getTokenSupply

​

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": "getTokenSupply",
  "params": [
    "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"
  ]
}'

​

使用 web3.js

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

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

// Get token supply
const mint = new PublicKey('EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v');
const supply = await connection.getTokenSupply(mint);
console.log('Token supply:', supply);

// Get token supply with analysis
async function getTokenSupplyWithAnalysis(
  mint: PublicKey,
  config: { commitment?: string }
) {
  const supply = await connection.getTokenSupply(mint, config);
  
  return {
    supply,
    analysis: {
      rawAmount: BigInt(supply.value.amount),
      formattedAmount: supply.value.uiAmountString,
      decimals: supply.value.decimals,
      metadata: {
        timestamp: Date.now(),
        commitment: config.commitment
      }
    }
  };
}

​

注意事项

1. 返回代币铸造的总供应量
2. 供应量包括所有流通中的代币
3. 响应是即时的，因为它从当前状态读取
4. 供应量可能随代币铸造和销毁而变化
5. 铸造必须是有效的代币铸造

​

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. 监控代币供应量的变化
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. 代币供应分析
   interface TokenSupplyAnalysis {
     mint: string;
     supply: {
       rawAmount: string;
       formattedAmount: string;
       decimals: number;
     };
     metrics: {
       maxSupply?: string;
       burnedAmount?: string;
       circulatingSupply?: string;
       inflationRate?: number;
     };
     metadata: {
       timestamp: number;
       commitment?: string;
     };
   }
   
   class TokenSupplyAnalyzer {
     private readonly maxSupply: Record<string, bigint> = {
       'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v': BigInt(1000000000000000) // USDC
     };
     
     async analyzeTokenSupply(
       mint: PublicKey,
       config: { commitment?: string }
     ): Promise<TokenSupplyAnalysis> {
       const supply = await connection.getTokenSupply(mint, config);
       const rawAmount = BigInt(supply.value.amount);
       const maxSupply = this.maxSupply[mint.toBase58()];
       
       return {
         mint: mint.toBase58(),
         supply: {
           rawAmount: supply.value.amount,
           formattedAmount: supply.value.uiAmountString!,
           decimals: supply.value.decimals
         },
         metrics: {
           maxSupply: maxSupply?.toString(),
           burnedAmount: maxSupply ? (maxSupply - rawAmount).toString() : undefined,
           circulatingSupply: supply.value.uiAmountString,
           inflationRate: maxSupply ? Number((rawAmount * BigInt(100)) / maxSupply) : undefined
         },
         metadata: {
           timestamp: Date.now(),
           commitment: config.commitment
         }
       };
     }
   }
   
2. 代币供应监控
   interface TokenSupplyChange {
     mint: string;
     changes: {
       previousAmount: string;
       currentAmount: string;
       difference: string;
       percentageChange: number;
     };
     metadata: {
       timestamp: number;
     };
   }
   
   class TokenSupplyMonitor {
     private previousSupply: Map<string, string> = new Map();
     
     async monitorTokenSupply(
       mint: PublicKey,
       config: { commitment?: string }
     ): Promise<TokenSupplyChange | null> {
       const supply = await connection.getTokenSupply(mint, config);
       const currentAmount = supply.value.amount;
       const previousAmount = this.previousSupply.get(mint.toBase58());
       
       if (previousAmount && previousAmount !== currentAmount) {
         const difference = BigInt(currentAmount) - BigInt(previousAmount);
         const percentageChange = Number((difference * BigInt(100)) / BigInt(previousAmount));
         
         this.previousSupply.set(mint.toBase58(), currentAmount);
         
         return {
           mint: mint.toBase58(),
           changes: {
             previousAmount,
             currentAmount,
             difference: difference.toString(),
             percentageChange
           },
           metadata: {
             timestamp: Date.now()
           }
         };
       }
       
       this.previousSupply.set(mint.toBase58(), currentAmount);
       return null;
     }
   }
   
3. 代币供应规划
   interface TokenSupplyPlan {
     mint: string;
     currentSupply: {
       rawAmount: string;
       formattedAmount: string;
       decimals: number;
     };
     recommendations: Array<{
       type: 'mint' | 'burn' | 'freeze';
       amount?: string;
       reason: string;
     }>;
     metadata: {
       timestamp: number;
     };
   }
   
   class TokenSupplyPlanner {
     private readonly targetInflationRate = 0.02; // 2% annual inflation
     private readonly maxSupply: Record<string, bigint> = {
       'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v': BigInt(1000000000000000) // USDC
     };
     
     async planTokenSupply(
       mint: PublicKey,
       config: { commitment?: string }
     ): Promise<TokenSupplyPlan> {
       const supply = await connection.getTokenSupply(mint, config);
       const rawAmount = BigInt(supply.value.amount);
       const maxSupply = this.maxSupply[mint.toBase58()];
       
       const recommendations: Array<{
         type: 'mint' | 'burn' | 'freeze';
         amount?: string;
         reason: string;
       }> = [];
       
       if (maxSupply) {
         const currentInflationRate = Number((rawAmount * BigInt(100)) / maxSupply) / 100;
         const targetAmount = maxSupply * BigInt(Math.floor(this.targetInflationRate * 100)) / BigInt(100);
         
         if (currentInflationRate > this.targetInflationRate) {
           const burnAmount = rawAmount - targetAmount;
           recommendations.push({
             type: 'burn',
             amount: burnAmount.toString(),
             reason: `Current inflation rate (${(currentInflationRate * 100).toFixed(2)}%) exceeds target (${(this.targetInflationRate * 100).toFixed(2)}%)`
           });
         } else if (currentInflationRate < this.targetInflationRate) {
           const mintAmount = targetAmount - rawAmount;
           recommendations.push({
             type: 'mint',
             amount: mintAmount.toString(),
             reason: `Current inflation rate (${(currentInflationRate * 100).toFixed(2)}%) below target (${(this.targetInflationRate * 100).toFixed(2)}%)`
           });
         }
       }
       
       return {
         mint: mint.toBase58(),
         currentSupply: {
           rawAmount: supply.value.amount,
           formattedAmount: supply.value.uiAmountString!,
           decimals: supply.value.decimals
         },
         recommendations,
         metadata: {
           timestamp: Date.now()
         }
       };
     }
   }