private RawTransaction create1559Transaction(final BigInteger chainId) {
    return RawTransaction.createEtherTransaction(
        chainId.longValueExact(),
        getNonce(),
        INTRINSIC_GAS,
        recipient.getAddress(),
        Convert.toWei(transferAmount, transferUnit).toBigIntegerExact(),
        BigInteger.ZERO,
        gasPrice);
  }
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