
Ethereum represents the gateway to a worldwide, decentralized computing paradigm. This platform enables you to run decentralized applications (DApps) and smart contracts that have no central points of failure or control, integrate with a payment network, and operate on an open blockchain. With this practical guide, Andreas M. Antonopoulos and Gavin Wood provide everything you need to know about building smart contracts and DApps on Ethereum and other virtual-machine blockchains.

Discover why IBM, Microsoft, NASDAQ, and hundreds of other organizations are experimenting with Ethereum. This essential guide shows you how to develop the skills necessary to be an innovator in this growing and exciting new industry.

A guide to the operation and use of Ethereum and other EVM-compatible blockchains.

Mastering Ethereum


The story of the idealists, technologists, and opportunists fighting to bring cryptocurrency to the masses.

In their short history, Bitcoin and other cryptocurrencies have gone through booms, busts, and internecine wars, recently reaching a market valuation of more than $2 trillion. The central promise of crypto endures—vast fortunes made from decentralized networks not controlled by any single entity and not yet regulated by many governments.

The recent growth of crypto would have been all but impossible if not for a brilliant young man named Vitalik Buterin and his creation: Ethereum. In this book, Laura Shin takes readers inside the founding of this novel cryptocurrency network, which enabled users to launch their own new coins, thus creating a new crypto fever. She introduces readers to larger-than-life characters like Buterin, the Web3 wunderkind; his short-lived CEO, Charles Hoskinson; and Joe Lubin, a former Goldman Sachs VP who became one of crypto’s most well-known billionaires. Sparks fly as these outsized personalities fight for their piece of a seemingly limitless new business opportunity.

This fascinating book shows the crypto market for what it really is: a deeply personal struggle to influence the coming revolution in money, culture, and power.

Idealism, Greed, Lies, and the Making of the First Big Cryptocurrency Craze

The Cryptopians


Tokens - often referred to as cryptocurrencies - can represent anything from an asset to an access right, such as gold, diamonds, a fraction of a Picasso painting or an entry ticket to a concert. Tokens could also be used to reward social media contributions, incentivize the reduction of CO2 emissions, or even ones attention for watching an ad. While it has become easy to create a token, which is collectively managed by a public Web3 infrastructure like a blockchain network, the understanding of how to apply these tokens is still vague.

The industry keeps referring to “Blockchain” as different from “Bitcoin,” creating an artificial divide that is often misleading. There seems to be too little understanding about the fact that Bitcoin is a blockchain network, which is (a) globally managed by people who mostly do not know each other, and (b) enabled by the consensus protocol that (c) incentivizes all network actors for their contributions with a native token. The governance rules are tied to the minting of a native blockchain token. The Bitcoin token can, therefore, be seen as the currency of a distributed Internet tribe, called the Bitcoin network, where network actors are rewarded with Bitcoins, just as the Ether is the currency of the distributed Internet tribe Ethereum network, or Sia is the native currency of the Sia network. The Bitcoin network and other distributed ledgers all represent a collectively maintained public infrastructure and are the backbone of the next generation Internet, what the crypto community refers to as the Web3.

This book attempts to summarize existing knowledge about blockchain networks and other distributed ledgers as the backbone of the Web3, and contextualize the socio-economic implications of the Web3 applications such as smart contracts, tokens, and DAOs to the concepts of money, economics, governance and decentralized finance (DeFi).

Token Economy


Learn to Code Blockchain DApps By Building Simple Games

CryptoZombies is an interactive school that teaches you all things technical about blockchains. Learn to make smart contracts in Solidity or Libra by making your own crypto-collectibles game.

#1 Solidity Tutorial & Ethereum Blockchain Programming Course

CryptoZombies


More and more DeFi projects on Ethereum are getting hacked. This is your chance to join the party.

Each challenge can be considered standalone. Depending on the challenge, you should either stop the system from working, steal as much funds as you can, or do some other unexpected things.

Put your black hat on, and break some DeFi projects on Ethereum!

Damn Vulnerable DeFi


This is an interactive tutorial website for learning Vyper while building games using smart contracts, similar to Cryptozombies.

VyperFun


If you're a dev that's curious about crypto but not sure where to start -- this is the spot for you. Get access to project-based courses you'll love.

Learn about crypto by building cool stuff.

_buildspace


Learn How to Build a Crypto Company

The course videos from a16z’s Crypto Startup School, held in the spring of 2020, are now available to all.

