Getting error in truffle migrate

Question

I am trying to compile a sample solidity contract,sampleapp.sol. The code is given below:

pragma solidity >=0.4.21 <0.6.0;

contract SimpleStorage {
    uint storedData;

    function set(uint x) public {
        storedData = x;
    }

    function get() public view returns (uint) {
        return storedData;
    }
}

The migration code is given below:

pragma solidity >=0.4.21 <0.6.0;

contract Migrations {
  address public owner;
  uint public last_completed_migration;

  constructor() public {
    owner = msg.sender;
  }

  modifier restricted() {
    if (msg.sender == owner) _;
  }

  function setCompleted(uint completed) public restricted {
    last_completed_migration = completed;
  }

  function upgrade(address new_address) public restricted {
    Migrations upgraded = Migrations(new_address);
    upgraded.setCompleted(last_completed_migration);
  }
}

The code for migration code js is given below (file 1_initial_migration.js):

var sampleapp = artifacts.require("./sampleapp.sol");
const Migrations = artifacts.require("./Migrations.sol");

module.exports = function(deployer) {
  deployer.deploy(sampleapp);
  deployer.deploy(Migrations);
};

The error i am geting is:

I am making this app over Eleven01 protocol. I have added their custom RPC in the Metamask. Please let me know if you require further details. Any help is appreciated.

Answer 1

Maybe you should keep the name of the file consistent with the contract name. sampleapp.sol

pragma solidity >=0.4.21 <0.6.0;

contract Sampleapp {
    uint storedData;

    function set(uint x) public {
        storedData = x;
    }

    function get() public view returns (uint) {
        return storedData;
    }
}

Answer 2

As mentionned in truffle documentation your should create a new file for each migration.

But i think your main issue come from the ./ in your migration file.

Try like that.

1_initial_migration.js

const Migrations = artifacts.require("Migrations.sol");

module.exports = function(deployer) {
  deployer.deploy(Migrations);
};

2_sampleapp_migration.js

const sampleapp = artifacts.require("sampleapp.sol");

module.exports = function(deployer) {
  deployer.deploy(sampleapp);
};