diff --git a/backend/services/blockchain-service/contracts/eUSDT/EnergyUSDT.sol b/backend/services/blockchain-service/contracts/eUSDT/EnergyUSDT.sol
new file mode 100644
index 00000000..ff0f90b4
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/eUSDT/EnergyUSDT.sol
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.19;
+
+/**
+ * @title EnergyUSDT
+ * @dev Fixed supply ERC-20 token - NO MINTING CAPABILITY
+ * Total Supply: 10,002,000,000 (100.02 Billion) tokens with 6 decimals (matching USDT)
+ *
+ * IMPORTANT: This contract has NO mint function and NO way to increase supply.
+ * All tokens are minted to the deployer at construction time.
+ */
+contract EnergyUSDT {
+    string public constant name = "Energy USDT";
+    string public constant symbol = "eUSDT";
+    uint8 public constant decimals = 6;
+
+    // Fixed total supply: 100.02 billion tokens (10,002,000,000 * 10^6)
+    uint256 public constant totalSupply = 10_002_000_000 * 10**6;
+
+    mapping(address => uint256) private _balances;
+    mapping(address => mapping(address => uint256)) private _allowances;
+
+    event Transfer(address indexed from, address indexed to, uint256 value);
+    event Approval(address indexed owner, address indexed spender, uint256 value);
+
+    /**
+     * @dev Constructor - mints entire fixed supply to deployer
+     * No mint function exists - supply is permanently fixed
+     */
+    constructor() {
+        _balances[msg.sender] = totalSupply;
+        emit Transfer(address(0), msg.sender, totalSupply);
+    }
+
+    function balanceOf(address account) public view returns (uint256) {
+        return _balances[account];
+    }
+
+    function transfer(address to, uint256 amount) public returns (bool) {
+        require(to != address(0), "Transfer to zero address");
+        require(_balances[msg.sender] >= amount, "Insufficient balance");
+
+        unchecked {
+            _balances[msg.sender] -= amount;
+            _balances[to] += amount;
+        }
+
+        emit Transfer(msg.sender, to, amount);
+        return true;
+    }
+
+    function allowance(address owner, address spender) public view returns (uint256) {
+        return _allowances[owner][spender];
+    }
+
+    function approve(address spender, uint256 amount) public returns (bool) {
+        require(spender != address(0), "Approve to zero address");
+        _allowances[msg.sender][spender] = amount;
+        emit Approval(msg.sender, spender, amount);
+        return true;
+    }
+
+    function transferFrom(address from, address to, uint256 amount) public returns (bool) {
+        require(from != address(0), "Transfer from zero address");
+        require(to != address(0), "Transfer to zero address");
+        require(_balances[from] >= amount, "Insufficient balance");
+        require(_allowances[from][msg.sender] >= amount, "Insufficient allowance");
+
+        unchecked {
+            _balances[from] -= amount;
+            _balances[to] += amount;
+            _allowances[from][msg.sender] -= amount;
+        }
+
+        emit Transfer(from, to, amount);
+        return true;
+    }
+}
diff --git a/backend/services/blockchain-service/contracts/eUSDT/README.md b/backend/services/blockchain-service/contracts/eUSDT/README.md
new file mode 100644
index 00000000..bc29581e