Use the hours of free videos and the reading materials, to navigate the idea maze and start building crypto projects.

Hours of videos, lectures, presentations, real-world insights and fireside chats from some of the best minds in the crypto space.

a16z Crypto Startup School


Blockchain is an exciting new discipline in Computer Science. It combines a wide array of skills from math and cryptography to social sciences and understanding organizations. Understanding blockchain decentralization and how/where to apply it is a brand new skill that very few have mastered.

You will build your skills from the ground up with strong fundamentals that will provide you with the ability to adapt in this rapidly evolving ecosystem.

Choose From Multiple Paths to Begin Your Ethereum Coding Journey.

Fast-track your Ethereum Developer career in an instructor-led and challenging bootcamp focused on discussion and application!

ChainShot


This is an initiative for the early solidity developers by those who were early developers sometime.

In this approach, we are looking to categorize the smart contract according to the difficulty level in multiple standards. For now, we are keeping the standard 0 to 5(can be discussed).

This initiative needs great support from Blockchain enthusiast, developer and researchers to build this school in a way which can attract learners and provide them ease for development.

First place for early developers to learn Solidity 

solidity-school


Blockchain has emerged from the once shadowy world of cryptocurrency to become [the most in-demand skill in 2020](https://business.linkedin.com/talent-solutions/blog/trends-and-research/2020/most-in-demand-hard-and-soft-skills), according to LinkedIn. The promise of blockchain is huge. And large companies are continuing to hire and expand their blockchain teams, incl. Facebook, Amazon, Microsft, EY, Deloitte, IBM, and Oracle, to name a few. So, it should be well worth the effort to become familiar with how blockchain works, what its perceived benefits are, and as a developer starting building on top of them. 

Over the past few years, I’ve been helping and on-boarding new team members and developers into the blockchain space. This helped me to collect blogs, links, materials, and resources and see which worked well for everyone’s learning journey. It’s time to share that with a broader audience. This guide provides a starting point for developers who’re keen to learn more about blockchain and development on top of Ethereum. It will be opinionated and not contain a full list of everything available. But rather, a concise list of highly recommended options, from my own experiences. 

1. Blockchain foundations
1. Ethereum 101
1. Ethereum Development, Smart contracts & DApps 

# 1. Blockchain foundations 

New to blockchain? Let's start with a bit of the history and its foundations that motivated the creation and development of blockchain.

- [A Cyberphunk's Manifesto](https://www.activism.net/cypherpunk/manifesto.html), Eric Hughes
- [Why decentralization matters](https://onezero.medium.com/why-decentralization-matters-5e3f79f7638e), Chris Dixon
- [The Promise of the Blockchain](https://vimeo.com/161183966) (VIDEO), Vinay Gupta
- [The shift from open platforms to digital commons](http://www.bollier.org/blog/shift-open-platforms-digital-commons), David Bollier
- [Deconfusing decentralization](https://youtu.be/7S1IqaSLrq8) (VIDEO), Greg Slepak


# 2. Ethereum 101 

Now that we have an understanding where we're coming from, let's dive in a little bit deeper into the fundamental components & building blocks.

- [Bitcoin Whitepaper](https://bitcoin.org/bitcoin.pdf), Satoshi Nakamoto - the original whitepaper that started the current trend in blockchain technology: Bitcoin: A Peer-to-Peer Electronic Cash System
- [Ethereum Whitepaper](https://ethereum.org/en/whitepaper/), Vitalik Buterin - a next-generation smart contract & decentralized application platform
- [Ethereum Yellowpaper](https://ethereum.github.io/yellowpaper/paper.pdf), Gavin Wood - a more technical version of the Ethereum whitepaper
- [Smart Contracts](https://www.fon.hum.uva.nl/rob/Courses/InformationInSpeech/CDROM/Literature/LOTwinterschool2006/szabo.best.vwh.net/smart.contracts.html), Nick Szabo
- [Ethereum in 25 mins](https://youtu.be/mCzyDLanA7s) (VIDEO), Vitalik Buterin
- [How does Ethereum work, anyway](https://www.preethikasireddy.com/post/how-does-ethereum-work-anyway), Preethi Kasireddy
- [Mastering Ethereum](https://amzn.to/2VZvfz8) (BOOK), Andreas M. Antonopoulos, Gavin Wood. Or view on [Github](https://github.com/ethereumbook/ethereumbook)


# 3. Ethereum Development 


Once you've gone through all (or at least most) of the above, you should have a solid grasp of all the concepts. So now we can finally move on to the fun part: actually building stuff! 

