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<a href="https://readmedium.com/how-to-test-ethereum-smart-contracts-for-access-restriction-9dff445400d0">
<div>
<div>
<h2>How to Test Ethereum Smart Contracts for Access Restriction</h2>
<div><h3>Write Solidity tests to ensure access to functions is correctly restricted</h3></div>
<div><p>medium.com</p></div>
</div>
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<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*U9Z_-y5PxXKiwmi7xNupnQ.jpeg)"></div>
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</a>
</div><div id="9670" class="link-block">
<a href="https://medium.com/better-programming/how-to-make-a-pok%C3%A9mon-like-game-with-erc-721-tokens-704f2344626">
<div>
<div>
<h2>How to Make a Pokémon-Like Game With ERC-721 Tokens</h2>
<div><h3>ERC-721 tokens: What they are? How do they work? How can we use them?</h3></div>
<div><p>medium.com</p></div>
</div>
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<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*VE5vGk1jJiRbs_eA12KsRg.jpeg)"></div>
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</a>
</div><div id="64a1" class="link-block">
<a href="https://readmedium.com/how-to-generate-random-numbers-on-ethereum-using-vrf-8250839dd9e2">
<div>
<div>
<h2>How to Generate Random Numbers on Ethereum Using VRF</h2>
<div><h3>How Chainlink Solved Ethereum’s “Random Problem”</h3></div>
<div><p>medium.com</p></div>
</div>
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<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*Cbo5mXlVBtF1q0267ROPaQ.jpeg)"></div>
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</a>
</div><div id="b060" class="link-block">
<a href="https://readmedium.com/build-a-verifiably-random-lottery-smart-contract-on-ethereum-c1daacc1ca4e">
<div>
<div>
<h2>Build a Verifiably Random Lottery Smart Contract on Ethereum</h2>
<div><h3>How to create an Ethereum lottery</h3></div>
<div><p>medium.com</p></div>
</div>
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<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*ApApJllf65Em_KUtIEhEEw.jpeg)"></div>
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</a>
</div><div id="bce7" class="link-block">
<a href="https://readmedium.com/how-to-retrieve-price-data-in-smart-contracts-9e0467dfd280">
<div>
<div>
<h2>How to Retrieve Price Data in Smart Contracts</h2>
<div><h3>Get crypto prices in a single function call</h3></div>
<div><p>medium.com</p></div>
</div>
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<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*VCjJyxzcK6j_YjuXFqWPMA.jpeg)"></div>
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</a>
</div><div id="92fc" class="link-block">
<a href="https://readmedium.com/how-to-call-apis-from-ethereum-smart-contracts-e2f1500198c7">
<div>
<div>
<h2>How to Call APIs From Ethereum Smart Contracts</h2>
<div><h3>Find and use oracles to retrieve off-chain data in your smart contracts</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*s2Zkbf1r33ZL5AxW_fF-oA.jpeg)"></div>
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</a>
</div><h2 id="a521">Tips</h2><div id="e0ec" class="link-block">
<a href="https://readmedium.com/solidity-cheat-sheet-e63036cca083">
<div>
<div>
<h2>Solidity Cheat Sheet</h2>
<div><h3>Ethereum Smart Contracts for dummies</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*z1O9LF_4ydtBcuWyn1yvng.jpeg)"></div>
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</a>
</div><div id="5633" class="link-block">
<a href="https://readmedium.com/smart-contracts-dont-reinvent-the-wheel-63cee4370d19">
<div>
<div>
<h2>Smart Contracts: Don’t Reinvent the Wheel</h2>
<div><h3>Always use OpenZeppelin</h3></div>
<div><p>medium.com</p></div>
</div>
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<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*4G_wNGRDJvj25hQmbo7r0w.jpeg)"></div>
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</a>
</div><div id="aa94" class="link-block">
<a href="https://readmedium.com/15-tips-to-write-better-smart-contracts-abba3e94ddf2">
<div>
<div>
<h2>15 Tips to Write Better Smart Contracts</h2>
<div><h3>Start by defining the purpose and end by making sure it works</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*75FbnguPLUrHrruR8Ee3JQ.jpeg)"></div>
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</a>
</div><h1 id="f97c">3. Ethereum DApps</h1><h2 id="6250">Tutorials</h2><div id="4392" class="link-block">
<a href="https://readmedium.com/the-top-5-web3-javascript-functions-for-ethereum-dapps-7bc108bfd37">
<div>
<div>
<h2>The Top 5 Web3 JavaScript Functions for Ethereum DApps</h2>
<div><h3>getAccounts, sendTransaction, estimateGas, and more</h3></div>
<div><p>medium.com</p></div>
</div>
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<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/0*jldz3o40zYbFa7WV)"></div>
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</a>
</div><div id="d795" class="link-block">
<a href="https://readmedium.com/i-created-a-truffle-box-with-react-redux-and-bootstrap-4-7f382f75483d">