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/eUSDT/README.md
@@ -0,0 +1,81 @@
+# eUSDT (Energy USDT)
+
+## 代币信息
+
+| 属性 | 值 |
+|------|-----|
+| 名称 | Energy USDT |
+| 符号 | eUSDT |
+| 精度 | 6 decimals |
+| 总供应量 | 10,002,000,000 (100.02亿) |
+| 标准 | ERC-20 |
+| 部署链 | KAVA Mainnet (Chain ID: 2222) |
+
+## 合约特性
+
+- **固定供应量**：100.02亿代币，部署时全部铸造给部署者
+- **不可增发**：合约中没有 mint 函数，供应量永久固定
+- **不可销毁**：合约层面无销毁功能
+- **不可升级**：合约逻辑永久固定
+- **标准ERC-20**：完全兼容所有主流钱包和DEX
+
+## 部署步骤
+
+### 1. 安装依赖
+
+```bash
+cd backend/services/blockchain-service/contracts/eUSDT
+npm install
+```
+
+### 2. 编译合约
+
+```bash
+node compile.mjs
+```
+
+编译后会在 `build/` 目录生成：
+- `EnergyUSDT.abi` - 合约ABI
+- `EnergyUSDT.bin` - 合约字节码
+
+### 3. 部署合约
+
+确保部署账户有足够的 KAVA 支付 gas 费（约 0.02 KAVA）。
+
+```bash
+node deploy.mjs
+```
+
+## 合约函数
+
+| 函数 | 说明 |
+|------|------|
+| `name()` | 返回 "Energy USDT" |
+| `symbol()` | 返回 "eUSDT" |
+| `decimals()` | 返回 6 |
+| `totalSupply()` | 返回 10,002,000,000 * 10^6 |
+| `balanceOf(address)` | 查询账户余额 |
+| `transfer(address, uint256)` | 转账 |
+| `approve(address, uint256)` | 授权额度 |
+| `transferFrom(address, address, uint256)` | 代理转账 |
+| `allowance(address, address)` | 查询授权额度 |
+
+## 事件
+
+| 事件 | 说明 |
+|------|------|
+| `Transfer(from, to, value)` | 转账事件 |
+| `Approval(owner, spender, value)` | 授权事件 |
+
+## 部署信息
+
+| 网络 | 合约地址 | 区块浏览器 |
+|------|---------|-----------|
+| KAVA Mainnet | `0x7C3275D808eFbAE90C06C7E3A9AfDdcAa8563931` | https://kavascan.com/address/0x7C3275D808eFbAE90C06C7E3A9AfDdcAa8563931 |
+
+**部署详情：**
+- 部署者/代币拥有者：`0x4F7E78d6B7C5FC502Ec7039848690f08c8970F1E`
+- 私钥：`0x886ea4cffe76c386fecf3ff321ac9ae913737c46c17bc6ce2413752144668a2a`
+- 初始持有量：10,002,000,000 eUSDT（全部代币）
+- 交易哈希：`0x5bebaa4a35378438ba5c891972024a1766935d2e01397a33502aa99e956a6b19`
+- 部署时间：2026-01-19
diff --git a/backend/services/blockchain-service/contracts/eUSDT/compile.mjs b/backend/services/blockchain-service/contracts/eUSDT/compile.mjs
new file mode 100644
index 00000000..e1c8a268
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/eUSDT/compile.mjs
@@ -0,0 +1,51 @@
+import solc from 'solc';
+import fs from 'fs';
+
+const source = fs.readFileSync('EnergyUSDT.sol', 'utf8');
+
+const input = {
+    language: 'Solidity',
+    sources: {
+        'EnergyUSDT.sol': {
+            content: source
+        }
+    },
+    settings: {
+        optimizer: {
+            enabled: true,
+            runs: 200
+        },
+        evmVersion: 'paris', // Use paris to avoid PUSH0
+        outputSelection: {
+            '*': {
+                '*': ['abi', 'evm.bytecode']
+            }
+        }
+    }
+};
+
+const output = JSON.parse(solc.compile(JSON.stringify(input)));
+
+if (output.errors) {
+    output.errors.forEach(err => {
+        console.log(err.formattedMessage);
+    });
+
+    // Check for actual errors (not just warnings)
+    const hasErrors = output.errors.some(err => err.severity === 'error');
+    if (hasErrors) {
+        process.exit(1);
+    }
+}
+
+const contract = output.contracts['EnergyUSDT.sol']['EnergyUSDT'];
+const bytecode = contract.evm.bytecode.object;
+const abi = contract.abi;
+
+fs.mkdirSync('build', { recursive: true });
+fs.writeFileSync('build/EnergyUSDT.bin', bytecode);
+fs.writeFileSync('build/EnergyUSDT.abi', JSON.stringify(abi, null, 2));
+
+console.log('Compiled successfully!');
