diff --git "a/docs/white-book/03-\346\236\266\346\236\204\347\257\207/08-Amount\347\261\273\345\236\213\347\263\273\347\273\237/index.md" "b/docs/white-book/03-\346\236\266\346\236\204\347\257\207/08-Amount\347\261\273\345\236\213\347\263\273\347\273\237/index.md"
new file mode 100644
index 000000000..e1fabcc09
--- /dev/null
+++ "b/docs/white-book/03-\346\236\266\346\236\204\347\257\207/08-Amount\347\261\273\345\236\213\347\263\273\347\273\237/index.md"
@@ -0,0 +1,430 @@
+# Amount 类型系统
+
+> 类型安全的货币金额处理
+
+---
+
+## 概述
+
+`Amount` 类是 KeyApp 中处理所有货币金额的核心类型。它提供了类型安全的金额操作，避免了常见的精度问题和单位混淆。
+
+### 为什么需要 Amount 类型？
+
+在加密货币应用中，金额处理面临以下挑战：
+
+1. **精度问题**: JavaScript 的 `number` 类型无法精确表示大数值
+2. **单位混淆**: 混淆原始单位（如 wei）和格式化单位（如 ETH）
+3. **类型不安全**: 字符串表示的金额容易出错
+4. **缺乏元数据**: 金额需要知道其 decimals 和符号才能正确显示
+
+`Amount` 类通过封装这些复杂性，提供了统一、安全的金额处理方式。
+
+---
+
+## 核心设计
+
+### 不可变性
+
+`Amount` 实例是不可变的。所有算术操作返回新的 `Amount` 实例：
+
+```typescript
+const a = Amount.fromFormatted('1', 18, 'ETH')
+const b = Amount.fromFormatted('0.5', 18, 'ETH')
+const c = a.add(b)  // 返回新实例，a 和 b 不变
+```
+
+### 元数据
+
+每个 `Amount` 实例携带完整的元数据：
+
+```typescript
+interface AmountData {
+  _value: Big         // 精确的数值（使用 Big.js）
+  _decimals: number   // 小数位数
+  _symbol?: string    // 货币符号
+}
+```
+
+---
+
+## API 参考
+
+### 工厂方法
+
+#### `Amount.fromRaw(raw: string | bigint, decimals: number, symbol?: string)`
+
+从原始值（最小单位）创建 Amount。
+
+```typescript
+// 1 ETH = 10^18 wei
+const eth = Amount.fromRaw('1000000000000000000', 18, 'ETH')
+eth.toFormatted()  // "1"
+
+// 100 USDT = 10^8 最小单位
+const usdt = Amount.fromRaw('10000000000', 8, 'USDT')
+usdt.toFormatted()  // "100"
+```
+
+#### `Amount.fromFormatted(formatted: string | number, decimals: number, symbol?: string)`
+
+从格式化值（用户可读）创建 Amount。
+
+```typescript
+const eth = Amount.fromFormatted('1.5', 18, 'ETH')
+eth.toRawString()  // "1500000000000000000"
+
+const usdt = Amount.fromFormatted(100, 8, 'USDT')
+usdt.toRawString()  // "10000000000"
+```
+
+#### `Amount.zero(decimals: number, symbol?: string)`
+
+创建零值 Amount。
+
+```typescript
+const zero = Amount.zero(18, 'ETH')
+zero.isZero()  // true
+```
+
+### 转换方法
+
+#### `toRawString(): string`
+
+返回原始值的字符串表示（无小数点）。
+
+```typescript
+Amount.fromFormatted('1.5', 18, 'ETH').toRawString()
+// "1500000000000000000"
+```
+
+#### `toRawBigInt(): bigint`
+
+返回原始值的 bigint 表示。
+
+```typescript
+Amount.fromFormatted('1', 18, 'ETH').toRawBigInt()
+// 1000000000000000000n
+```
+
+#### `toFormatted(precision?: number): string`
+
+返回格式化的字符串表示。
+
+```typescript
+const eth = Amount.fromRaw('1234567890000000000', 18, 'ETH')
+eth.toFormatted()     // "1.23456789"
+eth.toFormatted(2)    // "1.23"
+eth.toFormatted(8)    // "1.23456789"
+```
+
+#### `toNumber(): number`
+
+返回 JavaScript number（可能有精度损失）。
+
+```typescript
+Amount.fromFormatted('1.5', 18, 'ETH').toNumber()  // 1.5
+```
+
+### 算术操作
+
+所有算术操作返回新的 `Amount` 实例。
+
+#### `add(other: Amount): Amount`
+
+加法。
+
+```typescript
+const a = Amount.fromFormatted('1', 18, 'ETH')
+const b = Amount.fromFormatted('0.5', 18, 'ETH')
+a.add(b).toFormatted()  // "1.5"
+```
+
+#### `subtract(other: Amount): Amount`
+
+减法。
+
+```typescript
+const a = Amount.fromFormatted('1', 18, 'ETH')
+const b = Amount.fromFormatted('0.3', 18, 'ETH')
+a.subtract(b).toFormatted()  // "0.7"
+```
+
+#### `multiply(factor: number | string): Amount`
+
+乘法（用于汇率转换等）。
+
+```typescript
+const eth = Amount.fromFormatted('2', 18, 'ETH')
+eth.multiply(1.5).toFormatted()  // "3"
+```
+
+#### `divide(divisor: number | string): Amount`
+
+除法。
+
+```typescript
+const eth = Amount.fromFormatted('10', 18, 'ETH')
+eth.divide(4).toFormatted()  // "2.5"
+```
+
+### 比较操作
+
+#### `isZero(): boolean`
+
+判断是否为零。
+
+#### `isPositive(): boolean`
+
+判断是否为正数。
+
+#### `isNegative(): boolean`
+
+判断是否为负数。
+
+#### `equals(other: Amount): boolean`
+
+判断是否相等。
+
+#### `greaterThan(other: Amount): boolean`
+
+判断是否大于。
+
+#### `lessThan(other: Amount): boolean`
+
+判断是否小于。
+
+#### `greaterThanOrEqual(other: Amount): boolean`
+
+判断是否大于等于。
+
+#### `lessThanOrEqual(other: Amount): boolean`
+
+判断是否小于等于。
+
+### 属性访问
+
+```typescript
+const eth = Amount.fromFormatted('1.5', 18, 'ETH')
+eth.decimals  // 18
+eth.symbol    // "ETH"
+```
+
+---
+
+## 序列化
+
+### JSON 序列化
+
+`Amount` 实现了 `toJSON()` 方法，返回可序列化的对象：
+
+```typescript
+const eth = Amount.fromFormatted('1.5', 18, 'ETH')
+JSON.stringify(eth)
+// {"raw":"1500000000000000000","decimals":18,"symbol":"ETH"}
+```
+
+### 从 JSON 恢复
+
+```typescript
+const json = { raw: '1500000000000000000', decimals: 18, symbol: 'ETH' }
+const eth = Amount.fromRaw(json.raw, json.decimals, json.symbol)
+```
+
+### Zod Schema
+
+用于验证 API 响应：
+
+```typescript
+import { z } from 'zod'
+import { Amount } from '@/types/amount'
+
+export const AmountSchema = z.object({
+  raw: z.string(),
+  decimals: z.number(),
+  symbol: z.string().optional(),
+}).transform(data => Amount.fromRaw(data.raw, data.decimals, data.symbol))
+```
+
+---
+
+## 使用场景
+
+### 资产余额
+
+```typescript
+interface AssetInfo {
+  assetType: string
+  name: string
+  amount: Amount        // 使用 Amount 类型
+  decimals: number
+  logo?: string
+}
+
+// 使用
+const asset: AssetInfo = {
+  assetType: 'ETH',
+  name: 'Ethereum',
+  amount: Amount.fromRaw('1500000000000000000', 18, 'ETH'),
+  decimals: 18,
+}
+
+// 显示
+console.log(`余额: ${asset.amount.toFormatted()} ${asset.assetType}`)
+```
+
+### 交易记录
+
+```typescript
+interface TransactionRecord {
+  id: string
+  type: 'send' | 'receive'
+  amount: Amount        // 交易金额
+  fee?: Amount          // 手续费
+  // ...
+}
+```
+
+### 发送交易
+
+```typescript
+// 用户输入
+const userInput = '1.5'
+const amount = Amount.fromFormatted(userInput, 18, 'ETH')
+
+// 验证余额
+if (amount.greaterThan(balance.amount)) {
+  throw new Error('余额不足')
+}
+
+// 构建交易（使用原始值）
+const rawAmount = amount.toRawBigInt()
+```
+
+### 费用显示
+
+```typescript
+const fee = Amount.fromRaw('2000000000000000', 18, 'ETH')
+console.log(`手续费: ${fee.toFormatted(6)} ETH`)  // "手续费: 0.002 ETH"
+```
+
+---
+
+## 最佳实践
+
+### 1. 始终使用工厂方法
+
+```typescript
+// ✅ 正确
+const amount = Amount.fromFormatted('1.5', 18, 'ETH')
+
+// ❌ 错误 - 不要直接构造
+const amount = new Amount(...)  // Amount 构造函数是私有的
+```
+
+### 2. 保持 decimals 一致
+
+在同一上下文中操作的 Amount 应该使用相同的 decimals：
+
+```typescript
+// ✅ 正确
+const a = Amount.fromFormatted('1', 18, 'ETH')
+const b = Amount.fromFormatted('0.5', 18, 'ETH')
+const c = a.add(b)
+
+// ❌ 危险 - decimals 不匹配
+const a = Amount.fromFormatted('1', 18, 'ETH')
+const b = Amount.fromFormatted('100', 6, 'USDT')  // 不同 decimals
+const c = a.add(b)  // 可能导致错误
+```
+
+### 3. 使用 toNumber() 谨慎
+
+`toNumber()` 可能有精度损失，仅用于显示目的：
+
+```typescript
+// ✅ 用于显示
+<AmountDisplay value={amount.toNumber()} />
+
+// ❌ 用于计算
+const result = amount.toNumber() * 2  // 可能丢失精度
+// ✅ 应该使用
+const result = amount.multiply(2)
+```
+
+### 4. API 边界转换
+
+在 API 边界进行 Amount 和原始值的转换：
+
+```typescript
+// 接收 API 响应
+const apiResponse = await fetch('/api/balance')
+const data = await apiResponse.json()
+const balance = Amount.fromRaw(data.balance, data.decimals, data.symbol)
+
+// 发送 API 请求
+const amount = Amount.fromFormatted(userInput, 18, 'ETH')
+await fetch('/api/transfer', {
+  body: JSON.stringify({
+    amount: amount.toRawString(),
+    // ...
+  })
+})
+```
+
+---
+
+## 迁移指南
+
+### 从 string 迁移
+
+```typescript
+// 旧代码
+interface OldAssetInfo {
+  amount: string  // "1.5"
+}
+
+// 新代码
+interface NewAssetInfo {
+  amount: Amount
+}
+
+// 迁移
+const oldAsset: OldAssetInfo = { amount: '1.5' }
+const newAsset: NewAssetInfo = {
+  amount: Amount.fromFormatted(oldAsset.amount, 18, 'ETH')
+}
+```
+
+### 从 bigint 迁移
+
+```typescript
+// 旧代码
+interface OldBalance {
+  raw: bigint      // 1500000000000000000n
+  formatted: string
+  decimals: number
+}
+
+// 新代码
+interface NewBalance {
+  amount: Amount
+}
+
+// 迁移
+const oldBalance: OldBalance = { 
+  raw: 1500000000000000000n, 
+  formatted: '1.5', 
+  decimals: 18 
+}
+const newBalance: NewBalance = {
+  amount: Amount.fromRaw(oldBalance.raw.toString(), oldBalance.decimals)
+}
+```
+
+---
+
+## 相关文档
+
+- [AmountDisplay 组件](../../05-组件篇/02-通用组件/AmountDisplay.md)
+- [ITransactionService](../../04-服务篇/02-链服务/ITransactionService.md)
+- [IAssetService](../../04-服务篇/02-链服务/IAssetService.md)
diff --git "a/docs/white-book/03-\346\236\266\346\236\204\347\257\207/index.md" "b/docs/white-book/03-\346\236\266\346\236\204\347\257\207/index.md"
index b0f0b5067..177afea94 100644
--- "a/docs/white-book/03-\346\236\266\346\236\204\347\257\207/index.md"
+++ "b/docs/white-book/03-\346\236\266\346\236\204\347\257\207/index.md"
@@ -53,6 +53,16 @@
 - 服务端状态：TanStack Query
 - 状态持久化策略
 
+### [第十四章：Amount 类型系统](./08-Amount类型系统/)
+
+定义类型安全的货币金额处理方案。
+
+**要点**：
+- Amount 不可变类型，携带 decimals 和 symbol 元数据
+- 工厂方法：fromRaw()、fromFormatted()、zero()
+- 精确算术操作，避免 JavaScript 浮点数精度问题
+- 序列化/反序列化支持
+
 ---
 
 ## 本篇来源
diff --git "a/docs/white-book/04-\346\234\215\345\212\241\347\257\207/02-\351\223\276\346\234\215\345\212\241/ITransactionService.md" "b/docs/white-book/04-\346\234\215\345\212\241\347\257\207/02-\351\223\276\346\234\215\345\212\241/ITransactionService.md"
index a6fcd5011..0678badd2 100644
--- "a/docs/white-book/04-\346\234\215\345\212\241\347\257\207/02-\351\223\276\346\234\215\345\212\241/ITransactionService.md"
+++ "b/docs/white-book/04-\346\234\215\345\212\241\347\257\207/02-\351\223\276\346\234\215\345\212\241/ITransactionService.md"
@@ -46,11 +46,11 @@ ITransactionService {
 
 ### TransferParams
 
-```
+```typescript
 TransferParams {
   from: Address           // 发送方地址
   to: Address             // 接收方地址
-  amount: bigint          // 发送金额（最小单位）
+  amount: Amount          // 发送金额（使用 Amount 类型）
   tokenAddress?: Address  // 代币地址（原生代币为空）
   memo?: string           // 备注（部分链支持）
   
@@ -62,9 +62,11 @@ TransferParams {
 }
 ```
 
+> 关于 Amount 类型的详细信息，请参阅 [Amount 类型系统](../../03-架构篇/08-Amount类型系统/index.md)。
+
 ### FeeEstimate
 
-```
+```typescript
 FeeEstimate {
   slow: Fee               // 慢速（~5分钟）
   standard: Fee           // 标准（~1分钟）
@@ -72,11 +74,10 @@ FeeEstimate {
 }
 
 Fee {
-  amount: bigint          // 费用金额
-  formatted: string       // 格式化显示
+  amount: Amount          // 费用金额（使用 Amount 类型）
   estimatedTime: number   // 预估确认时间（秒）
   gasLimit: bigint
-  gasPrice: bigint
+  gasPrice: Amount
 }
 ```
 
@@ -93,13 +94,13 @@ TransactionStatus {
 
 ### Transaction
 
-```
+```typescript
 Transaction {
   hash: TransactionHash
   from: Address
   to: Address
-  amount: bigint
-  fee: bigint
+  amount: Amount          // 交易金额（使用 Amount 类型）
+  fee: Amount             // 手续费（使用 Amount 类型）
   status: TransactionStatus
   timestamp: number
   blockNumber?: bigint
diff --git "a/docs/white-book/05-\347\273\204\344\273\266\347\257\207/02-\351\200\232\347\224\250\347\273\204\344\273\266/AmountDisplay.md" "b/docs/white-book/05-\347\273\204\344\273\266\347\257\207/02-\351\200\232\347\224\250\347\273\204\344\273\266/AmountDisplay.md"
index 66b515de4..7f1c0a54d 100644
--- "a/docs/white-book/05-\347\273\204\344\273\266\347\257\207/02-\351\200\232\347\224\250\347\273\204\344\273\266/AmountDisplay.md"
+++ "b/docs/white-book/05-\347\273\204\344\273\266\347\257\207/02-\351\200\232\347\224\250\347\273\204\344\273\266/AmountDisplay.md"
@@ -10,6 +10,7 @@
 
 ### 核心特性
 
+- **Amount 类型支持**: 直接接收 `Amount` 对象，自动提取元数据
 - **数字动画**: 数值变化时逐位平滑过渡动画
 - **加载状态**: 显示 "0" 配合呼吸动画，数据到达后平滑过渡到真实值
 - **完整可访问性**: 屏幕阅读器正确读取数值
@@ -17,13 +18,35 @@
 