To get a full, comprehensive overview of the Ethereum development landscape, check out:
- [Ethereum Developers](https://ethereum.org/en/developers/)
- [The full ConsenSys developer tool list](https://github.com/ConsenSys/ethereum-developer-tools-list)

The Ethereum portal covers sections per programming language, to help you filter out what's relevant for you. Though JavaScript is most commonly used, I'd start with something that you're already familiar with, to flatten the learning curve. Use the above only for future reference. As mentioned previously, I'm trying to keep it simple and offer a few recommended options, from my own experiences. Feel free to discover, try, and learn everything from the developer portals, once you've covered these.

## Other resources

Explore this site to learn more from 

- [🎓 Courses](https://www.useweb3.xyz/courses)
- [📚 Books](https://www.useweb3.xyz/books)
- [💻 Tutorials](https://www.useweb3.xyz/tutorials)
- [🏗️ Starter kits](https://www.useweb3.xyz/starter-kits)
- And more..


This guide provides a starting point for developers who’re keen to learn more about Web3

Beginners Guide to Web3


## What is a smart contract?

Smart contracts are the backbone of decentralized applications (DApps) and Web3. A smart contract is a simple program that lives on a blockchain network (such as Ethereum). They're actually not that smart. And nothing like a (legal) contract. They’re more like an executable piece of code that requires input or an trigger from an external source. They can validate those input conditions and if correct, execute their own logic to update the state on a blockchain.

## Benefits

They often serve the following purposes:
- Store and maintain data
- Manage relationships with users, or other contracts

Benefits of smart contracts are
- Immutable - once deployed none can change them
- Composable - they’re public and anyone can interact with them, or build on top of them. Much like public APIs

## Resources

The following resources have been the most popular resources on the site for a long time. These are all highly recommend to start learning about Solidity


### 1. Official Solidity website
The most obvious resources is ofcourse the official website and documentation of the Solidity team itself. The Solidity team covers all the core concepts and fundamentals of Solidity and smart contracts in general. Highly recommended

https://soliditylang.org/


### 2. Solidity by Example
The second one on the list is Solidity by Example. A great collection of more pratical examples, incl. source code and supporting videos.

https://solidity-by-example.org/


### 3. CryptoZombies 
CryptoZombies is an interactive school that teaches you all things technical about blockchains. A fun and interactive way to write smart contracts in Solidity by making your own crypto-collectibles game.

https://cryptozombies.io/


### 4. Speedrun Ethereum

Speedrun Ethereum helps you get to the next level. It teaches you how to build on Ethereum; the superpowers and the gotchas while you build up your Web3 portfolio. If you like this, also make sure to check out the other work of the amazing [Austin Griffith](https://twitter.com/austingriffith) such as [ETH-build](https://eth.build/) and [Scaffold-eth](https://scaffoldeth.io/).

https://speedrunethereum.com/


### 5. Smart Contract Best Practices 

Smart contracts are complex instruments that have the authority to allocate high-value resources between complex systems. Often working autonomously. With huge financial loss at risk. This makes them critical components in these systems. Development of such components requires thoughtful design, solid engineering practices, rigorous testing and a strong security mindset. This document provides a baseline knowledge of security considerations.

https://consensys.github.io/smart-contract-best-practices/


## Other resources

If you'd like to read more, make sure to checkout all the other [Solidity](/tags/smart%20contracts) resources on the site.

Solidity is a programming language designed for developing smart contracts that run on Ethereum. It's the most in demand skill in the Web3 space. These are the best resources to help you learn more about it.

Best resources to learn Solidity


Web3 is about the next evolution of the web. A web that is more open, transparent and permissionless and runs on decentralized infrastructure such as blockchains. Global and decentralized applications (DApps) that anyone can interact with. They often have native assets integrated (such as Ether) to transact value, but are not just about money or payments. These decentralized applications offer a range of digitial services, such as storage, bandwidth and computation without any risk of downtime, censorship, fraud, or 3rd-party interference.

