Sample smart contract to create your own token: The same code, but with a hard-coded name, symbol and initial supply: Sources:https://docs.openzeppelin.com/contracts/4.x/erc20https://solidity-by-example.org/app/erc20/https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.0.0/contracts/token/ERC20/ERC20.sol
Author Archives: Karol
Problem with disabled WiFi and Unknown USB Device (Device Descriptor Request Failed)
TLDR:disable unknown USB device -> disable wifi -> hibernate -> plug off power cable -> turn on laptop –> enable wifi WiFi card: Intel(R) Wireless-AC 9560 160MHz Errors:Error (status): This device cannot start. (Code 10)Error (status): Windows has stopped this device because it has reported problems. (Code 43) When fail all methods that you tryContinue reading “Problem with disabled WiFi and Unknown USB Device (Device Descriptor Request Failed)”
Mock IConfigurate in xUnit
If you want mock IConfiguration use following code: or copy secrets.json configuration file to output directory: projectName\bin\Debug\netcoreapp3.1 and then use following code in ContextFixture: Config json file e.g. secrets.json:
Secret storage in .NET
Enable secret storage:Type “dotnet user-secrets init” into Package Manager Console <UserSecretsId> can be found in .csproj file. Set a secret (Package Manager Console):dotnet user-secrets set “ApiKey” “test123” or to remove it:dotnet user-secrets remove “ApiKey” To check if exists:dotnet user-secrets listorManage secret through GUI -> right click on project -> Manage User Secrets -> it opensContinue reading “Secret storage in .NET”
The term ‘dotnet-ef’ is not recognized – Entity Framework error
Quick post about fixing Entity Framework, probably common error when you want to use ef for the first time e.g. you installed Visual Studio on new pc, fresh os, new project etc. and want to make dotnet-ef migrations or database update. Error message:“dotnet-ef : The term ‘dotnet-ef’ is not recognized as the name of aContinue reading “The term ‘dotnet-ef’ is not recognized – Entity Framework error”
Scaffolding in .NET Core (generate API controllers – CRUD (or MVC controller with views in necessary)
Right click on ‘Controllers’ folder –> Add –> New Scaffolded Item… For api controller without views select ‘API Controller with actions, using Entity Framework’ and click ‘Add’.If MVC then choose ‘MVC Controller with views, using using Entity Framework’ On next view select your model (you need create model before generate code) and select data contextContinue reading “Scaffolding in .NET Core (generate API controllers – CRUD (or MVC controller with views in necessary)”
Background automation tasks in .NET Core – sample web application using Hangfire
It is the second post about Hangfire, but this time I am using Hangfire in web application. And there is link to previous post about Hanfire in console application:Background automation tasks in .NET – sample console application using Hangfire I will show a simple web application using Hangfire to automate tasks. First, create a new project:Continue reading “Background automation tasks in .NET Core – sample web application using Hangfire”
Get data from appsettings.json file
I will show how to get your data from appsettings.json and e.g. show it on view. First, go to an appsettings.json and add the entry. In my case, I added:“Message”: “Message from appsettings.json” All appsettings.json code looks like this: Second step, changes to the controller, let’s take a sample HomeController. So inject IConfiguration in HomeControllerContinue reading “Get data from appsettings.json file”
Background automation tasks in .NET Core – sample console application using Hangfire
I will show a simple console application using Hangfire to automate tasks. First, create a new project: Console App (.NET Core). In my case netcoreapp3.1: Install Hangfire – add packages:Hangfire.CoreHangfire.SqlServer Copy the following code to the Main method: We also need to add namespaces: And the last step, create a database. Go to SSMS andContinue reading “Background automation tasks in .NET Core – sample console application using Hangfire”
AutoMapper – map one list to another
Create a mapping from list to list: So e.g: Where ‘cars’ is of the List type and of course before it, we need to add a map to AutoMapper config with the .CreateMap and .ForMember methods for the appropriate properties if needed.
Karol memo 