
## BuildBear Features: 

### Mainnet State 

Create a Testnet that is forked from a range of Ethereum-compatible chains, including Ethereum, Polygon, Arbitrum, Optimism, Fantom, and Binance, at any block number.

### Explorer
Experience seamless exploration and easy debugging of your transactions on your Testnet with BuildBear's built-in explorer and in-built transaction tracer.

### Faucet
Minting native and popular ERC20 Tokens like USDC, DAI, USDT, BNB, BUSD, MATIC, WBTC, UNI, and AAVE  has never been easier. With BuildBear's user-friendly faucet, you can mint tokens with just one click.

### Unlock Advanced Customization

Run your standard testing and other scripts against BuildBear Testnets RPC with

- Impersonate Account: Pretend to be another wallet that existed before your Testnet creation. This feature is particularly helpful for testing the effects of transactions in situations such as DAO voting, LP pool withdrawals, and more.

- Deploy Contracts Beyond 24KB: Work on larger contracts without worrying about the contract size limit.

- Mining Window: Set the mining interval between blocks to replicate a real blockchain environment.

- Snapshot: Take a snapshot of the blockchain environment's state and execute transactions in the respective snapshot.


Your private Testnet (forked from Mainnet), your own Explorer, Faucet and RPC

BuildBear

Curated list of Faucets for Public Testnets

Faucets for Public Testnets


An updated version of the EVM reference page at ethervm.io

A quick reference for EVM opcodes

Crypto Glossary: Cryptocurrencies and Blockchain.

a16z crypto glossary


A curated list of cryptography resources and links.

Awesome cryptography


A curated list of awesome of the Foundry development framework. 

Awesome Foundry


A curated list of awesome Solidity resources, libraries, tools and more

Awesome Solidity


A curated list of awesome StarkNet resources, libraries, tools and more

Awesome StarkNet


The history of software development spans decades. We benefit from the best practices, design patterns, and nuggets of wisdom that has accumulated over half a century.

In contrast, smart contract development is just getting started. Ethereum and Solidity launched in 2015, only a handful of years ago.

The crypto space is an ever-growing uncharted territory. There’s no definitive stack of tools to build decentralized apps. There are no developer handbooks like Design Patterns or Clean Code for smart contracts. Information about tools and best practices are scattered all over the place.

You’re reading the missing guide I wish existed. It summarizes the lessons I’ve learned from writing smart contracts, building decentralized applications, and open source projects in the Ethereum ecosystem.

This guide summarizes the lessons I’ve learned from writing smart contracts, building decentralized applications, and open source projects in the Ethereum ecosystem.

Best Practices for Smart Contract Development


The ultimate web3 product design resource. Our platform curates the best web3 product and design examples. Learn from tried and tested web3 products, discover solutions, and design better user flows.

Curating the best design examples and journeys from leading web3 products.

BestInWeb3


Step by step guide to becoming a blockchain developer.

Blockchain developer roadmap


The Buidl Guidl is a curated group of Ethereum builders creating products, prototypes, and tutorials with scaffold-eth.

Buidl Guidl


First setup using Nile which makes managing files and command line calls to StarkNet simple.
Second have a look at how pytest works
After you have set everything up, to run the examples:
- Open two terminals in the project folder and run source env/bin/activate
- In one run nile node to start a local devnet.
- In the other run the commands in the examples.

Examples of different elements in Cairo and StarkNet.
- Hello, World!
- First application
- Array
- Data types
- Variables
- Read and write values
- Read and write tuples
- Currency
- Constructor
- Custom imports
- Contract calls
- Array argument
- Array returns
- Struct returns


Cairo is a programming language that can be used to write blockchain applications. The language is novel in that it converts program logic into STARK proofs.

Cairo by example


Search, upload, download, deploy, manage, and integrate any Solidity smart contract into your app. We support any workflow. You can download source code, or deploy with our UI, it's up to you!

Use Cookbook to find smart contracts, solidity libraries, and web3 resources

Cookbook - an open source smart contract marketplace


Our mission is to empower individuals through crypto and we believe the first step is through understanding the mechanics and utility of this revolutionary asset class.

