> ## Documentation Index
> Fetch the complete documentation index at: https://www.helius.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Solana 优先费用估算：账户密钥方法

> 使用 Helius 优先费用 API，通过账户密钥估算 Solana 优先费用。为交易前分析和批量操作提供快速费用估算。

<Info>
  **高级方法**：使用账户密钥获取优先费用估算，适用于交易前分析、批量操作和账户模式研究等特殊用例。
</Info>

## 概述

当您需要快速费用估算或在构建完整交易之前估算费用时，账户密钥方法提供了一种比交易序列化更简单的替代方案。

<CardGroup cols={2}>
  <Card title="高级用例" icon="key">
    * 交易前分析
    * 批量账户操作
    * 市场研究和模式
    * 专用架构
  </Card>

  <Card title="权衡" icon="scale-unbalanced-flip">
    * 准确性低于序列化交易
    * 无指令特定分析
    * 最适合账户级模式
  </Card>
</CardGroup>

<Warning>
  **建议**：对于大多数应用程序，请使用[序列化交易方法](/docs/zh/priority-fee/estimating-fees-using-serialized-transaction)。此账户密钥方法适用于需要账户级分析或交易前规划的特殊用例。
</Warning>

## 何时使用账户密钥

<Tabs>
  <Tab title="理想用例">
    <CardGroup cols={2}>
      <Card title="交易前规划" icon="calendar">
        在构建完整交易之前获取费用估算
      </Card>

      <Card title="简化集成" icon="puzzle-piece">
        当您的架构使交易序列化变得困难时
      </Card>

      <Card title="快速市场分析" icon="chart-line">
        分析特定账户的费用模式而无需构建交易
      </Card>

      <Card title="多账户分析" icon="users">
        独立了解多个账户的费用模式
      </Card>
    </CardGroup>
  </Tab>

  <Tab title="特殊场景">
    **研究与分析**：研究不同账户和程序的费用模式时

    **批量操作**：同时分析多个账户的费用模式时

    **预规划**：在构建复杂交易工作流之前进行成本估算

    **自定义架构**：当系统限制阻止交易序列化时
  </Tab>
</Tabs>

## 快速开始

<Steps>
  <Step title="识别账户">
    确定哪些账户将参与您的交易
  </Step>

  <Step title="调用API">
    使用账户密钥和所需的优先级别发出请求
  </Step>

  <Step title="应用费用">
    使用估算来设置交易中的优先费用
  </Step>
</Steps>

### 基本示例

<CodeGroup>
  ```javascript JavaScript theme={"system"}
  import { ComputeBudgetProgram } from "@solana/web3.js";

  // 1. Identify accounts involved in your transaction
  const accountKeys = [
    "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA", // Token program
    "YOUR_WALLET_ADDRESS",                          // Your wallet
    "RECIPIENT_ADDRESS"                             // Recipient
  ];

  // 2. Get priority fee estimate
  const priorityFee = await getPriorityFeeEstimate(connection, accountKeys, "Medium");

  // 3. Add to your transaction
  const priorityFeeIx = ComputeBudgetProgram.setComputeUnitPrice({
    microLamports: priorityFee
  });
  transaction.add(priorityFeeIx);
  ```

  ```python Python theme={"system"}
  import requests

  # Get priority fee estimate
  def get_priority_fee_estimate(account_keys, priority_level="Medium"):
      response = requests.post(
          "https://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY",
          json={
              "jsonrpc": "2.0",
              "id": "1",
              "method": "getPriorityFeeEstimate",
              "params": [{
                  "accountKeys": account_keys,
                  "options": {
                      "priorityLevel": priority_level,
                      "recommended": True
                  }
              }]
          }
      )
      return response.json()["result"]["priorityFeeEstimate"]

  # Usage
  accounts = ["ACCOUNT_1", "ACCOUNT_2", "ACCOUNT_3"]
  fee = get_priority_fee_estimate(accounts, "High")
  print(f"Priority fee: {fee} micro-lamports")
  ```
</CodeGroup>

