feat(Identity): implement IdentityUpdate event [32]

abi/contracts/Identity.sol/Identity.json

@@ -79,6 +79,37 @@
     "name": "BatchMetadataUpdate",
     "type": "event"
   },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "address",
+        "name": "wallet",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "string",
+        "name": "platformId",
+        "type": "string"
+      },
+      {
+        "indexed": false,
+        "internalType": "string",
+        "name": "platformUserId",
+        "type": "string"
+      },
+      {
+        "indexed": false,
+        "internalType": "string",
+        "name": "platformUsername",
+        "type": "string"
+      }
+    ],
+    "name": "IdentityUpdate",
+    "type": "event"
+  },
   {
     "anonymous": false,
     "inputs": [

contracts/Identity.sol

@@ -18,6 +18,13 @@ contract Identity is IIdentity, ERC721URIStorage {
     using Counters for Counters.Counter;
     Counters.Counter private _tokenIds;
 
+    event IdentityUpdate(
+        address wallet,
+        string platformId,
+        string platformUserId,
+        string platformUsername
+    );
+
     string constant MSGPREFIX = "\x19Ethereum Signed Message:\n";
 
     bytes4 internal constant MAGICVALUE = 0x1626ba7e;
@@ -80,7 +87,12 @@ contract Identity is IIdentity, ERC721URIStorage {
 
         walletForPlatformUser[_platformId][_platformUserId] = _userAddress;
 
-        // TODO: emit wallet association event
+        emit IdentityUpdate(
+            _userAddress,
+            _platformId,
+            _platformUserId,
+            _platformUsername
+        );
     }
 
     function getTokenURI(string memory platformId, uint256 tokenId)

test/Identity.ts

@@ -31,6 +31,16 @@ describe("Identity", () => {
       expect(txn.hash).to.be.a.string;
     });
 
+    it("should emit an IdentityUpdate event", async () => {
+      // given
+      const { identity, signer, user } = await identityFixture();
+      const params = [user.address, "1", "123", "coder1"];
+      const signature = await mintSignature(params, signer);
+
+      // when/then
+      expect(await identity.mint(params[0], params[1], params[2], params[3], signature)).to.emit(identity, "IdentityUpdate").withArgs(params);
+    });
+
     it("fails to mint identity NFT with invalid signature", async () => {
       const { identity, user } = await identityFixture();
       const params = [user.address, "1", "123", "coder1"];