From 6a5ec80234ae053862a4cbc02a431b9b7b3e16fd Mon Sep 17 00:00:00 2001
From: Nick Barry <itsnickbarry@protonmail.ch>
Date: Sat, 15 Oct 2022 17:17:59 -0500
Subject: [PATCH] add draft precrime contracts

---
 .../precrime/ILayerZeroClientPrecrime.sol     | 11 ++++++++++
 .../ILayerZeroClientPrecrimeInternal.sol      |  7 +++++++
 .../precrime/LayerZeroClientPrecrime.sol      | 19 ++++++++++++++++++
 .../LayerZeroClientPrecrimeInternal.sol       | 20 +++++++++++++++++++
 .../LayerZeroClientPrecrimeStorage.sol        | 19 ++++++++++++++++++
 5 files changed, 76 insertions(+)
 create mode 100644 contracts/precrime/ILayerZeroClientPrecrime.sol
 create mode 100644 contracts/precrime/ILayerZeroClientPrecrimeInternal.sol
 create mode 100644 contracts/precrime/LayerZeroClientPrecrime.sol
 create mode 100644 contracts/precrime/LayerZeroClientPrecrimeInternal.sol
 create mode 100644 contracts/precrime/LayerZeroClientPrecrimeStorage.sol

diff --git a/contracts/precrime/ILayerZeroClientPrecrime.sol b/contracts/precrime/ILayerZeroClientPrecrime.sol
new file mode 100644
index 0000000..a255c57
--- /dev/null
+++ b/contracts/precrime/ILayerZeroClientPrecrime.sol
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import { ILayerZeroClientPrecrimeInternal } from './ILayerZeroClientPrecrimeInternal.sol';
+
+interface ILayerZeroClientPrecrime is ILayerZeroClientPrecrimeInternal {
+    function precrime() external view returns (address);
+
+    function setPrecrime(address precrime) external;
+}
diff --git a/contracts/precrime/ILayerZeroClientPrecrimeInternal.sol b/contracts/precrime/ILayerZeroClientPrecrimeInternal.sol
new file mode 100644
index 0000000..fc34367
--- /dev/null
+++ b/contracts/precrime/ILayerZeroClientPrecrimeInternal.sol
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+interface ILayerZeroClientPrecrimeInternal {
+    event SetPrecrime(address precrime);
+}
diff --git a/contracts/precrime/LayerZeroClientPrecrime.sol b/contracts/precrime/LayerZeroClientPrecrime.sol
new file mode 100644
index 0000000..a1809b5
--- /dev/null
+++ b/contracts/precrime/LayerZeroClientPrecrime.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import { ILayerZeroClientPrecrime } from './ILayerZeroClientPrecrime.sol';
+import { LayerZeroClientPrecrimeInternal } from './LayerZeroClientPrecrimeInternal.sol';
+
+abstract contract LayerZeroClientPrecrime is
+    ILayerZeroClientPrecrime,
+    LayerZeroClientPrecrimeInternal
+{
+    function precrime() external view returns (address) {
+        return _precrime();
+    }
+
+    function setPrecrime(address precrime) external {
+        return _setPrecrime(precrime);
+    }
+}
diff --git a/contracts/precrime/LayerZeroClientPrecrimeInternal.sol b/contracts/precrime/LayerZeroClientPrecrimeInternal.sol
new file mode 100644
index 0000000..45fa661
--- /dev/null
+++ b/contracts/precrime/LayerZeroClientPrecrimeInternal.sol
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import { ILayerZeroClientPrecrimeInternal } from './ILayerZeroClientPrecrimeInternal.sol';
+import { LayerZeroClientPrecrimeStorage } from './LayerZeroClientPrecrimeStorage.sol';
+
+abstract contract LayerZeroClientPrecrimeInternal is
+    ILayerZeroClientPrecrimeInternal
+{
+    function _precrime() internal view virtual returns (address) {
+        return LayerZeroClientPrecrimeStorage.layout().precrime;
+    }
+
+    function _setPrecrime(address precrime) internal virtual {
+        // TODO: onlyOwner
+        LayerZeroClientPrecrimeStorage.layout().precrime = precrime;
+        emit SetPrecrime(precrime);
+    }
+}
diff --git a/contracts/precrime/LayerZeroClientPrecrimeStorage.sol b/contracts/precrime/LayerZeroClientPrecrimeStorage.sol
new file mode 100644
index 0000000..0bb2dda
--- /dev/null
+++ b/contracts/precrime/LayerZeroClientPrecrimeStorage.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+library LayerZeroClientPrecrimeStorage {
+    struct Layout {
+        address precrime;
+    }
+
+    bytes32 internal constant STORAGE_SLOT =
+        keccak256('solidstate.contracts.storage.LayerZeroClientPrecrime');
+
+    function layout() internal pure returns (Layout storage l) {
+        bytes32 slot = STORAGE_SLOT;
+        assembly {
+            l.slot := slot
+        }
+    }
+}