From af005d79ad22d96059265bde7d0915fe17527c8b Mon Sep 17 00:00:00 2001
From: Justin Starry <justin@solana.com>
Date: Sun, 12 Sep 2021 19:05:46 -0500
Subject: [PATCH] explorer: Display invoked programs in block transaction list
 (#19815)

---
 .../src/components/block/BlockHistoryCard.tsx | 225 +++++++++++++++++-
 1 file changed, 217 insertions(+), 8 deletions(-)

diff --git a/explorer/src/components/block/BlockHistoryCard.tsx b/explorer/src/components/block/BlockHistoryCard.tsx
index f92438dc7..039113164 100644
--- a/explorer/src/components/block/BlockHistoryCard.tsx
+++ b/explorer/src/components/block/BlockHistoryCard.tsx
@@ -1,37 +1,138 @@
 import React from "react";
-import { BlockResponse } from "@solana/web3.js";
+import { Link } from "react-router-dom";
+import { Location } from "history";
+import {
+  BlockResponse,
+  ConfirmedTransactionMeta,
+  TransactionSignature,
+  PublicKey,
+} from "@solana/web3.js";
 import { ErrorCard } from "components/common/ErrorCard";
 import { Signature } from "components/common/Signature";
+import { Address } from "components/common/Address";
+import { useQuery } from "utils/url";
+import { useCluster } from "providers/cluster";
+import { displayAddress } from "utils/tx";
 
 const PAGE_SIZE = 25;
 
+const useQueryFilter = (): string => {
+  const query = useQuery();
+  const filter = query.get("filter");
+  return filter || "";
+};
+
+type TransactionWithInvocations = {
+  index: number;
+  signature?: TransactionSignature;
+  meta: ConfirmedTransactionMeta | null;
+  invocations: Map<string, number>;
+};
+
 export function BlockHistoryCard({ block }: { block: BlockResponse }) {
   const [numDisplayed, setNumDisplayed] = React.useState(PAGE_SIZE);
+  const [showDropdown, setDropdown] = React.useState(false);
+  const filter = useQueryFilter();
 
-  if (block.transactions.length === 0) {
-    return <ErrorCard text="This block has no transactions" />;
+  const { transactions, invokedPrograms } = React.useMemo(() => {
+    const invokedPrograms = new Map<string, number>();
+
+    const transactions: TransactionWithInvocations[] = block.transactions.map(
+      (tx, index) => {
+        let signature: TransactionSignature | undefined;
+        if (tx.transaction.signatures.length > 0) {
+          signature = tx.transaction.signatures[0];
+        }
+
+        let programIndexes = tx.transaction.message.instructions.map(
+          (ix) => ix.programIdIndex
+        );
+        programIndexes.concat(
+          tx.meta?.innerInstructions?.flatMap((ix) => {
+            return ix.instructions.map((ix) => ix.programIdIndex);
+          }) || []
+        );
+
+        const indexMap = new Map<number, number>();
+        programIndexes.forEach((programIndex) => {
+          const count = indexMap.get(programIndex) || 0;
+          indexMap.set(programIndex, count + 1);
+        });
+
+        const invocations = new Map<string, number>();
+        for (const [i, count] of indexMap.entries()) {
+          const programId = tx.transaction.message.accountKeys[i].toBase58();
+          invocations.set(programId, count);
+          const programTransactionCount = invokedPrograms.get(programId) || 0;
+          invokedPrograms.set(programId, programTransactionCount + 1);
+        }
+
+        return {
+          index,
+          signature,
+          meta: tx.meta,
+          invocations,
+        };
+      }
+    );
+    return { transactions, invokedPrograms };
+  }, [block]);
+
+  const filteredTransactions = React.useMemo(() => {
+    // console.log("Filter: ", filter);
+    // console.log("invocations", transactions);
+    return transactions.filter(({ invocations }) => {
+      if (filter === ALL_TRANSACTIONS) {
+        return true;
+      }
+      return invocations.has(filter);
+    });
+  }, [transactions, filter]);
+
+  if (filteredTransactions.length === 0) {
+    const errorMessage =
+      filter === ALL_TRANSACTIONS
+        ? "This block has no transactions"
+        : "No transactions found with this filter";
+    return <ErrorCard text={errorMessage} />;
+  }
+
+  let title: string;
+  if (filteredTransactions.length === transactions.length) {
+    title = `Block Transactions (${filteredTransactions.length})`;
+  } else {
+    title = `Block Transactions`;
   }
 
   return (
     <div className="card">
       <div className="card-header align-items-center">
-        <h3 className="card-header-title">Block Transactions</h3>
+        <h3 className="card-header-title">{title}</h3>
+        <FilterDropdown
+          filter={filter}
+          toggle={() => setDropdown((show) => !show)}
+          show={showDropdown}
+          invokedPrograms={invokedPrograms}
+          totalTransactionCount={transactions.length}
+        ></FilterDropdown>
       </div>
 