Cryptopedia is a platform designed to facilitate that understanding by providing free, high-quality crypto education to the world. It is also a platform that crypto experts can leverage to deliver a deeper level of understanding about specific crypto projects and initiatives to the public. When exploring Cryptopedia we hope you acquire the knowledge that you seek and find inspiration in the ingenious technology and limitless possibility of crypto.

Cryptopedia


If you could learn about anything in this space, what would it be? Whether you're interested in NFTs, crypto, the blockchain, or Web3 as a whole - no topic is off limits for our incredible experts.

Ask any web3 question – get an answer within 24h.

curious.xyz


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


Dissecting DeFi Protocols analyzes smart contracts of different DeFi protocols.

My newsletter explains how DeFi protocols work as smart contracts

Dissecting DeFi Protocols


EIP.Fun aims to serve as the "layer 2" of the EIP ecosystem, simplifying and accelerating the adoption of EIPs, and seeking to catalyze the synergy of the EIP ecosystem.


Everything new about Ethereum improvements proposals.

EIP.fun


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

ETH.Build


ETH Gas Tracker helps you discover how gas works, why it matters and help you set optimal gas fees to use the Ethereum network more efficiently. Get real-time gas prices, historical data, and average fees to time your transactions and save money. Ethereum Gas Tracker is the best way to track gas prices and provides an API for developers to integrate gas data into their applications.

Monitor and track the Ethereum, and L2 gas prices to reduce transaction fees and save money

ETH Gas Tracker


Ethereum Cat Herders is a group of individuals, working together to support the Ethereum core developers with project management and other aspects of communication and coordination. Our aim is to bring the minimum amount of order that chaos needs to move Ethereum forward.

Decentralized project management to support the Ethereum Network.

Ethereum Cat Herders


A guide to available tools and platforms for developing on Ethereum.

Ethereum Developer Tools List


Unofficial Ecosystem page for Ethereum and its Layer 2s featuring 900+ dApps and tools across [Optimism](https://www.ethereum-ecosystem.com/blockchains/optimism), [Base](https://www.ethereum-ecosystem.com/blockchains/base), [Starknet](https://www.ethereum-ecosystem.com/blockchains/starknet) and more.

### Features: 
- Built-in search engine to easily find the right dApp
- Advanced filters and sorting
- Mobile-friendly
- Generous Faucets for Ethereum, Optimism and Base Sepolia


Discover the best of Ethereum and its layer 2s. All in one place.

Ethereum Ecosystem


ethereum.org is here to help you build with Ethereum with documentation on foundational concepts as well as the development stack. Plus there are tutorials to get you up and running.

Inspired by the Mozilla Developer Network, we thought Ethereum needed a place to house great developer content and resources. Like our friends at Mozilla, everything here is open-source and ready for you to extend and improve.

A builders manual for Ethereum. By builders, for builders.

Ethereum.org Developer portal


For users of Ethereum, the decentralized application platform and smart contract enabled blockchain

Ethereum StackExchange

EthFiddle


evm.codes is brought to you by Comity Labs, powered by open-source projects such as EthereumJS, SolcJS and many others.

An interactive reference to  Ethereum Virtual Machine Opcodes

EVM Codes

A curated list of EVM resources for aspiring shadowy super coders.

The EVM Handbook


Evmtools is a toolkit for web3 and evm chains. Provide tools for development of smart contracts, zero knowledge proofs, and cryptography. Extension also available [here](https://chromewebstore.google.com/detail/evm-tools/aibinghcdfagfoaajjiojfhkmnjmjmem)


EVM Tools


We're a community of like-minded individuals passionate about decentralized apps and the Ethereum network. We aim to create an inclusive and helpful environment where content creators can share their experiences and resources to reach their goals.

Are you new to the world of blockchain? No problem! Our FREE resources will make it easy for you to get started with building decentralized apps and interacting with the Ethereum network. Whether you're a beginner or a seasoned pro, we've got you covered!

Free Web3 resources


Connect with the community developing digital public goods, creating financial freedom, and defining the future of the open web.

Gitcoin


Growthepie provides comprehensive and accurate analytics on Ethereum scaling solutions, acting as a trusted data aggregator from reliable sources such as L2Beat and DefiLlama, while also developing their own metrics.