## Benefits

- **Open** - in that they are built from open-source software, by an open and accessible community of developers and executed in full view of the world. 
- **Trustless** - in that the network itself allows participants to interact publicly, or privately without a trusted third party
- **Permissionless** - in that anyone, both users and suppliers, can participate without authorisation from a governing body


## Opportunities

- Financial Tools (payments, fund raising, lending, borrowing,..)
- Identity solutions (self-sovereign, decentralized identifiers,..) 
- More secure voting and governance mechanisms
- Efficient resources management (CO2 tracking, smart grid’s,..)
- Digital ownership registries (e.g. land, collectibles, NFT’s,..)
- Supply chain tracking


## Web3 Development

[useWeb3](https://www.useweb3.xyz/) is a learning platform for developers to explore and learn about Web3. Whether you’re a new dev getting your hands dirty for the first time, or a seasoned developer making the transition into the Web3 space. 

Explore the latest resources, tutorials, challenges, tools, courses and boilerplates and start learning. Once you’re ready, browse the job board to land a job at some of the leading companies that work on core, open-source infrastructure, products, tools, frameworks, DAO's, etc.


## Further reading

- [A Cyberphunk's Manifesto](https://www.activism.net/cypherpunk/manifesto.html), Eric Hughes
- [The Meaning of Decentralization](https://medium.com/@VitalikButerin/the-meaning-of-decentralization-a0c92b76a274), Vitalik Buterin
- [Why decentralization matters](https://onezero.medium.com/why-decentralization-matters-5e3f79f7638e), Chris Dixon
- [What Is Web 3.0 & Why It Matters](https://medium.com/fabric-ventures/what-is-web-3-0-why-it-matters-934eb07f3d2b), Max Mersch and Richard Muirhead
- [What exactly is Web3?](https://youtu.be/l44z35vabvA), Juan Benet (VIDEO)


Web3 is about the next evolution of the web. A web that is more open, transparent and decentralized.

What is Web3


Create Eth App supports multiple frontend frameworks. It comes with a host of decentralized finance templates pre-filled with contract ABIs, addresses and subgraphs. Everything you need to build a modern Ethereum-powered single-page app.

- Learning how to write Ethereum-powered apps in a comfortable and feature-rich development environment.
- Starting new Ethereum-powered single-page React applications without wasting time on copy-pasting boilerplates
- Creating examples with React for your Ethereum-related libraries and components.

Create Ethereum-powered apps with one command

Create Eth App


Everything you need to build on Ethereum!

Quickly experiment with Solidity using a frontend that adapts to your smart contract

Forkable Ethereum dev stack focused on fast product iterations

Scaffold-ETH


Introduces great features:

- React hooks - Uses React hooks as your primary building ingredient
- Auto refresh - Refreshes on a new block, wallet change or network change
- Multicall - Combines multiple blockchain calls into a single multicall

Combines the best practices:
- Modern stack - Employs ethers.js, web3-react, multicall & waffle
- Extendability - Extends easily with custom hooks
- Testability - Simple integration tests for UI and blockchain

Framework for rapid Dapp development. Simple. Robust. Extendable. Testable

useDapp


Becoming a blockchain engineer is the most fun, rewarding, and exhilarating choice I’ve and my colleagues have ever made. And we’ve already blazed the trail for you to get started! In this article, we will show you exactly how to learn to become a blockchain engineer, from beginner to professional.

Spoiler alert, here is the exact blueprint we are going to cover to get you to a successful blockchain engineer:

1. Understand why you should become a blockchain engineer
2. Take a Blockchain Course
3. Join a Hackathon, the Community, & Build
4. Start your own protocol, Take a job, Freelance & Contribute

If you make it this far, you’ve done it! Although, I’ll add a bonus step 5 that we will talk about soon.

5. You’ve made it! Keep learning!

That’s it! These are the exact steps you need to take to become a blockchain engineer!

Become a blockchain, solidity, and smart contract engineer by following these steps

Become a Blockchain Engineer


Odds are you’ve heard about the Ethereum blockchain, whether or not you know what it is. It’s been in the news a lot lately, including the cover of some major magazines, but reading those articles can be like gibberish if you don’t have a foundation for what exactly Ethereum is. So what is it? In essence, a public database that keeps a permanent record of digital transactions. Importantly, this database doesn’t require any central authority to maintain and secure it. Instead it operates as a “trustless” transactional system — a framework in which individuals can make peer-to-peer transactions without needing to trust a third party OR one another.

