latestLedger string - The latest ledger known to Soroban-RPC at the time it handled the sendTransaction() request.
latestLedgerCloseTime string - The unix timestamp of the close time of the latest ledger known to Soroban-RPC at the time it handled the sendTransaction() request.
errorResultXdr string (optional) - If the transaction status is ERROR, this will be a base64 encoded string of the raw TransactionResult XDR struct containing details on why stellar-core rejected the transaction.