Prepare Top-Up Transaction

curl --request POST \
  --url https://orbitflare.com/api/customer/v2/topup/prepare \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 5002.5,
  "wallet_address": "<string>"
}
'

{
  "success": true,
  "message": "<string>",
  "data": {
    "transaction": "<string>",
    "memo": "<string>",
    "amount_usdc": 123,
    "amount_micro_usdc": 123,
    "destination_wallet": "<string>",
    "blockhash": "<string>",
    "last_valid_block_height": 123
  }
}