Still confused? That’s where this post comes in. My aim is to explain how Ethereum functions at a technical level, without complex math or scary-looking formulas. Even if you’re not a programmer, I hope you’ll walk away with at least better grasp of the tech. If some parts are too technical and difficult to grok, that’s totally fine! There’s really no need to understand every little detail. I recommend just focusing on understanding things at a broad level.

Many of the topics covered in this post are a breakdown of the concepts discussed in the yellow paper. I’ve added my own explanations and diagrams to make understanding Ethereum easier. Those brave enough to take on the technical challenge can also read the Ethereum yellow paper.

Many of the topics covered in this post are a breakdown of the concepts discussed in the yellow paper. I’ve added my own explanations and diagrams to make it easier.

How does Ethereum work, anyway?


I recently joined Edge & Node as a Developer Relations Engineer and have been diving deeper into smart contract development with Ethereum. I have settled upon what I think is the best stack for building full stack dApps with Solidity:

▶︎ Client Framework - React
▶︎ Ethereum development environment - Hardhat
▶︎ Ethereum Web Client Library - Ethers.js
▶︎ API layer - The Graph Protocol

Building Full Stack dApps with React, Ethers.js, Solidity, and Hardhat

The Complete Guide to Full Stack Ethereum Development


Educational sandbox for building on web3. Visually understand how Ethereum works by doing.

ETH.Build


https://www.youtube.com/watch?v=gyMwXuJrbJQ

This course will give you a full introduction into all of the core concepts in blockchain, smart contracts, solidity, NFTs/ERC721s, ERC20s, Coding Decentralized Finance (DeFi), javascript and solidity, Chainlink, Ethereum, upgradable smart contracts, and full stack blockchain development.   

Some of the technologies covered are:
- The Graph
- Chainlink
- Metamask
- Alchemy
- Remix
- Hardhat
- Solidity
- Openzeppelin
- Trail of Bits
- Ganache
- Ethers
- Etherscan
- Coinmarketcap
- Aave
- IPFS
- Fleek.hq
- Filecoin
- NextJS
- Moralis
- Web3uikit
- Opensea
- Pinata
- Nft.storage

 And more!

Follow along with the videos and you'll be a blockchain wizard in no time!  💻 The repository with helpful links to all code, resources, and support forums is located here: https://github.com/smartcontractkit/full-blockchain-solidity-course-js.

This course will give you a full introduction into all of the core concepts related to blockchain, smart contracts, Solidity, ERC20s, full-stack Web3 dapps, decentralized finance (DeFi), JavaScript, TypeScript, Chainlink, Ethereum, upgradable smart contracts, DAOs, the graph, moralis, aave, IPFS, and more. Follow along with the videos and you'll be a blockchain wizard in no time!

Learn Blockchain, Solidity, and Full Stack Web3 Development with JavaScript – 32-Hour Course


Learning Solidity with a collection of YouTube videos and example code.

Learning Solidity


Here we collect and discuss the best DeFi & Blockchain researches and tools 

DeFi Developer roadmap


Nowadays there are countless well-made resources on how to learn blockchain development of all kinds and with different specializations in mind, however, it is still very hard to get guidance and personalized suggestions based on your interests. I am writing this guide in order to provide an aggregator of all the resources that I’ve found over the years, plus give some opinionated commentary on how to approach them and how to use them in order to maximize learning and practical understanding in order to get building cool things in the space as soon as possible.

This guide will focus on the Ethereum ecosystem as that’s where most developers and applications are. If you are interested in other ecosystems that are non-EVM compatible and are not L2s on Ethereum, then check out their respective documentation or guides written by their developer communities. Examples of other non-EVM compatible blockchains that are popular are Solana (Rust/Anchor), Polkadot (Rust/Substrate), Cosmos, Terra, and others. Most of these blockchains do or will support the EVM stack through various initiatives like Neon EVM (Solana), Moonbeam/Moonriver (Polkadot/Kusama), EVMOS (Cosmos), etc.

I really want this guide to become a community-sourced public good that everyone will be able to take advantage of. I will do my best to present it to the wider blockchain developer community to get constructive feedback, proofreading help, and insight into how to make it the best available guide available.

devpill.me


This document provides a baseline knowledge of security considerations for intermediate Solidity programmers. It is maintained by ConsenSys Diligence, with contributions from our friends in the broader Ethereum community.

