diff --git a/src/views/Activities/Lottery/Lottery.vue b/src/views/Activities/Lottery/Lottery.vue
index 772b32a..e1f70a3 100644
--- a/src/views/Activities/Lottery/Lottery.vue
+++ b/src/views/Activities/Lottery/Lottery.vue
@@ -289,7 +289,7 @@
                   v-for="coin in coinOptions"
                   :key="coin.id"
                   @click="selectCoin(coin)"
-                  :class="['coin-item', { selected: selectedCoin.id === coin.id }]"
+                  :class="['coin-item', { selected: selectedCoin?.id === coin.id }]"
                 >
                   <img src="/src/assets/icon/dollar.png" alt="" style="width: 40%" />
                   <div style="font-weight: 500; color: #131111">${{ coin.price }}</div>
@@ -310,7 +310,7 @@
                     font-weight: 590;
                   "
                   @click="transfer"
-                  :disabled="!selectedCoin || !selectedPayee.value.id"
+                  :disabled="!selectedCoin || !selectedPayee.value?.id"
                 >
                   Transfer
                 </div>
@@ -349,7 +349,7 @@
                   v-for="coin in coinOptions"
                   :key="coin.id"
                   @click="selectCoin(coin)"
-                  :class="['coin-item', { selected: selectedCoin.id == coin.id }]"
+                  :class="['coin-item', { selected: selectedCoin?.id == coin.id }]"
                 >
                   <img src="/src/assets/icon/coin.png" alt="" style="width: 40%" />
                   <div style="font-size: 0.7em">{{ coin.amount }} coins x1</div>
@@ -370,7 +370,8 @@
                     background: linear-gradient(135deg, #bb92ff 2.82%, #8b45ff 99.15%);
                     font-weight: 590;
                   "
-                  :disabled="!selectedCoin.id || !selectedPayee.value?.id"
+                  :disabled="!selectedCoin || !selectedPayee.value?.id"
+                  @click="exchangeCoinBt"
                 >
                   Exchange
                 </div>
@@ -988,7 +989,7 @@ const coinOptions = ref([
 //选择金币
 const selectCoin = (coin) => {
   // 单选逻辑：如果已经选中相同的金币，则取消选择；否则选中新的金币
-  if (selectedCoin.value.id === coin.id) {
+  if (selectedCoin.value?.id == coin.id) {
     selectedCoin.value = null
   } else {
     selectedCoin.value = coin
@@ -1011,37 +1012,55 @@ const transfer = async () => {
   const transferData = {
     amount: selectedCoin.value.price,
     acceptUserId: selectedPayee.value?.id,
-    acceptMethod: 'BANK_TRANSFER',
-    // password: password
   }
 
   try {
     // 调用转账接口
-    const response = await userBankTransfer(transferData)
+    const response = await transferActivityDollar(transferData)
     if (response.status) {
       showSuccess(
-        `Successfully transferred $${selectedCoinData.price} to ${selectedPayee.value?.name}`
+        `Successfully transferred $${selectedCoin.value.price} to ${selectedPayee.value?.name}`
       )
     } else {
-      showError(`Failed to transfer $${selectedCoinData.price}`)
+      showError(`Failed to transfer $${selectedCoin.value.price}`)
     }
 
     // 重置选择
     selectedCoin.value = null
 
-    // 刷新银行余额
-    await fetchBankBalance()
+    getDrawableAmount() //刷新可提现金额
   } catch (error) {
-    // 错误处理
-    console.error('Transfer failed:', error)
+    showError(error.errorMsg)
+  }
+}
 
-    if (error.errorCode === 5000) {
-      showError('Insufficient balance')
-    } else if (error.errorCode === 5010 || error.errorCode === 5009) {
-      showError('Payment password error')
+//兑换代币
+const exchangeCoinBt = async () => {
+  if (!selectedCoin.value) {
+    showError('Please select an amount first')
+    return
+  }
+
+  // 构造请求参数
+  const transferData = {
+    amount: selectedCoin.value.price,
+  }
+
+  try {
+    // 调用转账接口
+    const response = await exchangeCoin(transferData)
+    if (response.status) {
+      showSuccess(`Successfully exchange $${selectedCoin.value.amount} coins`)
     } else {
-      showError('Transfer failed, please try again later')
+      showError(`Failed to exchange $${selectedCoin.value.amount} coins`)
     }
+
+    // 重置选择
+    selectedCoin.value = null
+
+    getDrawableAmount() //刷新可提现金额
+  } catch (error) {
+    showError(error.errorMsg)
   }
 }