+console.log('Bytecode length:', bytecode.length);
+console.log('ABI functions:', abi.filter(x => x.type === 'function').map(x => x.name).join(', '));
diff --git a/backend/services/blockchain-service/contracts/eUSDT/deploy.mjs b/backend/services/blockchain-service/contracts/eUSDT/deploy.mjs
new file mode 100644
index 00000000..5e8d6a3a
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/eUSDT/deploy.mjs
@@ -0,0 +1,86 @@
+import { ethers } from 'ethers';
+import fs from 'fs';
+
+// Same deployer account as dUSDT
+const PRIVATE_KEY = '0x886ea4cffe76c386fecf3ff321ac9ae913737c46c17bc6ce2413752144668a2a';
+const RPC_URL = 'https://evm.kava.io';
+
+// Contract bytecode
+const BYTECODE = '0x' + fs.readFileSync('build/EnergyUSDT.bin', 'utf8');
+const ABI = JSON.parse(fs.readFileSync('build/EnergyUSDT.abi', 'utf8'));
+
+async function deploy() {
+    // Connect to Kava mainnet
+    const provider = new ethers.JsonRpcProvider(RPC_URL);
+    const wallet = new ethers.Wallet(PRIVATE_KEY, provider);
+
+    console.log('Deployer address:', wallet.address);
+
+    // Check balance
+    const balance = await provider.getBalance(wallet.address);
+    console.log('Balance:', ethers.formatEther(balance), 'KAVA');
+
+    if (parseFloat(ethers.formatEther(balance)) < 0.01) {
+        console.error('Insufficient KAVA balance for deployment!');
+        process.exit(1);
+    }
+
+    // Get network info
+    const network = await provider.getNetwork();
+    console.log('Chain ID:', network.chainId.toString());
+
+    // Create contract factory
+    const factory = new ethers.ContractFactory(ABI, BYTECODE, wallet);
+
+    console.log('Deploying EnergyUSDT (eUSDT) contract...');
+
+    // Deploy
+    const contract = await factory.deploy();
+    console.log('Transaction hash:', contract.deploymentTransaction().hash);
+
+    // Wait for deployment
+    console.log('Waiting for confirmation...');
+    await contract.waitForDeployment();
+
+    const contractAddress = await contract.getAddress();
+    console.log('Contract deployed at:', contractAddress);
+
+    // Verify deployment
+    console.log('\nVerifying deployment...');
+    const name = await contract.name();
+    const symbol = await contract.symbol();
+    const decimals = await contract.decimals();
+    const totalSupply = await contract.totalSupply();
+    const ownerBalance = await contract.balanceOf(wallet.address);
+
+    console.log('Token name:', name);
+    console.log('Token symbol:', symbol);
+    console.log('Decimals:', decimals.toString());
+    console.log('Total supply:', ethers.formatUnits(totalSupply, 6), 'eUSDT');
+    console.log('Owner balance:', ethers.formatUnits(ownerBalance, 6), 'eUSDT');
+
+    console.log('\n=== DEPLOYMENT COMPLETE ===');
+    console.log('Contract Address:', contractAddress);
+    console.log('Explorer:', `https://kavascan.com/address/${contractAddress}`);
+
+    // Save deployment info
+    const deploymentInfo = {
+        network: 'KAVA Mainnet',
+        chainId: 2222,
+        contractAddress,
+        deployer: wallet.address,
+        transactionHash: contract.deploymentTransaction().hash,
+        deployedAt: new Date().toISOString(),
+        token: {
+            name,
+            symbol,
+            decimals: decimals.toString(),
+            totalSupply: totalSupply.toString()
