ctp: update AttestationStation to 1.1.0

Adds a new interface to the AttestationStation for single
attestations. Previously only an array of attestations
was able to be sent. This overloaded function makes it
more simple for smart contracts that want to attest to
data.

.changeset/strong-crabs-accept.md

+---
+'@eth-optimism/contracts-periphery': patch
+---
+
+Update the attestation station impl to 1.1.0

packages/contracts-periphery/.gas-snapshot

@@ -10,22 +10,23 @@ AssetReceiverTest:test_withdrawERC20withAmount() (gas: 182146)
 AssetReceiverTest:test_withdrawERC721() (gas: 49097)
 AssetReceiverTest:test_withdrawETH() (gas: 26179)
 AssetReceiverTest:test_withdrawETHwithAmount() (gas: 26108)
-AssetReceiverTest:test_attest_bulk() (gas: 592013)
-AssetReceiverTest:test_attest_single() (gas: 539644)
-OptimistTest:test_optimist_baseURI() (gas: 117016)
-OptimistTest:test_optimist_burn() (gas: 77691)
+AssetReceiverTest:test_attest_bulk() (gas: 614443)
+AssetReceiverTest:test_attest_individual() (gas: 541558)
+AssetReceiverTest:test_attest_single() (gas: 561966)
+OptimistTest:test_optimist_baseURI() (gas: 116809)
+OptimistTest:test_optimist_burn() (gas: 77525)
 OptimistTest:test_optimist_initialize() (gas: 23095)
-OptimistTest:test_optimist_is_on_allow_list() (gas: 52822)
-OptimistTest:test_optimist_mint_already_minted() (gas: 99125)
-OptimistTest:test_optimist_mint_happy_path() (gas: 99381)
+OptimistTest:test_optimist_is_on_allow_list() (gas: 52615)
+OptimistTest:test_optimist_mint_already_minted() (gas: 98910)
+OptimistTest:test_optimist_mint_happy_path() (gas: 99174)
 OptimistTest:test_optimist_mint_no_attestation() (gas: 15897)
-OptimistTest:test_optimist_mint_secondary_minter() (gas: 100782)
-OptimistTest:test_optimist_sbt_approve() (gas: 97490)
-OptimistTest:test_optimist_sbt_transfer() (gas: 102537)
-OptimistTest:test_optimist_set_approval_for_all() (gas: 101119)
+OptimistTest:test_optimist_mint_secondary_minter() (gas: 100575)
+OptimistTest:test_optimist_sbt_approve() (gas: 97283)
+OptimistTest:test_optimist_sbt_transfer() (gas: 102330)
+OptimistTest:test_optimist_set_approval_for_all() (gas: 100906)
 OptimistTest:test_optimist_supports_interface() (gas: 5797)
-OptimistTest:test_optimist_token_id_of_owner() (gas: 95251)
-OptimistTest:test_optimist_token_uri() (gas: 214371)
+OptimistTest:test_optimist_token_id_of_owner() (gas: 95044)
+OptimistTest:test_optimist_token_uri() (gas: 213949)
 TransactorTest:testFail_CALL() (gas: 15658)
 TransactorTest:testFail_DELEGATECALLL() (gas: 15632)
 TransactorTest:test_CALL() (gas: 26977)

packages/contracts-periphery/contracts/foundry-tests/AttestationStation.t.sol

@@ -26,6 +26,23 @@ contract AssetReceiverTest is AssetReceiver_Initializer {
         super._setUp();
     }
 
+    event AttestationCreated(
+        address indexed creator,
+        address indexed about,
+        bytes32 indexed key,
+        bytes val
+    );
+
+    function test_attest_individual() external {
+        AttestationStation attestationStation = new AttestationStation();
+
+        vm.expectEmit(true, true, true, true);
+        emit AttestationCreated(alice_attestor, bob, bytes32("foo"), bytes("bar"));
+
+        vm.prank(alice_attestor);
+        attestationStation.attest({ _about: bob, _key: bytes32("foo"), _val: bytes("bar") });
+    }
+
     function test_attest_single() external {
         AttestationStation attestationStation = new AttestationStation();
 

packages/contracts-periphery/contracts/universal/op-nft/AttestationStation.sol

@@ -44,31 +44,57 @@ contract AttestationStation is Semver {
     );
 
     /**
-     * @custom:semver 1.0.0
+     * @custom:semver 1.1.0
      */
-    constructor() Semver(1, 0, 0) {}
+    constructor() Semver(1, 1, 0) {}
+
+    /**
+     * @notice Allows anyone to create an attestation.
+     *
+     * @param _about Address that the attestation is about.
+     * @param _key   A key used to namespace the attestation.
+     * @param _val   An arbitrary value stored as part of the attestation.
+     */
+    function attest(
+        address _about,
+        bytes32 _key,
+        bytes memory _val
+    ) external {
+        _attest(_about, _key, _val);
+    }
 
     /**
      * @notice Allows anyone to create attestations.
      *
      * @param _attestations An array of attestation data.
      */
-    function attest(AttestationData[] memory _attestations) public {
+    function attest(AttestationData[] calldata _attestations) external {
         uint256 length = _attestations.length;
         for (uint256 i = 0; i < length; ) {
             AttestationData memory attestation = _attestations[i];
-            attestations[msg.sender][attestation.about][attestation.key] = attestation.val;
 
-            emit AttestationCreated(
-                msg.sender,
-                attestation.about,
-                attestation.key,
-                attestation.val
-            );
+            _attest(attestation.about, attestation.key, attestation.val);
 
             unchecked {
                 ++i;
             }
         }
     }
+
+    /**
+     * @notice Internal function that stores the attestation in a mapping.
+     *
+     * @param _about Address that the attestation is about.
+     * @param _key   A key used to namespace the attestation.
+     * @param _val   An arbitrary value stored as part of the attestation.
+     */
+    function _attest(
+        address _about,
+        bytes32 _key,
+        bytes memory _val
+    ) internal {
+        attestations[msg.sender][_about][_key] = _val;
+
+        emit AttestationCreated(msg.sender, _about, _key, _val);
+    }
 }