private RawTransaction createRawTransaction() {
    return transactionType == TransactionType.FRONTIER
        ? createFrontierTransaction()
        : create1559Transaction(chainId.orElseThrow());
  }
Number of GAS units that the transaction will cost.
acceptance-tests/dsl/src/main/java/org/hyperledger/besu/tests/acceptance/dsl/transaction/account/TransferTransaction.java