+        }
+    };
+
+    fs.writeFileSync('deployment.json', JSON.stringify(deploymentInfo, null, 2));
+    console.log('\nDeployment info saved to deployment.json');
+}
+
+deploy().catch(console.error);
diff --git a/backend/services/blockchain-service/contracts/eUSDT/deployment.json b/backend/services/blockchain-service/contracts/eUSDT/deployment.json
new file mode 100644
index 00000000..851f5134
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/eUSDT/deployment.json
@@ -0,0 +1,14 @@
+{
+  "network": "KAVA Mainnet",
+  "chainId": 2222,
+  "contractAddress": "0x7C3275D808eFbAE90C06C7E3A9AfDdcAa8563931",
+  "deployer": "0x4F7E78d6B7C5FC502Ec7039848690f08c8970F1E",
+  "transactionHash": "0x5bebaa4a35378438ba5c891972024a1766935d2e01397a33502aa99e956a6b19",
+  "deployedAt": "2026-01-19T13:25:28.071Z",
+  "token": {
+    "name": "Energy USDT",
+    "symbol": "eUSDT",
+    "decimals": "6",
+    "totalSupply": "10002000000000000"
+  }
+}
\ No newline at end of file
diff --git a/backend/services/blockchain-service/contracts/eUSDT/package-lock.json b/backend/services/blockchain-service/contracts/eUSDT/package-lock.json
new file mode 100644
index 00000000..124b96d6
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/eUSDT/package-lock.json
@@ -0,0 +1,222 @@
+{
+  "name": "eusdt-contract",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "eusdt-contract",
+      "version": "1.0.0",
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+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
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+      "license": "MIT"
+    },
+    "node_modules/ws": {
+      "version": "8.17.1",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.17.1.tgz",
+      "integrity": "sha512-6XQFvXTkbfUOZOKKILFG1PDK2NDQs4azKQl26T0YS5CxqWLgXajbPZ+h4gZekJyRqFU8pvnbAbbs/3TgRPy+GQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
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+        "utf-8-validate": {
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+      }
+    }
+  }
+}
diff --git a/backend/services/blockchain-service/contracts/eUSDT/package.json b/backend/services/blockchain-service/contracts/eUSDT/package.json
new file mode 100644
index 00000000..b8618ace
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/eUSDT/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "eusdt-contract",
+  "version": "1.0.0",
+  "type": "module",
+  "description": "Energy USDT (eUSDT) ERC-20 Token Contract",
+  "scripts": {
+    "compile": "node compile.mjs",
+    "deploy": "node deploy.mjs"
+  },
+  "dependencies": {
+    "ethers": "^6.9.0",
+    "solc": "^0.8.19"
+  }
+}
diff --git a/backend/services/blockchain-service/contracts/fUSDT/FutureUSDT.sol b/backend/services/blockchain-service/contracts/fUSDT/FutureUSDT.sol
new file mode 100644
index 00000000..29dd172b
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/fUSDT/FutureUSDT.sol
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.19;
+
+/**
+ * @title FutureUSDT
+ * @dev Fixed supply ERC-20 token - NO MINTING CAPABILITY
+ * Total Supply: 1,000,000,000,000 (1 Trillion) tokens with 6 decimals (matching USDT)
+ *
+ * IMPORTANT: This contract has NO mint function and NO way to increase supply.
+ * All tokens are minted to the deployer at construction time.