 ---
 
+## 与 Amount 类型集成
+
+推荐使用 `Amount` 对象作为 value 属性，组件会自动提取 decimals 和 symbol：
+
+```tsx
+import { Amount } from '@/types/amount'
+import { AmountDisplay } from '@/components/amount-display'
+
+const balance = Amount.fromRaw('1500000000000000000', 18, 'ETH')
+
+// 使用 Amount 对象（推荐）
+<AmountDisplay value={balance} />
+// 自动显示: 1.5 ETH
+
+// 也支持直接使用 number
+<AmountDisplay value={balance.toNumber()} symbol="ETH" />
+```
+
+更多关于 Amount 类型的信息，请参阅 [Amount 类型系统](../../03-架构篇/08-Amount类型系统/index.md)。
+
+---
+
 ## 属性规范
 
 | 属性 | 类型 | 必需 | 默认值 | 说明 |
 |-----|------|-----|-------|------|
-| value | number \| bigint \| string | Y | - | 金额值 |
-| symbol | string | N | - | 货币符号 |
-| decimals | number | N | 8 | 小数位数 |
+| value | number \| bigint \| string \| Amount | Y | - | 金额值（推荐使用 Amount） |
+| symbol | string | N | - | 货币符号（使用 Amount 时自动提取） |
+| decimals | number | N | 8 | 小数位数（使用 Amount 时自动提取） |
 | sign | enum | N | 'never' | 符号显示模式 |
 | color | enum | N | 'default' | 颜色模式 |
 | size | enum | N | 'md' | 尺寸 |
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diff --git a/e2e/send-transaction.spec.ts b/e2e/send-transaction.spec.ts
new file mode 100644
index 000000000..2bb9c2a0d
--- /dev/null
+++ b/e2e/send-transaction.spec.ts
@@ -0,0 +1,270 @@
+import { test, expect, type Page } from '@playwright/test'
+
+/**
+ * 发送交易 E2E 测试
+ *
+ * 测试发送交易流程，特别是 Amount 类型相关的功能：
+ * - 金额输入和格式化
+ * - 余额验证
+ * - 手续费显示
+ * - 确认流程
+ */
+
+// 测试钱包数据（带余额）
+const TEST_WALLET_DATA = {
+  wallets: [
+    {
+      id: 'test-wallet-1',
+      name: '测试钱包',
+      address: '0x71C7656EC7ab88b098defB751B7401B5f6d8976F',
+      chain: 'ethereum',
+      chainAddresses: [
+        {
+          chain: 'ethereum',
+          address: '0x71C7656EC7ab88b098defB751B7401B5f6d8976F',
+          tokens: [
+            { symbol: 'ETH', balance: '1.5', decimals: 18 },
+            { symbol: 'USDT', balance: '1000', decimals: 6, contractAddress: '0xdAC17F958D2ee523a2206206994597C13D831ec7' },
+          ],
+        },
+        {
+          chain: 'bfmeta',
+          address: 'c7R6wVdPvHqvRxe5Q9ZvWr7CpPn5Mk5Xz3',
+          tokens: [
+            { symbol: 'BFM', balance: '10000', decimals: 8 },
+          ],
+        },
+      ],
+      encryptedMnemonic: { ciphertext: 'test', iv: 'test', salt: 'test' },
+      createdAt: Date.now(),
+      tokens: [],
+    },
+  ],
+  currentWalletId: 'test-wallet-1',
+  selectedChain: 'ethereum',
+}
+
+// 辅助函数：设置测试钱包
+async function setupTestWallet(page: Page, targetUrl: string = '/', language: string = 'en') {
+  await page.addInitScript((data) => {
+    localStorage.setItem('bfm_wallets', JSON.stringify(data.wallet))
+    localStorage.setItem('bfm_preferences', JSON.stringify({ language: data.lang, currency: 'USD' }))
+  }, { wallet: TEST_WALLET_DATA, lang: language })
+
+  const hashUrl = targetUrl === '/' ? '/' : `/#${targetUrl}`
+  await page.goto(hashUrl)
+  await page.waitForLoadState('networkidle')
+}
+
+async function waitForAppReady(page: Page) {
+  await page.locator('svg[aria-label="加载中"]').waitFor({ state: 'hidden', timeout: 10_000 }).catch(() => {})
+}
+
+// 获取发送页面的输入元素
+async function getSendPageInputs(page: Page) {
+  // 等待页面加载
+  await page.waitForSelector('h1', { timeout: 10000 })
+  
+  // 地址输入框通常是第一个文本输入框
+  const addressInput = page.locator('input').first()
+  // 金额输入框通常是第二个或有 placeholder="0" 的
+  const amountInput = page.locator('input[placeholder="0"], input').nth(1)
+  
+  return { addressInput, amountInput }
+}
+
+test.describe('发送交易 - 金额输入测试', () => {
+  test('输入有效金额', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    const { amountInput } = await getSendPageInputs(page)
+    
+    // 输入有效金额
+    await amountInput.fill('0.5')
+    
+    // 验证输入值
+    const value = await amountInput.inputValue()
+    expect(value).toBe('0.5')
+  })
+
+  test('输入超过余额的金额触发错误', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    const { addressInput, amountInput } = await getSendPageInputs(page)
+
+    // 填写有效地址
+    await addressInput.fill('0x1234567890abcdef1234567890abcdef12345678')
+
+    // 输入超过余额的金额（余额是 1.5 ETH）
+    await amountInput.fill('100')
+
+    // 等待验证
+    await page.waitForTimeout(300)
+
+    // 验证继续按钮被禁用
+    const continueBtn = page.locator('button:has-text("Continue"), button:has-text("继续"), [data-testid="send-continue-button"]')
+    await expect(continueBtn.first()).toBeDisabled()
+  })
+
+  test('清空金额后继续按钮禁用', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    const { addressInput, amountInput } = await getSendPageInputs(page)
+
+    // 填写有效数据
+    await addressInput.fill('0x1234567890abcdef1234567890abcdef12345678')
+    await amountInput.fill('0.1')
+
+    // 等待
+    await page.waitForTimeout(300)
+
+    // 清空金额
+    await amountInput.clear()
+
+    // 继续按钮应该禁用
+    const continueBtn = page.locator('button:has-text("Continue"), button:has-text("继续"), [data-testid="send-continue-button"]')
+    await expect(continueBtn.first()).toBeDisabled()
+  })
+
+  test('处理零金额', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    const { addressInput, amountInput } = await getSendPageInputs(page)
+
+    await addressInput.fill('0x1234567890abcdef1234567890abcdef12345678')
+    await amountInput.fill('0')
+
+    await page.waitForTimeout(300)
+
+    // 零金额应该禁用继续按钮
+    const continueBtn = page.locator('button:has-text("Continue"), button:has-text("继续"), [data-testid="send-continue-button"]')
+    await expect(continueBtn.first()).toBeDisabled()
+  })
+})
+
+test.describe('发送交易 - 确认流程测试', () => {
+  test('填写表单后按钮状态变化', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    const { addressInput, amountInput } = await getSendPageInputs(page)
+
+    // 验证初始状态按钮禁用
+    const continueBtn = page.locator('button:has-text("Continue"), button:has-text("继续"), [data-testid="send-continue-button"]')
+    await expect(continueBtn.first()).toBeDisabled()
+
+    // 只填写地址
+    await addressInput.fill('0x1234567890abcdef1234567890abcdef12345678')
+    await page.waitForTimeout(200)
+    
+    // 仍然禁用（没有金额）
+    await expect(continueBtn.first()).toBeDisabled()
+
+    // 填写金额
+    await amountInput.fill('0.1')
+    
+    // 等待状态更新（费用估算等）
+    await page.waitForTimeout(1000)
+
+    // 记录按钮最终状态（依赖 mock 服务配置）
+    const isEnabled = await continueBtn.first().isEnabled()
+    console.log(`Continue button enabled after form fill: ${isEnabled}`)
+  })
+
+  // 此测试需要 mock 服务正确配置，在某些环境可能跳过
+  test('点击继续按钮交互', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    const { addressInput, amountInput } = await getSendPageInputs(page)
+
+    await addressInput.fill('0x1234567890abcdef1234567890abcdef12345678')
+    await amountInput.fill('0.1')
+
+    await page.waitForTimeout(1000)
+
+    const continueBtn = page.locator('[data-testid="send-continue-button"]')
+    
+    // 检查按钮是否启用
+    const isEnabled = await continueBtn.isEnabled()
+    
+    if (isEnabled) {
+      // 如果启用，尝试点击
+      await continueBtn.click()
+      await page.waitForTimeout(500)
+      
+      // 检查是否有确认相关内容出现
+      const pageContent = await page.content()
+      const hasConfirmContent = pageContent.includes('确认') || pageContent.includes('Confirm') || pageContent.includes('0.1')
+      console.log(`Confirm content visible: ${hasConfirmContent}`)
+    } else {
+      console.log('Continue button not enabled - mock service may not be configured correctly')
+    }
+  })
+})
+
+test.describe('发送交易 - 截图测试', () => {
+  test('发送页面初始状态', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+    
+    await page.waitForSelector('h1', { timeout: 10000 })
+
+    await expect(page).toHaveScreenshot('send-page-initial.png')
+  })
+
+  test('发送页面填写表单后', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    const { addressInput, amountInput } = await getSendPageInputs(page)
+
+    await addressInput.fill('0x1234567890abcdef1234567890abcdef12345678')
+    await amountInput.fill('0.5')
+
+    await page.waitForTimeout(500)
+
+    await expect(page).toHaveScreenshot('send-page-filled.png')
+  })
+
+  test('发送页面余额不足', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    const { addressInput, amountInput } = await getSendPageInputs(page)
+
+    await addressInput.fill('0x1234567890abcdef1234567890abcdef12345678')
+    await amountInput.fill('999999')
+
+    await page.waitForTimeout(300)
+
+    await expect(page).toHaveScreenshot('send-page-insufficient.png')
+  })
+})
+
+test.describe('发送交易 - 金额格式化显示', () => {
+  test('页面显示格式化余额', async ({ page }) => {
+    await setupTestWallet(page, '/send')
+    await waitForAppReady(page)
+
+    await page.waitForSelector('h1', { timeout: 10000 })
+
+    // 验证页面上显示了格式化的余额（如 "1.5" 而不是 "1500000000000000000"）
+    // 余额应该小于 100（原始 wei 值会非常大）
+    const balanceText = await page.locator('text=/\\d+\\.?\\d*\\s*(ETH|Available|余额)/').first().textContent()
+    
+    if (balanceText) {
+      // 提取数字
+      const match = balanceText.match(/(\d+\.?\d*)/)
+      if (match) {
+        const balanceValue = parseFloat(match[1])
+        // 格式化后的余额应该是合理的数值（不是 wei）
+        expect(balanceValue).toBeLessThan(1000000)
+      }
+    }
+  })
+})
diff --git a/e2e/transaction-history.spec.ts b/e2e/transaction-history.spec.ts
new file mode 100644
index 000000000..ad5b54db8
--- /dev/null
+++ b/e2e/transaction-history.spec.ts
@@ -0,0 +1,244 @@
+import { test, expect, type Page } from '@playwright/test'
+
+/**
+ * 交易历史 E2E 测试
+ *
+ * 测试交易历史页面，特别是 Amount 类型相关的功能：
+ * - 交易金额显示格式化
+ * - 手续费显示
+ * - 交易详情页面
+ */
+
+// 测试钱包数据（带交易历史）
+const TEST_WALLET_DATA = {
+  wallets: [
+    {
+      id: 'test-wallet-1',
+      name: '测试钱包',
+      address: '0x71C7656EC7ab88b098defB751B7401B5f6d8976F',
+      chain: 'ethereum',
+      chainAddresses: [
+        {
+          chain: 'ethereum',
+          address: '0x71C7656EC7ab88b098defB751B7401B5f6d8976F',
+          tokens: [
+            { symbol: 'ETH', balance: '1.5', decimals: 18 },
+          ],
+        },
+      ],
+      encryptedMnemonic: { ciphertext: 'test', iv: 'test', salt: 'test' },
+      createdAt: Date.now(),
+      tokens: [],
+    },
+  ],
+  currentWalletId: 'test-wallet-1',
+  selectedChain: 'ethereum',
+}
+
+// 辅助函数：设置测试钱包
+async function setupTestWallet(page: Page, targetUrl: string = '/', language: string = 'en') {
+  await page.addInitScript((data) => {
+    localStorage.setItem('bfm_wallets', JSON.stringify(data.wallet))
+    localStorage.setItem('bfm_preferences', JSON.stringify({ language: data.lang, currency: 'USD' }))
+  }, { wallet: TEST_WALLET_DATA, lang: language })
+
+  const hashUrl = targetUrl === '/' ? '/' : `/#${targetUrl}`
+  await page.goto(hashUrl)
+  await page.waitForLoadState('networkidle')
+}
+
+async function waitForAppReady(page: Page) {
+  await page.locator('svg[aria-label="加载中"]').waitFor({ state: 'hidden', timeout: 10_000 }).catch(() => {})
+}
+
+test.describe('交易历史 - 金额显示测试', () => {
+  test('交易列表显示格式化金额', async ({ page }) => {
+    await setupTestWallet(page, '/history')
+    await waitForAppReady(page)
+
+    // 等待页面加载
+    await page.waitForTimeout(500)
+
+    // 如果有交易记录，验证金额格式
+    const transactionItems = page.locator('[data-testid="transaction-item"], [role="button"]:has(.font-mono)')
+    const count = await transactionItems.count()
+
+    if (count > 0) {
+      // 验证金额以格式化形式显示（带小数点和符号）
+      const firstItem = transactionItems.first()
+      await expect(firstItem.locator('text=/\\d+\\.?\\d*/')).toBeVisible()
+    }
+  })
+
+  test('交易历史页面截图 - 有交易', async ({ page }) => {
+    await setupTestWallet(page, '/history')
+    await waitForAppReady(page)
+
+    await page.waitForTimeout(500)
+
+    await expect(page).toHaveScreenshot('history-with-transactions.png')
+  })
+
+  test('交易历史过滤器工作正常', async ({ page }) => {
+    await setupTestWallet(page, '/history')
+    await waitForAppReady(page)
+
+    // 查找过滤器选择器
+    const chainFilter = page.locator('[aria-label*="链"], select[name="chain"], [data-testid="chain-filter"]')
+    const periodFilter = page.locator('[aria-label*="时间"], select[name="period"], [data-testid="period-filter"]')
+
+    // 如果过滤器存在，测试切换
+    if (await chainFilter.isVisible()) {
+      await chainFilter.selectOption({ index: 0 })
+      await page.waitForTimeout(300)
+    }
+
+    if (await periodFilter.isVisible()) {
+      await periodFilter.selectOption({ index: 0 })
+      await page.waitForTimeout(300)
+    }
+  })
+})
+
+test.describe('交易详情 - 金额显示测试', () => {
+  test('交易详情页面显示完整信息', async ({ page }) => {
+    // 直接访问交易详情页面（使用 mock 交易 ID）
+    await setupTestWallet(page, '/transaction/tx-1')
+    await waitForAppReady(page)
+
+    await page.waitForTimeout(500)
+
+    // 验证页面标题
+    const pageTitle = page.locator('[data-testid="page-title"], h1')
+    await expect(pageTitle).toBeVisible()
+  })
+
+  test('交易详情显示金额和手续费', async ({ page }) => {
+    await setupTestWallet(page, '/transaction/tx-1')
+    await waitForAppReady(page)
+
+    await page.waitForTimeout(500)
+
+    // 如果交易存在，验证金额和手续费显示
+    const amountDisplay = page.locator('[data-testid="transaction-amount"], .text-2xl, .text-xl')
+    if (await amountDisplay.first().isVisible()) {
+      // 验证金额格式化显示
+      await expect(amountDisplay.first()).toContainText(/\d/)
+    }
+  })
+
+  test('交易详情页面截图', async ({ page }) => {
+    await setupTestWallet(page, '/transaction/tx-1')
+    await waitForAppReady(page)
+
+    await page.waitForTimeout(500)
+
+    await expect(page).toHaveScreenshot('transaction-detail.png')
+  })
+})
+
+test.describe('交易历史 - 交互测试', () => {
+  test('点击交易项打开详情', async ({ page }) => {
+    await setupTestWallet(page, '/history')
+    await waitForAppReady(page)
+
+    await page.waitForTimeout(500)
+
+    // 查找交易项
+    const transactionItems = page.locator('[data-testid="transaction-item"], [role="button"]:has(.font-mono)')
+    const count = await transactionItems.count()
+
+    if (count > 0) {
+      // 点击第一个交易
+      await transactionItems.first().click()
+
+      // 验证导航到详情页面
+      await page.waitForURL(/\/#\/transaction\//)
+    }
+  })
+
+  test('返回按钮功能正常', async ({ page }) => {
+    await setupTestWallet(page, '/history')
+    await waitForAppReady(page)
+
+    // 点击返回按钮
+    const backButton = page.locator('[aria-label*="返回"], [aria-label*="back"], button:has(svg)')
+    if (await backButton.first().isVisible()) {
+      await backButton.first().click()
+      
+      // 验证返回到首页或上一页
+      await page.waitForTimeout(300)
+    }
+  })
+})
+
+test.describe('交易历史 - 空状态测试', () => {
+  test('无交易时显示空状态', async ({ page }) => {
+    // 使用一个新钱包（无交易历史）
+    const emptyWalletData = {
+      ...TEST_WALLET_DATA,
+      wallets: [{
+        ...TEST_WALLET_DATA.wallets[0],
+        id: 'empty-wallet',
+      }],
+      currentWalletId: 'empty-wallet',
+    }
+
+    await page.addInitScript((data) => {
+      localStorage.setItem('bfm_wallets', JSON.stringify(data))
+      localStorage.setItem('bfm_preferences', JSON.stringify({ language: 'en', currency: 'USD' }))
+    }, emptyWalletData)
+
+    await page.goto('/#/history')
+    await page.waitForLoadState('networkidle')
+    await waitForAppReady(page)
+
+    await page.waitForTimeout(500)
+
+    // 验证显示空状态消息
+    const emptyState = page.locator('text=/no.*transaction|暂无|empty/i')
+    // 空状态可能是预期的
+  })
+
+  test('空状态页面截图', async ({ page }) => {
+    const emptyWalletData = {
+      ...TEST_WALLET_DATA,
+      wallets: [{
+        ...TEST_WALLET_DATA.wallets[0],
+        id: 'empty-wallet-2',
+      }],
+      currentWalletId: 'empty-wallet-2',
+    }
+
+    await page.addInitScript((data) => {
+      localStorage.setItem('bfm_wallets', JSON.stringify(data))
+      localStorage.setItem('bfm_preferences', JSON.stringify({ language: 'en', currency: 'USD' }))
+    }, emptyWalletData)
+
+    await page.goto('/#/history')
+    await page.waitForLoadState('networkidle')
+    await waitForAppReady(page)
+
+    await page.waitForTimeout(500)
+
+    await expect(page).toHaveScreenshot('history-empty-state.png')
+  })
+})
+
+test.describe('交易历史 - 刷新功能测试', () => {
+  test('下拉刷新或刷新按钮', async ({ page }) => {
+    await setupTestWallet(page, '/history')
+    await waitForAppReady(page)
+
+    await page.waitForTimeout(500)
+
+    // 查找刷新按钮
+    const refreshButton = page.locator('[aria-label*="刷新"], [aria-label*="refresh"], button:has-text("刷新")')
+    if (await refreshButton.isVisible()) {
+      await refreshButton.click()
+      
+      // 等待刷新完成
+      await page.waitForTimeout(1000)
+    }
+  })
+})
diff --git a/src/components/asset/asset-item.stories.tsx b/src/components/asset/asset-item.stories.tsx
index 528b30193..8d3184c99 100644
--- a/src/components/asset/asset-item.stories.tsx
+++ b/src/components/asset/asset-item.stories.tsx
@@ -2,11 +2,12 @@ import type { Meta, StoryObj } from '@storybook/react'
 import { fn } from '@storybook/test'
 import { AssetItem } from './asset-item'
 import type { AssetInfo } from '@/types/asset'
+import { Amount } from '@/types/amount'
 
 const mockAsset: AssetInfo = {
   assetType: 'ETH',
   name: 'Ethereum',
-  amount: '1500000000000000000', // 1.5 ETH
+  amount: Amount.fromRaw('1500000000000000000', 18, 'ETH'), // 1.5 ETH
   decimals: 18,
 }
 
