />
           </InfoRow>
           <InfoRow title="StateRoot">
-            <span className="font-hash">{block.stateRoot}</span>
+            <HexValue value={block.stateRoot} />
           </InfoRow>
           <InfoRow title="Nonce">
             <span className="font-data">{block.nonce}</span>

src/Home.tsx

@@ -1,9 +1,10 @@
-import React, { useState, useEffect } from "react";
+import React, { useState } from "react";
 import { NavLink, useHistory } from "react-router-dom";
 import { ethers } from "ethers";
 import Logo from "./Logo";
 import Timestamp from "./components/Timestamp";
-import { provider } from "./ethersconfig";
+import { useLatestBlock } from "./useLatestBlock";
+import { ERIGON_NODE } from "./ethersconfig";
 
 const Home: React.FC = () => {
   const [search, setSearch] = useState<string>();
@@ -24,29 +25,7 @@ const Home: React.FC = () => {
     history.push(`/search?q=${search}`);
   };
 
-  const [latestBlock, setLatestBlock] = useState<ethers.providers.Block>();
+  const latestBlock = useLatestBlock();
-  useEffect(() => {
-    const readLatestBlock = async () => {
-      const blockNum = await provider.getBlockNumber();
-      const _raw = await provider.send("erigon_getHeaderByNumber", [blockNum]);
-      const _block = provider.formatter.block(_raw);
-      setLatestBlock(_block);
-    };
-    readLatestBlock();
-
-    const listener = async (blockNumber: number) => {
-      const _raw = await provider.send("erigon_getHeaderByNumber", [
-        blockNumber,
-      ]);
-      const _block = provider.formatter.block(_raw);
-      setLatestBlock(_block);
-    };
-
-    provider.on("block", listener);
-    return () => {
-      provider.removeListener("block", listener);
-    };
-  }, []);
 
   document.title = "Home | Otterscan";
 
@@ -85,6 +64,9 @@ const Home: React.FC = () => {
               <Timestamp value={latestBlock.timestamp} />
             </NavLink>
           )}
+          <span className="mx-auto mt-5 text-xs text-gray-500">
+            Using Erigon node at {ERIGON_NODE}
+          </span>
         </form>
       </div>
     </div>

src/components/HexValue.tsx

@@ -0,0 +1,28 @@
+import React from "react";
+
+type HexValueProps = {
+  value: string;
+};
+
+const HexValue: React.FC<HexValueProps> = ({ value }) => {
+  const shards: string[] = [value.slice(0, 10)];
+  for (let i = 10; i < value.length; i += 8) {
+    shards.push(value.slice(i, i + 8));
+  }
+
+  return (
+    <>
+      {shards.map((s, i) => (
+        <span
+          className={`font-hash ${
+            i % 2 === 0 ? "text-black" : "text-gray-400"
+          }`}
+        >
+          {s}
+        </span>
+      ))}
+    </>
+  );
+};
+
+export default React.memo(HexValue);

src/components/NavButton.tsx

@@ -0,0 +1,31 @@
+import { NavLink } from "react-router-dom";
+
+type NavButtonProps = {
+  blockNum: number;
+  disabled?: boolean;
+};
+
+const NavButton: React.FC<NavButtonProps> = ({
+  blockNum,
+  disabled,
+  children,
+}) => {
+  if (disabled) {
+    return (
+      <span className="bg-link-blue bg-opacity-10 text-gray-400 rounded px-2 py-1 text-xs">
+        {children}
+      </span>
+    );
+  }
+
+  return (
+    <NavLink
+      className="transition-colors bg-link-blue bg-opacity-10 text-link-blue hover:bg-opacity-100 hover:text-white disabled:bg-link-blue disabled:text-gray-400 disabled:cursor-default rounded px-2 py-1 text-xs"
+      to={`/block/${blockNum}`}
+    >
+      {children}
+    </NavLink>
+  );
+};
+
+export default NavButton;

src/ethersconfig.ts

@@ -1,6 +1,8 @@
 import { ethers } from "ethers";
 
+export const ERIGON_NODE = "http://127.0.0.1:8545";
+
 export const provider = new ethers.providers.JsonRpcProvider(
-  "http://127.0.0.1:8545",
+  ERIGON_NODE,
   "mainnet"
 );

src/useLatestBlock.ts

@@ -0,0 +1,55 @@
+import { useState, useEffect } from "react";
+import { ethers } from "ethers";
+import { provider } from "./ethersconfig";
+
+export const useLatestBlock = () => {
+  const [latestBlock, setLatestBlock] = useState<ethers.providers.Block>();
+
+  useEffect(() => {
+    const readLatestBlock = async () => {
+      const blockNum = await provider.getBlockNumber();
+      const _raw = await provider.send("erigon_getHeaderByNumber", [blockNum]);
+      const _block = provider.formatter.block(_raw);
+      setLatestBlock(_block);
+    };
+    readLatestBlock();
+
+    const listener = async (blockNumber: number) => {
+      const _raw = await provider.send("erigon_getHeaderByNumber", [
+        blockNumber,
+      ]);
+      const _block = provider.formatter.block(_raw);
+      setLatestBlock(_block);
+    };
+
+    provider.on("block", listener);
+    return () => {
+      provider.removeListener("block", listener);
+    };
+  }, []);
+
+  return latestBlock;
+};
+
+export const useLatestBlockNumber = () => {
+  const [latestBlock, setLatestBlock] = useState<number>();
+
+  useEffect(() => {
+    const readLatestBlock = async () => {
+      const blockNum = await provider.getBlockNumber();
+      setLatestBlock(blockNum);
+    };
+    readLatestBlock();
+
+    const listener = async (blockNumber: number) => {
+      setLatestBlock(blockNumber);
+    };
+
+    provider.on("block", listener);
+    return () => {
+      provider.removeListener("block", listener);
+    };
+  }, []);
+
+  return latestBlock;
+};