diff --git a/scripts/exchange_test.ts b/scripts/exchange_test.ts
new file mode 100644
index 0000000..4f64a23
--- /dev/null
+++ b/scripts/exchange_test.ts
@@ -0,0 +1,83 @@
+import { ethers, upgrades } from "hardhat";
+import { DividendContract, Exchange } from "../typechain-types";
+import {mine} from "@nomicfoundation/hardhat-network-helpers";
+
+async function main() {
+    let signers = await ethers.getSigners()
+
+    console.log("signers 0:", signers[0].address)
+
+    let dmc = await (await ethers.deployContract("DMC", [ethers.parseEther("1000000000"), [signers[0].address], [ethers.parseEther("100000")]])).waitForDeployment()
+    let gwt = await (await ethers.deployContract("GWT", [[signers[0].address], [ethers.parseEther("10000000")]])).waitForDeployment()
+    //exchange = await(await ethers.deployContract("Exchange2", [await dmc.getAddress(), await gwt.getAddress(), ethers.ZeroAddress, 1000])).waitForDeployment();
+    let exchange = await (await upgrades.deployProxy(await ethers.getContractFactory("Exchange"), 
+        [await dmc.getAddress(), await gwt.getAddress(), ethers.ZeroAddress, 1000], 
+        {
+            initializer: "initialize",
+            kind: "uups",
+            timeout: 0
+        })).waitForDeployment() as unknown as Exchange;
+    console.log("exchange:", await exchange.getAddress());
+    
+    await (await gwt.enableMinter([await exchange.getAddress()])).wait();
+    await (await dmc.enableMinter([await exchange.getAddress()])).wait();
+
+    // 测试模式
+    await (await gwt.approve(await exchange.getAddress(), ethers.parseEther("210"))).wait();
+    await (await exchange.addFreeMintBalance(ethers.parseEther("210"))).wait();
+
+    await(await exchange.freeMintGWT()).wait()
+
+    await (await dmc.approve(await exchange.getAddress(), ethers.parseEther("1"))).wait();
+    await (await exchange.addFreeDMCTestMintBalance(ethers.parseEther("1"))).wait();
+
+    await (await gwt.approve(await exchange.getAddress(), ethers.parseEther("210"))).wait();
+    await (await exchange.GWTToDMCForTest(ethers.parseEther("210"))).wait();
+
+    mine(20, {interval: 1000});
+    await (await exchange.enableProdMode()).wait();
+
+    await (await dmc.approve(await exchange.getAddress(), ethers.parseEther("1"))).wait();
+
+        // 用1 DMC兑换GWT，能兑换1*210*1.2个
+    await (await exchange.DMCtoGWT(ethers.parseEther("1"))).wait();
+
+    // 前进到时间1000之后，开启下一轮
+    mine(2, {interval: 1000});
+
+    // 由于上一轮没有人兑换DMC，本轮的可兑换余额为210 + 210/1=420, rate变为210
+    // 我们兑换320个DMC出来，需要320*210=67200个GWT
+    await(await gwt.approve(await exchange.getAddress(), ethers.parseEther("67200"))).wait();
+    let tx = await exchange.GWTtoDMC(ethers.parseEther("67200"));
+    await tx.wait();
+
+
+    // 前进到时间1000之后，开启下一轮
+    mine(2, {interval: 1000});
+
+    // 上一轮剩余100，此轮的可兑换额度为210 + 100/2 = 260, 储存的可兑换额度为100/2=50
+    // 再兑换160个DMC，需要160*210=33600个GWT
+    await(await gwt.approve(await exchange.getAddress(), ethers.parseEther("33600"))).wait();
+    tx = await exchange.GWTtoDMC(ethers.parseEther("33600"));
+    await tx.wait();
+
+    // 前进到时间1000之后，开启下一轮
+    mine(2, {interval: 1000});
+
+    // 上一轮又剩余100，此轮的可兑换额度为210+(100+50)/3=260，储存的可兑换额度为100
+    // 这次我们把260个都兑换掉, 需要260*210=54600个GWT
+
+    await(await gwt.approve(await exchange.getAddress(), ethers.parseEther("54600"))).wait();
+    tx = await exchange.GWTtoDMC(ethers.parseEther("54600"));
+
+    await tx.wait();
+
+    // 前进到时间1000之后，开启下一轮
+    mine(2, {interval: 1000});
+    // 上一轮没有剩余，本轮的可兑换额度为210 + 100 / 2 = 260, 储存的可兑换额度为50
+    // 这次我们把260个都兑换掉, 需要260*210=54600个GWT
+    await(await gwt.approve(await exchange.getAddress(), ethers.parseEther("54600"))).wait();
+    tx = await exchange.GWTtoDMC(ethers.parseEther("54600"));
+}
+
+main().then(() => process.exit(0));
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