isBlockhashValid

​

参数

​

响应

​

代码示例

​

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": "isBlockhashValid",
  "params": [
    "J7rBdM6AecPDEZp8aPq5tPmsPzPhQG4HD6YtAcQBDfJj"
  ]
}'

​

使用 web3.js

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

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

// Check if blockhash is valid
const isValid = await connection.isBlockhashValid('J7rBdM6AecPDEZp8aPq5tPmsPzPhQG4HD6YtAcQBDfJj');
console.log('Is blockhash valid:', isValid);

// Check blockhash validity with analysis
async function checkBlockhashValidityWithAnalysis(
  blockhash: string,
  config: { 
    commitment?: string;
    minContextSlot?: number;
  }
) {
  const isValid = await connection.isBlockhashValid(blockhash, config);
  
  return {
    blockhash,
    validity: {
      isValid,
      checkedAt: Date.now()
    },
    config: {
      commitment: config.commitment,
      minContextSlot: config.minContextSlot
    }
  };
}

​

注意事项

1. 返回 blockhash 是否仍然有效
2. blockhash 在经过一定数量的 slot 后会过期
3. 响应是即时的，因为它从当前状态读取
4. 无效的 blockhash 不能在交易中使用
5. blockhash 必须是 base-58 编码的

​

最佳实践

1. 根据需求使用适当的 commitment 级别
2. 在适当时缓存结果以减少 RPC 负载
3. 在发送交易之前检查 blockhash 有效性
4. 考虑使用 WebSocket 订阅获取实时更新
5. 适当处理网络错误并重试

​

常见错误

​

用例

1. Blockhash 验证
   interface BlockhashValidation {
     blockhash: string;
     validity: { isValid: boolean; checkedAt: number; };
     config: { commitment?: string; minContextSlot?: number; };
   }
   
   class BlockhashValidator {
     async validateBlockhash(
       blockhash: string,
       config: { commitment?: string; minContextSlot?: number; }
     ): Promise<BlockhashValidation> {
       const isValid = await connection.isBlockhashValid(blockhash, config);
       return {
         blockhash,
         validity: { isValid, checkedAt: Date.now() },
         config: { commitment: config.commitment, minContextSlot: config.minContextSlot }
       };
     }
   }
   
2. Blockhash 监控
   interface BlockhashStatus {
     blockhash: string;
     status: { isValid: boolean; lastChecked: number; checkCount: number; };
     history: Array<{ timestamp: number; isValid: boolean; }>;
   }
   
   class BlockhashMonitor {
     private statuses: Map<string, BlockhashStatus> = new Map();
     
     async monitorBlockhash(
       blockhash: string,
       config: { commitment?: string; minContextSlot?: number; }
     ): Promise<BlockhashStatus> {
       const isValid = await connection.isBlockhashValid(blockhash, config);
       const now = Date.now();
       
       let status = this.statuses.get(blockhash);
       if (!status) {
         status = {
           blockhash,
           status: { isValid, lastChecked: now, checkCount: 1 },
           history: [{ timestamp: now, isValid }]
         };
       } else {
         status.status.isValid = isValid;
         status.status.lastChecked = now;
         status.status.checkCount++;
         status.history.push({ timestamp: now, isValid });
       }
       
       this.statuses.set(blockhash, status);
       return status;
     }
   }
   
3. 交易规划
   interface TransactionPlan {
     blockhash: string;
     validity: { isValid: boolean; checkedAt: number; };
     recommendations: Array<{ type: 'proceed' | 'retry' | 'abort'; reason: string; }>;
     metadata: { timestamp: number; };
   }
   
   class TransactionPlanner {
     private readonly maxRetries = 3;
     private readonly validityCheckInterval = 1000;
     
     async planTransaction(
       blockhash: string,
       config: { commitment?: string; minContextSlot?: number; }
     ): Promise<TransactionPlan> {
       const isValid = await connection.isBlockhashValid(blockhash, config);
       const now = Date.now();
       const recommendations: Array<{ type: 'proceed' | 'retry' | 'abort'; reason: string; }> = [];
       
       if (isValid) {
         recommendations.push({ type: 'proceed', reason: 'Blockhash is valid' });
       } else {
         recommendations.push({ type: 'abort', reason: 'Blockhash is invalid' });
         recommendations.push({ type: 'retry', reason: 'Get a new blockhash and retry' });
       }
       
       return {
         blockhash,
         validity: { isValid, checkedAt: now },
         recommendations,
         metadata: { timestamp: now }
       };
     }
     
     async waitForValidBlockhash(
       blockhash: string,
       config: { commitment?: string; minContextSlot?: number; }
     ): Promise<boolean> {
       let retries = 0;
       while (retries < this.maxRetries) {
         const isValid = await connection.isBlockhashValid(blockhash, config);
         if (isValid) { return true; }
         retries++;
         await new Promise(resolve => setTimeout(resolve, this.validityCheckInterval));
       }
       return false;
     }
   }