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

# getMaxRetransmitSlot

> Returns the highest slot that can be retransmitted

## Parameters

This method does not take any parameters.

## Response

<ResponseField name="result" type="number">
  The highest slot that can be retransmitted
</ResponseField>

## Code Examples

### Basic Request

```bash theme={null}
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": "getMaxRetransmitSlot"
}'
```

### Using web3.js

```typescript theme={null}
import { Connection } from '@solana/web3.js';

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

// Get max retransmit slot
const maxRetransmitSlot = await connection.getMaxRetransmitSlot();
console.log('Max retransmit slot:', maxRetransmitSlot);

// Check if a slot can be retransmitted
async function canRetransmitSlot(slot: number) {
  const maxRetransmitSlot = await connection.getMaxRetransmitSlot();
  return slot <= maxRetransmitSlot;
}

// Get retransmit range
async function getRetransmitRange() {
  const maxRetransmitSlot = await connection.getMaxRetransmitSlot();
  const firstAvailableBlock = await connection.getFirstAvailableBlock();
  
  return {
    startSlot: firstAvailableBlock,
    endSlot: maxRetransmitSlot,
    totalSlots: maxRetransmitSlot - firstAvailableBlock + 1
  };
}
```

## Notes

1. Returns the highest slot that can be retransmitted
2. Used to determine the range of slots available for retransmission
3. The response is immediate as it reads from the current state
4. Slots beyond this value cannot be retransmitted
5. This value can change as the node prunes old data

## Best Practices

1. Use this method to determine retransmission availability
2. Cache results when appropriate to reduce RPC load
3. Consider the impact of slot pruning
4. Monitor for changes in max retransmit slot
5. Use in conjunction with other slot-related methods

## Common Errors

| Code   | Message                      | Solution                                     |
| ------ | ---------------------------- | -------------------------------------------- |
| -32601 | Method not found             | Verify you're connected to a Solana RPC node |
| -32007 | Slot information unavailable | Node may be bootstrapping or syncing         |

## Use Cases

1. **Retransmission Planning**
   ```typescript theme={null}
   interface RetransmitPlan {
     startSlot: number;
     endSlot: number;
     totalSlots: number;
     availableSlots: number[];
     missingSlots: number[];
   }

   async function planRetransmission(
     targetSlots: number[]
   ): Promise<RetransmitPlan> {
     const maxRetransmitSlot = await connection.getMaxRetransmitSlot();
     const firstAvailableBlock = await connection.getFirstAvailableBlock();
     
     const availableSlots = targetSlots.filter(
       slot => slot >= firstAvailableBlock && slot <= maxRetransmitSlot
     );
     
     const missingSlots = targetSlots.filter(
       slot => slot < firstAvailableBlock || slot > maxRetransmitSlot
     );
     
     return {
       startSlot: firstAvailableBlock,
       endSlot: maxRetransmitSlot,
       totalSlots: maxRetransmitSlot - firstAvailableBlock + 1,
       availableSlots,
       missingSlots
     };
   }
   ```

2. **Slot Availability Monitoring**
   ```typescript theme={null}
   interface SlotAlert {
     type: 'pruned' | 'unavailable';
     message: string;
     slot: number;
     maxRetransmitSlot: number;
   }

   class SlotMonitor {
     private previousMaxSlot: number | null = null;
     
     async monitorSlots(
       targetSlots: number[]
     ): Promise<SlotAlert[]> {
       const maxRetransmitSlot = await connection.getMaxRetransmitSlot();
       const alerts: SlotAlert[] = [];
       
       // Check for pruned slots
       if (this.previousMaxSlot !== null && maxRetransmitSlot < this.previousMaxSlot) {
         alerts.push({
           type: 'pruned',
           message: `Slots ${maxRetransmitSlot + 1} to ${this.previousMaxSlot} have been pruned`,
           slot: this.previousMaxSlot,
           maxRetransmitSlot
         });
       }
       
       // Check target slots availability
       for (const slot of targetSlots) {
         if (slot > maxRetransmitSlot) {
           alerts.push({
             type: 'unavailable',
             message: `Slot ${slot} is beyond max retransmit slot`,
             slot,
             maxRetransmitSlot
           });
         }
       }
       
       this.previousMaxSlot = maxRetransmitSlot;
       return alerts;
     }
   }
   ```

3. **Historical Data Management**
   ```typescript theme={null}
   interface HistoricalData {
     availableRange: {
       start: number;
       end: number;
       total: number;
     };
     prunedSlots: number[];
     availableSlots: number[];
     metadata: {
       timestamp: number;
       maxRetransmitSlot: number;
     };
   }

   async function manageHistoricalData(
     targetRange: { start: number; end: number }
   ): Promise<HistoricalData> {
     const maxRetransmitSlot = await connection.getMaxRetransmitSlot();
     const firstAvailableBlock = await connection.getFirstAvailableBlock();
     
     const availableSlots = [];
     const prunedSlots = [];
     
     for (let slot = targetRange.start; slot <= targetRange.end; slot++) {
       if (slot >= firstAvailableBlock && slot <= maxRetransmitSlot) {
         availableSlots.push(slot);
       } else {
         prunedSlots.push(slot);
       }
     }
     
     return {
       availableRange: {
         start: firstAvailableBlock,
         end: maxRetransmitSlot,
         total: maxRetransmitSlot - firstAvailableBlock + 1
       },
       prunedSlots,
       availableSlots,
       metadata: {
         timestamp: Date.now(),
         maxRetransmitSlot
       }
     };
   }
   ```