Function toBase64EncodedWireTransaction

toBase64EncodedWireTransaction(
tx: string | Base64EncodedWireTransaction | Buffer<ArrayBufferLike>,
): Base64EncodedWireTransaction
Converts various transaction formats to a Base64-encoded wire transaction.

This utility function handles the conversion of different transaction input types (Buffer, string, or already encoded Base64EncodedWireTransaction) into a consistent Base64EncodedWireTransaction format that can be used with Solana RPC methods.
Parameters
- tx: string | Base64EncodedWireTransaction | Buffer<ArrayBufferLike>
  The transaction to convert. Can be:
  
  Buffer: Raw transaction bytes that will be converted to base64
  
  string: Already base64-encoded transaction string
  
  Base64EncodedWireTransaction: Already properly typed, returned as-is
Returns Base64EncodedWireTransaction
Base64-encoded wire transaction ready for RPC submission
Example
```
// Convert Buffer to base64
const txBuffer = Buffer.from([1, 2, 3]);
const base64Tx = toBase64EncodedWireTransaction(txBuffer);

// Pass through already encoded string
const encodedTx = "SGVsbG8gV29ybGQ=";
const result = toBase64EncodedWireTransaction(encodedTx);
```
- Defined in src/providers/solana/utils/toBase64EncodedWireTransaction.ts:38