A guide to Ethereum smart contract security best practices

Smart Contract Best Practices

**Describe the bug**
During testing of Embedded ChainSpecs I've noticed, that when providing invalid chainspec (empty, json invalid etc) Runner or Launcher will throw proper exception but user is unable just to close app using CTRL + C. Need to close entire cmd and type command again.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to chainspec location
2. Create new json file with just empty json chars {}
3. Open cmd on nethermind directory
4. Start Nethermind.Runner.exe with flag --Init.ChainSpecPath "path/to/new/json/spec"

**Expected behavior**
After exception thrown about empty chainspec, when user hits CTRL+C app should stop and user should be able to reuse a command after json fixes

**Desktop (please complete the following information):**
 - Windows 11, Nethermind from master branch


good first issue

low priority

Our flagship Ethereum client for Linux, Windows, and macOS—full and actively developed.

nethermind

[Chainspecs] When invalid chainspec provided using --Init.ChainSpecPath unable to close CMD using CTRL+C

**Is your feature request related to a problem? Please describe.**
This new version introduces some changes that we need to support

Some of the things that we need to support:
- [ ] New transaction version (version 1) for invoke and declare transactions
- [ ] Add a fee field to LogMessageToL2 event in the L1 Core Contract
- [ ] New fields in transaction trace: validate_invocation and fee_transfer_invocation
- [ ] Add nonce and version fields to invoke transactions
- [ ] Onchain data:
   - Remove the contract constructor arguments
   - Add the new nonce
   - See [here](https://github.com/starkware-libs/cairo-lang/blob/master/src/starkware/starknet/core/os/state.cairo)
- [ ] Update `starknet_call` and VM methods

enhancement

help wanted

core

juno

Been compatible with Starknet 0.10.0

I turned on my validator after the attestation slot had already passed and this was the duties log:
```
Attestation schedule attesterDutiesAtSlot=1 pubKeys=[0xb6bdb41f87ee] slot=3793913 slotInEpoch=25 timeTillDuty=-1m0s totalAttestersInEpoch=1
```
Notice `timeTillDuty=-1m0s` (there is a `-` at the beginning). We should probably skip the field in such cases.

Good First Issue

Priority: Low

Validator Client

Go implementation of Ethereum proof of stake

prysm

`timeTillDuty` log shows a negative number

This just removes two methods from `devp2p` so that should not be a super big problem.

effort: E1 hours

package: devp2p

Monorepo for the Ethereum VM TypeScript Implementation

ethereumjs-monorepo

TypeScript

Implement eth/67

We have a few places where we allocate a vector within the `FromStr` implementation for an element name/id when we don't really need to. 

Approach without allocation: data_model/src/trigger/mod.rs impl FromStr for Id.

iroha2

Optimization

Iroha - A simple, enterprise-grade decentralized ledger

iroha

Validate item names/ids without allocating `Vec`

### Component

Forge

### Describe the feature you would like

`forge test --json` currently includes raw logging information in its output, e.g:

```
        "logs": [
          {
            "address": "0x0000000000000000000000000000000000000000",
            "topics": [
              "0x41304facd9323d75b11bcdd609cb38effffdb05710f7caf0e9b16c6d9d709f50"
            ],
            "data": "0x000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000033132330000000000000000000000000000000000000000000000000000000000"
          }
        ],
```

It would be nice if it could also include the decoded/interpreted logs, as commands consuming this json are not likely to have the ability to decode these logs.

### Additional context

This is to support parsing test output information for inclusion in an editor plugin which allows forge tests to be run continuously when developing.

T-feature

Cmd-forge-test

C-forge

D-easy

Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.

foundry

Rust

Include decoded logs in `forge test --json`

There are some `snarkjs` call using shell execution ([e.g.](https://github.com/privacy-scaling-explorations/maci/blob/eb6a8114dac956281a7f5aa0e675a6d97ef06ca9/circuits/ts/index.ts#L90)). But it is error-prone to check execution result. 

[API call example](https://github.com/iden3/snarkjs/blob/master/test/fullprocess.js)

maci

Use `snarkjs` API call instead of CLI call

**Is your feature request related to a problem? Please describe.**
When we release a binary for GitHub or build on a tag, we should include that information on the binary before deploying it to GitHub releases.

