From b144a208f843fe1957372441059348c5d60226b9 Mon Sep 17 00:00:00 2001
From: myh <95896306+Anchor-x@users.noreply.github.com>
Date: Wed, 5 Jun 2024 16:08:43 +0800
Subject: [PATCH] =?UTF-8?q?truffle=E8=BF=81=E7=A7=BB=E5=8A=9F=E8=83=BDSoli?=
 =?UTF-8?q?dity=E5=90=88=E7=BA=A6?=
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---
 contracts/Migrations.sol | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 contracts/Migrations.sol

diff --git a/contracts/Migrations.sol b/contracts/Migrations.sol
new file mode 100644
index 0000000..d5114c1
--- /dev/null
+++ b/contracts/Migrations.sol
@@ -0,0 +1,23 @@
+pragma solidity ^0.5.0;
+
+contract Migrations {
+    address public owner;
+    uint public last_completed_migration;
+
+    constructor() public {
+        owner = msg.sender;
+    }
+
+    modifier restricted() {
+        if (msg.sender == owner) _;
+    }
+
+    function setCompleted(uint completed) public restricted {
+        last_completed_migration = completed;
+    }
+
+    function upgrade(address new_address) public restricted {
+        Migrations upgraded = Migrations(new_address);
+        upgraded.setCompleted(last_completed_migration);
+    }
+}