getMaxShredInsertSlot

​

参数

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响应

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代码示例

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基本请求

curl https://fra.rpc.orbitflare.com?api_key=YOUR-API-KEY -X POST -H "Content-Type: application/json" -d '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getMaxShredInsertSlot"
}'

​

使用 web3.js

import { Connection } from '@solana/web3.js';

const connection = new Connection('https://fra.rpc.orbitflare.com?api_key=YOUR-API-KEY');

// Get max shred insert slot
const maxShredInsertSlot = await connection.getMaxShredInsertSlot();
console.log('Max shred insert slot:', maxShredInsertSlot);

// Check if a slot can be inserted
async function canInsertSlot(slot: number) {
  const maxShredInsertSlot = await connection.getMaxShredInsertSlot();
  return slot <= maxShredInsertSlot;
}

// Get insert range
async function getInsertRange() {
  const maxShredInsertSlot = await connection.getMaxShredInsertSlot();
  const firstAvailableBlock = await connection.getFirstAvailableBlock();
  
  return {
    startSlot: firstAvailableBlock,
    endSlot: maxShredInsertSlot,
    totalSlots: maxShredInsertSlot - firstAvailableBlock + 1
  };
}

​

注意事项

1. 返回可插入到 shred 数据库中的最高 slot
2. 用于确定可进行 shred 插入的 slot 范围
3. 响应是即时的，因为它从当前状态读取
4. 超出此值的 slot 无法被插入
5. 随着节点处理新的 slot，此值可能会改变

​

最佳实践

1. 使用此方法确定 shred 插入的可用性
2. 在适当时缓存结果以减少 RPC 负载
3. 考虑 slot 处理的影响
4. 监控最大 shred 插入 slot 的变化
5. 结合其他 slot 相关方法使用

​

常见错误

​

用例

1. Shred 插入规划
   复制

   interface InsertPlan {
     startSlot: number;
     endSlot: number;
     totalSlots: number;
     availableSlots: number[];
     unavailableSlots: number[];
   }
   
   async function planShredInsertion(
     targetSlots: number[]
   ): Promise<InsertPlan> {
     const maxShredInsertSlot = await connection.getMaxShredInsertSlot();
     const firstAvailableBlock = await connection.getFirstAvailableBlock();
     
     const availableSlots = targetSlots.filter(
       slot => slot >= firstAvailableBlock && slot <= maxShredInsertSlot
     );
     
     const unavailableSlots = targetSlots.filter(
       slot => slot < firstAvailableBlock || slot > maxShredInsertSlot
     );
     
     return {
       startSlot: firstAvailableBlock,
       endSlot: maxShredInsertSlot,
       totalSlots: maxShredInsertSlot - firstAvailableBlock + 1,
       availableSlots,
       unavailableSlots
     };
   }
   
2. Slot 处理监控
   复制

   interface ProcessingAlert {
     type: 'lag' | 'gap' | 'unavailable';
     message: string;
     slot: number;
     maxShredInsertSlot: number;
   }
   
   class ProcessingMonitor {
     private previousMaxSlot: number | null = null;
     
     async monitorProcessing(
       targetSlots: number[]
     ): Promise<ProcessingAlert[]> {
       const maxShredInsertSlot = await connection.getMaxShredInsertSlot();
       const alerts: ProcessingAlert[] = [];
       
       // Check for processing lag
       if (this.previousMaxSlot !== null) {
         const expectedProgress = this.previousMaxSlot + 1;
         if (maxShredInsertSlot < expectedProgress) {
           alerts.push({
             type: 'lag',
             message: `Processing lag detected: expected ${expectedProgress}, got ${maxShredInsertSlot}`,
             slot: maxShredInsertSlot,
             maxShredInsertSlot
           });
         }
       }
       
       // Check target slots availability
       for (const slot of targetSlots) {
         if (slot > maxShredInsertSlot) {
           alerts.push({
             type: 'unavailable',
             message: `Slot ${slot} is beyond max shred insert slot`,
             slot,
             maxShredInsertSlot
           });
         }
       }
       
       this.previousMaxSlot = maxShredInsertSlot;
       return alerts;
     }
   }
   
3. Shred 数据库管理
   复制

   interface ShredDatabaseMetrics {
     availableRange: {
       start: number;
       end: number;
       total: number;
     };
     processingRate: number;
     lag: number;
     metadata: {
       timestamp: number;
       maxShredInsertSlot: number;
     };
   }
   
   class ShredDatabaseManager {
     private previousMetrics: {
       timestamp: number;
       maxSlot: number;
     } | null = null;
     
     async getMetrics(): Promise<ShredDatabaseMetrics> {
       const maxShredInsertSlot = await connection.getMaxShredInsertSlot();
       const firstAvailableBlock = await connection.getFirstAvailableBlock();
       const currentTime = Date.now();
       
       let processingRate = 0;
       let lag = 0;
       
       if (this.previousMetrics !== null) {
         const timeDiff = (currentTime - this.previousMetrics.timestamp) / 1000; // seconds
         const slotDiff = maxShredInsertSlot - this.previousMetrics.maxSlot;
         processingRate = slotDiff / timeDiff;
         
         const currentSlot = await connection.getSlot();
         lag = currentSlot - maxShredInsertSlot;
       }
       
       this.previousMetrics = {
         timestamp: currentTime,
         maxSlot: maxShredInsertSlot
       };
       
       return {
         availableRange: {
           start: firstAvailableBlock,
           end: maxShredInsertSlot,
           total: maxShredInsertSlot - firstAvailableBlock + 1
         },
         processingRate,
         lag,
         metadata: {
           timestamp: currentTime,
           maxShredInsertSlot
         }
       };
     }
   }