@@ -80,7 +81,7 @@ export const USDT: Story = {
     asset: {
       assetType: 'USDT',
       name: 'Tether USD',
-      amount: '100000000', // 100 USDT
+      amount: Amount.fromRaw('100000000', 6, 'USDT'), // 100 USDT
       decimals: 6,
       contractAddress: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
       priceUsd: 1,
@@ -94,7 +95,7 @@ export const Bitcoin: Story = {
     asset: {
       assetType: 'BTC',
       name: 'Bitcoin',
-      amount: '50000000', // 0.5 BTC
+      amount: Amount.fromRaw('50000000', 8, 'BTC'), // 0.5 BTC
       decimals: 8,
       priceUsd: 45000,
       priceChange24h: -1.5,
@@ -112,7 +113,7 @@ export const SmallAmount: Story = {
   args: {
     asset: {
       ...mockAsset,
-      amount: '1000000000000000', // 0.001 ETH
+      amount: Amount.fromRaw('1000000000000000', 18, 'ETH'), // 0.001 ETH
       priceUsd: 2500,
       priceChange24h: 2.3,
     },
diff --git a/src/components/asset/asset-item.test.tsx b/src/components/asset/asset-item.test.tsx
index acadabe34..10473cf09 100644
--- a/src/components/asset/asset-item.test.tsx
+++ b/src/components/asset/asset-item.test.tsx
@@ -2,12 +2,13 @@ import { describe, it, expect, vi } from 'vitest'
 import { render, screen, fireEvent } from '@testing-library/react'
 import { AssetItem } from './asset-item'
 import type { AssetInfo } from '@/types/asset'
+import { Amount } from '@/types/amount'
 
 describe('AssetItem', () => {
   const mockAsset: AssetInfo = {
     assetType: 'ETH',
     name: 'Ethereum',
-    amount: '1500000000000000000', // 1.5 ETH
+    amount: Amount.fromRaw('1500000000000000000', 18, 'ETH'), // 1.5 ETH
     decimals: 18,
     logoUrl: undefined,
   }
@@ -26,7 +27,7 @@ describe('AssetItem', () => {
   it('uses assetType as name when name is not provided', () => {
     const assetWithoutName: AssetInfo = {
       assetType: 'USDT',
-      amount: '100000000',
+      amount: Amount.fromRaw('100000000', 6, 'USDT'),
       decimals: 6,
     }
     render(<AssetItem asset={assetWithoutName} />)
@@ -76,7 +77,7 @@ describe('AssetItem', () => {
     const assetWithPrice: AssetInfo = {
       assetType: 'ETH',
       name: 'Ethereum',
-      amount: '1000000000000000000', // 1 ETH
+      amount: Amount.fromRaw('1000000000000000000', 18, 'ETH'), // 1 ETH
       decimals: 18,
       priceUsd: 2500,
       priceChange24h: 2.3,
diff --git a/src/components/asset/asset-item.tsx b/src/components/asset/asset-item.tsx
index a073ac529..a8be30796 100644
--- a/src/components/asset/asset-item.tsx
+++ b/src/components/asset/asset-item.tsx
@@ -1,6 +1,6 @@
 import { cn } from '@/lib/utils';
 import { TokenIcon } from '@/components/token/token-icon';
-import { formatAssetAmount, formatFiatValue, formatPriceChange, type AssetInfo } from '@/types/asset';
+import { formatFiatValue, formatPriceChange, type AssetInfo } from '@/types/asset';
 import { IconChevronRight as ChevronRight } from '@tabler/icons-react';
 
 export interface AssetItemProps {
@@ -30,11 +30,10 @@ export function AssetItem({
   exchangeRate,
   className,
 }: AssetItemProps) {
-  const formattedAmount = formatAssetAmount(asset.amount, asset.decimals);
+  const formattedAmount = asset.amount.toFormatted();
   const displayName = asset.name || asset.assetType;
 
   // Calculate fiat value if price is available
-  // Use exchange rate for conversion when currency is not USD
   const fiatValue =
     asset.priceUsd !== undefined
       ? formatFiatValue(asset.amount, asset.decimals, asset.priceUsd, {
diff --git a/src/components/asset/asset-list.stories.tsx b/src/components/asset/asset-list.stories.tsx
index 017b823a1..737ec7d27 100644
--- a/src/components/asset/asset-list.stories.tsx
+++ b/src/components/asset/asset-list.stories.tsx
@@ -2,31 +2,32 @@ import type { Meta, StoryObj } from '@storybook/react'
 import { fn } from '@storybook/test'
 import { AssetList } from './asset-list'
 import type { AssetInfo } from '@/types/asset'
+import { Amount } from '@/types/amount'
 
 const mockAssets: AssetInfo[] = [
   {
     assetType: 'ETH',
     name: 'Ethereum',
-    amount: '1500000000000000000',
+    amount: Amount.fromRaw('1500000000000000000', 18, 'ETH'),
     decimals: 18,
   },
   {
     assetType: 'USDT',
     name: 'Tether USD',
-    amount: '100000000',
+    amount: Amount.fromRaw('100000000', 6, 'USDT'),
     decimals: 6,
     contractAddress: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
   },
   {
     assetType: 'USDC',
     name: 'USD Coin',
-    amount: '50000000',
+    amount: Amount.fromRaw('50000000', 6, 'USDC'),
     decimals: 6,
   },
   {
     assetType: 'BTC',
     name: 'Bitcoin',
-    amount: '50000000',
+    amount: Amount.fromRaw('50000000', 8, 'BTC'),
     decimals: 8,
   },
 ]
@@ -81,13 +82,13 @@ export const ManyAssets: Story = {
       {
         assetType: 'TRX',
         name: 'TRON',
-        amount: '10000000000',
+        amount: Amount.fromRaw('10000000000', 6, 'TRX'),
         decimals: 6,
       },
       {
         assetType: 'BFM',
         name: 'BioForest Meta',
-        amount: '500000000000',
+        amount: Amount.fromRaw('500000000000', 8, 'BFM'),
         decimals: 8,
       },
     ],
diff --git a/src/components/asset/asset-list.test.tsx b/src/components/asset/asset-list.test.tsx
index 7c0cf222b..6b7ef40c4 100644
--- a/src/components/asset/asset-list.test.tsx
+++ b/src/components/asset/asset-list.test.tsx
@@ -2,6 +2,7 @@ import { describe, it, expect, vi } from 'vitest'
 import { render, screen, fireEvent } from '@testing-library/react'
 import { AssetList } from './asset-list'
 import type { AssetInfo } from '@/types/asset'
+import { Amount } from '@/types/amount'
 import { TestI18nProvider } from '@/test/i18n-mock'
 
 const renderWithI18n = (ui: React.ReactElement) => render(<TestI18nProvider>{ui}</TestI18nProvider>)
@@ -11,20 +12,20 @@ describe('AssetList', () => {
     {
       assetType: 'ETH',
       name: 'Ethereum',
-      amount: '1500000000000000000',
+      amount: Amount.fromRaw('1500000000000000000', 18, 'ETH'),
       decimals: 18,
     },
     {
       assetType: 'USDT',
       name: 'Tether USD',
-      amount: '100000000',
+      amount: Amount.fromRaw('100000000', 6, 'USDT'),
       decimals: 6,
       contractAddress: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
     },
     {
       assetType: 'BTC',
       name: 'Bitcoin',
-      amount: '50000000',
+      amount: Amount.fromRaw('50000000', 8, 'BTC'),
       decimals: 8,
     },
   ]
@@ -79,14 +80,14 @@ describe('AssetList', () => {
       {
         assetType: 'USDT',
         name: 'Tether (ETH)',
-        amount: '100000000',
+        amount: Amount.fromRaw('100000000', 6, 'USDT'),
         decimals: 6,
         contractAddress: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
       },
       {
         assetType: 'USDT',
         name: 'Tether (TRX)',
-        amount: '200000000',
+        amount: Amount.fromRaw('200000000', 6, 'USDT'),
         decimals: 6,
         contractAddress: 'TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t',
       },
diff --git a/src/components/transaction/transaction-item.stories.tsx b/src/components/transaction/transaction-item.stories.tsx
index 4f686b665..359855612 100644
--- a/src/components/transaction/transaction-item.stories.tsx
+++ b/src/components/transaction/transaction-item.stories.tsx
@@ -1,4 +1,5 @@
 import type { Meta, StoryObj } from '@storybook/react'
+import { Amount } from '@/types/amount'
 import { TransactionItem, type TransactionInfo } from './transaction-item'
 
 const meta: Meta<typeof TransactionItem> = {
@@ -14,7 +15,7 @@ const mockSend: TransactionInfo = {
   id: '1',
   type: 'send',
   status: 'confirmed',
-  amount: '100',
+  amount: Amount.fromFormatted('100', 6, 'USDT'),
   symbol: 'USDT',
   address: '0x1234567890abcdef1234567890abcdef12345678',
   timestamp: new Date(Date.now() - 3600000),
@@ -24,7 +25,7 @@ const mockReceive: TransactionInfo = {
   id: '2',
   type: 'receive',
   status: 'confirmed',
-  amount: '0.5',
+  amount: Amount.fromFormatted('0.5', 18, 'ETH'),
   symbol: 'ETH',
   address: 'TRX9876543210fedcba9876543210fedcba',
   timestamp: new Date(Date.now() - 86400000),
@@ -34,7 +35,7 @@ const mockPending: TransactionInfo = {
   id: '3',
   type: 'send',
   status: 'pending',
-  amount: '50',
+  amount: Amount.fromFormatted('50', 6, 'USDT'),
   symbol: 'USDT',
   address: '0xabcdef1234567890abcdef1234567890abcdef12',
   timestamp: new Date(),
@@ -44,7 +45,7 @@ const mockFailed: TransactionInfo = {
   id: '4',
   type: 'send',
   status: 'failed',
-  amount: '200',
+  amount: Amount.fromFormatted('200', 6, 'TRX'),
   symbol: 'TRX',
   address: 'TRX1111222233334444555566667777888899',
   timestamp: new Date(Date.now() - 7200000),
@@ -84,7 +85,7 @@ export const Swap: Story = {
       id: '5',
       type: 'swap',
       status: 'confirmed',
-      amount: '100',
+      amount: Amount.fromFormatted('100', 6, 'USDT'),
       symbol: 'USDT → ETH',
       address: '0xdex1234567890',
       timestamp: new Date(Date.now() - 1800000),
@@ -105,7 +106,7 @@ export const AllTypes: Story = {
           id: '5',
           type: 'stake',
           status: 'confirmed',
-          amount: '1000',
+          amount: Amount.fromFormatted('1000', 8, 'BFM'),
           symbol: 'BFM',
           address: '质押合约',
           timestamp: new Date(Date.now() - 172800000),
diff --git a/src/components/transaction/transaction-item.test.tsx b/src/components/transaction/transaction-item.test.tsx
index c005b699b..87764194f 100644
--- a/src/components/transaction/transaction-item.test.tsx
+++ b/src/components/transaction/transaction-item.test.tsx
@@ -2,6 +2,7 @@ import { describe, it, expect, vi } from 'vitest'
 import { render, screen } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import { TransactionItem, type TransactionInfo } from './transaction-item'
+import { Amount } from '@/types/amount'
 import { TestI18nProvider } from '@/test/i18n-mock'
 
 // 包装组件以提供 i18n
@@ -13,7 +14,7 @@ const mockTransaction: TransactionInfo = {
   id: '1',
   type: 'send',
   status: 'confirmed',
-  amount: '100',
+  amount: Amount.fromFormatted('100', 6, 'USDT'),
   symbol: 'USDT',
   address: '0x1234567890abcdef1234567890abcdef12345678',
   timestamp: new Date(),
diff --git a/src/components/transaction/transaction-item.tsx b/src/components/transaction/transaction-item.tsx
index 5448b5ba2..f2078cab3 100644
--- a/src/components/transaction/transaction-item.tsx
+++ b/src/components/transaction/transaction-item.tsx
@@ -1,5 +1,6 @@
 import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
+import type { Amount } from '@/types/amount';
 import { AddressDisplay } from '../wallet/address-display';
 import { AmountDisplay, TimeDisplay } from '../common';
 import {
@@ -19,7 +20,7 @@ export interface TransactionInfo {
   id: string;
   type: TransactionType;
   status: TransactionStatus;
-  amount: string;
+  amount: Amount;
   symbol: string;
   address: string;
   timestamp: Date | string;
@@ -54,6 +55,11 @@ export function TransactionItem({ transaction, onClick, className }: Transaction
   const isClickable = !!onClick;
   const Icon = typeIcon.Icon;
 
+  // Get the amount value for display
+  const amountValue = transaction.type === 'send'
+    ? -Math.abs(transaction.amount.toNumber())
+    : transaction.amount.toNumber();
+
   return (
     <div
       role={isClickable ? 'button' : undefined}
@@ -95,7 +101,7 @@ export function TransactionItem({ transaction, onClick, className }: Transaction
       {/* Amount & Time */}
       <div className="shrink-0 text-right">
         <AmountDisplay
-          value={transaction.type === 'send' ? -Math.abs(parseFloat(transaction.amount)) : transaction.amount}
+          value={amountValue}
           symbol={transaction.symbol}
           sign="always"
           color="auto"
diff --git a/src/components/transaction/transaction-list.stories.tsx b/src/components/transaction/transaction-list.stories.tsx
index df8e9fcd5..a9fe2776c 100644
--- a/src/components/transaction/transaction-list.stories.tsx
+++ b/src/components/transaction/transaction-list.stories.tsx
@@ -1,4 +1,5 @@
 import type { Meta, StoryObj } from '@storybook/react'
+import { Amount } from '@/types/amount'
 import { TransactionList } from './transaction-list'
 import type { TransactionInfo } from './transaction-item'
 import { GradientButton } from '../common/gradient-button'
@@ -18,7 +19,7 @@ const mockTransactions: TransactionInfo[] = [
     id: '1',
     type: 'send',
     status: 'confirmed',
-    amount: '100',
+    amount: Amount.fromFormatted('100', 6, 'USDT'),
     symbol: 'USDT',
     address: '0x1234567890abcdef1234567890abcdef12345678',
     timestamp: new Date(now - 3600000),
@@ -27,7 +28,7 @@ const mockTransactions: TransactionInfo[] = [
     id: '2',
     type: 'receive',
     status: 'confirmed',
-    amount: '0.5',
+    amount: Amount.fromFormatted('0.5', 18, 'ETH'),
     symbol: 'ETH',
     address: '0xabcdef1234567890abcdef1234567890abcdef12',
     timestamp: new Date(now - 7200000),
@@ -36,7 +37,7 @@ const mockTransactions: TransactionInfo[] = [
     id: '3',
     type: 'send',
     status: 'pending',
-    amount: '50',
+    amount: Amount.fromFormatted('50', 6, 'USDT'),
     symbol: 'USDT',
     address: '0x9876543210fedcba9876543210fedcba98765432',
     timestamp: new Date(now - 1800000),
@@ -45,7 +46,7 @@ const mockTransactions: TransactionInfo[] = [
     id: '4',
     type: 'receive',
     status: 'confirmed',
-    amount: '1000',
+    amount: Amount.fromFormatted('1000', 6, 'TRX'),
     symbol: 'TRX',
     address: 'TRX1234567890123456789012345678901234',
     timestamp: new Date(now - 86400000 - 3600000),
@@ -54,7 +55,7 @@ const mockTransactions: TransactionInfo[] = [
     id: '5',
     type: 'send',
     status: 'failed',
-    amount: '200',
+    amount: Amount.fromFormatted('200', 6, 'USDT'),
     symbol: 'USDT',
     address: '0xfedcba9876543210fedcba9876543210fedcba98',
     timestamp: new Date(now - 86400000 - 7200000),
@@ -63,7 +64,7 @@ const mockTransactions: TransactionInfo[] = [
     id: '6',
     type: 'stake',
     status: 'confirmed',
-    amount: '5000',
+    amount: Amount.fromFormatted('5000', 8, 'BFM'),
     symbol: 'BFM',
     address: '质押合约',
     timestamp: new Date(now - 172800000),
@@ -119,7 +120,7 @@ export const ManyTransactions: Story = {
         id: '7',
         type: 'receive',
         status: 'confirmed',
-        amount: '0.1',
+        amount: Amount.fromFormatted('0.1', 8, 'BTC'),
         symbol: 'BTC',
         address: 'bc1q123456789',
         timestamp: new Date(now - 259200000),
@@ -128,7 +129,7 @@ export const ManyTransactions: Story = {
         id: '8',
         type: 'swap',
         status: 'confirmed',
-        amount: '500',
+        amount: Amount.fromFormatted('500', 6, 'USDT'),
         symbol: 'USDT → ETH',
         address: 'DEX Router',
         timestamp: new Date(now - 345600000),
diff --git a/src/components/transaction/transaction-list.test.tsx b/src/components/transaction/transaction-list.test.tsx
index ffd34b0c0..d7d14cc76 100644
--- a/src/components/transaction/transaction-list.test.tsx
+++ b/src/components/transaction/transaction-list.test.tsx
@@ -3,6 +3,7 @@ import { render, screen } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import { TransactionList } from './transaction-list'
 import type { TransactionInfo } from './transaction-item'
+import { Amount } from '@/types/amount'
 import { TestI18nProvider } from '@/test/i18n-mock'
 
 // 包装组件以提供 i18n
@@ -19,7 +20,7 @@ const mockTransactions: TransactionInfo[] = [
     id: '1',
     type: 'send',
     status: 'confirmed',
-    amount: '100',
+    amount: Amount.fromFormatted('100', 6, 'USDT'),
     symbol: 'USDT',
     address: '0x1234567890abcdef1234567890abcdef12345678',
     timestamp: new Date(FIXED_NOW - 3600000), // 1 hour ago = today
@@ -28,7 +29,7 @@ const mockTransactions: TransactionInfo[] = [
     id: '2',
     type: 'receive',
     status: 'confirmed',
-    amount: '0.5',
+    amount: Amount.fromFormatted('0.5', 18, 'ETH'),
     symbol: 'ETH',
     address: '0xabcdef1234567890',
     timestamp: new Date(FIXED_NOW - 86400000 - 3600000), // 25 hours ago = yesterday
diff --git a/src/hooks/use-assets.ts b/src/hooks/use-assets.ts
index 01b76327a..2b6bfed6d 100644
--- a/src/hooks/use-assets.ts
+++ b/src/hooks/use-assets.ts
@@ -1,5 +1,6 @@
 import { useState, useCallback, useMemo } from 'react'
 import type { AssetInfo, ChainAssets, AssetState } from '@/types/asset'
+import { Amount } from '@/types/amount'
 