## 实施指南

### 核心功能

这是一个用于获取优先费用估算的可重用函数：

```javascript theme={"system"}
async function getPriorityFeeEstimate(connection, accountKeys, priorityLevel = "Medium") {
  const response = await fetch(connection.rpcEndpoint, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      jsonrpc: "2.0",
      id: "1",
      method: "getPriorityFeeEstimate",
      params: [{
        accountKeys: accountKeys,
        options: { 
          priorityLevel: priorityLevel,
          recommended: true 
        }
      }]
    })
  });
  
  const result = await response.json();
  
  if (result.error) {
    throw new Error(`Fee estimation failed: ${JSON.stringify(result.error)}`);
  }
  
  return result.result.priorityFeeEstimate;
}
```

### 具有多个优先级别的完整示例

<Accordion title="展开以查看完整实现">
  ```javascript theme={"system"}
  const { 
    Connection, 
    PublicKey, 
    Transaction, 
    ComputeBudgetProgram 
  } = require("@solana/web3.js");

  // Initialize connection
  const connection = new Connection("https://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY");

  async function analyzeAccountPriorityFees() {
    // Define accounts involved in your transaction
    const accountKeys = [
      "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA", // Token program
      "YOUR_WALLET_ADDRESS",                          // Your wallet
      "TOKEN_ACCOUNT_ADDRESS",                        // Token account
      "RECIPIENT_ADDRESS"                             // Recipient
    ];
    
    try {
      // Get estimates for different priority levels
      const [lowFee, mediumFee, highFee, veryHighFee] = await Promise.all([
        getPriorityFeeEstimate(connection, accountKeys, "Low"),
        getPriorityFeeEstimate(connection, accountKeys, "Medium"), 
        getPriorityFeeEstimate(connection, accountKeys, "High"),
        getPriorityFeeEstimate(connection, accountKeys, "VeryHigh")
      ]);
      
      console.log("Priority Fee Estimates:");
      console.log(`Low:      ${lowFee} micro-lamports`);
      console.log(`Medium:   ${mediumFee} micro-lamports`);
      console.log(`High:     ${highFee} micro-lamports`);
      console.log(`VeryHigh: ${veryHighFee} micro-lamports`);
      
      // Get all levels at once for comparison
      const allLevels = await getAllPriorityLevels(connection, accountKeys);
      console.log("\nAll priority levels:", allLevels);
      
      return {
        low: lowFee,
        medium: mediumFee,
        high: highFee,
        veryHigh: veryHighFee,
        allLevels
      };
    } catch (error) {
      console.error("Error getting priority fees:", error);
      throw error;
    }
  }

  // Helper function to get all priority levels
  async function getAllPriorityLevels(connection, accountKeys) {
    const response = await fetch(connection.rpcEndpoint, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        jsonrpc: "2.0",
        id: "1",
        method: "getPriorityFeeEstimate",
        params: [{
          accountKeys: accountKeys,
          options: { 
            includeAllPriorityFeeLevels: true
          }
        }]
      })
    });
    
    const result = await response.json();
    
    if (result.error) {
      throw new Error(`Fee estimation failed: ${JSON.stringify(result.error)}`);
    }
    
    return result.result.priorityFeeLevels;
  }

  // Run the analysis
  analyzeAccountPriorityFees();
  ```
</Accordion>

## 账户类型与策略

<Tabs>
  <Tab title="程序账户">
    高交易量的程序账户通常由于竞争而显示更高的优先费用。

    ```javascript theme={"system"}
    // Popular program accounts
    const programAccounts = [
      "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA", // Token program
      "ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL", // Associated token program
      "M2mx93ekt1fmXSVkTrUL9xVFHkmME8HTUi5Cyc5aF7K"  // Metaplex program
    ];

    const programFees = await getPriorityFeeEstimate(connection, programAccounts, "Medium");
    console.log(`Program account fees: ${programFees} micro-lamports`);
    ```

    <Note>
      **预期行为**：由于高交易量和竞争导致更高的费用。
    </Note>
  </Tab>

  <Tab title="用户钱包">
    活跃的用户钱包可能根据其活动显示不同的费用模式。

    ```javascript theme={"system"}
    // Active user wallets
    const userWallets = [
      "USER_WALLET_1", // Active trader
      "USER_WALLET_2"  // Regular user
    ];

    const walletFees = await getPriorityFeeEstimate(connection, userWallets, "Medium");
    console.log(`User wallet fees: ${walletFees} micro-lamports`);
    ```