**Describe the solution you'd like**
- Add deploy workflow for the node and embed GitHub tag on the build. 
- Check if the node is running on the latest version at the start of the execution.

**Describe alternatives you've considered**
- On the workflow build, embed the tag version into a var for this, like [this example](https://stackoverflow.com/a/55090713)
- Check if we are running the latest version of the node, against GitHub tags, one possible solution is using [this](https://github.com/tcnksm/go-latest)

**Additional context**
Versioning is important, at some point, breaking changes might appear from version to version, and users might need to know if they are running the latest version. 

Add build information on executable and Check for latest version

Couldn't find any references to this in the book.  Haven't had the time to ask on support and/or figure it out myself, but we will need to do this as we transition our deploy scripts to Foundry.

T-enhancement

A-forge

A book on all things Foundry, available at https://book.getfoundry.sh.

book

Solidity

document how to link external libraries on contract deployment

Here's the example: https://godbolt.org/z/Mbs9bd5nr

Similarly for `if (b == false)`  to `if(!b)`

annoys users :cry:

optimizer

Solidity, the Smart Contract Programming Language

solidity

Missing optimizer rules for `if (b == true)` to `if (b)`

Some work was done in https://github.com/foundry-rs/book/pull/564 but we shouldn't link to Github PRs/issues in the book, the documentation should exist in the book itself.

Explain gas report ignores

## Description

It seems a robust parser for Accept headers has finally emerged. We have rudimentary Accept header parsing but it's incorrect in case of quoted commas. For more context see: https://github.com/sigp/lighthouse/pull/3185#discussion_r875285613.

In the fullness of time we should delete our `.split(',')` implementation in favour of the `MediaTypeList` implementation: https://docs.rs/mediatype/latest/mediatype/struct.MediaTypeList.html

## Version

Lighthouse v3.0.0


code-quality

t API

lighthouse

Try new robust Accept header parser

## Abstract
Currently, when running [command-line tests](https://github.com/ethereum/solidity/tree/develop/test/cmdlineTests), the working directory is set to `test/cmdlineTests/` and not the directory of the specific test case. This means that we need to repeat the name of the test case (which is often long) to refer to a file inside it.

This is not a big problem as long as we rely on the test runner inserting the file path automatically. There are, however, cases where we do have to spell out the path. For example:
https://github.com/ethereum/solidity/blob/f802eafc679541cc1d3ba0ca5bc7c12b4bdaf939/test/cmdlineTests/standard_debug_info_in_yul_and_evm_asm_print_all/input.json#L3-L5

We should be able to do `"C": {"urls": ["in.sol"]}` instead.

## Specification
Adjust [`cmdlineTests.sh`](https://github.com/ethereum/solidity/blob/develop/test/cmdlineTests.sh) so that it enters test case dir before running it and exits it afterwards. Then remove any hard-coded test case names from test inputs and regenerate expectations.

testing :hammer:

low effort

low impact

nice to have

Switch working dir to test dir in command-line tests

### Describe the issue:

In solidity, it is possible to specify the name of the returned variable from the function as well as its value type. The presence of this feature cancels the need to both declare the variable in the function body as well as having a return statement. However, if the developer mistakenly declares the variable in the function body again, the newly declared variable will not shadow the previously declared variable in the function declaration statement. This leads to the function returning the default initial value for the named return variable instead of the intended value that is computed in the function body since it pertains to another variable only with the same name. The current solidity compiler (0.8.15) does not raise an error, and only shows a warning: `Warning: This declaration shadows an existing declaration for the declaration of the variable in the function body.`
 This is not correct since the declared variable in the function declaration statement will shadow the variable in the function body, not the other way around. This shadowing is not detected by Slither. In the accompanied code the `max` variable in the getMax function is shadowed by the default value max is initialized within the named return statement in the function declaration.