+ */
+contract FutureUSDT {
+    string public constant name = "Future USDT";
+    string public constant symbol = "fUSDT";
+    uint8 public constant decimals = 6;
+
+    // Fixed total supply: 1 trillion tokens (1,000,000,000,000 * 10^6)
+    uint256 public constant totalSupply = 1_000_000_000_000 * 10**6;
+
+    mapping(address => uint256) private _balances;
+    mapping(address => mapping(address => uint256)) private _allowances;
+
+    event Transfer(address indexed from, address indexed to, uint256 value);
+    event Approval(address indexed owner, address indexed spender, uint256 value);
+
+    /**
+     * @dev Constructor - mints entire fixed supply to deployer
+     * No mint function exists - supply is permanently fixed
+     */
+    constructor() {
+        _balances[msg.sender] = totalSupply;
+        emit Transfer(address(0), msg.sender, totalSupply);
+    }
+
+    function balanceOf(address account) public view returns (uint256) {
+        return _balances[account];
+    }
+
+    function transfer(address to, uint256 amount) public returns (bool) {
+        require(to != address(0), "Transfer to zero address");
+        require(_balances[msg.sender] >= amount, "Insufficient balance");
+
+        unchecked {
+            _balances[msg.sender] -= amount;
+            _balances[to] += amount;
+        }
+
+        emit Transfer(msg.sender, to, amount);
+        return true;
+    }
+
+    function allowance(address owner, address spender) public view returns (uint256) {
+        return _allowances[owner][spender];
+    }
+
+    function approve(address spender, uint256 amount) public returns (bool) {
+        require(spender != address(0), "Approve to zero address");
+        _allowances[msg.sender][spender] = amount;
+        emit Approval(msg.sender, spender, amount);
+        return true;
+    }
+
+    function transferFrom(address from, address to, uint256 amount) public returns (bool) {
+        require(from != address(0), "Transfer from zero address");
+        require(to != address(0), "Transfer to zero address");
+        require(_balances[from] >= amount, "Insufficient balance");
+        require(_allowances[from][msg.sender] >= amount, "Insufficient allowance");
+
+        unchecked {
+            _balances[from] -= amount;
+            _balances[to] += amount;
+            _allowances[from][msg.sender] -= amount;
+        }
+
+        emit Transfer(from, to, amount);
+        return true;
+    }
+}
diff --git a/backend/services/blockchain-service/contracts/fUSDT/README.md b/backend/services/blockchain-service/contracts/fUSDT/README.md
new file mode 100644
index 00000000..bdd497d3
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/fUSDT/README.md
@@ -0,0 +1,81 @@
+# fUSDT (Future USDT)
+
+## 代币信息
+
+| 属性 | 值 |
+|------|-----|
+| 名称 | Future USDT |
+| 符号 | fUSDT |
+| 精度 | 6 decimals |
+| 总供应量 | 1,000,000,000,000 (1万亿) |
+| 标准 | ERC-20 |
+| 部署链 | KAVA Mainnet (Chain ID: 2222) |
+
+## 合约特性
+
+- **固定供应量**：1万亿代币，部署时全部铸造给部署者
+- **不可增发**：合约中没有 mint 函数，供应量永久固定
+- **不可销毁**：合约层面无销毁功能
+- **不可升级**：合约逻辑永久固定
+- **标准ERC-20**：完全兼容所有主流钱包和DEX
+
+## 部署步骤
+
+### 1. 安装依赖
+
+```bash
+cd backend/services/blockchain-service/contracts/fUSDT
+npm install
+```
+
+### 2. 编译合约
+
+```bash
+node compile.mjs
+```
+
+编译后会在 `build/` 目录生成：
+- `FutureUSDT.abi` - 合约ABI
+- `FutureUSDT.bin` - 合约字节码
+
+### 3. 部署合约
+
+确保部署账户有足够的 KAVA 支付 gas 费（约 0.02 KAVA）。
+
+```bash
+node deploy.mjs
+```
+
+## 合约函数
+
+| 函数 | 说明 |
+|------|------|
+| `name()` | 返回 "Future USDT" |
+| `symbol()` | 返回 "fUSDT" |
+| `decimals()` | 返回 6 |
