Initial implementation of log decoding

src/Transaction.tsx

@@ -87,7 +87,7 @@ const Transaction: React.FC = () => {
               />
             </Route>
             <Route path="/tx/:txhash/logs/" exact>
-              <Logs txData={txData} />
+              <Logs txData={txData} metadata={metadata} />
             </Route>
           </Switch>
         </SelectionContext.Provider>

src/transaction/DecodedInput.tsx

@@ -7,12 +7,14 @@ type DecodedInputProps = {
 
 const DecodedInput: React.FC<DecodedInputProps> = ({ txDesc }) => (
   <table className="border rounded">
-    <thead className="grid grid-cols-12 text-left gap-x-1 py-2 bg-gray-100">
-      <th className="col-span-3 pl-1">
-        param <span className="text-gray-400 text-xs">(index)</span>
-      </th>
-      <th className="col-span-1">type</th>
-      <th className="col-span-8 pr-1">value</th>
+    <thead>
+      <tr className="grid grid-cols-12 text-left gap-x-1 py-2 bg-gray-100">
+        <th className="col-span-3 pl-1">
+          param <span className="text-gray-400 text-xs">(index)</span>
+        </th>
+        <th className="col-span-1">type</th>
+        <th className="col-span-8 pr-1">value</th>
+      </tr>
     </thead>
     <tbody className="divide-y">
       {txDesc.args.map((r, i) => (

src/transaction/DecodedLog.tsx

@@ -0,0 +1,34 @@
+import React from "react";
+import { LogDescription } from "@ethersproject/abi";
+
+type DecodedLogProps = {
+  logDesc: LogDescription;
+};
+
+const DecodedLog: React.FC<DecodedLogProps> = ({ logDesc }) => (
+  <table className="border rounded">
+    <thead>
+      <tr className="grid grid-cols-12 text-left gap-x-1 py-2 bg-gray-100">
+        <th className="col-span-3 pl-1">
+          param <span className="text-gray-400 text-xs">(index)</span>
+        </th>
+        <th className="col-span-1">type</th>
+        <th className="col-span-8 pr-1">value</th>
+      </tr>
+    </thead>
+    <tbody className="divide-y">
+      {logDesc.args.map((r, i) => (
+        <tr key={i} className="grid grid-cols-12 gap-x-1 py-2">
+          <td className="col-span-3 pl-1">
+            {logDesc.eventFragment.inputs[i].name}{" "}
+            <span className="text-gray-400 text-xs">({i})</span>
+          </td>
+          <td className="col-span-1">{logDesc.eventFragment.inputs[i].type}</td>
+          <td className="col-span-8 pr-1 font-code break-all">{r}</td>
+        </tr>
+      ))}
+    </tbody>
+  </table>
+);
+
+export default React.memo(DecodedLog);

src/transaction/DecodedLogSignature.tsx

@@ -0,0 +1,23 @@
+import React from "react";
+import { EventFragment } from "@ethersproject/abi";
+
+type DecodedLogSignatureProps = {
+  event: EventFragment;
+};
+
+const DecodedLogSignature: React.FC<DecodedLogSignatureProps> = ({ event }) => {
+  return (
+    <span>
+      <span className="text-blue-900 font-bold">{event.name}</span>(
+      {event.inputs.map((input, i) => (
+        <>
+          {i > 0 ? ", " : ""}
+          <span>{input.format("full")}</span>
+        </>
+      ))}
+      ){event.anonymous ? " anonymous" : ""}
+    </span>
+  );
+};
+
+export default React.memo(DecodedLogSignature);

src/transaction/LogEntry.tsx

@@ -0,0 +1,75 @@
+import React from "react";
+import { Log } from "@ethersproject/abstract-provider";
+import { LogDescription } from "@ethersproject/abi";
+import DecoratedAddressLink from "../components/DecoratedAddressLink";
+import DecodedLog from "./DecodedLog";
+import DecodedLogSignature from "./DecodedLogSignature";
+import { TransactionData } from "../types";
+
+type LogEntryProps = {
+  txData: TransactionData;
+  log: Log;
+  logDesc: LogDescription | null | undefined;
+};
+
+const LogEntry: React.FC<LogEntryProps> = ({ txData, log, logDesc }) => (
+  <div className="flex space-x-10 py-5">
+    <div>
+      <span className="rounded-full w-12 h-12 flex items-center justify-center bg-green-50 text-green-500">
+        {log.logIndex}
+      </span>
+    </div>
+    <div className="w-full space-y-2">
+      <div className="grid grid-cols-12 gap-x-3 gap-y-5 text-sm">
+        <div className="font-bold text-right">Address</div>
+        <div className="col-span-11 mr-auto">
+          <DecoratedAddressLink
+            address={log.address}
+            miner={log.address === txData.confirmedData?.miner}
+            txFrom={log.address === txData.from}
+            txTo={log.address === txData.to}
+          />
+        </div>
+      </div>
+      {logDesc && (
+        <div className="grid grid-cols-12 gap-x-3 gap-y-5 text-sm">
+          <div className="text-right">Signature</div>
+          <div className="flex space-x-2 items-center col-span-11 font-mono">
+            <DecodedLogSignature event={logDesc.eventFragment} />
+          </div>
+        </div>
+      )}
+      {logDesc && (
+        <div className="grid grid-cols-12 gap-x-3 gap-y-5 text-sm">
+          <div className="text-right">Name</div>
+          <div className="flex space-x-2 items-center col-span-11">
+            <DecodedLog logDesc={logDesc} />
+          </div>
+        </div>
+      )}
+      {log.topics.map((t, i) => (
+        <div className="grid grid-cols-12 gap-x-3 gap-y-5 text-sm" key={i}>
+          <div className="text-right">{i === 0 && "Topics"}</div>
+          <div className="flex space-x-2 items-center col-span-11 font-mono">
+            <span className="rounded bg-gray-100 text-gray-500 px-2 py-1 text-xs">
+              {i}
+            </span>
+            <span>{t}</span>
+          </div>
+        </div>
+      ))}
+      <div className="grid grid-cols-12 gap-x-3 gap-y-5 text-sm">
+        <div className="text-right pt-2">Data</div>
+        <div className="col-span-11">
+          <textarea
+            className="w-full h-40 bg-gray-50 font-mono focus:outline-none border rounded p-2"
+            value={log.data}
+            readOnly
+          />
+        </div>
+      </div>
+    </div>
+  </div>
+);
+
+export default React.memo(LogEntry);