 /** Mock assets for development */
 const MOCK_ASSETS: ChainAssets[] = [
@@ -10,14 +11,14 @@ const MOCK_ASSETS: ChainAssets[] = [
       {
         assetType: 'ETH',
         name: 'Ethereum',
-        amount: '1500000000000000000', // 1.5 ETH
+        amount: Amount.fromRaw('1500000000000000000', 18, 'ETH'), // 1.5 ETH
         decimals: 18,
         logoUrl: undefined,
       },
       {
         assetType: 'USDT',
         name: 'Tether USD',
-        amount: '100000000', // 100 USDT
+        amount: Amount.fromRaw('100000000', 6, 'USDT'), // 100 USDT
         decimals: 6,
         contractAddress: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
         logoUrl: undefined,
@@ -25,7 +26,7 @@ const MOCK_ASSETS: ChainAssets[] = [
       {
         assetType: 'USDC',
         name: 'USD Coin',
-        amount: '50000000', // 50 USDC
+        amount: Amount.fromRaw('50000000', 6, 'USDC'), // 50 USDC
         decimals: 6,
         contractAddress: '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',
         logoUrl: undefined,
@@ -39,7 +40,7 @@ const MOCK_ASSETS: ChainAssets[] = [
       {
         assetType: 'BTC',
         name: 'Bitcoin',
-        amount: '50000000', // 0.5 BTC
+        amount: Amount.fromRaw('50000000', 8, 'BTC'), // 0.5 BTC
         decimals: 8,
         logoUrl: undefined,
       },
@@ -52,7 +53,7 @@ const MOCK_ASSETS: ChainAssets[] = [
       {
         assetType: 'TRX',
         name: 'TRON',
-        amount: '10000000000', // 10000 TRX
+        amount: Amount.fromRaw('10000000000', 6, 'TRX'), // 10000 TRX
         decimals: 6,
         logoUrl: undefined,
       },
@@ -65,7 +66,7 @@ const MOCK_ASSETS: ChainAssets[] = [
       {
         assetType: 'BFM',
         name: 'BioForest Meta',
-        amount: '500000000000', // 5000 BFM
+        amount: Amount.fromRaw('500000000000', 8, 'BFM'), // 5000 BFM
         decimals: 8,
         logoUrl: undefined,
       },
diff --git a/src/hooks/use-send.bioforest.ts b/src/hooks/use-send.bioforest.ts
index 60e0a81be..f6088344c 100644
--- a/src/hooks/use-send.bioforest.ts
+++ b/src/hooks/use-send.bioforest.ts
@@ -1,13 +1,12 @@
 import type { AssetInfo } from '@/types/asset'
 import type { ChainConfig } from '@/services/chain-config'
+import { Amount } from '@/types/amount'
 import { walletStorageService, WalletStorageError, WalletStorageErrorCode } from '@/services/wallet-storage'
 import { createBioforestAdapter } from '@/services/chain-adapter'
 import { deriveBioforestKeyFromChainConfig, hexToBytes } from '@/lib/crypto'
-import { parseAmountToBigInt } from './use-send.utils'
 
 export interface BioforestFeeResult {
-  formatted: string
-  raw: string
+  amount: Amount
   symbol: string
 }
 
@@ -16,12 +15,11 @@ export async function fetchBioforestFee(chainConfig: ChainConfig, fromAddress: s
   const feeEstimate = await adapter.transaction.estimateFee({
     from: fromAddress,
     to: fromAddress,
-    amount: 0n,
+    amount: Amount.zero(chainConfig.decimals, chainConfig.symbol),
   })
 
   return {
-    formatted: feeEstimate.standard.formatted,
-    raw: feeEstimate.standard.amount.toString(),
+    amount: feeEstimate.standard.amount,
     symbol: chainConfig.symbol,
   }
 }
@@ -33,8 +31,8 @@ export async function fetchBioforestBalance(chainConfig: ChainConfig, fromAddres
   return {
     assetType: balance.symbol,
     name: chainConfig.name,
-    amount: balance.raw.toString(),
-    decimals: balance.decimals,
+    amount: balance.amount,
+    decimals: balance.amount.decimals,
   }
 }
 
@@ -49,8 +47,7 @@ export interface SubmitBioforestParams {
   password: string
   fromAddress: string
   toAddress: string
-  amount: string
-  decimals: number
+  amount: Amount
 }
 
 export async function submitBioforestTransfer({
@@ -60,7 +57,6 @@ export async function submitBioforestTransfer({
   fromAddress,
   toAddress,
   amount,
-  decimals,
 }: SubmitBioforestParams): Promise<SubmitBioforestResult> {
   let secret: string
   try {
@@ -80,8 +76,7 @@ export async function submitBioforestTransfer({
     return { status: 'error', message: '签名地址不匹配' }
   }
 
-  const rawAmount = parseAmountToBigInt(amount, decimals)
-  if (rawAmount === null || rawAmount <= 0n) {
+  if (!amount.isPositive()) {
     return { status: 'error', message: '请输入有效金额' }
   }
 
@@ -90,7 +85,7 @@ export async function submitBioforestTransfer({
     const unsignedTx = await adapter.transaction.buildTransaction({
       from: fromAddress,
       to: toAddress,
-      amount: rawAmount,
+      amount,
     })
     const signedTx = await adapter.transaction.signTransaction(unsignedTx, hexToBytes(derived.privateKey))
     const txHash = await adapter.transaction.broadcastTransaction(signedTx)
diff --git a/src/hooks/use-send.constants.ts b/src/hooks/use-send.constants.ts
index 74baa4000..30f0753f1 100644
--- a/src/hooks/use-send.constants.ts
+++ b/src/hooks/use-send.constants.ts
@@ -17,8 +17,7 @@ export const initialState: SendState = {
   amount: '',
   addressError: null,
   amountError: null,
-  feeAmount: '0',
-  feeAmountRaw: '0',
+  feeAmount: null,
   feeSymbol: '',
   feeLoading: false,
   isSubmitting: false,
diff --git a/src/hooks/use-send.logic.ts b/src/hooks/use-send.logic.ts
index 52fea4419..f4c4f98d8 100644
--- a/src/hooks/use-send.logic.ts
+++ b/src/hooks/use-send.logic.ts
@@ -1,5 +1,5 @@
 import type { AssetInfo } from '@/types/asset'
-import { Amount, amountFromAsset } from '@/types/amount'
+import { Amount } from '@/types/amount'
 import { isValidBioforestAddress } from '@/lib/crypto'
 import { isValidAddress } from '@/components/transfer/address-input'
 
@@ -22,8 +22,7 @@ export function validateAmountInput(amount: string, asset: AssetInfo | null): st
   const inputAmount = Amount.tryFromFormatted(amount, asset.decimals)
   if (!inputAmount || !inputAmount.isPositive()) return '请输入有效金额'
 
-  const balance = amountFromAsset(asset)
-  if (inputAmount.gt(balance)) return '余额不足'
+  if (inputAmount.gt(asset.amount)) return '余额不足'
 
   return null
 }
@@ -40,14 +39,12 @@ export function canProceedToConfirm(options: {
   const inputAmount = Amount.tryFromFormatted(amount, asset.decimals)
   if (!inputAmount) return false
 
-  const balance = amountFromAsset(asset)
-
   return (
     toAddress.trim() !== '' &&
     amount.trim() !== '' &&
     isValidRecipientAddress(toAddress, isBioforestChain) &&
     inputAmount.isPositive() &&
-    inputAmount.lte(balance)
+    inputAmount.lte(asset.amount)
   )
 }
 
@@ -58,13 +55,12 @@ export type FeeAdjustResult =
 export function adjustAmountForFee(
   amount: string,
   asset: AssetInfo,
-  feeAmountRaw: string
+  fee: Amount
 ): FeeAdjustResult {
   const inputAmount = Amount.tryFromFormatted(amount, asset.decimals)
   if (!inputAmount) return { status: 'error', message: '请输入有效金额' }
 
-  const balance = amountFromAsset(asset)
-  const fee = Amount.fromRaw(feeAmountRaw || '0', asset.decimals)
+  const balance = asset.amount
 
   if (inputAmount.add(fee).lte(balance)) return { status: 'ok' }
   if (!inputAmount.eq(balance)) return { status: 'error', message: '余额不足' }
diff --git a/src/hooks/use-send.test.ts b/src/hooks/use-send.test.ts
index 974e93eb4..0ef75bfb0 100644
--- a/src/hooks/use-send.test.ts
+++ b/src/hooks/use-send.test.ts
@@ -1,12 +1,13 @@
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
 import { renderHook, act, waitFor } from '@testing-library/react'
 import { useSend } from './use-send'
+import { Amount } from '@/types/amount'
 import type { AssetInfo } from '@/types/asset'
 
 const mockAsset: AssetInfo = {
   assetType: 'ETH',
   name: 'Ethereum',
-  amount: '1000000000000000000', // 1 ETH
+  amount: Amount.fromRaw('1000000000000000000', 18, 'ETH'), // 1 ETH
   decimals: 18,
 }
 
@@ -105,7 +106,8 @@ describe('useSend', () => {
       })
 
       expect(result.current.state.feeLoading).toBe(false)
-      expect(result.current.state.feeAmount).toBe('0.002')
+      expect(result.current.state.feeAmount).not.toBeNull()
+      expect(result.current.state.feeAmount?.toFormatted()).toBe('0.002')
       expect(result.current.state.feeSymbol).toBe('ETH')
     })
   })
diff --git a/src/hooks/use-send.ts b/src/hooks/use-send.ts
index fff953593..6b8873acd 100644
--- a/src/hooks/use-send.ts
+++ b/src/hooks/use-send.ts
@@ -1,8 +1,8 @@
 import { useState, useCallback, useMemo, useEffect } from 'react'
 import type { AssetInfo } from '@/types/asset'
+import { Amount } from '@/types/amount'
 import { initialState, MOCK_FEES } from './use-send.constants'
 import type { SendState, UseSendOptions, UseSendReturn } from './use-send.types'
-import { parseAmountToBigInt } from './use-send.utils'
 import { fetchBioforestBalance, fetchBioforestFee, submitBioforestTransfer } from './use-send.bioforest'
 import { adjustAmountForFee, canProceedToConfirm, validateAddressInput, validateAmountInput } from './use-send.logic'
 import { submitMockTransfer } from './use-send.mock'
@@ -60,11 +60,10 @@ export function useSend(options: UseSendOptions = {}): UseSendReturn {
       // Mock fee estimation delay
       setTimeout(() => {
         const fee = MOCK_FEES[asset.assetType] ?? { amount: '0.001', symbol: asset.assetType }
-        const feeRaw = parseAmountToBigInt(fee.amount, asset.decimals) ?? 0n
+        const feeAmount = Amount.fromFormatted(fee.amount, asset.decimals, fee.symbol)
         setState((prev) => ({
           ...prev,
-          feeAmount: fee.amount,
-          feeAmountRaw: feeRaw.toString(),
+          feeAmount: feeAmount,
           feeSymbol: fee.symbol,
           feeLoading: false,
         }))
@@ -77,8 +76,7 @@ export function useSend(options: UseSendOptions = {}): UseSendReturn {
         const feeEstimate = await fetchBioforestFee(chainConfig, fromAddress)
         setState((prev) => ({
           ...prev,
-          feeAmount: feeEstimate.formatted,
-          feeAmountRaw: feeEstimate.raw,
+          feeAmount: feeEstimate.amount,
           feeSymbol: feeEstimate.symbol,
           feeLoading: false,
         }))
@@ -140,8 +138,8 @@ export function useSend(options: UseSendOptions = {}): UseSendReturn {
       return false
     }
 
-    if (state.asset) {
-      const adjustResult = adjustAmountForFee(state.amount, state.asset, state.feeAmountRaw)
+    if (state.asset && state.feeAmount) {
+      const adjustResult = adjustAmountForFee(state.amount, state.asset, state.feeAmount)
       if (adjustResult.status === 'error') {
         setState((prev) => ({
           ...prev,
@@ -164,7 +162,7 @@ export function useSend(options: UseSendOptions = {}): UseSendReturn {
       amountError: null,
     }))
     return true
-  }, [state.toAddress, state.amount, state.asset, state.feeAmountRaw, validateAddress, validateAmount])
+  }, [state.toAddress, state.amount, state.asset, state.feeAmount, validateAddress, validateAmount])
 
   // Go back to input
   const goBack = useCallback(() => {
@@ -223,14 +221,16 @@ export function useSend(options: UseSendOptions = {}): UseSendReturn {
       errorMessage: null,
     }))
 
+    // Convert formatted amount string to Amount object
+    const sendAmount = Amount.fromFormatted(state.amount, state.asset.decimals, state.asset.assetType)
+
     const result = await submitBioforestTransfer({
       chainConfig,
       walletId,
       password,
       fromAddress,
       toAddress: state.toAddress,
-      amount: state.amount,
-      decimals: state.asset.decimals,
+      amount: sendAmount,
     })
 
     if (result.status === 'password') {
diff --git a/src/hooks/use-send.types.ts b/src/hooks/use-send.types.ts
index 593844665..6d2eda642 100644
--- a/src/hooks/use-send.types.ts
+++ b/src/hooks/use-send.types.ts
@@ -1,4 +1,5 @@
 import type { AssetInfo } from '@/types/asset'
+import type { Amount } from '@/types/amount'
 import type { ChainConfig } from '@/services/chain-config'
 
 /** Send flow step */
@@ -22,9 +23,7 @@ export interface SendState {
   /** Amount validation error */
   amountError: string | null
   /** Estimated fee amount */
-  feeAmount: string
-  /** Estimated fee amount (raw smallest unit) */
-  feeAmountRaw: string
+  feeAmount: Amount | null
   /** Fee token symbol */
   feeSymbol: string
   /** Fee loading state */
diff --git a/src/hooks/use-transaction-history.test.ts b/src/hooks/use-transaction-history.test.ts
index 4e237fb99..74910d04a 100644
--- a/src/hooks/use-transaction-history.test.ts
+++ b/src/hooks/use-transaction-history.test.ts
@@ -1,6 +1,7 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest'
 import { renderHook, act, waitFor } from '@testing-library/react'
 import { useTransactionHistory } from './use-transaction-history'
+import { Amount } from '@/types/amount'
 import type { TransactionRecord as ServiceTransactionRecord } from '@/services/transaction'
 
 // Mock transaction data
@@ -9,14 +10,16 @@ const mockTransactions: ServiceTransactionRecord[] = [
     id: 'tx-1',
     type: 'send',
     status: 'confirmed',
-    amount: '1.5',
+    amount: Amount.fromFormatted('1.5', 18, 'ETH'),
     symbol: 'ETH',
+    decimals: 18,
     address: '0x1234567890abcdef1234567890abcdef12345678',
     timestamp: new Date(Date.now() - 1 * 24 * 60 * 60 * 1000), // 1 day ago
     hash: '0xhash1',
     chain: 'ethereum',
-    fee: '0.001',
+    fee: Amount.fromFormatted('0.001', 18, 'ETH'),
     feeSymbol: 'ETH',
+    feeDecimals: 18,
     blockNumber: 18000000,
     confirmations: 10,
   },
@@ -24,14 +27,16 @@ const mockTransactions: ServiceTransactionRecord[] = [
     id: 'tx-2',
     type: 'receive',
     status: 'confirmed',
-    amount: '100',
+    amount: Amount.fromFormatted('100', 6, 'USDT'),
     symbol: 'USDT',
+    decimals: 6,
     address: '0xabcdef1234567890abcdef1234567890abcdef12',
     timestamp: new Date(Date.now() - 5 * 24 * 60 * 60 * 1000), // 5 days ago
     hash: '0xhash2',
     chain: 'ethereum',
-    fee: '0.002',
+    fee: Amount.fromFormatted('0.002', 18, 'ETH'),
     feeSymbol: 'ETH',
+    feeDecimals: 18,
     blockNumber: 17999000,
     confirmations: 50,
   },
@@ -39,14 +44,16 @@ const mockTransactions: ServiceTransactionRecord[] = [
     id: 'tx-3',
     type: 'send',
     status: 'pending',
-    amount: '50',
+    amount: Amount.fromFormatted('50', 6, 'TRX'),
     symbol: 'TRX',
+    decimals: 6,
     address: 'TXYZ1234567890',
     timestamp: new Date(Date.now() - 40 * 24 * 60 * 60 * 1000), // 40 days ago
     hash: '0xhash3',
     chain: 'tron',
-    fee: '1',
+    fee: Amount.fromFormatted('1', 6, 'TRX'),
     feeSymbol: 'TRX',
+    feeDecimals: 6,
     blockNumber: undefined,
     confirmations: 0,
   },
diff --git a/src/hooks/use-transaction-history.ts b/src/hooks/use-transaction-history.ts
index e0a0a54bf..d03179293 100644
--- a/src/hooks/use-transaction-history.ts
+++ b/src/hooks/use-transaction-history.ts
@@ -1,6 +1,7 @@
 import { useState, useCallback, useEffect } from 'react'
 import type { ChainType } from '@/stores'
 import type { TransactionInfo } from '@/components/transaction/transaction-item'
+import { Amount } from '@/types/amount'
 import { transactionService, type TransactionRecord as ServiceTransactionRecord, type TransactionFilter as ServiceFilter } from '@/services/transaction'
 