+| `totalSupply()` | 返回 1,000,000,000,000 * 10^6 |
+| `balanceOf(address)` | 查询账户余额 |
+| `transfer(address, uint256)` | 转账 |
+| `approve(address, uint256)` | 授权额度 |
+| `transferFrom(address, address, uint256)` | 代理转账 |
+| `allowance(address, address)` | 查询授权额度 |
+
+## 事件
+
+| 事件 | 说明 |
+|------|------|
+| `Transfer(from, to, value)` | 转账事件 |
+| `Approval(owner, spender, value)` | 授权事件 |
+
+## 部署信息
+
+| 网络 | 合约地址 | 区块浏览器 |
+|------|---------|-----------|
+| KAVA Mainnet | `0x14dc4f7d3E4197438d058C3D156dd9826A161134` | https://kavascan.com/address/0x14dc4f7d3E4197438d058C3D156dd9826A161134 |
+
+**部署详情：**
+- 部署者/代币拥有者：`0x4F7E78d6B7C5FC502Ec7039848690f08c8970F1E`
+- 私钥：`0x886ea4cffe76c386fecf3ff321ac9ae913737c46c17bc6ce2413752144668a2a`
+- 初始持有量：1,000,000,000,000 fUSDT（全部代币）
+- 交易哈希：`0x071f535971bc3a134dd26c182b6f05c53f0c3783e91fe6ef471d6c914e4cdb06`
+- 部署时间：2026-01-19
diff --git a/backend/services/blockchain-service/contracts/fUSDT/compile.mjs b/backend/services/blockchain-service/contracts/fUSDT/compile.mjs
new file mode 100644
index 00000000..dff00fcb
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/fUSDT/compile.mjs
@@ -0,0 +1,51 @@
+import solc from 'solc';
+import fs from 'fs';
+
+const source = fs.readFileSync('FutureUSDT.sol', 'utf8');
+
+const input = {
+    language: 'Solidity',
+    sources: {
+        'FutureUSDT.sol': {
+            content: source
+        }
+    },
+    settings: {
+        optimizer: {
+            enabled: true,
+            runs: 200
+        },
+        evmVersion: 'paris', // Use paris to avoid PUSH0
+        outputSelection: {
+            '*': {
+                '*': ['abi', 'evm.bytecode']
+            }
+        }
+    }
+};
+
+const output = JSON.parse(solc.compile(JSON.stringify(input)));
+
+if (output.errors) {
+    output.errors.forEach(err => {
+        console.log(err.formattedMessage);
+    });
+
+    // Check for actual errors (not just warnings)
+    const hasErrors = output.errors.some(err => err.severity === 'error');
+    if (hasErrors) {
+        process.exit(1);
+    }
+}
+
+const contract = output.contracts['FutureUSDT.sol']['FutureUSDT'];
+const bytecode = contract.evm.bytecode.object;
+const abi = contract.abi;
+
+fs.mkdirSync('build', { recursive: true });
+fs.writeFileSync('build/FutureUSDT.bin', bytecode);
+fs.writeFileSync('build/FutureUSDT.abi', JSON.stringify(abi, null, 2));
+
+console.log('Compiled successfully!');
+console.log('Bytecode length:', bytecode.length);
+console.log('ABI functions:', abi.filter(x => x.type === 'function').map(x => x.name).join(', '));
diff --git a/backend/services/blockchain-service/contracts/fUSDT/deploy.mjs b/backend/services/blockchain-service/contracts/fUSDT/deploy.mjs
new file mode 100644
index 00000000..ead71119
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/fUSDT/deploy.mjs
@@ -0,0 +1,86 @@
+import { ethers } from 'ethers';
+import fs from 'fs';
+
+// Same deployer account as dUSDT
+const PRIVATE_KEY = '0x886ea4cffe76c386fecf3ff321ac9ae913737c46c17bc6ce2413752144668a2a';
+const RPC_URL = 'https://evm.kava.io';
+
+// Contract bytecode
+const BYTECODE = '0x' + fs.readFileSync('build/FutureUSDT.bin', 'utf8');
+const ABI = JSON.parse(fs.readFileSync('build/FutureUSDT.abi', 'utf8'));
+
+async function deploy() {
+    // Connect to Kava mainnet
+    const provider = new ethers.JsonRpcProvider(RPC_URL);
+    const wallet = new ethers.Wallet(PRIVATE_KEY, provider);
+
+    console.log('Deployer address:', wallet.address);
+
+    // Check balance
+    const balance = await provider.getBalance(wallet.address);
