addAssetDetails sets the details for `a` on `result` using keys with `prefix`.

operation xdr.Operation, operationIndex int32, transaction ingest.LedgerTransaction, ledgerSeq int32.

TransformOperation converts an operation from the history archive ingestion system into a form suitable for BigQuery.

OperationOutput is a representation of an operation that aligns with the BigQuery table history_operations.

transactionOperationWrapper represents the data for a single operation within a transaction.