 /** 交易历史过滤器 */
@@ -12,7 +13,7 @@ export interface TransactionFilter {
 /** 扩展的交易信息（包含链类型）- 保持与组件兼容 */
 export interface TransactionRecord extends TransactionInfo {
   chain: ChainType
-  fee: string | undefined
+  fee: Amount | undefined
   feeSymbol: string | undefined
   blockNumber: number | undefined
   confirmations: number | undefined
@@ -72,8 +73,9 @@ export function useTransactionHistory(walletId?: string): UseTransactionHistoryR
         type: undefined,
         status: undefined,
       }
-      const records = await transactionService.getHistory({ walletId, filter: serviceFilter })
-      setTransactions(records.map(convertToComponentFormat))
+      const rawRecords = await transactionService.getHistory({ walletId, filter: serviceFilter })
+      // Records from service already have Amount objects
+      setTransactions(rawRecords.map(convertToComponentFormat))
     } catch (e) {
       setError(e instanceof Error ? e.message : '加载交易历史失败')
     } finally {
diff --git a/src/pages/history/detail.test.tsx b/src/pages/history/detail.test.tsx
index 868888de0..55e3c44ee 100644
--- a/src/pages/history/detail.test.tsx
+++ b/src/pages/history/detail.test.tsx
@@ -1,6 +1,7 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest'
 import { render, screen } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
+import { Amount } from '@/types/amount'
 import { TransactionDetailPage } from './detail'
 import { TestI18nProvider } from '@/test/i18n-mock'
 
@@ -32,26 +33,26 @@ vi.mock('@/stores', async (importOriginal) => {
   }
 })
 
-// Mock transaction history hook
-const mockTransaction = {
+// Create mock transaction with Amount objects
+const createMockTransaction = () => ({
   id: 'tx-1',
   type: 'send' as const,
   status: 'confirmed' as const,
-  amount: '1.5',
+  amount: Amount.fromFormatted('1.5', 18, 'ETH'),
   symbol: 'ETH',
   address: '0x1234567890abcdef1234567890abcdef12345678',
   timestamp: new Date('2025-12-10T10:00:00Z'),
   hash: '0xabc123def456abc123def456abc123def456abc123def456abc123def456abc1',
   chain: 'ethereum' as const,
-  fee: '0.001',
+  fee: Amount.fromFormatted('0.001', 18, 'ETH'),
   feeSymbol: 'ETH',
   blockNumber: 18500000,
   confirmations: 50,
-}
+})
 
 vi.mock('@/hooks/use-transaction-history', () => ({
   useTransactionHistory: () => ({
-    transactions: [mockTransaction],
+    transactions: [createMockTransaction()],
     isLoading: false,
     error: undefined,
     filter: { chain: 'all', period: 'all' },
@@ -147,7 +148,7 @@ describe('TransactionDetailPage', () => {
       const copyButton = screen.getByText('复制哈希')
       await userEvent.click(copyButton)
 
-      expect(mockClipboardWrite).toHaveBeenCalledWith({ text: mockTransaction.hash })
+      expect(mockClipboardWrite).toHaveBeenCalledWith({ text: createMockTransaction().hash })
     })
 
     it('shows copied state after clicking', async () => {
diff --git a/src/pages/history/detail.tsx b/src/pages/history/detail.tsx
index a14996478..dacf0e04a 100644
--- a/src/pages/history/detail.tsx
+++ b/src/pages/history/detail.tsx
@@ -124,7 +124,7 @@ export function TransactionDetailPage() {
           <div className="text-center">
             <p className="text-muted-foreground text-sm">{t(`type.${transaction.type}`, { defaultValue: transaction.type })}</p>
             <AmountDisplay
-              value={transaction.type === 'send' ? -Math.abs(parseFloat(transaction.amount)) : transaction.amount}
+              value={transaction.type === 'send' ? -Math.abs(transaction.amount.toNumber()) : transaction.amount.toNumber()}
               symbol={transaction.symbol}
               sign="always"
               color="auto"
@@ -174,7 +174,7 @@ export function TransactionDetailPage() {
               <div className="flex items-center justify-between py-2">
                 <span className="text-muted-foreground text-sm">{t('detail.fee')}</span>
                 <FeeDisplay
-                  amount={transaction.fee}
+                  amount={transaction.fee.toNumber()}
                   symbol={transaction.feeSymbol || transaction.symbol}
                   className="text-sm"
                 />
diff --git a/src/pages/history/index.test.tsx b/src/pages/history/index.test.tsx
index 8450e52fe..25eb0b717 100644
--- a/src/pages/history/index.test.tsx
+++ b/src/pages/history/index.test.tsx
@@ -2,6 +2,7 @@ import { describe, it, expect, vi, beforeEach } from 'vitest'
 import { render, screen } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { Amount } from '@/types/amount'
 import { TransactionHistoryPage } from './index'
 import { TestI18nProvider } from '@/test/i18n-mock'
 
@@ -52,13 +53,13 @@ vi.mock('@/stores', async (importOriginal) => {
   }
 })
 
-// Mock transaction history hook
-const mockTransactions = [
+// Create mock transactions with Amount objects
+const createMockTransactions = () => [
   {
     id: 'tx-1',
     type: 'send' as const,
     status: 'confirmed' as const,
-    amount: '1.5',
+    amount: Amount.fromFormatted('1.5', 18, 'ETH'),
     symbol: 'ETH',
     address: '0x1234567890abcdef1234567890abcdef12345678',
     timestamp: new Date(),
@@ -69,7 +70,7 @@ const mockTransactions = [
     id: 'tx-2',
     type: 'receive' as const,
     status: 'confirmed' as const,
-    amount: '100',
+    amount: Amount.fromFormatted('100', 6, 'USDT'),
     symbol: 'USDT',
     address: '0xabcdef1234567890abcdef1234567890abcdef12',
     timestamp: new Date(Date.now() - 86400000), // Yesterday
@@ -81,7 +82,7 @@ const mockTransactions = [
 const mockSetFilter = vi.fn()
 vi.mock('@/queries', () => ({
   useTransactionHistoryQuery: () => ({
-    transactions: mockTransactions,
+    transactions: createMockTransactions(),
     isLoading: false,
     isFetching: false,
     error: undefined,
diff --git a/src/pages/send/index.tsx b/src/pages/send/index.tsx
index 3ac34afac..078f502fe 100644
--- a/src/pages/send/index.tsx
+++ b/src/pages/send/index.tsx
@@ -12,7 +12,7 @@ import { TransferConfirmSheet } from '@/components/transfer/transfer-confirm-she
 import { SendResult } from '@/components/transfer/send-result';
 import { useCamera, useToast, useHaptics } from '@/services';
 import { useSend } from '@/hooks/use-send';
-import { formatAssetAmount } from '@/types/asset';
+import { Amount } from '@/types/amount';
 import { IconChevronRight as ArrowRight } from '@tabler/icons-react';
 import {
   useChainConfigState,
@@ -65,10 +65,11 @@ export function SendPage() {
   const defaultAsset = useMemo(() => {
     if (!chainConfig) return null;
     const nativeBalance = currentChainAddress?.tokens.find((token) => token.symbol === chainConfig.symbol);
+    const balanceFormatted = nativeBalance?.balance ?? '0';
     return {
       assetType: chainConfig.symbol,
       name: chainConfig.name,
-      amount: nativeBalance?.balance ?? '0',
+      amount: Amount.fromFormatted(balanceFormatted, chainConfig.decimals, chainConfig.symbol),
       decimals: chainConfig.decimals,
     };
   }, [chainConfig, currentChainAddress?.tokens]);
@@ -97,7 +98,7 @@ export function SendPage() {
   }, [initialAddress, initialAmount, state.toAddress, state.amount, setToAddress, setAmount]);
 
   // Derive formatted values
-  const balance = state.asset ? formatAssetAmount(state.asset.amount, state.asset.decimals) : '0';
+  const balance = state.asset ? state.asset.amount.toFormatted() : '0';
   const symbol = state.asset?.assetType ?? 'TOKEN';
 
   const handleScan = async () => {
@@ -250,7 +251,7 @@ export function SendPage() {
         amount={state.amount}
         symbol={symbol}
         toAddress={state.toAddress}
-        feeAmount={state.feeAmount}
+        feeAmount={state.feeAmount?.toFormatted() ?? '0'}
         feeSymbol={state.feeSymbol}
         feeLoading={state.feeLoading}
         isConfirming={state.isSubmitting}
diff --git a/src/pages/staking/components/burn-form.tsx b/src/pages/staking/components/burn-form.tsx
index 8d5781ec8..57f889d5a 100644
--- a/src/pages/staking/components/burn-form.tsx
+++ b/src/pages/staking/components/burn-form.tsx
@@ -11,6 +11,7 @@ import { Sheet, SheetContent, SheetHeader, SheetTitle } from '@/components/ui/sh
 import { TokenIcon } from '@/components/token/token-icon';
 import { LoadingSpinner } from '@/components/common/loading-spinner';
 import { stakingService } from '@/services/staking';
+import { Amount } from '@/types/amount';
 import type { ExternalChain, InternalChain, RechargeConfig, BurnRequest } from '@/types/staking';
 import { cn } from '@/lib/utils';
 
@@ -192,10 +193,11 @@ export function BurnForm({ onSuccess, className }: BurnFormProps) {
 
     setIsSubmitting(true);
     try {
+      const cleanAmount = amount.replace(/,/g, '');
       const request: BurnRequest = {
         sourceChain,
         sourceAsset,
-        amount: amount.replace(/,/g, ''),
+        amount: Amount.fromFormatted(cleanAmount, 8, sourceAsset),
         targetChain: targetChain as ExternalChain,
         targetAsset: sourceAsset, // Same asset type for 1:1 burn
       };
diff --git a/src/pages/staking/components/mint-form.tsx b/src/pages/staking/components/mint-form.tsx
index ff59566de..629501193 100644
--- a/src/pages/staking/components/mint-form.tsx
+++ b/src/pages/staking/components/mint-form.tsx
@@ -11,6 +11,7 @@ import { Sheet, SheetContent, SheetHeader, SheetTitle } from '@/components/ui/sh
 import { TokenIcon } from '@/components/token/token-icon';
 import { LoadingSpinner } from '@/components/common/loading-spinner';
 import { stakingService } from '@/services/staking';
+import { Amount } from '@/types/amount';
 import type { ExternalChain, InternalChain, RechargeConfig, MintRequest } from '@/types/staking';
 import { cn } from '@/lib/utils';
 
@@ -167,10 +168,11 @@ export function MintForm({ onSuccess, className }: MintFormProps) {
 
     setIsSubmitting(true);
     try {
+      const cleanAmount = amount.replace(/,/g, '');
       const request: MintRequest = {
         sourceChain,
         sourceAsset,
-        amount: amount.replace(/,/g, ''),
+        amount: Amount.fromFormatted(cleanAmount, 18, sourceAsset),
         targetChain: targetChain as InternalChain,
         targetAsset,
       };
diff --git a/src/pages/staking/components/staking-pool-card.tsx b/src/pages/staking/components/staking-pool-card.tsx
index 3c2bdbdcf..f1c727fd7 100644
--- a/src/pages/staking/components/staking-pool-card.tsx
+++ b/src/pages/staking/components/staking-pool-card.tsx
@@ -6,6 +6,7 @@ import { useTranslation } from 'react-i18next'
 import { TokenIcon } from '@/components/token/token-icon'
 import { Button } from '@/components/ui/button'
 import { cn } from '@/lib/utils'
+import type { Amount } from '@/types/amount'
 import type { StakingOverviewItem } from '@/types/staking'
 
 interface StakingPoolCardProps {
@@ -15,13 +16,12 @@ interface StakingPoolCardProps {
 }
 
 /** Format large numbers with decimals */
-function formatAmount(value: string, decimals = 5): string {
-  const num = parseFloat(value)
-  if (isNaN(num)) return '0.00'
+function formatAmount(value: Amount): string {
+  const num = value.toNumber()
   if (num >= 1e9) return `${(num / 1e9).toFixed(2)}B`
   if (num >= 1e6) return `${(num / 1e6).toFixed(2)}M`
   if (num >= 1e3) return `${(num / 1e3).toFixed(2)}K`
-  return num.toFixed(Math.min(decimals, 8))
+  return num.toFixed(Math.min(5, 8))
 }
 
 /** Staking pool card component */
diff --git a/src/pages/staking/components/staking-record-list.test.tsx b/src/pages/staking/components/staking-record-list.test.tsx
index f1381fa1a..de111d328 100644
--- a/src/pages/staking/components/staking-record-list.test.tsx
+++ b/src/pages/staking/components/staking-record-list.test.tsx
@@ -4,6 +4,7 @@
 
 import { describe, it, expect, vi, beforeEach } from 'vitest'
 import { render, screen, fireEvent, waitFor } from '@testing-library/react'
+import { Amount } from '@/types/amount'
 import { StakingRecordList } from './staking-record-list'
 
 // Mock react-i18next
@@ -23,44 +24,49 @@ vi.mock('react-i18next', () => ({
   }),
 }))
 
+// Create mock data with Amount objects
+const createMockTransactions = () => [
+  {
+    id: 'tx-001',
+    type: 'mint' as const,
+    sourceChain: 'BSC',
+    sourceAsset: 'USDT',
+    sourceAmount: Amount.fromRaw('1000000000000000000000', 18, 'USDT'),
+    targetChain: 'BFMeta',
+    targetAsset: 'USDT',
+    targetAmount: Amount.fromRaw('1000000000000000000000', 18, 'USDT'),
+    status: 'confirmed' as const,
+    txHash: '0x1234',
+    createdAt: Date.now() - 86400000,
+    updatedAt: Date.now() - 86400000 + 300000,
+  },
+  {
+    id: 'tx-002',
+    type: 'burn' as const,
+    sourceChain: 'BFMeta',
+    sourceAsset: 'BFM',
+    sourceAmount: Amount.fromRaw('500000000000000000000', 18, 'BFM'),
+    targetChain: 'ETH',
+    targetAsset: 'BFM',
+    targetAmount: Amount.fromRaw('500000000000000000000', 18, 'BFM'),
+    status: 'pending' as const,
+    createdAt: Date.now() - 3600000,
+    updatedAt: Date.now() - 1800000,
+  },
+]
+
 // Mock staking service
 vi.mock('@/services/staking', () => ({
   stakingService: {
-    getTransactions: vi.fn().mockResolvedValue([
-      {
-        id: 'tx-001',
-        type: 'mint',
-        sourceChain: 'BSC',
-        sourceAsset: 'USDT',
-        sourceAmount: '1000000000000000000000',
-        targetChain: 'BFMeta',
-        targetAsset: 'USDT',
-        targetAmount: '1000000000000000000000',
-        status: 'confirmed',
-        txHash: '0x1234',
-        createdAt: Date.now() - 86400000,
-        updatedAt: Date.now() - 86400000 + 300000,
-      },
-      {
-        id: 'tx-002',
-        type: 'burn',
-        sourceChain: 'BFMeta',
-        sourceAsset: 'BFM',
-        sourceAmount: '500000000000000000000',
-        targetChain: 'ETH',
-        targetAsset: 'BFM',
-        targetAmount: '500000000000000000000',
-        status: 'pending',
-        createdAt: Date.now() - 3600000,
-        updatedAt: Date.now() - 1800000,
-      },
-    ]),
+    getTransactions: vi.fn(),
   },
 }))
 
 describe('StakingRecordList', () => {
-  beforeEach(() => {
+  beforeEach(async () => {
     vi.clearAllMocks()
+    const { stakingService } = await import('@/services/staking')
+    vi.mocked(stakingService.getTransactions).mockResolvedValue(createMockTransactions())
   })
 
   it('renders loading state initially', () => {
diff --git a/src/pages/staking/components/staking-record-list.tsx b/src/pages/staking/components/staking-record-list.tsx
index 479a9597f..b8ef89b36 100644
--- a/src/pages/staking/components/staking-record-list.tsx
+++ b/src/pages/staking/components/staking-record-list.tsx
@@ -16,6 +16,7 @@ import { Button } from '@/components/ui/button';
 import { TokenIcon } from '@/components/token/token-icon';
 import { LoadingSpinner } from '@/components/common/loading-spinner';
 import { stakingService } from '@/services/staking';
+import type { Amount } from '@/types/amount';
 import type { StakingTransaction, StakingTxType, StakingTxStatus } from '@/types/staking';
 import { cn } from '@/lib/utils';
 
@@ -68,8 +69,8 @@ function formatTime(timestamp: number): string {
 }
 
 /** Format amount with decimals */
-function formatAmount(raw: string, decimals = 18): string {
-  const num = parseFloat(raw) / Math.pow(10, decimals);
+function formatAmount(amount: Amount): string {
+  const num = amount.toNumber();
   if (num >= 1000000) return `${(num / 1000000).toFixed(2)}M`;
   if (num >= 1000) return `${(num / 1000).toFixed(2)}K`;
   return num.toFixed(4);
diff --git a/src/pages/staking/index.test.tsx b/src/pages/staking/index.test.tsx
index cbc4a4d45..f9a55a186 100644
--- a/src/pages/staking/index.test.tsx
+++ b/src/pages/staking/index.test.tsx
@@ -4,6 +4,7 @@
 
 import { describe, it, expect, vi, beforeEach } from 'vitest'
 import { render, screen, fireEvent, waitFor } from '@testing-library/react'
+import { Amount } from '@/types/amount'
 import { StakingPage } from './index'
 
 // Mock react-i18next
@@ -49,24 +50,27 @@ vi.mock('@/stackflow', () => ({
   useActivityParams: () => ({}),
 }))
 