Mastering Ethereum Layer 2s - Your Gateway to Curated Analytics and Knowledge.

Growthepie

Kiwi is a decentralized version of HackerNews, focusing exclusively on crypto tech, products, and culture. Kiwi's community of crypto veterans shares, upvotes, and discusses top crypto essays, news, art, GitHub repos, and Dune Dashboards.

Kiwi News


lil web3 aims to build really simple, intentionally-limited versions of web3 protocols & apps. By distilling them to their roots, we can better understand how they work.

- lil ENS
- lil OpenSea
- lil Fractional
- lil JuiceBox
- lil Flash Loan
- lil Gnosis
- lil Superfluid


Simple, intentionally-limited versions of web3 protocols & apps.

lil web3


This repository contains examples of common Ethereum smart contract vulnerabilities, including code from real smart contracts. Use Not So Smart Contracts to learn about EVM and Solidity vulnerabilities, as a reference when performing security reviews, and as a benchmark for security and analysis tools.

(Not So) Smart Contracts

Web-based smart contract tool with examples.

OpenZeppelin Solidity Wizard


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


Building an EVM from scratch https://karmacoma.notion.site/Building-an-EVM-from-scratch-series-90ee3c827b314e0599e705a1152eecf9 

An extensible Python implementation of the Ethereum yellow paper from scratch.

smol-evm


an introduction to Solidity with simple examples

Solidity by Example


This document contains a collection of design and programming patterns for the smart contract programming language Solidity in version 0.4.20. Note that newer versions might have changed some of the functionalities. Each pattern consists of a code sample and a detailed explanation, including background, implications and additional information about the patterns.

A compilation of patterns and best practices for the smart contract programming language Solidity

Solidity Patterns


Detailed tutorials about how to create web3 apps. From the smart contracts to the front-end and deployments.

Articles, step-by-step guides, and tips about Solidity, Web3 and Smart Contracts.

Solidity Tips


A great set of tools allowing all devs to dive deep into smart contracts (either for learning or prod-level debugging), simulate both individual transactions and complex scenarios with real-time on-chain data, monitor any entity and create full-fledged serverless DeFi solutions. Oh, and it's all available in the free plan :)


Simulate, debug and monitor anything on EVM-compatible chains

Tenderly


The Sway Book introduces the Sway language to smart contract developers. It covers how to write, test, and deploy smart contracts for the Fuel Network using Sway and the Sway toolchain.


An introduction to the Sway programming language.

The Sway Book


This is my exhaustive personal opinions, brain dump, examples, guide, curated resources on web2/3 development.

No matter you're complete newbie to even web2 or web2/3 dev with some experience, hope you'll find this doc helpful to get comfortable with web3 development.


A very exhaustive third brain (personal opinions, examples, guide, curated resources) on web2/3 development / security

thirdbrain


These bite-sized guides are written in approachable terms so engineers of all skill levels can understand them. Every guide comes with a concise, self-contained, working code example and tests to demonstrate the pattern. New patterns are added weekly.

This repo is an ongoing collection of useful, and occasionally clever, solidity/EVM patterns that actually get used in the wild. 

useful-solidity-patterns


an introduction to Vyper with simple examples

Vyper by Example


Web3 is an idea for a new iteration of the World Wide Web based on blockchain technology, which incorporates concepts including decentralization and token-based economics.

Web3 by Example is a hands-on introduction to web3 development using annotated example programs. 

Web3 by Example is a hands-on introduction to web3 development using annotated example programs.

Web3 by Example


Inspiration, insights & opportunities by the best people in web3. Stories, use cases, insider info, tutorial, guides, job offers & more.

Inspiration, insights & opportunities by the best people in web3.

Web3 creators


The starter pack is split into 4 crypto concepts (web3, DAOs, NFTs & DeFi).

Web3 starter pack


zk block is one stop app for zero knowledge proofs, smart contracts, ethereum (& L2), web3 apps and cryptography.


Web3 Websites

🌐 DeFi Developer roadmap

🌐 ETH Gas Tracker

🌐 Smart Contract Best Practices

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