ZeppelinOS notes

notes.txt

pragma solidity ^0.5.0;

import "zos-lib/contracts/Initializable.sol";

contract MyContract is Initializable {

  uint256 public x;
  string public s;

  // the 'initializer' modifier prevents the function from being called more than once.
  function initialize(uint256 _x, string memory _s) initializer public {
    x = _x;
    s = _s;
  }
}



npx zos init my-project

npm install truffle@5.0.4
npm install zos-lib
# add contract to project
npx zos add MyContract 

# push is intended for logic contracts only
npx zos push

# create contract to interact with (proxy)
npx zos create MyContract --init initialize --args 42,hitchhiker


npx truffle console --network local


truffle(local)> myContract = await MyContract.at('0xBe0B0f08A599F07699E98A9D001084e97b9a900A')
undefined
truffle(local)> (await myContract.x()).toString()
'42'
truffle(local)>  myContract.s()
'hitchhiker'

# upgrade contract
npx zos push
npx zos update MyContract



# install openzeppelin-eth contracts locally
npx zos link openzeppelin-eth
npx zos add MyLinkedContract

npx zos link npm-module>

npx zos push --deploy-dependencies