+// Create mock data with Amount objects
+const createMockOverview = () => [
+  {
+    chain: 'BFMeta' as const,
+    assetType: 'BFM',
+    stakedAmount: Amount.fromFormatted('10000', 18, 'BFM'),
+    stakedFiat: '$1,234.56',
+    availableChains: ['ETH', 'BSC'] as ('ETH' | 'BSC' | 'TRON')[],
+    totalMinted: Amount.fromRaw('1250000000000000000000000', 18, 'BFM'),
+    totalCirculation: Amount.fromRaw('980000000000000000000000', 18, 'BFM'),
+    totalBurned: Amount.fromRaw('270000000000000000000000', 18, 'BFM'),
+    totalStaked: Amount.fromRaw('1250000000000000000000000', 18, 'BFM'),
+    externalChain: 'BSC' as const,
+    externalAssetType: 'BFM',
+  },
+]
+
 // Mock staking service
 vi.mock('@/services/staking', () => ({
   stakingService: {
-    getOverview: vi.fn().mockResolvedValue([
-      {
-        chain: 'BFMeta',
-        assetType: 'BFM',
-        stakedAmount: '10,000.00',
-        stakedFiat: '$1,234.56',
-        availableChains: ['ETH', 'BSC'],
-        totalMinted: '1250000',
-        totalCirculation: '980000',
-        totalBurned: '270000',
-        totalStaked: '1250000',
-        externalChain: 'BSC',
-        externalAssetType: 'BFM',
-      },
-    ]),
+    getOverview: vi.fn(),
     getRechargeConfig: vi.fn().mockResolvedValue({
       bfmeta: {
         BFM: {
@@ -97,8 +101,10 @@ vi.mock('@/services/staking', () => ({
 }))
 
 describe('StakingPage', () => {
-  beforeEach(() => {
+  beforeEach(async () => {
     vi.clearAllMocks()
+    const { stakingService } = await import('@/services/staking')
+    vi.mocked(stakingService.getOverview).mockResolvedValue(createMockOverview())
   })
 
   it('renders page header with title', () => {
diff --git a/src/pages/token/detail.tsx b/src/pages/token/detail.tsx
index ea9858cec..3da1546fb 100644
--- a/src/pages/token/detail.tsx
+++ b/src/pages/token/detail.tsx
@@ -5,6 +5,7 @@ import { BalanceDisplay } from '@/components/token/balance-display';
 import { TransactionList } from '@/components/transaction/transaction-list';
 import { GradientButton } from '@/components/common/gradient-button';
 import { IconArrowUp as ArrowUp, IconArrowDown as ArrowDown } from '@tabler/icons-react';
+import { Amount } from '@/types/amount';
 
 // 临时模拟数据
 const mockToken = {
@@ -20,7 +21,7 @@ const mockTransactions = [
     id: '1',
     type: 'send' as const,
     status: 'confirmed' as const,
-    amount: '100',
+    amount: Amount.fromFormatted('100', 6, 'USDT'),
     symbol: 'USDT',
     address: '0xabcd...1234',
     timestamp: new Date(Date.now() - 3600000),
@@ -29,7 +30,7 @@ const mockTransactions = [
     id: '2',
     type: 'receive' as const,
     status: 'confirmed' as const,
-    amount: '500',
+    amount: Amount.fromFormatted('500', 6, 'USDT'),
     symbol: 'USDT',
     address: '0x1234...abcd',
     timestamp: new Date(Date.now() - 86400000),
diff --git a/src/queries/use-transaction-history-query.ts b/src/queries/use-transaction-history-query.ts
index b78e98f78..f2645e6a0 100644
--- a/src/queries/use-transaction-history-query.ts
+++ b/src/queries/use-transaction-history-query.ts
@@ -2,6 +2,7 @@ import { useQuery, useQueryClient } from '@tanstack/react-query'
 import { useState } from 'react'
 import type { ChainType } from '@/stores'
 import type { TransactionInfo } from '@/components/transaction/transaction-item'
+import type { Amount } from '@/types/amount'
 import {
   transactionService,
   type TransactionRecord as ServiceTransactionRecord,
@@ -17,7 +18,7 @@ export interface TransactionFilter {
 /** 扩展的交易信息（包含链类型）- 保持与组件兼容 */
 export interface TransactionRecord extends TransactionInfo {
   chain: ChainType
-  fee: string | undefined
+  fee: Amount | undefined
   feeSymbol: string | undefined
   blockNumber: number | undefined
   confirmations: number | undefined
diff --git a/src/services/chain-adapter/__tests__/bioforest-adapter.test.ts b/src/services/chain-adapter/__tests__/bioforest-adapter.test.ts
index 1bd31716c..4fb12bdfc 100644
--- a/src/services/chain-adapter/__tests__/bioforest-adapter.test.ts
+++ b/src/services/chain-adapter/__tests__/bioforest-adapter.test.ts
@@ -1,5 +1,6 @@
 import { describe, expect, it, beforeEach, afterEach } from 'vitest'
 import type { ChainConfig } from '@/services/chain-config'
+import { Amount } from '@/types/amount'
 import { createBioforestKeypair, publicKeyToBioforestAddress, verifySignature, hexToBytes } from '@/lib/crypto'
 import { BioforestAdapter, createBioforestAdapter } from '../bioforest'
 import { getAdapterRegistry, resetAdapterRegistry, setupAdapters } from '../index'
@@ -161,7 +162,7 @@ describe('BioforestTransactionService', () => {
       const fees = await adapter.transaction.estimateFee({
         from: validAddress,
         to: recipientAddress,
-        amount: 1000000n,
+        amount: Amount.fromRaw('1000000', 8, 'BFM'),
       })
 
       expect(fees.slow).toBeDefined()
@@ -176,7 +177,7 @@ describe('BioforestTransactionService', () => {
       const tx = await adapter.transaction.buildTransaction({
         from: validAddress,
         to: recipientAddress,
-        amount: 1000000n,
+        amount: Amount.fromRaw('1000000', 8, 'BFM'),
         memo: 'test transfer',
       })
 
@@ -196,7 +197,7 @@ describe('BioforestTransactionService', () => {
       const tx = await adapter.transaction.buildTransaction({
         from: validAddress,
         to: recipientAddress,
-        amount: 1000000n,
+        amount: Amount.fromRaw('1000000', 8, 'BFM'),
       })
 
       const signedTx = await adapter.transaction.signTransaction(tx, testKeypair.secretKey)
@@ -210,7 +211,7 @@ describe('BioforestTransactionService', () => {
       const tx = await adapter.transaction.buildTransaction({
         from: validAddress,
         to: recipientAddress,
-        amount: 1000000n,
+        amount: Amount.fromRaw('1000000', 8, 'BFM'),
       })
 
       const signedTx = await adapter.transaction.signTransaction(tx, testKeypair.secretKey)
@@ -239,9 +240,9 @@ describe('BioforestTransactionService', () => {
     it('returns mock balance when no RPC configured', async () => {
       const balance = await adapter.asset.getNativeBalance(validAddress)
 
-      expect(balance.raw).toBe(0n)
+      expect(balance.amount.isZero()).toBe(true)
       expect(balance.symbol).toBe('BFM')
-      expect(balance.decimals).toBe(8)
+      expect(balance.amount.decimals).toBe(8)
     })
   })
 
diff --git a/src/services/chain-adapter/bioforest/asset-service.ts b/src/services/chain-adapter/bioforest/asset-service.ts
index f0f192d87..1d70a1bc7 100644
--- a/src/services/chain-adapter/bioforest/asset-service.ts
+++ b/src/services/chain-adapter/bioforest/asset-service.ts
@@ -5,6 +5,7 @@
  */
 
 import type { ChainConfig } from '@/services/chain-config'
+import { Amount } from '@/types/amount'
 import type { IAssetService, Address, Balance, TokenMetadata } from '../types'
 import { ChainServiceError, ChainErrorCodes } from '../types'
 
@@ -57,10 +58,8 @@ export class BioforestAssetService implements IAssetService {
     if (native) return native
 
     return {
-      raw: 0n,
-      formatted: '0',
+      amount: Amount.zero(this.config.decimals, this.config.symbol),
       symbol: this.config.symbol,
-      decimals: this.config.decimals,
     }
   }
 
@@ -73,10 +72,8 @@ export class BioforestAssetService implements IAssetService {
     if (token) return token
 
     return {
-      raw: 0n,
-      formatted: '0',
+      amount: Amount.zero(this.config.decimals, assetType),
       symbol: assetType,
-      decimals: this.config.decimals,
     }
   }
 
@@ -85,10 +82,8 @@ export class BioforestAssetService implements IAssetService {
       // No RPC URL configured, return empty balance
       return [
         {
-          raw: 0n,
-          formatted: '0',
+          amount: Amount.zero(this.config.decimals, this.config.symbol),
           symbol: this.config.symbol,
-          decimals: this.config.decimals,
         },
       ]
     }
@@ -117,10 +112,8 @@ export class BioforestAssetService implements IAssetService {
         // API returned success=false or no result, return empty
         return [
           {
-            raw: 0n,
-            formatted: '0',
+            amount: Amount.zero(this.config.decimals, this.config.symbol),
             symbol: this.config.symbol,
-            decimals: this.config.decimals,
           },
         ]
       }
@@ -137,15 +130,13 @@ export class BioforestAssetService implements IAssetService {
           const asset = magicAssets[assetType]
           if (!asset) continue
 
-          const raw = BigInt(asset.assetNumber)
           // BioForest chains use fixed 8 decimals
           const decimals = this.config.decimals
+          const amount = Amount.fromRaw(asset.assetNumber, decimals, asset.assetType)
 
           balances.push({
-            raw,
-            formatted: this.formatAmount(raw, decimals),
+            amount,
             symbol: asset.assetType,
-            decimals,
           })
         }
       }
@@ -154,10 +145,8 @@ export class BioforestAssetService implements IAssetService {
       if (balances.length === 0) {
         return [
           {
-            raw: 0n,
-            formatted: '0',
+            amount: Amount.zero(this.config.decimals, this.config.symbol),
             symbol: this.config.symbol,
-            decimals: this.config.decimals,
           },
         ]
       }
@@ -183,14 +172,4 @@ export class BioforestAssetService implements IAssetService {
       decimals: this.config.decimals,
     }
   }
-
-  private formatAmount(raw: bigint, decimals: number): string {
-    const divisor = BigInt(10 ** decimals)
-    const integerPart = raw / divisor
-    const fractionalPart = raw % divisor
-
-    // 始终显示完整的小数位（如 0.00000000）
-    const fractionalStr = fractionalPart.toString().padStart(decimals, '0')
-    return `${integerPart}.${fractionalStr}`
-  }
 }
diff --git a/src/services/chain-adapter/bioforest/chain-service.ts b/src/services/chain-adapter/bioforest/chain-service.ts
index 134978bbe..daab1d069 100644
--- a/src/services/chain-adapter/bioforest/chain-service.ts
+++ b/src/services/chain-adapter/bioforest/chain-service.ts
@@ -3,6 +3,7 @@
  */
 
 import type { ChainConfig } from '@/services/chain-config'
+import { Amount } from '@/types/amount'
 import type { IChainService, ChainInfo, GasPrice, HealthStatus } from '../types'
 import { ChainServiceError, ChainErrorCodes } from '../types'
 import type { BioforestBlockInfo, BioforestFeeInfo } from './types'
@@ -63,13 +64,15 @@ export class BioforestChainService implements IChainService {
   }
 
   async getGasPrice(): Promise<GasPrice> {
+    const { decimals, symbol } = this.config
+
     if (!this.baseUrl) {
       // Return default fees
-      const defaultFee = BigInt(10000000) // 0.1 in 8 decimals
+      const defaultFee = Amount.fromRaw('10000000', decimals, symbol) // 0.1 in 8 decimals
       return {
         slow: defaultFee,
         standard: defaultFee,
-        fast: defaultFee * 2n,
+        fast: defaultFee.mul(2),
         lastUpdated: Date.now(),
       }
     }
@@ -88,23 +91,23 @@ export class BioforestChainService implements IChainService {
       }
 
       const data = (await response.json()) as { data: BioforestFeeInfo }
-      const minFee = BigInt(data.data.minFee)
-      const avgFee = BigInt(data.data.avgFee)
+      const minFee = Amount.fromRaw(data.data.minFee, decimals, symbol)
+      const avgFee = Amount.fromRaw(data.data.avgFee, decimals, symbol)
 
       return {
         slow: minFee,
-        standard: avgFee > minFee ? avgFee : minFee,
-        fast: avgFee * 2n > minFee ? avgFee * 2n : minFee * 2n,
+        standard: avgFee.gt(minFee) ? avgFee : minFee,
+        fast: avgFee.mul(2).gt(minFee) ? avgFee.mul(2) : minFee.mul(2),
         lastUpdated: Date.now(),
       }
     } catch (error) {
       if (error instanceof ChainServiceError) throw error
       // Return default on error
-      const defaultFee = BigInt(10000000)
+      const defaultFee = Amount.fromRaw('10000000', decimals, symbol)
       return {
         slow: defaultFee,
         standard: defaultFee,
-        fast: defaultFee * 2n,
+        fast: defaultFee.mul(2),
         lastUpdated: Date.now(),
       }
     }
diff --git a/src/services/chain-adapter/bioforest/transaction-service.ts b/src/services/chain-adapter/bioforest/transaction-service.ts
index 2e4596f5b..615c5821c 100644
--- a/src/services/chain-adapter/bioforest/transaction-service.ts
+++ b/src/services/chain-adapter/bioforest/transaction-service.ts
@@ -6,6 +6,7 @@
  */
 
 import type { ChainConfig } from '@/services/chain-config'
+import { Amount } from '@/types/amount'
 import type {
   ITransactionService,
   TransferParams,
@@ -36,9 +37,8 @@ export class BioforestTransactionService implements ITransactionService {
   async estimateFee(_params: TransferParams): Promise<FeeEstimate> {
     const gasPrice = await this.chainService.getGasPrice()
 
-    const createFee = (amount: bigint, time: number): Fee => ({
+    const createFee = (amount: Amount, time: number): Fee => ({
       amount,
-      formatted: this.formatAmount(amount),
       estimatedTime: time,
     })
 
@@ -64,9 +64,9 @@ export class BioforestTransactionService implements ITransactionService {
         type: 'transfer',
         from: params.from,
         to: params.to,
-        amount: params.amount.toString(),
+        amount: params.amount.toRawString(),
         assetType: this.config.symbol,
-        fee: feeEstimate.standard.amount.toString(),
+        fee: feeEstimate.standard.amount.toRawString(),
         memo: params.memo,
         timestamp: Date.now(),
       },
@@ -235,12 +235,14 @@ export class BioforestTransactionService implements ITransactionService {
       const tx = result.data.transaction
       if (!tx) return null
 
+      const { decimals, symbol } = this.config
+
       return {
         hash: tx.signature,
         from: tx.senderId,
         to: tx.recipientId,
-        amount: BigInt(tx.amount),
-        fee: BigInt(tx.fee),
+        amount: Amount.fromRaw(tx.amount, decimals, symbol),
+        fee: Amount.fromRaw(tx.fee, decimals, symbol),
         status: {
           status: tx.height ? 'confirmed' : 'pending',
           confirmations: tx.height ? 1 : 0,
@@ -292,12 +294,14 @@ export class BioforestTransactionService implements ITransactionService {
         }
       }
 
+      const { decimals, symbol } = this.config
+
       return result.data.transactions.map((tx) => ({
         hash: tx.signature,
         from: tx.senderId,
         to: tx.recipientId,
-        amount: BigInt(tx.amount),
-        fee: BigInt(tx.fee),
+        amount: Amount.fromRaw(tx.amount, decimals, symbol),
+        fee: Amount.fromRaw(tx.fee, decimals, symbol),
         status: {
           status: tx.height ? 'confirmed' : 'pending',
           confirmations: tx.height ? 1 : 0,
@@ -311,18 +315,4 @@ export class BioforestTransactionService implements ITransactionService {
       return []
     }
   }
-
-  private formatAmount(raw: bigint): string {
-    const decimals = this.config.decimals
-    const divisor = BigInt(10 ** decimals)
-    const integerPart = raw / divisor
-    const fractionalPart = raw % divisor
-
-    if (fractionalPart === 0n) {
-      return integerPart.toString()
-    }
-
-    const fractionalStr = fractionalPart.toString().padStart(decimals, '0').replace(/0+$/, '')
-    return `${integerPart}.${fractionalStr}`
-  }
 }
diff --git a/src/services/chain-adapter/types.ts b/src/services/chain-adapter/types.ts
index 00af14dd8..4eb1906cd 100644
--- a/src/services/chain-adapter/types.ts
+++ b/src/services/chain-adapter/types.ts
@@ -3,6 +3,7 @@
  */
 
 import type { ChainConfig, ChainConfigType } from '@/services/chain-config'
+import { Amount } from '@/types/amount'
 
 // ==================== 基础类型 ====================
 
@@ -13,10 +14,8 @@ export type Signature = string
 // ==================== 余额 ====================
 
 export interface Balance {
-  raw: bigint
-  formatted: string
+  amount: Amount
   symbol: string
-  decimals: number
 }
 
 // ==================== 代币 ====================
@@ -38,8 +37,7 @@ export interface FeeEstimate {
 }
 
 export interface Fee {
-  amount: bigint
-  formatted: string
+  amount: Amount
   estimatedTime: number // seconds
 }
 
@@ -48,7 +46,7 @@ export interface Fee {
 export interface TransferParams {
   from: Address
   to: Address
-  amount: bigint
+  amount: Amount
   tokenAddress?: Address
   memo?: string
 }
@@ -77,8 +75,8 @@ export interface Transaction {
   hash: TransactionHash
   from: Address
   to: Address
-  amount: bigint
-  fee: bigint
+  amount: Amount
+  fee: Amount
   status: TransactionStatus
   timestamp: number
   blockNumber?: bigint | undefined
@@ -101,10 +99,10 @@ export interface ChainInfo {
 }
 
 export interface GasPrice {
-  slow: bigint
-  standard: bigint
-  fast: bigint
-  baseFee?: bigint
+  slow: Amount
+  standard: Amount
+  fast: Amount
+  baseFee?: Amount | undefined
   lastUpdated: number
 }
 
diff --git a/src/services/staking/mock.ts b/src/services/staking/mock.ts
index 484859919..abad8bbda 100644
--- a/src/services/staking/mock.ts
+++ b/src/services/staking/mock.ts
@@ -2,6 +2,7 @@
  * Staking 服务 - Mock 实现
  */
 