       <div className="table-responsive mb-0">
         <table className="table table-sm table-nowrap card-table">
           <thead>
             <tr>
+              <th className="text-muted">#</th>
               <th className="text-muted">Result</th>
               <th className="text-muted">Transaction Signature</th>
+              <th className="text-muted">Invoked Programs</th>
             </tr>
           </thead>
           <tbody className="list">
-            {block.transactions.slice(0, numDisplayed).map((tx, i) => {
+            {filteredTransactions.slice(0, numDisplayed).map((tx, i) => {
               let statusText;
               let statusClass;
               let signature: React.ReactNode;
-              if (tx.meta?.err || tx.transaction.signatures.length === 0) {
+              if (tx.meta?.err || !tx.signature) {
                 statusClass = "warning";
                 statusText = "Failed";
               } else {
@@ -39,14 +140,18 @@ export function BlockHistoryCard({ block }: { block: BlockResponse }) {
                 statusText = "Success";
               }
 
-              if (tx.transaction.signatures.length > 0) {
+              if (tx.signature) {
                 signature = (
-                  <Signature signature={tx.transaction.signatures[0]} link />
+                  <Signature signature={tx.signature} link truncateChars={48} />
                 );
               }
 
+              const entries = [...tx.invocations.entries()];
+              entries.sort();
+
               return (
                 <tr key={i}>
+                  <td>{tx.index + 1}</td>
                   <td>
                     <span className={`badge badge-soft-${statusClass}`}>
                       {statusText}
@@ -54,6 +159,18 @@ export function BlockHistoryCard({ block }: { block: BlockResponse }) {
                   </td>
 
                   <td>{signature}</td>
+                  <td>
+                    {tx.invocations.size === 0
+                      ? "NA"
+                      : entries.map(([programId, count], i) => {
+                          return (
+                            <div key={i} className="d-flex align-items-center">
+                              <Address pubkey={new PublicKey(programId)} link />
+                              <span className="ml-2 text-muted">{`(${count})`}</span>
+                            </div>
+                          );
+                        })}
+                  </td>
                 </tr>
               );
             })}
@@ -76,3 +193,95 @@ export function BlockHistoryCard({ block }: { block: BlockResponse }) {
     </div>
   );
 }
+
+type FilterProps = {
+  filter: string;
+  toggle: () => void;
+  show: boolean;
+  invokedPrograms: Map<string, number>;
+  totalTransactionCount: number;
+};
+
+const ALL_TRANSACTIONS = "";
+
+type FilterOption = {
+  name: string;
+  programId: string;
+  transactionCount: number;
+};
+
+const FilterDropdown = ({
+  filter,
+  toggle,
+  show,
+  invokedPrograms,
+  totalTransactionCount,
+}: FilterProps) => {
+  const { cluster } = useCluster();
+  const buildLocation = (location: Location, filter: string) => {
+    const params = new URLSearchParams(location.search);
+    if (filter === ALL_TRANSACTIONS) {
+      params.delete("filter");
+    } else {
+      params.set("filter", filter);
+    }
+    return {
+      ...location,
+      search: params.toString(),
+    };
+  };
+
+  let currentFilterOption = {
+    name: "All Transactions",
+    programId: ALL_TRANSACTIONS,
+    transactionCount: totalTransactionCount,
+  };
+  const filterOptions: FilterOption[] = [currentFilterOption];
+  const placeholderRegistry = new Map();
+
+  [...invokedPrograms.entries()].forEach(([programId, transactionCount]) => {
+    const name = displayAddress(programId, cluster, placeholderRegistry);
+    if (filter === programId) {
+      currentFilterOption = {
+        programId,
+        name: `${name} Transactions (${transactionCount})`,
+        transactionCount,
+      };
+    }
+    filterOptions.push({ name, programId, transactionCount });
+  });
+
+  filterOptions.sort();
+
+  return (
+    <div className="dropdown mr-2">
+      <button
+        className="btn btn-white btn-sm dropdown-toggle"
+        type="button"
+        onClick={toggle}
+      >
+        {currentFilterOption.name}
+      </button>
+      <div
+        className={`token-filter dropdown-menu-right dropdown-menu${
+          show ? " show" : ""
+        }`}
+      >
+        {filterOptions.map(({ name, programId, transactionCount }) => {
+          return (
+            <Link
+              key={programId}
+              to={(location: Location) => buildLocation(location, programId)}
+              className={`dropdown-item${
+                programId === filter ? " active" : ""
+              }`}
+              onClick={toggle}
+            >
+              {`${name} (${transactionCount})`}
+            </Link>
+          );
+        })}
+      </div>
+    </div>
+  );
+};