    <Tip>
      **专业提示**：包括发送者和接收者钱包以获得更准确的估算。
    </Tip>
  </Tab>

  <Tab title="代币账户">
    特定代币账户可能根据代币的受欢迎程度显示不同的模式。

    ```javascript theme={"system"}
    // Popular token accounts
    const tokenAccounts = [
      "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v", // USDC mint
      "So11111111111111111111111111111111111111112",  // SOL mint
      "YOUR_TOKEN_ACCOUNT"                            // Your specific token account
    ];

    const tokenFees = await getPriorityFeeEstimate(connection, tokenAccounts, "Medium");
    ```
  </Tab>
</Tabs>

## 高级配置选项

<AccordionGroup>
  <Accordion title="空插槽评估">
    `evaluateEmptySlotAsZero` 选项对于基于帐户的估算特别有用：

    ```javascript theme={"system"}
    async function compareEmptySlotHandling(accountKeys) {
      const withEmptyAsZero = await fetch(connection.rpcEndpoint, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          jsonrpc: "2.0",
          id: "1",
          method: "getPriorityFeeEstimate",
          params: [{
            accountKeys: accountKeys,
            options: { 
              priorityLevel: "Medium",
              evaluateEmptySlotAsZero: true // Default: true
            }
          }]
        })
      });

      const withoutEmptyAsZero = await fetch(connection.rpcEndpoint, {
        method: "POST", 
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          jsonrpc: "2.0",
          id: "1",
          method: "getPriorityFeeEstimate", 
          params: [{
            accountKeys: accountKeys,
            options: {
              priorityLevel: "Medium",
              evaluateEmptySlotAsZero: false
            }
          }]
        })
      });
      
      const result1 = await withEmptyAsZero.json();
      const result2 = await withoutEmptyAsZero.json();
      
      console.log(`With empty as zero: ${result1.result.priorityFeeEstimate}`);
      console.log(`Without empty as zero: ${result2.result.priorityFeeEstimate}`);
    }
    ```

    <Note>
      当`true`（默认）时，没有交易的插槽被视为零费用而不是被排除。这为交易稀疏的帐户提供了更平衡的估算。
    </Note>
  </Accordion>

  <Accordion title="包含详细信息">
    请求有关每个账户费用模式的详细信息：

    ```javascript theme={"system"}
    async function getDetailedFeeEstimate(connection, accountKeys) {
      const response = await fetch(connection.rpcEndpoint, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          jsonrpc: "2.0",
          id: "1",
          method: "getPriorityFeeEstimate",
          params: [{
            accountKeys: accountKeys,
            options: { 
              includeDetails: true,
              priorityLevel: "Medium"
            }
          }]
        })
      });
      
      const result = await response.json();
      console.log("Detailed fee analysis:", result.result);
      return result.result;
    }
    ```

    这将返回有关如何为每个账户计算费用的附加信息。
  </Accordion>

  <Accordion title="自定义回溯期">
    调整用于费用估算的槽位数量：

    ```javascript theme={"system"}
    async function getCustomLookbackEstimate(accountKeys, lookbackSlots = 50) {
      const response = await fetch(connection.rpcEndpoint, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          jsonrpc: "2.0",
          id: "1",
          method: "getPriorityFeeEstimate",
          params: [{
            accountKeys: accountKeys,
            options: { 
              priorityLevel: "Medium",
              lookbackSlots: lookbackSlots  // 1-150, default is 150
            }
          }]
        })
      });
      
      const result = await response.json();
      return result.result.priorityFeeEstimate;
    }

    // Compare different lookback periods
    const shortTerm = await getCustomLookbackEstimate(accountKeys, 50);   // Recent trends
    const longTerm = await getCustomLookbackEstimate(accountKeys, 150);   // Historical average

    console.log(`Short-term estimate: ${shortTerm} micro-lamports`);
    console.log(`Long-term estimate: ${longTerm} micro-lamports`);
    ```

    <Tip>
      **较小的回溯期**：更近期，可能波动的数据

      **较大的回溯期**：更稳定的历史背景
    </Tip>
  </Accordion>
</AccordionGroup>

## 账户选择的最佳实践

<CardGroup cols={1}>
  <Card title="包含可写账户" icon="pen-to-square">
    **优先级**：关注将被修改的账户