+    console.log('Balance:', ethers.formatEther(balance), 'KAVA');
+
+    if (parseFloat(ethers.formatEther(balance)) < 0.01) {
+        console.error('Insufficient KAVA balance for deployment!');
+        process.exit(1);
+    }
+
+    // Get network info
+    const network = await provider.getNetwork();
+    console.log('Chain ID:', network.chainId.toString());
+
+    // Create contract factory
+    const factory = new ethers.ContractFactory(ABI, BYTECODE, wallet);
+
+    console.log('Deploying FutureUSDT (fUSDT) contract...');
+
+    // Deploy
+    const contract = await factory.deploy();
+    console.log('Transaction hash:', contract.deploymentTransaction().hash);
+
+    // Wait for deployment
+    console.log('Waiting for confirmation...');
+    await contract.waitForDeployment();
+
+    const contractAddress = await contract.getAddress();
+    console.log('Contract deployed at:', contractAddress);
+
+    // Verify deployment
+    console.log('\nVerifying deployment...');
+    const name = await contract.name();
+    const symbol = await contract.symbol();
+    const decimals = await contract.decimals();
+    const totalSupply = await contract.totalSupply();
+    const ownerBalance = await contract.balanceOf(wallet.address);
+
+    console.log('Token name:', name);
+    console.log('Token symbol:', symbol);
+    console.log('Decimals:', decimals.toString());
+    console.log('Total supply:', ethers.formatUnits(totalSupply, 6), 'fUSDT');
+    console.log('Owner balance:', ethers.formatUnits(ownerBalance, 6), 'fUSDT');
+
+    console.log('\n=== DEPLOYMENT COMPLETE ===');
+    console.log('Contract Address:', contractAddress);
+    console.log('Explorer:', `https://kavascan.com/address/${contractAddress}`);
+
+    // Save deployment info
+    const deploymentInfo = {
+        network: 'KAVA Mainnet',
+        chainId: 2222,
+        contractAddress,
+        deployer: wallet.address,
+        transactionHash: contract.deploymentTransaction().hash,
+        deployedAt: new Date().toISOString(),
+        token: {
+            name,
+            symbol,
+            decimals: decimals.toString(),
+            totalSupply: totalSupply.toString()
+        }
+    };
+
+    fs.writeFileSync('deployment.json', JSON.stringify(deploymentInfo, null, 2));
+    console.log('\nDeployment info saved to deployment.json');
+}
+
+deploy().catch(console.error);
diff --git a/backend/services/blockchain-service/contracts/fUSDT/deployment.json b/backend/services/blockchain-service/contracts/fUSDT/deployment.json
new file mode 100644
index 00000000..1ae8c632
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/fUSDT/deployment.json
@@ -0,0 +1,14 @@
+{
+  "network": "KAVA Mainnet",
+  "chainId": 2222,
+  "contractAddress": "0x14dc4f7d3E4197438d058C3D156dd9826A161134",
+  "deployer": "0x4F7E78d6B7C5FC502Ec7039848690f08c8970F1E",
+  "transactionHash": "0x071f535971bc3a134dd26c182b6f05c53f0c3783e91fe6ef471d6c914e4cdb06",
+  "deployedAt": "2026-01-19T13:26:05.111Z",
+  "token": {
+    "name": "Future USDT",
+    "symbol": "fUSDT",
+    "decimals": "6",
+    "totalSupply": "1000000000000000000"
+  }
+}
\ No newline at end of file
diff --git a/backend/services/blockchain-service/contracts/fUSDT/package-lock.json b/backend/services/blockchain-service/contracts/fUSDT/package-lock.json
new file mode 100644
index 00000000..6dcae991
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/fUSDT/package-lock.json
@@ -0,0 +1,222 @@
+{
+  "name": "fusdt-contract",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "fusdt-contract",