+import { Amount } from '@/types/amount'
 import { stakingServiceMeta, type IStakingMockController } from './types'
 import type {
   RechargeConfig,
@@ -55,42 +56,42 @@ const initialOverview: StakingOverviewItem[] = [
   {
     chain: 'BFMeta',
     assetType: 'BFM',
-    stakedAmount: '10,000.00',
+    stakedAmount: Amount.fromFormatted('10000', 18, 'BFM'),
     stakedFiat: '$1,234.56',
     availableChains: ['ETH', 'BSC'],
     logoUrl: '/tokens/bfm.svg',
-    totalMinted: '1250000',
-    totalCirculation: '980000',
-    totalBurned: '270000',
-    totalStaked: '1250000',
+    totalMinted: Amount.fromRaw('1250000000000000000000000', 18, 'BFM'),
+    totalCirculation: Amount.fromRaw('980000000000000000000000', 18, 'BFM'),
+    totalBurned: Amount.fromRaw('270000000000000000000000', 18, 'BFM'),
+    totalStaked: Amount.fromRaw('1250000000000000000000000', 18, 'BFM'),
     externalChain: 'BSC',
     externalAssetType: 'BFM',
   },
   {
     chain: 'BFMeta',
     assetType: 'USDT',
-    stakedAmount: '5,000.00',
+    stakedAmount: Amount.fromFormatted('5000', 6, 'USDT'),
     stakedFiat: '$5,000.00',
     availableChains: ['ETH', 'BSC', 'TRON'],
     logoUrl: '/tokens/usdt.svg',
-    totalMinted: '8500000',
-    totalCirculation: '7200000',
-    totalBurned: '1300000',
-    totalStaked: '8500000',
+    totalMinted: Amount.fromRaw('8500000000000', 6, 'USDT'),
+    totalCirculation: Amount.fromRaw('7200000000000', 6, 'USDT'),
+    totalBurned: Amount.fromRaw('1300000000000', 6, 'USDT'),
+    totalStaked: Amount.fromRaw('8500000000000', 6, 'USDT'),
     externalChain: 'ETH',
     externalAssetType: 'USDT',
   },
   {
     chain: 'BFChain',
     assetType: 'BFC',
-    stakedAmount: '2,500.00',
+    stakedAmount: Amount.fromFormatted('2500', 18, 'BFC'),
     stakedFiat: '$625.00',
     availableChains: ['BSC'],
     logoUrl: '/tokens/bfc.svg',
-    totalMinted: '450000',
-    totalCirculation: '380000',
-    totalBurned: '70000',
-    totalStaked: '450000',
+    totalMinted: Amount.fromRaw('450000000000000000000000', 18, 'BFC'),
+    totalCirculation: Amount.fromRaw('380000000000000000000000', 18, 'BFC'),
+    totalBurned: Amount.fromRaw('70000000000000000000000', 18, 'BFC'),
+    totalStaked: Amount.fromRaw('450000000000000000000000', 18, 'BFC'),
     externalChain: 'BSC',
     externalAssetType: 'BFC',
   },
@@ -102,10 +103,10 @@ const initialTransactions: StakingTransaction[] = [
     type: 'mint',
     sourceChain: 'BSC',
     sourceAsset: 'USDT',
-    sourceAmount: '1000000000000000000000',
+    sourceAmount: Amount.fromRaw('1000000000000000000000', 18, 'USDT'),
     targetChain: 'BFMeta',
     targetAsset: 'USDT',
-    targetAmount: '1000000000000000000000',
+    targetAmount: Amount.fromRaw('1000000000000000000000', 18, 'USDT'),
     status: 'confirmed',
     txHash: '0x1234567890abcdef1234567890abcdef12345678',
     createdAt: Date.now() - 86400000,
@@ -116,10 +117,10 @@ const initialTransactions: StakingTransaction[] = [
     type: 'burn',
     sourceChain: 'BFMeta',
     sourceAsset: 'BFM',
-    sourceAmount: '500000000000000000000',
+    sourceAmount: Amount.fromRaw('500000000000000000000', 18, 'BFM'),
     targetChain: 'ETH',
     targetAsset: 'BFM',
-    targetAmount: '500000000000000000000',
+    targetAmount: Amount.fromRaw('500000000000000000000', 18, 'BFM'),
     status: 'confirming',
     createdAt: Date.now() - 3600000,
     updatedAt: Date.now() - 1800000,
diff --git a/src/services/staking/types.ts b/src/services/staking/types.ts
index aff477e60..f09ccccd1 100644
--- a/src/services/staking/types.ts
+++ b/src/services/staking/types.ts
@@ -4,6 +4,7 @@
 
 import { z } from 'zod'
 import { defineServiceMeta } from '@/lib/service-meta'
+import { Amount } from '@/types/amount'
 import type {
   RechargeConfig,
   StakingTransaction,
@@ -15,6 +16,9 @@ import type {
 
 // ==================== Zod Schemas ====================
 
+// Custom Amount schema for Zod validation
+const AmountSchema = z.custom<Amount>((val) => val instanceof Amount)
+
 const RechargeConfigSchema = z.record(z.string(), z.record(z.string(), z.object({
   assetType: z.string(),
   logo: z.string().optional(),
@@ -30,14 +34,14 @@ const LogoUrlMapSchema = z.record(z.string(), z.record(z.string(), z.string()))
 const StakingOverviewItemSchema = z.object({
   chain: z.enum(['BFMeta', 'BFChain', 'CCChain', 'PMChain']),
   assetType: z.string(),
-  stakedAmount: z.string(),
+  stakedAmount: AmountSchema,
   stakedFiat: z.string(),
   availableChains: z.array(z.enum(['ETH', 'BSC', 'TRON'])),
   logoUrl: z.string().optional(),
-  totalMinted: z.string(),
-  totalCirculation: z.string(),
-  totalBurned: z.string(),
-  totalStaked: z.string(),
+  totalMinted: AmountSchema,
+  totalCirculation: AmountSchema,
+  totalBurned: AmountSchema,
+  totalStaked: AmountSchema,
   externalChain: z.enum(['ETH', 'BSC', 'TRON']),
   externalAssetType: z.string(),
 })
@@ -47,10 +51,10 @@ const StakingTransactionSchema = z.object({
   type: z.enum(['mint', 'burn']),
   sourceChain: z.string(),
   sourceAsset: z.string(),
-  sourceAmount: z.string(),
+  sourceAmount: AmountSchema,
   targetChain: z.string(),
   targetAsset: z.string(),
-  targetAmount: z.string(),
+  targetAmount: AmountSchema,
   status: z.enum(['pending', 'confirming', 'confirmed', 'failed']),
   txHash: z.string().optional(),
   createdAt: z.number(),
@@ -61,7 +65,7 @@ const StakingTransactionSchema = z.object({
 const MintRequestSchema = z.object({
   sourceChain: z.enum(['ETH', 'BSC', 'TRON']),
   sourceAsset: z.string(),
-  amount: z.string(),
+  amount: AmountSchema,
   targetChain: z.enum(['BFMeta', 'BFChain', 'CCChain', 'PMChain']),
   targetAsset: z.string(),
 })
@@ -69,7 +73,7 @@ const MintRequestSchema = z.object({
 const BurnRequestSchema = z.object({
   sourceChain: z.enum(['BFMeta', 'BFChain', 'CCChain', 'PMChain']),
   sourceAsset: z.string(),
-  amount: z.string(),
+  amount: AmountSchema,
   targetChain: z.enum(['ETH', 'BSC', 'TRON']),
   targetAsset: z.string(),
 })
diff --git a/src/services/transaction/mock.ts b/src/services/transaction/mock.ts
index c0ba0a784..60fb66d3f 100644
--- a/src/services/transaction/mock.ts
+++ b/src/services/transaction/mock.ts
@@ -2,6 +2,7 @@
  * Transaction 服务 - Mock 实现
  */
 
+import { Amount } from '@/types/amount'
 import { transactionServiceMeta, type ITransactionMockController, type TransactionRecord, type TransactionFilter, type TransactionType, type TransactionStatus } from './types'
 import type { ChainType } from '@/stores'
 
@@ -21,6 +22,12 @@ function randomHash(): string {
   return hash
 }
 
+// Decimals for different tokens
+const TOKEN_DECIMALS: Record<string, number> = {
+  ETH: 18, USDT: 6, USDC: 6, TRX: 6, BTC: 8, BNB: 18, BUSD: 18, BFM: 8,
+  BFC: 8, CC: 8, PM: 8, BTG: 8, BIW: 8, ETHM: 18, MAL: 8, TOKEN: 18,
+}
+
 function generateInitialTransactions(count: number = 30): TransactionRecord[] {
   const types: TransactionType[] = ['send', 'receive', 'swap', 'stake', 'unstake']
   const statuses: TransactionStatus[] = ['confirmed', 'confirmed', 'confirmed', 'pending', 'failed']
@@ -49,22 +56,30 @@ function generateInitialTransactions(count: number = 30): TransactionRecord[] {
     const type = types[Math.floor(Math.random() * types.length)]!
     const status = statuses[Math.floor(Math.random() * statuses.length)]!
     const symbol = chainSymbols[Math.floor(Math.random() * chainSymbols.length)]!
+    const decimals = TOKEN_DECIMALS[symbol] ?? 18
+    const feeSymbol = chain === 'ethereum' ? 'ETH' : chain === 'tron' ? 'TRX' : symbol
+    const feeDecimals = TOKEN_DECIMALS[feeSymbol] ?? 18
 
     const daysAgo = Math.floor(Math.random() * 90)
     const timestamp = new Date(now - daysAgo * 24 * 60 * 60 * 1000)
 
+    const amountStr = (Math.random() * 100).toFixed(type === 'swap' ? 2 : 4)
+    const feeStr = (Math.random() * 0.01).toFixed(6)
+
     transactions.push({
       id: `tx-${i}-${Date.now()}`,
       type,
       status,
-      amount: (Math.random() * 100).toFixed(type === 'swap' ? 2 : 4),
+      amount: Amount.fromFormatted(amountStr, decimals, symbol),
       symbol,
+      decimals,
       address: randomAddress(),
       timestamp,
       hash: randomHash(),
       chain,
-      fee: (Math.random() * 0.01).toFixed(6),
-      feeSymbol: chain === 'ethereum' ? 'ETH' : chain === 'tron' ? 'TRX' : symbol,
+      fee: Amount.fromFormatted(feeStr, feeDecimals, feeSymbol),
+      feeSymbol,
+      feeDecimals,
       blockNumber: status === 'confirmed' ? Math.floor(Math.random() * 1000000) + 18000000 : undefined,
       confirmations: status === 'confirmed' ? Math.floor(Math.random() * 100) + 1 : 0,
     })
diff --git a/src/services/transaction/types.ts b/src/services/transaction/types.ts
index dd7e466d8..1c7afd907 100644
--- a/src/services/transaction/types.ts
+++ b/src/services/transaction/types.ts
@@ -4,8 +4,12 @@
 
 import { z } from 'zod'
 import { defineServiceMeta } from '@/lib/service-meta'
+import { Amount } from '@/types/amount'
 import type { ChainType } from '@/stores'
 
+// Custom Amount schema for Zod validation
+const AmountSchema = z.custom<Amount>((val) => val instanceof Amount)
+
 /** 交易类型 */
 export type TransactionType = 'send' | 'receive' | 'swap' | 'stake' | 'unstake'
 
@@ -17,14 +21,16 @@ export interface TransactionRecord {
   id: string
   type: TransactionType
   status: TransactionStatus
-  amount: string
+  amount: Amount
   symbol: string
+  decimals: number
   address: string
   timestamp: Date
   hash?: string | undefined
   chain: ChainType
-  fee?: string | undefined
+  fee?: Amount | undefined
   feeSymbol?: string | undefined
+  feeDecimals?: number | undefined
   blockNumber?: number | undefined
   confirmations?: number | undefined
 }
@@ -37,20 +43,22 @@ export interface TransactionFilter {
   status: TransactionStatus | 'all' | undefined
 }
 
-// ==================== Zod Schemas ====================
+// ==================== Zod Schemas (for API validation) ====================
 
 const TransactionRecordSchema = z.object({
   id: z.string(),
   type: z.enum(['send', 'receive', 'swap', 'stake', 'unstake']),
   status: z.enum(['pending', 'confirmed', 'failed']),
-  amount: z.string(),
+  amount: AmountSchema,
   symbol: z.string(),
+  decimals: z.number(),
   address: z.string(),
   timestamp: z.date(),
   hash: z.string().optional(),
   chain: z.string(),
-  fee: z.string().optional(),
+  fee: AmountSchema.optional(),
   feeSymbol: z.string().optional(),
+  feeDecimals: z.number().optional(),
   blockNumber: z.number().optional(),
   confirmations: z.number().optional(),
 })
diff --git a/src/services/transaction/web.ts b/src/services/transaction/web.ts
index d954cfca2..aa52d9020 100644
--- a/src/services/transaction/web.ts
+++ b/src/services/transaction/web.ts
@@ -6,7 +6,6 @@ import { transactionServiceMeta, type TransactionFilter, type TransactionRecord,
 import { walletStorageService } from '@/services/wallet-storage'
 import { initialize as initializeChainConfigs, getEnabledChains, getChainById, type ChainConfig } from '@/services/chain-config'
 import { createBioforestAdapter, type Transaction as ChainTransaction } from '@/services/chain-adapter'
-import { formatAssetAmount } from '@/types/asset'
 
 const recordCache = new Map<string, TransactionRecord>()
 type TransactionFilterInput = Partial<TransactionFilter> | undefined
@@ -65,21 +64,21 @@ function mapType(tx: ChainTransaction, address: string): TransactionType {
 
 function mapChainTransaction(tx: ChainTransaction, config: ChainConfig, address: string): TransactionRecord {
   const type = mapType(tx, address)
-  const amount = formatAssetAmount(tx.amount.toString(), config.decimals)
-  const fee = formatAssetAmount(tx.fee.toString(), config.decimals)
 
   return {
     id: `${config.id}:${tx.hash}`,
     type,
     status: mapStatus(tx.status),
-    amount,
+    amount: tx.amount,
     symbol: config.symbol,
+    decimals: config.decimals,
     address: type === 'send' ? tx.to : tx.from,
     timestamp: new Date(tx.timestamp),
     hash: tx.hash,
     chain: config.id,
-    fee,
+    fee: tx.fee,
     feeSymbol: config.symbol,
+    feeDecimals: config.decimals,
     blockNumber: tx.blockNumber ? Number(tx.blockNumber) : undefined,
     confirmations: tx.status.confirmations,
   }
diff --git a/src/stores/wallet.ts b/src/stores/wallet.ts
index f06cb0b0d..6d832409d 100644
--- a/src/stores/wallet.ts
+++ b/src/stores/wallet.ts
@@ -455,10 +455,10 @@ export const walletActions = {
         id: `${chain}:${b.symbol}`,
         symbol: b.symbol,
         name: b.symbol,
-        balance: b.formatted,
+        balance: b.amount.toFormatted(),
         fiatValue: 0, // TODO: 对接汇率服务
         change24h: 0,
-        decimals: b.decimals,
+        decimals: b.amount.decimals,
         chain,
       }))
 
diff --git a/src/types/asset.test.ts b/src/types/asset.test.ts
index c148b03f2..02a141037 100644
--- a/src/types/asset.test.ts
+++ b/src/types/asset.test.ts
@@ -1,88 +1,90 @@
 import { describe, it, expect } from 'vitest'
+import { Amount } from './amount'
 import {
-  formatAssetAmount,
   formatFiatValue,
   formatPriceChange,
   convertFiat,
 } from './asset'
 
-describe('formatAssetAmount', () => {
+describe('Amount.toFormatted (replaces formatAssetAmount)', () => {
   it('formats zero amount', () => {
-    expect(formatAssetAmount('0', 18)).toBe('0')
-    expect(formatAssetAmount('', 18)).toBe('0')
+    expect(Amount.zero(18).toFormatted()).toBe('0')
+    expect(Amount.fromRaw('0', 18).toFormatted()).toBe('0')
   })
 
   it('formats integer amounts', () => {
     // 1 ETH = 1000000000000000000 wei
-    expect(formatAssetAmount('1000000000000000000', 18)).toBe('1')
+    expect(Amount.fromRaw('1000000000000000000', 18).toFormatted()).toBe('1')
     // 100 USDT = 100000000 (6 decimals)
-    expect(formatAssetAmount('100000000', 6)).toBe('100')
+    expect(Amount.fromRaw('100000000', 6).toFormatted()).toBe('100')
   })
 
   it('formats decimal amounts', () => {
     // 1.5 ETH
-    expect(formatAssetAmount('1500000000000000000', 18)).toBe('1.5')
+    expect(Amount.fromRaw('1500000000000000000', 18).toFormatted()).toBe('1.5')
     // 0.5 BTC
-    expect(formatAssetAmount('50000000', 8)).toBe('0.5')
+    expect(Amount.fromRaw('50000000', 8).toFormatted()).toBe('0.5')
     // 10.25 USDT
-    expect(formatAssetAmount('10250000', 6)).toBe('10.25')
+    expect(Amount.fromRaw('10250000', 6).toFormatted()).toBe('10.25')
   })
 
   it('trims trailing zeros', () => {
     // 1.10 should be 1.1
-    expect(formatAssetAmount('1100000000000000000', 18)).toBe('1.1')
+    expect(Amount.fromRaw('1100000000000000000', 18).toFormatted()).toBe('1.1')
     // 2.500 should be 2.5
-    expect(formatAssetAmount('2500000', 6)).toBe('2.5')
+    expect(Amount.fromRaw('2500000', 6).toFormatted()).toBe('2.5')
   })
 
   it('handles small amounts', () => {
     // 0.001 ETH
-    expect(formatAssetAmount('1000000000000000', 18)).toBe('0.001')
+    expect(Amount.fromRaw('1000000000000000', 18).toFormatted()).toBe('0.001')
     // 0.000001 USDT
-    expect(formatAssetAmount('1', 6)).toBe('0.000001')
+    expect(Amount.fromRaw('1', 6).toFormatted()).toBe('0.000001')
   })
 
   it('handles large amounts', () => {
     // 1000000 ETH
-    expect(formatAssetAmount('1000000000000000000000000', 18)).toBe('1000000')
+    expect(Amount.fromRaw('1000000000000000000000000', 18).toFormatted()).toBe('1000000')
     // 999999.999999 USDT
-    expect(formatAssetAmount('999999999999', 6)).toBe('999999.999999')
+    expect(Amount.fromRaw('999999999999', 6).toFormatted()).toBe('999999.999999')
   })
 })
 
 describe('formatFiatValue', () => {
   it('formats USD values', () => {
-    // 1 ETH at $2500 = $2500.00
-    expect(formatFiatValue('1000000000000000000', 18, 2500, 'USD')).toBe('$2,500.00')
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    expect(formatFiatValue(amount, 18, 2500, 'USD')).toBe('$2,500.00')
   })
 
   it('formats small values', () => {
-    // 0.5 ETH at $2500 = $1250.00
-    expect(formatFiatValue('500000000000000000', 18, 2500, 'USD')).toBe('$1,250.00')
+    const amount = Amount.fromRaw('500000000000000000', 18)
+    expect(formatFiatValue(amount, 18, 2500, 'USD')).toBe('$1,250.00')
   })
 
   it('returns $0.00 for zero amount', () => {
-    expect(formatFiatValue('0', 18, 2500, 'USD')).toBe('$0.00')
-    expect(formatFiatValue('', 18, 2500, 'USD')).toBe('$0.00')
+    expect(formatFiatValue(Amount.zero(18), 18, 2500, 'USD')).toBe('$0.00')
   })
 
   it('returns $0.00 when price is zero', () => {
-    expect(formatFiatValue('1000000000000000000', 18, 0, 'USD')).toBe('$0.00')
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    expect(formatFiatValue(amount, 18, 0, 'USD')).toBe('$0.00')
   })
 
   it('formats CNY values', () => {
-    // 1 ETH at $2500 in CNY
-    const result = formatFiatValue('1000000000000000000', 18, 2500, 'CNY')
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    const result = formatFiatValue(amount, 18, 2500, 'CNY')
     expect(result).toContain('2,500.00')
   })
 
   it('formats EUR values', () => {
-    const result = formatFiatValue('1000000000000000000', 18, 2500, 'EUR')
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    const result = formatFiatValue(amount, 18, 2500, 'EUR')
     expect(result).toContain('2.500,00') // German locale uses comma for decimals
   })
 
   it('defaults to USD for unknown currency', () => {
-    expect(formatFiatValue('1000000000000000000', 18, 2500, 'UNKNOWN')).toBe('$2,500.00')
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    expect(formatFiatValue(amount, 18, 2500, 'UNKNOWN')).toBe('$2,500.00')
   })
 })
 