src/transaction/Logs.tsx

@@ -1,63 +1,45 @@
-import React from "react";
+import React, { useMemo } from "react";
+import { Interface } from "@ethersproject/abi";
 import ContentFrame from "../ContentFrame";
-import DecoratedAddressLink from "../components/DecoratedAddressLink";
+import LogEntry from "./LogEntry";
 import { TransactionData } from "../types";
+import { Metadata } from "../useSourcify";
 
 type LogsProps = {
   txData: TransactionData;
+  metadata: Metadata | null | undefined;
 };
 
-const Logs: React.FC<LogsProps> = ({ txData }) => (
-  <ContentFrame tabs>
-    <div className="text-sm py-4">Transaction Receipt Event Logs</div>
-    {txData.confirmedData &&
-      txData.confirmedData.logs.map((l, i) => (
-        <div className="flex space-x-10 py-5" key={i}>
-          <div>
-            <span className="rounded-full w-12 h-12 flex items-center justify-center bg-green-50 text-green-500">
-              {l.logIndex}
-            </span>
-          </div>
-          <div className="w-full space-y-2">
-            <div className="grid grid-cols-12 gap-x-3 gap-y-5 text-sm">
-              <div className="font-bold text-right">Address</div>
-              <div className="col-span-11 mr-auto">
-                <DecoratedAddressLink
-                  address={l.address}
-                  miner={l.address === txData.confirmedData?.miner}
-                  txFrom={l.address === txData.from}
-                  txTo={l.address === txData.to}
-                />
-              </div>
-            </div>
-            {l.topics.map((t, i) => (
-              <div
-                className="grid grid-cols-12 gap-x-3 gap-y-5 text-sm"
-                key={i}
-              >
-                <div className="text-right">{i === 0 && "Topics"}</div>
-                <div className="flex space-x-2 items-center col-span-11 font-mono">
-                  <span className="rounded bg-gray-100 text-gray-500 px-2 py-1 text-xs">
-                    {i}
-                  </span>
-                  <span>{t}</span>
-                </div>
-              </div>
-            ))}
-            <div className="grid grid-cols-12 gap-x-3 gap-y-5 text-sm">
-              <div className="text-right pt-2">Data</div>
-              <div className="col-span-11">
-                <textarea
-                  className="w-full h-20 bg-gray-50 font-mono focus:outline-none border rounded p-2"
-                  value={l.data}
-                  readOnly
-                />
-              </div>
-            </div>
-          </div>
-        </div>
-      ))}
-  </ContentFrame>
-);
+const Logs: React.FC<LogsProps> = ({ txData, metadata }) => {
+  const logDesc = useMemo(() => {
+    if (!metadata || !txData) {
+      return undefined;
+    }
+
+    const abi = metadata.output.abi;
+    const intf = new Interface(abi as any);
+    return txData.confirmedData?.logs.map((l) =>
+      intf.parseLog({
+        topics: l.topics,
+        data: l.data,
+      })
+    );
+  }, [metadata, txData]);
+
+  return (
+    <ContentFrame tabs>
+      <div className="text-sm py-4">Transaction Receipt Event Logs</div>
+      {txData.confirmedData &&
+        txData.confirmedData.logs.map((l, i) => (
+          <LogEntry
+            key={i}
+            txData={txData}
+            log={l}
+            logDesc={logDesc && logDesc[i]}
+          />
+        ))}
+    </ContentFrame>
+  );
+};
 
 export default React.memo(Logs);

src/useSourcify.ts

@@ -133,7 +133,6 @@ export const useTransactionDescription = (
 
     const abi = metadata.output.abi;
     const intf = new Interface(abi as any);
-    console.log(intf);
     return intf.parseTransaction({
       data: txData.data,
       value: txData.value,