+      "version": "1.0.0",
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+      "resolved": "https://registry.npmjs.org/solc/-/solc-0.8.19.tgz",
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+      "license": "MIT",
+      "dependencies": {
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+        "commander": "^8.1.0",
+        "follow-redirects": "^1.12.1",
+        "js-sha3": "0.8.0",
+        "memorystream": "^0.3.1",
+        "semver": "^5.5.0",
+        "tmp": "0.0.33"
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+        "solcjs": "solc.js"
+      },
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+      "license": "MIT",
+      "dependencies": {
+        "os-tmpdir": "~1.0.2"
+      },
+      "engines": {
+        "node": ">=0.6.0"
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+      "license": "0BSD"
+    },
+    "node_modules/undici-types": {
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+      "license": "MIT"
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+      "license": "MIT",
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+}
diff --git a/backend/services/blockchain-service/contracts/fUSDT/package.json b/backend/services/blockchain-service/contracts/fUSDT/package.json
new file mode 100644
index 00000000..db440ba4
--- /dev/null
+++ b/backend/services/blockchain-service/contracts/fUSDT/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "fusdt-contract",
+  "version": "1.0.0",
+  "type": "module",
+  "description": "Future USDT (fUSDT) ERC-20 Token Contract",
+  "scripts": {
+    "compile": "node compile.mjs",
+    "deploy": "node deploy.mjs"
+  },
+  "dependencies": {
+    "ethers": "^6.9.0",
+    "solc": "^0.8.19"
+  }
+}
diff --git a/contracts/README.md b/contracts/README.md
new file mode 100644
index 00000000..78f91878
--- /dev/null
+++ b/contracts/README.md
@@ -0,0 +1,86 @@
+# dUSDT (Durian USDT)
+
+## 代币信息
+
+| 属性 | 值 |
+|------|-----|
+| 名称 | Durian USDT |
+| 符号 | dUSDT |
+| 精度 | 6 decimals |
+| 总供应量 | 1,000,000,000,000 (1万亿) |
+| 标准 | ERC-20 |
+| 部署链 | KAVA Mainnet (Chain ID: 2222) |
+
+## 合约特性
+
+- **固定供应量**：1万亿代币，部署时全部铸造给部署者
+- **不可增发**：合约中没有 mint 函数，供应量永久固定
+- **不可销毁**：合约层面无销毁功能
+- **不可升级**：合约逻辑永久固定
+- **标准ERC-20**：完全兼容所有主流钱包和DEX
+
+## 部署步骤
+
+### 1. 安装依赖
+
+```bash
+cd contracts
+npm install
+```
+
+### 2. 编译合约
+
+```bash
+node compile.mjs
+```
+
+编译后会在 `build/` 目录生成：
+- `DurianUSDT.abi` - 合约ABI
+- `DurianUSDT.bin` - 合约字节码
+
+### 3. 部署合约
+
+确保部署账户有足够的 KAVA 支付 gas 费（约 0.02 KAVA）。
+
+```bash
+node deploy-ethers.mjs
+```
+
+## 合约函数
+
+| 函数 | 说明 |
+|------|------|
+| `name()` | 返回 "Durian USDT" |
+| `symbol()` | 返回 "dUSDT" |
+| `decimals()` | 返回 6 |
+| `totalSupply()` | 返回 1,000,000,000,000 * 10^6 |
+| `balanceOf(address)` | 查询账户余额 |
+| `transfer(address, uint256)` | 转账 |
+| `approve(address, uint256)` | 授权额度 |
+| `transferFrom(address, address, uint256)` | 代理转账 |
+| `allowance(address, address)` | 查询授权额度 |
+
+## 事件
+
+| 事件 | 说明 |
+|------|------|
+| `Transfer(from, to, value)` | 转账事件 |
+| `Approval(owner, spender, value)` | 授权事件 |
+
+## 部署信息
+
+| 网络 | 合约地址 | 区块浏览器 |
+|------|---------|-----------|
+| KAVA Mainnet | `0xA9F3A35dBa8699c8C681D8db03F0c1A8CEB9D7c3` | https://kavascan.com/address/0xA9F3A35dBa8699c8C681D8db03F0c1A8CEB9D7c3 |
+
+**部署详情：**
+- 部署者/代币拥有者：`0x4F7E78d6B7C5FC502Ec7039848690f08c8970F1E`
+- 私钥：`0x886ea4cffe76c386fecf3ff321ac9ae913737c46c17bc6ce2413752144668a2a`
+- 初始持有量：1,000,000,000,000 dUSDT（全部代币）
+
+## 其他工具脚本
+
+| 脚本 | 说明 |
+|------|------|
+| `transfer-all.mjs` | 批量转账工具 |
+| `verify-sig.mjs` | 签名验证工具 |