### Code example to reproduce the issue:
```
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <=0.9.0;

library ArrayUtils {
    function getMax(uint[] calldata a) public pure returns (uint max) {
        uint max = 0;
        uint max_index = 0;
        for (uint i = 0; i < a.length; i++) {
            if (a[i] >= max) {
                max_index = i;
                max = a[i];
            }
        }
    }

    function range(uint l) internal pure returns (uint[] memory r) {
        r = new uint[](l);      
        for (uint i = 0; i < l; i++) {
            r[i] = i;
        }
    }
}


contract ArraysUser {
    using ArrayUtils for *;

    function getMax(uint l) public pure returns (uint max) {
        max = ArrayUtils.range(l).getMax();
    }
}
```

### Version:

0.8.3


### Relevant log output:

_No response_

new detector

slither

Python

[Bug-Candidate]: Function-local (memory) variable shadowing not detected by Slither

See https://github.com/foundry-rs/foundry/pull/2854

A-reference

T-new

Document `parse*` cheatcodes

### Component

Forge

### Describe the feature you would like

The `recordLogs/getRecordedLogs` functions would be more useful if `Log` had an `address emitter` field. Unless I'm missing something, as of now the feature doesn't let me fully implement #1906.

### Additional context

_No response_

A-cheatcodes

P-low

Remember address of log emitters in `Log` (used in `getRecordedLogs`)

![Juno Screenshot](https://user-images.githubusercontent.com/23554017/186194982-b2b6b28c-f9e3-40c9-b0cb-aed75b5d7bc6.jpg)

Make the following improvements to the user interface (see screenshot above).

- [ ] Include the RPC listening address in the log e.g. `http://localhost:8080/rpc`.
- [x] The log timestamps should show the user's local time as an ISO8601 formatted string (see the Go standard library's `time.RFC3339` constant) instead of UTC time. Addressed in #387. 
- [ ] Omit file names and line numbers.
- [ ] Relegate state diff collection and block synchronisation logs to `DEBUG`. The most important piece of information is probably the "Updated block info" which should stay at `INFO`.

User interface improvements

[`FunctionCallGraph`](https://github.com/ethereum/solidity/blob/develop/libsolidity/analysis/FunctionCallGraph.h) is currently [covered with boost tests](https://github.com/ethereum/solidity/blob/develop/test/libsolidity/analysis/FunctionCallGraph.cpp). These tests are generally harder to maintain and update than our soltest-style tests.

We should define a custom test case class for them and put expectations in annotations. See [`StackLayoutGeneratorTest`](https://github.com/ethereum/solidity/blob/develop/test/libyul/StackLayoutGeneratorTest.h) and [`test/libyul/yulStackLayout/`](https://github.com/ethereum/solidity/tree/develop/test/libyul/yulStackLayout) for an example of such a custom test suite and test cases based on it.

### Example
We should be able to replace the following test case:
https://github.com/ethereum/solidity/blob/a3de6cd60e4277051a1cc0f8eb8f1516e6c0ec57/test/libsolidity/analysis/FunctionCallGraph.cpp#L253-L292

with a `.sol` file that looks like this:
```solidity
function free() {}

library L {
    function ext() external {}
    function pub() public {}
    function inr() internal {}
    function prv() private {}
}

contract C {
    function ext() external {}
    function pub() public {}
    function inr() internal {}
    function prv() private {}
}
// ----
// CREATION
//     contract C
//     library L
// DEPLOYED
//     contract C
//         Entry -> function C.ext()
//         Entry -> function C.pub()
//     library L
//         Entry -> function L.ext()
//         Entry -> function L.pub()
```

medium effort

Rewrite `FunctionCallGraph` tests as soltest test suite

Some more verifiers have been added such as Sourcify and Blockscout, the command references should reflect this

Document verifiers

Hello, i would like to use this package with preinstalled metamask and other extensions. (using userDataDir arg from pupeteer, so extensions would be saved there)
I noticed that i cannot install any extension on the browser via UI (i use chrome, install via chrome web store or crx). 
The Error i get when trying to install is "Installation is disabled". 
![image](https://user-images.githubusercontent.com/11799176/185748739-15a7ea8c-69c7-441a-9fe2-80ff1f751024.png)

these are my launch parameters
`{
        metamaskVersion: 'v10.15.0',
        userDataDir: './browser_data2',
        headless: false,
        product: "chrome",
        args: [
            '--ignore-certificate-errors',
            '--lang=en-US,en;q=0.9',
        ],
        executablePath : "C:/Program Files (x86)/Google/Chrome/Application/chrome.exe",
        defaultViewport: null,
        slowMo: 25,
        ignoreDefaultArgs: [
            "--disable-extensions",
            "--enable-automation"
        ],
}`
I was able to load saved extensions like this with pupeteer (without this package)
How can i load my extension without reinstalling it every launch? 

Thanks in advance

🏌🏼‍E2E testing for dApps using Puppeteer + MetaMask

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