Demo application generates the requests with random value of rub and then converts it to usd with using contracts Calculator and Oracle. Inside Converter.sol there are two solidity smart contracts:

1. Calculator is dedicated for conversion from rub to usd according current day rate of usd from CRB
2. Oracle is dedicated for getting request of current day usd rate outside of blockchain and executing the Calculator above

Both contracts above were converted (more precisly were adapted) into c# classes Calculator.cs and Oracle.cs with using framework Nethereum

    <PackageReference Include="Nethereum.Web3" Version="3.4.0" />
    <PackageReference Include="Serilog.Sinks.File" Version="4.1.0" />

All logs with result of conversion from solidity contract Calculator are accessed by https://localhost:5001/log?file=log.txt, where file is the path to log file log.txt

1. First, to test the conversion from rub to usd, use TestChain. So, for linux:

   Launch >> geth-clique-linux > startgeth.sh

   Note: use chmod +x startgeth.sh and chmod +x geth to allow geth to execute.

2. Then do the dotnet run to run the demo of conversion rub to usd. Console should show something like this:

   Contract address 0x2a89a49ece5e7211f4ca99ff2df2de85b4fac485 from thread # 12: 390,7407 rub => 6,1177 usd with rate 1 usd = 63,8699 rub