    ```javascript theme={"system"}
    const writableAccounts = [
      "YOUR_WALLET",        // Paying fees
      "TOKEN_ACCOUNT",      // Being modified  
      "RECIPIENT_ACCOUNT"   // Receiving tokens
    ];
    ```
  </Card>

  <Card title="添加关键程序" icon="gear">
    **背景**：包含相关的程序账户

    ```javascript theme={"system"}
    const programAccounts = [
      "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA", // Token program
      "CUSTOM_PROGRAM_ID"                           // Your program
    ];
    ```
  </Card>
</CardGroup>

## 错误处理与回退

<CodeGroup>
  ```javascript Robust Implementation theme={"system"}
  class AccountBasedFeeEstimator {
    constructor(connection) {
      this.connection = connection;
      this.fallbackFee = 10000; // 10k micro-lamports fallback
    }

    async getEstimate(accountKeys, priorityLevel = "Medium") {
      try {
        // Primary attempt
        const estimate = await this.getPrimaryEstimate(accountKeys, priorityLevel);
        return estimate;
      } catch (error) {
        console.warn("Primary estimate failed:", error.message);
        
        // Fallback to different configuration
        try {
          return await this.getFallbackEstimate(accountKeys, priorityLevel);
        } catch (fallbackError) {
          console.warn("Fallback estimate failed:", fallbackError.message);
          return this.fallbackFee;
        }
      }
    }

    async getPrimaryEstimate(accountKeys, priorityLevel) {
      const response = await fetch(this.connection.rpcEndpoint, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          jsonrpc: "2.0",
          id: "1",
          method: "getPriorityFeeEstimate",
          params: [{
            accountKeys: accountKeys,
            options: { 
              priorityLevel: priorityLevel,
              recommended: true 
            }
          }]
        })
      });

      const result = await response.json();
      if (result.error) {
        throw new Error(result.error.message);
      }
      
      return result.result.priorityFeeEstimate;
    }

    async getFallbackEstimate(accountKeys, priorityLevel) {
      // Try with fewer accounts or different settings
      const coreAccounts = accountKeys.slice(0, 3); // Take first 3 accounts
      
      const response = await fetch(this.connection.rpcEndpoint, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          jsonrpc: "2.0",
          id: "1",
          method: "getPriorityFeeEstimate",
          params: [{
            accountKeys: coreAccounts,
            options: { 
              priorityLevel: "Medium", // Use medium as fallback
              evaluateEmptySlotAsZero: true
            }
          }]
        })
      });

      const result = await response.json();
      if (result.error) {
        throw new Error(result.error.message);
      }
      
      return result.result.priorityFeeEstimate;
    }
  }

  // Usage
  const estimator = new AccountBasedFeeEstimator(connection);
  const fee = await estimator.getEstimate(accountKeys, "High");
  ```

  ```javascript Simple Error Handling theme={"system"}
  async function safeGetPriorityFee(accountKeys, priorityLevel = "Medium") {
    try {
      return await getPriorityFeeEstimate(connection, accountKeys, priorityLevel);
    } catch (error) {
      console.warn(`Priority fee estimation failed: ${error.message}`);
      
      // Return reasonable fallback based on priority level
      const fallbacks = {
        "Low": 1000,
        "Medium": 5000,
        "High": 15000,
        "VeryHigh": 50000
      };
      
      return fallbacks[priorityLevel] || 5000;
    }
  }
  ```
</CodeGroup>

## 限制与注意事项

<Warning>
  **基于账户的方法限制：**

  1. **对只读账户的准确性较低** - 算法侧重于可写账户
  2. **无指令特定分析** - 无法考虑特定操作
  3. **账户活动依赖性** - 对于不活跃账户准确性较低
  4. **不考虑交易大小** - 不考虑交易复杂性
</Warning>

<Note>
  **何时升级到序列化交易：**

  * 需要最高准确性的生产应用
  * 包含多个指令的复杂交易
  * 当指令特定的费用模式很重要时
  * 性能关键的应用
</Note>

## 相关资源

<CardGroup cols={2}>
  <Card title="Serialized Transactions" icon="file-code" href="/docs/zh/priority-fee/estimating-fees-using-serialized-transaction">
    使用完整交易序列化的更准确方法
  </Card>

  <Card title="API Reference" icon="book" href="/docs/zh/api-reference/priority-fee/getpriorityfeeestimate">
    完整的API文档和参数
  </Card>
</CardGroup>