@@ -129,9 +131,8 @@ describe('convertFiat', () => {
 
 describe('formatFiatValue with exchange rate', () => {
   it('applies exchange rate when currency is not USD', () => {
-    // 1 ETH at $2500, convert to CNY at rate 7.2
-    // Expected: 2500 * 7.2 = 18000 CNY
-    const result = formatFiatValue('1000000000000000000', 18, 2500, {
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    const result = formatFiatValue(amount, 18, 2500, {
       currency: 'CNY',
       exchangeRate: 7.2,
     })
@@ -139,8 +140,8 @@ describe('formatFiatValue with exchange rate', () => {
   })
 
   it('ignores exchange rate when currency is USD', () => {
-    // Even with exchange rate provided, USD should not be converted
-    const result = formatFiatValue('1000000000000000000', 18, 2500, {
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    const result = formatFiatValue(amount, 18, 2500, {
       currency: 'USD',
       exchangeRate: 7.2,
     })
@@ -148,35 +149,34 @@ describe('formatFiatValue with exchange rate', () => {
   })
 
   it('works without exchange rate (legacy behavior)', () => {
-    // Without exchange rate, just formats the USD value with target currency symbol
-    const result = formatFiatValue('1000000000000000000', 18, 2500, {
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    const result = formatFiatValue(amount, 18, 2500, {
       currency: 'CNY',
     })
     expect(result).toContain('2,500.00')
   })
 
   it('supports legacy string parameter', () => {
-    // Legacy call with string currency parameter
-    const result = formatFiatValue('1000000000000000000', 18, 2500, 'USD')
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    const result = formatFiatValue(amount, 18, 2500, 'USD')
     expect(result).toBe('$2,500.00')
   })
 
   it('uses custom locale when provided', () => {
-    const result = formatFiatValue('1000000000000000000', 18, 2500, {
+    const amount = Amount.fromRaw('1000000000000000000', 18)
+    const result = formatFiatValue(amount, 18, 2500, {
       currency: 'EUR',
       exchangeRate: 0.92,
       locale: 'en-US',
     })
-    // Using en-US locale for EUR should give different format
     expect(result).toContain('2,300.00')
   })
 
   it('formats zero with target currency symbol', () => {
-    const result = formatFiatValue('0', 18, 2500, {
+    const result = formatFiatValue(Amount.zero(18), 18, 2500, {
       currency: 'CNY',
       exchangeRate: 7.2,
     })
-    // Should show CNY formatted zero, not USD
     expect(result).toContain('0.00')
   })
 })
diff --git a/src/types/asset.ts b/src/types/asset.ts
index 39bbf9561..5d95482d0 100644
--- a/src/types/asset.ts
+++ b/src/types/asset.ts
@@ -3,12 +3,14 @@
  * Based on mpay $AddressAssetsTypeV2 pattern
  */
 
+import { Amount } from './amount'
+
 /** Single asset/token information */
 export interface AssetInfo {
   /** Token identifier (ETH, USDT, BFM, etc.) */
   assetType: string
-  /** Balance as string for decimal precision */
-  amount: string
+  /** Balance as Amount object */
+  amount: Amount
   /** Decimal places for formatting */
   decimals: number
   /** Token icon URL (optional, fallback to letter) */
@@ -43,26 +45,6 @@ export interface AssetState {
   error: string | null
 }
 
-/** Format raw amount with decimals */
-export function formatAssetAmount(amount: string, decimals: number): string {
-  if (!amount || amount === '0') return '0'
-
-  const value = BigInt(amount)
-  const divisor = BigInt(10 ** decimals)
-  const integerPart = value / divisor
-  const fractionalPart = value % divisor
-
-  if (fractionalPart === 0n) {
-    return integerPart.toString()
-  }
-
-  const fractionalStr = fractionalPart.toString().padStart(decimals, '0')
-  // Trim trailing zeros
-  const trimmed = fractionalStr.replace(/0+$/, '')
-
-  return `${integerPart}.${trimmed}`
-}
-
 /** Currency configuration for fiat formatting */
 export interface CurrencyConfig {
   code: string
@@ -100,59 +82,43 @@ export interface FormatFiatOptions {
 
 /**
  * Calculate and format fiat value from asset amount and price
- *
- * Overload 1: Legacy signature (backward compatible)
- * @param amount Raw amount string (in smallest unit)
- * @param decimals Token decimal places
+ * @param amount Amount object or raw string
+ * @param decimals Token decimal places (only used if amount is string)
  * @param priceUsd Price per token in USD
- * @param currency Target currency code (default: USD)
+ * @param options Formatting options
  * @returns Formatted fiat value string (e.g., "$1,234.56")
  */
 export function formatFiatValue(
-  amount: string,
+  amount: Amount | string,
   decimals: number,
   priceUsd: number,
-  currency?: string
-): string
-/**
- * Overload 2: Extended signature with options object
- * @param amount Raw amount string (in smallest unit)
- * @param decimals Token decimal places
- * @param priceUsd Price per token in USD
- * @param options Formatting options including currency and exchange rate
- * @returns Formatted fiat value string
- */
-export function formatFiatValue(
-  amount: string,
-  decimals: number,
-  priceUsd: number,
-  options?: FormatFiatOptions
-): string
-export function formatFiatValue(
-  amount: string,
-  decimals: number,
-  priceUsd: number,
-  currencyOrOptions?: string | FormatFiatOptions
+  options?: FormatFiatOptions | string
 ): string {
-  // Parse options - support both legacy string and new options object
-  const options: FormatFiatOptions =
-    typeof currencyOrOptions === 'string'
-      ? { currency: currencyOrOptions }
-      : currencyOrOptions ?? {}
+  const opts: FormatFiatOptions =
+    typeof options === 'string' ? { currency: options } : options ?? {}
 
-  const { currency = 'USD', exchangeRate, locale } = options
+  const { currency = 'USD', exchangeRate, locale } = opts
 
-  // Get currency config with fallback to USD
   const config: CurrencyConfig = currencyConfigs[currency] ?? {
     code: 'USD',
     locale: 'en-US',
   }
 
-  // Use provided locale or default to currency's locale
   const formatLocale = locale ?? config.locale
 
-  // Handle zero/empty values - format with target currency
-  if (!amount || amount === '0' || !priceUsd) {
+  // Convert Amount or string to number
+  let value: number
+  if (amount instanceof Amount) {
+    value = amount.toNumber()
+  } else {
+    if (!amount || amount === '0') {
+      value = 0
+    } else {
+      value = Number(amount) / 10 ** decimals
+    }
+  }
+
+  if (value === 0 || !priceUsd) {
     return new Intl.NumberFormat(formatLocale, {
       style: 'currency',
       currency: config.code,
@@ -161,16 +127,12 @@ export function formatFiatValue(
     }).format(0)
   }
 
-  // Convert to number for calculation
-  const value = Number(amount) / 10 ** decimals
   let fiatValue = value * priceUsd
 
-  // Apply exchange rate if provided and currency is not USD
   if (exchangeRate !== undefined && currency !== 'USD') {
     fiatValue = convertFiat(fiatValue, exchangeRate)
   }
 
-  // Format with Intl.NumberFormat
   return new Intl.NumberFormat(formatLocale, {
     style: 'currency',
     currency: config.code,
@@ -189,3 +151,28 @@ export function formatPriceChange(change: number | undefined): string {
   const sign = change >= 0 ? '+' : ''
   return `${sign}${change.toFixed(2)}%`
 }
+
+/**
+ * Create AssetInfo from raw data (e.g., from API)
+ */
+export function createAssetInfo(data: {
+  assetType: string
+  amount: string // raw or formatted string
+  decimals: number
+  logoUrl?: string
+  contractAddress?: string
+  name?: string
+  priceUsd?: number
+  priceChange24h?: number
+}): AssetInfo {
+  return {
+    assetType: data.assetType,
+    amount: Amount.parse(data.amount, data.decimals, data.assetType),
+    decimals: data.decimals,
+    logoUrl: data.logoUrl,
+    contractAddress: data.contractAddress,
+    name: data.name,
+    priceUsd: data.priceUsd,
+    priceChange24h: data.priceChange24h,
+  }
+}
diff --git a/src/types/staking.test.ts b/src/types/staking.test.ts
index 0aba7ce75..c58afb82b 100644
--- a/src/types/staking.test.ts
+++ b/src/types/staking.test.ts
@@ -3,6 +3,7 @@
  */
 
 import { describe, it, expect } from 'vitest'
+import { Amount } from './amount'
 import {
   ExternalChainSchema,
   InternalChainSchema,
@@ -11,9 +12,6 @@ import {
   RechargeConfigItemSchema,
   StakingTxTypeSchema,
   StakingTxStatusSchema,
-  StakingTransactionSchema,
-  MintRequestSchema,
-  BurnRequestSchema,
   type ExternalChain,
   type InternalChain,
   type StakingTransaction,
@@ -133,66 +131,57 @@ describe('Staking Types', () => {
     })
   })
 
-  describe('StakingTransactionSchema', () => {
-    it('validates complete transaction', () => {
+  describe('StakingTransaction interface', () => {
+    it('validates complete transaction with Amount', () => {
       const tx: StakingTransaction = {
         id: 'tx-001',
         type: 'mint',
         sourceChain: 'BSC',
         sourceAsset: 'USDT',
-        sourceAmount: '1000000000000000000',
+        sourceAmount: Amount.fromRaw('1000000000000000000', 18, 'USDT'),
         targetChain: 'BFMeta',
         targetAsset: 'USDT',
-        targetAmount: '1000000000000000000',
+        targetAmount: Amount.fromRaw('1000000000000000000', 18, 'USDT'),
         status: 'confirmed',
         txHash: '0x1234567890abcdef',
         createdAt: Date.now(),
         updatedAt: Date.now(),
       }
-      expect(StakingTransactionSchema.parse(tx)).toEqual(tx)
+
+      expect(tx.id).toBe('tx-001')
+      expect(tx.type).toBe('mint')
+      expect(tx.sourceAmount.toRawString()).toBe('1000000000000000000')
     })
 
     it('allows optional txHash and errorMessage', () => {
-      const tx = {
+      const tx: StakingTransaction = {
         id: 'tx-002',
         type: 'burn',
         sourceChain: 'BFMeta',
         sourceAsset: 'BFM',
-        sourceAmount: '500000000',
+        sourceAmount: Amount.fromFormatted('500', 8, 'BFM'),
         targetChain: 'ETH',
         targetAsset: 'BFM',
-        targetAmount: '500000000',
+        targetAmount: Amount.fromFormatted('500', 18, 'BFM'),
         status: 'pending',
         createdAt: Date.now(),
         updatedAt: Date.now(),
       }
-      expect(StakingTransactionSchema.parse(tx)).toEqual(tx)
+
+      expect(tx.txHash).toBeUndefined()
+      expect(tx.errorMessage).toBeUndefined()
     })
   })
 
-  describe('MintRequestSchema', () => {
-    it('validates mint request', () => {
-      const request = {
-        sourceChain: 'ETH' as ExternalChain,
-        sourceAsset: 'USDT',
-        amount: '1000000',
-        targetChain: 'BFMeta' as InternalChain,
-        targetAsset: 'USDT',
-      }
-      expect(MintRequestSchema.parse(request)).toEqual(request)
+  describe('Type inference', () => {
+    it('ExternalChain type is correct', () => {
+      const chain: ExternalChain = 'ETH'
+      expect(['ETH', 'BSC', 'TRON']).toContain(chain)
     })
-  })
 
-  describe('BurnRequestSchema', () => {
-    it('validates burn request', () => {
-      const request = {
-        sourceChain: 'BFMeta' as InternalChain,
-        sourceAsset: 'BFM',
-        amount: '1000000000',
-        targetChain: 'BSC' as ExternalChain,
-        targetAsset: 'BFM',
-      }
-      expect(BurnRequestSchema.parse(request)).toEqual(request)
+    it('InternalChain type is correct', () => {
+      const chain: InternalChain = 'BFMeta'
+      expect(['BFMeta', 'BFChain', 'CCChain', 'PMChain']).toContain(chain)
     })
   })
 })
diff --git a/src/types/staking.ts b/src/types/staking.ts
index 1c2745e2a..74c4d5f66 100644
--- a/src/types/staking.ts
+++ b/src/types/staking.ts
@@ -4,6 +4,7 @@
  */
 
 import { z } from 'zod'
+import { Amount } from './amount'
 
 /** Supported external chains for staking */
 export const ExternalChainSchema = z.enum(['ETH', 'BSC', 'TRON'])
@@ -64,65 +65,62 @@ export const StakingTxStatusSchema = z.enum(['pending', 'confirming', 'confirmed
 export type StakingTxStatus = z.infer<typeof StakingTxStatusSchema>
 
 /** Staking transaction record */
-export const StakingTransactionSchema = z.object({
+export interface StakingTransaction {
   /** Unique transaction ID */
-  id: z.string(),
+  id: string
   /** Transaction type (mint/burn) */
-  type: StakingTxTypeSchema,
+  type: StakingTxType
   /** Source chain */
-  sourceChain: z.string(),
+  sourceChain: string
   /** Source asset type */
-  sourceAsset: z.string(),
-  /** Source amount (raw, in smallest unit) */
-  sourceAmount: z.string(),
+  sourceAsset: string
+  /** Source amount */
+  sourceAmount: Amount
   /** Target chain */
-  targetChain: z.string(),
+  targetChain: string
   /** Target asset type */
-  targetAsset: z.string(),
-  /** Target amount (raw, in smallest unit) */
-  targetAmount: z.string(),
+  targetAsset: string
+  /** Target amount */
+  targetAmount: Amount
   /** Transaction status */
-  status: StakingTxStatusSchema,
+  status: StakingTxStatus
   /** Transaction hash (on-chain) */
-  txHash: z.string().optional(),
+  txHash?: string | undefined
   /** Creation timestamp */
-  createdAt: z.number(),
+  createdAt: number
   /** Last update timestamp */
-  updatedAt: z.number(),
+  updatedAt: number
   /** Error message if failed */
-  errorMessage: z.string().optional(),
-})
-export type StakingTransaction = z.infer<typeof StakingTransactionSchema>
+  errorMessage?: string | undefined
+}
 
 /** Mint (stake) request */
-export const MintRequestSchema = z.object({
+export interface MintRequest {
   /** Source external chain */
-  sourceChain: ExternalChainSchema,
+  sourceChain: ExternalChain
   /** Source asset type */
-  sourceAsset: z.string(),
-  /** Amount to mint (raw, in smallest unit) */
-  amount: z.string(),
+  sourceAsset: string
+  /** Amount to mint */
+  amount: Amount
   /** Target internal chain */
-  targetChain: InternalChainSchema,
+  targetChain: InternalChain
   /** Target asset type */
-  targetAsset: z.string(),
-})
-export type MintRequest = z.infer<typeof MintRequestSchema>
+  targetAsset: string
+}
 
 /** Burn (unstake) request */
-export const BurnRequestSchema = z.object({
+export interface BurnRequest {
   /** Source internal chain */
-  sourceChain: InternalChainSchema,
+  sourceChain: InternalChain
   /** Source asset type */
-  sourceAsset: z.string(),
-  /** Amount to burn (raw, in smallest unit) */
-  amount: z.string(),
+  sourceAsset: string
+  /** Amount to burn */
+  amount: Amount
   /** Target external chain */
-  targetChain: ExternalChainSchema,
+  targetChain: ExternalChain
   /** Target asset type */
-  targetAsset: z.string(),
-})
-export type BurnRequest = z.infer<typeof BurnRequestSchema>
+  targetAsset: string
+}
 
 /** Staking overview item */
 export interface StakingOverviewItem {
@@ -130,22 +128,22 @@ export interface StakingOverviewItem {
   chain: InternalChain
   /** Asset type */
   assetType: string
-  /** Staked amount (formatted) */
-  stakedAmount: string
-  /** Staked amount in fiat */
+  /** Staked amount */
+  stakedAmount: Amount
+  /** Staked amount in fiat (formatted string for display) */
   stakedFiat: string
   /** Available external chains for unstaking */
   availableChains: ExternalChain[]
   /** Logo URL */
   logoUrl?: string | undefined
   /** Total amount minted (pool stat) */
-  totalMinted: string
+  totalMinted: Amount
   /** Total amount in circulation (pool stat) */
-  totalCirculation: string
+  totalCirculation: Amount
   /** Total amount burned/redeemed (pool stat) */
-  totalBurned: string
+  totalBurned: Amount
   /** Total amount staked on external chain (pool stat) */
-  totalStaked: string
+  totalStaked: Amount
   /** External chain name */
   externalChain: ExternalChain
   /** External asset type */