Something that was highlighted in a discussion today. The same CorDapp (same source code no difference) was deployed in both Party A and B. However, the CorDapp in party A was compiled a week ago. When party B tried to create a transaction with A, it doesn't work and you get an exception as net.corda.core.contracts.TransactionverificationException$ContractCOnstraintRejection@: Contract constraints failed for net-corda.training.contract.IOUContract, transaction: tx hash. Is this a valid observation?
The log outputs the following exception using the IOUContract as an example:
public class VisaTypeAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
Context context;
private List<VisaType> visaTypeList;
int selected_position;
public VisaTypeAdapter(Context context, List<VisaType> visaTypeList) {
this.context = context;
this.visaTypeList = visaTypeList;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.visa_type_row, parent, false);
return new jp.workjapan.adapters.VisaTypeAdapter.ViewHolder(view);
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
final VisaType a = visaTypeList.get(position);
final jp.workjapan.adapters.VisaTypeAdapter.ViewHolder viewHolder = (jp.workjapan.adapters.VisaTypeAdapter.ViewHolder) holder;
viewHolder.visa_eng.setText(a.getName_en());
viewHolder.visa_jp.setText(a.getName_jp());
final long id = a.getId();
if (id == AppSingleTon.visaType) {
viewHolder.visa_layout.setSelected(true);
} else {
viewHolder.visa_layout.setSelected(false);
}
viewHolder.visa_layout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (viewHolder.visa_layout.isSelected()) {
viewHolder.visa_layout.setSelected(false);
} else {
viewHolder.visa_layout.setSelected(true);
AppSingleTon.visaType = id;
selected_position = position;
}
}
});
}
}
答案 0 :(得分：1)
一个遗漏的问题是：
同一个cordapp-jar分配给两台机器吗？通过这个我并不意味着相同的源代码分布，然后独立编译，我的意思是一个编译，然后在两个节点上运行的结果。在Corda达到电线稳定性之前，编译环境中的任何差异（无论多么微小）都可能导致错误，例如您遇到的错误。
答案 1 :(得分：0)
正如Richard所说，对于一组给定的CorDapp源文件，生成的CorDapp JAR的哈希值不确定。
一个关键原因是JAR仍然包含时间戳。请参阅https://docs.corda.net/head/cordapp-build-systems.html#creating-the-cordapp-jar。