Introduce yourself here!

Sanjay · May 22, 2019, 7:05am

Hi all, My name is Sanjay. I am from Goa (India). I am learning about the various blockchain platforms. Currently I am exploring ethereum. I am here to explore how to write good smart contracts.

abcoathup · May 22, 2019, 7:39am

Welcome to the community @Sanjay

A great place to start is going through the existing guides in #general:guides-and-tutorials category. Please let us know if you have any feedback on what we can improve on.

Ethernaut is a fun way to learn about smart contract security and there are Ethernaut Community Solutions for many of the levels.

If you have any questions, please let us know in the forum. Thanks

bugduino · May 22, 2019, 9:06am

Hi everyone, my name is William and I’m a developer from Italy.
I’ve been working as a front-end developer for most of my carrer, but in the last year and a half I started learning and building on Ethereum.
I’m currently working on a defi project built on top of various lending protocols, and I’m trying to use zeppelinOS

abcoathup · May 22, 2019, 11:48am

Hi @bugduino thanks for introducing yourself. Great to have you here.

Let us know if you have any questions on using ZeppelinOS.

jijordre · May 23, 2019, 11:57am

Howdy,

My name is Jens Ivar Jørdre. I am Chief Science Officer of Hubii AS and develop smart contracts for our Ethereum 2nd layer scaling solution nahmii. Home base is Bergen, Norway.

jimthematrix · May 23, 2019, 2:11pm

hi everyone! Jim Zhang from kaleido.io. We are a startup as part of ConsenSys and working in partnership with AWS and Microsoft to provide cloud based blockchain as a service platform.

We’ve been using OpenZeppelin for our need in high quality Solidity code, in particular when we recently announced our tokens support in Consensus2019.

Met @albert and got introduced to this community. Mainly want to participate and contribute to the growing coverage of the OpenZeppelin library for common patterns such as Hashed Timelock based Atomic Swaps. Really excited to be here!

abcoathup · May 24, 2019, 12:44am

Hi @jijordre welcome to the community and thanks for introducing yourself.

Let us know if you have any questions.

abcoathup · May 24, 2019, 1:00am

Welcome to the community @jimthematrix

Is Kaleido mostly Enterprise Ethereum or are you also providing non-Ethereum based chains to your customers?

Would appreciate other suggestions on smart contracts that would benefit the OpenZeppelin library.

If you use ERC777 would be great to get input on the OpenZeppelin ERC777 implementation:

OpenZeppelin 2.3.0: Release Candidate

ERC777

The long awaited sequel to ERC20 is here. The EIP is almost finalized, and OpenZeppelin has an implementation of it. Please note that this code has not been audited yet . An audit will be performed soon, but for now we need you all to look at it and review it from top to bottom . The main source file is here at ERC777.sol . Anything you see, drop us a line in this thread or via email at security@openzeppelin.org. Letting us know that you’ve looked at it and found nothing is also valuable!
[/quote]

Also you are welcome to join the Discussion about ERC20Migrator and related issues

abcoathup · May 27, 2019, 2:05am

Hi @jijordre can you share with the community what the Hubii project is?

It would also be great if you could give some details on the layer 2 scaling solution nahmii that you have created?

abcoathup · May 27, 2019, 2:07am

Hi @bugduino can you share any details on the DEFI project that you are building?

You have already raised the issue of how to accept ERC20 tokens. What other types of issues are you facing?

How are you planning to use ZeppelinOS?

bugduino · May 27, 2019, 8:43am

I’m currently building a dapp, with an easy ui/ux in mind, which interacts with different lending protocols and allows you to lend at the best rate available. I integrated Compound v2 for the moment and I plan to add others in the following weeks. The contract is trustless and never in posessions of user’s tokens at the end of every tx, so it acts as a proxy only.

I’m trying to use zos to have a way to upgrade contracts in case of something unexpected happens or for adding small features to the contracts already deployed. I had experienced some issues during unit testing with zos, but the upgradable pattern is working like a charm!

abcoathup · May 27, 2019, 8:50am

Hi @bugduino

Good to hear that ZeppelinOS upgradable pattern is working like a charm.

Would appreciate any feedback that you can provide on your use of ZeppelinOS and anything that we can do to improve the documentation and guides.

shubhamy2015 · June 3, 2019, 7:52am

Hello everyone,

My name is Shubham Yadav. I am from Pune (India). I am working on project (in case you wanna have a look, http://v-o-v.io) which combines digital art and Blockchain technology. It requires a smart contract to store the ownership of the digital arts (ERC-721) and to allow its trading.

I am using Zeppelin as the framework and truffle for deployment purpose. Before this, I co-founded coindelta.com which was a cryptocurrencies exchanges based out of India. I am an IIT Bombay 2015 alumni.

