Mako2

Requirements:

• NodeJs - https://nodejs.org/en/download/
• Truffle - https://www.trufflesuite.com/truffle
• Metamask - https://metamask.io/download.html

In the blockchain that you are using, you need to enable websocket. If you are using the Hyperledger Besu client, you can find instructions here

Instructions

1. Clone the repository to the user's home directory and go to the project directory:

cd "${HOME}" && git clone https://github.com/kostiask/Mako2.git && cd Mako2

2. Go to directory Oracle:

cd Oracle

3. Install modules:

npm install

4. Into truffle-config.js put blockchain and account data:

development: {
      host: '<host blockchain>',
      port: <port>,
      network_id: '*',
      from: <address account>
    }

If using a client Besu.

Besu does not support private key management. To use Besu with Truffle, you must configure a Truffle wallet. To install a Truffle wallet:

npm install --save @truffle/hdwallet-provider

To add the wallet provider, update the truffle-config.js file in the project directory. Replace:

• with the JSON-RPC endpoint (IP address and port) of a Besu node.
• with the private key of an Ethereum account containing Ether.

const PrivateKeyProvider = require("@truffle/hdwallet-provider");
const privateKey = "<account-private-key>";
const privateKeyProvider = new PrivateKeyProvider(privateKey, "<JSON-RPC-http-endpoint>");

5. Compile Smart Contract:

truffle compile

6. Deploy Smart Contract:

truffle migrate

If you using Besu:

truffle migrate --network besuWallet

After executing the command from point 6 of the instruction, the terminal will display the address of the new Oracle smart contract:

7. The address of the smart contract Oracle from point 6 of the instruction must be placed in the js_Oracle/index.js file:

const addressOracle = "<address-Oracle-contract>";

and in the dapp/contracts/oracleAPI.sol file:

address OracleAddress = <address-Oracle-contract>;

8. Go to directory js_Oracle:

cd ../js_Oracle

9. Install modules:

npm install

10. In index.js put blockchain websocket address:

web3 = new Web3(new Web3.providers.WebsocketProvider('<blockchain-websocket>'));

11. In index.js put private account key(0x.....) on which there is ether for signing transactions:

const privateKey = "<private-key-account>";

12. Start an application:

node index.js

13. In the new terminal window, go from the main directory to the dapp directory

cd dapp

14. Install modules:

npm install

15. Follow step 2 from the instructions for the file truffle-config.js.

16. Compile Smart Contracts:

truffle compile

17. Deploy Smart Contracts:

truffle migrate

If you using Besu:

truffle migrate --network besuWallet

After executing the command from point 17 of the instruction, the terminal will display the address of the new RDF smart contract: 18. The address of the smart contract RDF from point 17 of the instruction must be placed in the dapp/client/src/app.js file:

address: "<smart-contract-RDF-address>",

19. From root directory, go to the directory server:

cd ../server

20. Start server, which will return the graph:

node server.js

21. In a new terminal window, from the root directory, go to the directory dapp/client

cd dapp/client

22. Install module:

npm install

23. Start app:

npm run dev

Metamask

1. In Metamask connect to your blockchain network.