Its a pleasure to be here guys

abcoathup · June 10, 2019, 12:10am

Welcome @shubhamy2015 Thanks for introducing yourself.

VoV looks interesting. Can you tell us more about the blockchain component of the project? (e.g. what did you use from OpenZeppelin for the project? what is stored in the ERC721? I assume you are running on mainnet?)

What is up next for you? (assuming the blockchain component of VoV is done)

shanefontaine · June 11, 2019, 8:10pm

Hello everyone I am an Ethereum developer and am excited to build on and with Zeppelin.

I am working on an easy-to-use wallet called Athereum with @chris.whinfrey and @miguelmota. We are going to use ZeppelinOS for upgradability and will make an EVM package as well.

I hope to help contribute to all the work that Zeppelin does for the community.

abcoathup · June 12, 2019, 4:17am

Welcome to the community @shanefontaine.

Can you share more details on Authereum?

Awesome that you are going to use ZeppelinOS and make an EVM package too. Please let us know How good are our docs, and how would you improve them? or request a guide or tutorial. Especially in relation to your experiences developing with ZeppelinOS and creating EVM packages.

abcoathup · June 12, 2019, 4:26am

Welcome to the community @miguelmota

Awesome that you wrote a book, especially love the focus that it is all the things that you wish you had known when you started.

Would love your input on how we can help improve our guides and tutorials.

piedup · June 18, 2019, 7:01am

Hi everyone.

My name is Pierre. I work at Sorare as senior dev and based in Paris. We’re using openzeppelin ERC721 smart contract for our crypto goods. I’m here to learn more about solidity best practices.

Best
Pierre

abcoathup · June 18, 2019, 8:57am

Wecome @piedup to the community forum!

I have checked out sorare previously. I thought I already had a sorare card, but looks like I haven’t purchased one yet.

OpenZeppelin repository is a great place to learn about Solidity best practices.

The Guidelines and Code Style documents are great reads:

github.com

OpenZeppelin/openzeppelin-solidity/blob/master/GUIDELINES.md

Design Guidelines
=======

These are some global design goals in OpenZeppelin.

#### D0 - Security in Depth
We strive to provide secure, tested, audited code. To achieve this, we need to match intention with function. Thus, documentation, code clarity, community review and security discussions are fundamental.

#### D1 - Simple and Modular
Simpler code means easier audits, and better understanding of what each component does. We look for small files, small contracts, and small functions. If you can separate a contract into two independent functionalities you should probably do it.

#### D2 - Naming Matters

We take our time with picking names. Code is going to be written once, and read hundreds of times. Renaming for clarity is encouraged.

#### D3 - Tests

Write tests for all your code. We encourage Test Driven Development so we know when our code is right. Even though not all code in the repository is tested at the moment, we aim to test every line of code in the future.

#### D4 - Check preconditions and post-conditions

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github.com

OpenZeppelin/openzeppelin-solidity/blob/master/CODE_STYLE.md

# Code Style

We value clean code and consistency, and those are prerequisites for us to
include new code in the repository. Before proposing a change, please read this
document and take some time to familiarize yourself with the style of the
existing codebase.

## Solidity code

In order to be consistent with all the other Solidity projects, we follow the
[official recommendations documented in the Solidity style guide](http://solidity.readthedocs.io/en/latest/style-guide.html).

Any exception or additions specific to our project are documented below.

### Naming

* Try to avoid acronyms and abbreviations.

* All state variables should be private.

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I would recommend (if you haven’t already) linting contracts and tests, OpenZeppelin style is good to follow:

github.com

OpenZeppelin/openzeppelin-solidity/blob/master/.solhint.json

{
  "extends": "solhint:recommended",
  "rules": {
    "indent": ["error", 4],
    "func-order": "off",
    "bracket-align": "off",
    "compiler-fixed": "off",
    "no-simple-event-func-name": "off",
    "separate-by-one-line-in-contract": "off",
    "two-lines-top-level-separator": "off",
    "mark-callable-contracts": "off",
    "compiler-version": ["error", "^0.5.0"]
  }
}

github.com

OpenZeppelin/openzeppelin-solidity/blob/master/.eslintrc

{
  "extends" : [
    "standard",
    "plugin:promise/recommended",
  ],
  "plugins": [
    "mocha-no-only",
    "promise",
  ],
  "env": {
    "browser" : true,
    "node"    : true,
    "mocha"   : true,
    "jest"    : true,
  },
  "globals" : {
    "artifacts": false,
    "contract": false,
    "assert": false,
    "web3": false,

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100% code coverage for your tests is a great target.

Would appreciate if you have any suggestions for Guides and Tutorials requests that the community needs, that would be great.

martriay · June 18, 2019, 2:13pm

Hello Pierre, welcome! Glad yo have you here

How did you find out about the forum?

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Introduce yourself here!

ERC777

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