<div>
<div>
<h2>I Created a Truffle Box With React, Redux, and Bootstrap 4</h2>
<div><h3>How to automate tedious setup tasks to focus solely on functionality</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*fMydxlx5wsBWi8CVW5sqYQ.png)"></div>
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</a>
</div><div id="d3be" class="link-block">
<a href="https://readmedium.com/ethereum-dapps-how-to-load-the-blockchain-8756ca0fa0d1">
<div>
<div>
<h2>Ethereum DApps: How to Load the Blockchain</h2>
<div><h3>Practices for good user experiences using Truffle, React, Redux, Web3, and Metamask</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*-RrbWQH-R72evjrWr_LDFQ.png)"></div>
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</a>
</div><div id="3d7b" class="link-block">
<a href="https://readmedium.com/ethereum-dapps-how-to-listen-for-events-c4fa1a67cf81">
<div>
<div>
<h2>Ethereum DApps: How to Listen for Events</h2>
<div><h3>3 steps to subscribe to smart-contract events</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*rgzwy0ekWl2mQ2i03uOSlw.jpeg)"></div>
</div>
</div>
</a>
</div><div id="73ce" class="link-block">
<a href="https://readmedium.com/how-to-build-a-dapp-portfolio-without-spending-a-penny-42d7d0b63d8f">
<div>
<div>
<h2>How to Build a DApp Portfolio Without Spending a Penny</h2>
<div><h3>Use testnets and free web services to deploy Ethereum DApps for free</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*JPpOOBqQODcqnbheD8CmaQ.jpeg)"></div>
</div>
</div>
</a>
</div><div id="c119" class="link-block">
<a href="https://readmedium.com/enable-your-dapp-users-to-log-in-using-facebook-and-google-c33f6d504358">
<div>
<div>
<h2>Enable Your DApp Users to Log in Using Facebook and Google</h2>
<div><h3>Using Torus to connect to common social networks</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*maurjo94aWjtzeoMZKkncA.jpeg)"></div>
</div>
</div>
</a>
</div><div id="7c80" class="link-block">
<a href="https://readmedium.com/enable-your-dapp-users-to-log-in-using-their-email-address-or-phone-number-c6d3b03a5b62">
<div>
<div>
<h2>Enable Your DApp Users to Log In Using Their Email Address or Phone Number</h2>
<div><h3>Using Fortmatic to connect users to your DApp</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*IjtDnXI6vP4u4GpqYxMPTQ.jpeg)"></div>
</div>
</div>
</a>
</div><div id="e1c3" class="link-block">
<a href="https://readmedium.com/you-can-now-buy-crypto-inside-dapps-heres-how-30002cb0d8d6">
<div>
<div>
<h2>You Can Now Buy Crypto Inside DApps, Here’s How</h2>
<div><h3>Buying crypto has never been so easy</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*WYwppbajXS03z0Z1k2vDZQ.jpeg)"></div>
</div>
</div>
</a>
</div><div id="cd18" class="link-block">
<a href="https://readmedium.com/what-are-truffle-scripts-and-how-can-we-use-them-88185acd86dd">
<div>
<div>
<h2>What Are Truffle Scripts and How Can We Use Them?</h2>
<div><h3>A powerful tool that can be used to seed your local blockchain environments</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*ohRnf8u6WIttSucTzbE8Sw.jpeg)">
Options
</div>
</div>
</div>
</a>
</div><div id="6886" class="link-block">
<a href="https://readmedium.com/how-to-create-a-dapp-with-blockchain-lego-f4becf10f4d6">
<div>
<div>
<h2>How to Create a DApp With Blockchain Lego</h2>
<div><h3>The story of how I created a Defi application without spending a penny</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*TuxGvHQmigjE8kmwcodFFg.jpeg)"></div>
</div>
</div>
</a>
</div><div id="9732" class="link-block">
<a href="https://readmedium.com/how-to-supply-assets-to-defi-protocols-using-javascript-df6c6d31e58d">
<div>
<div>
<h2>How to Supply Assets to DeFi Protocols Using JavaScript</h2>
<div><h3>Build your app to interact with Compound Finance</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*K_B9fk4OLex0SizoDAUC3w.jpeg)"></div>
</div>
</div>
</a>
</div><div id="1aca" class="link-block">
<a href="https://readmedium.com/how-to-supply-assets-to-the-aave-protocol-programmatically-acfb0875a2f0">
<div>
<div>
<h2>How to Supply Assets to the AAVE Protocol Programmatically</h2>
<div><h3>Earn interest using the AAVE protocol: a JavaScript tutorial</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*FlkKaoyx_Lb8zlyqMrvNmA.png)"></div>
</div>
</div>
</a>
</div><div id="033b" class="link-block">
<a href="https://readmedium.com/youtubers-to-subscribe-to-for-blockchain-development-931c3c8e5f96">
<div>
<div>
<h2>YouTubers To Subscribe To For Blockchain Development</h2>
<div><h3>The best Blockchain Development creators to learn from</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*vBDHsV1H9kmKbSf_9pFNrw.jpeg)"></div>
</div>
</div>
</a>
</div><h2 id="1a28">Tips</h2><div id="56a8" class="link-block">
<a href="https://readmedium.com/getting-started-with-web3-js-70a75bda857">
<div>
<div>
<h2>Getting Started With Web3 JS</h2>
<div><h3>An overview of the most useful and commonly used functions</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*tSsnevrp7uk0OePWLUICIw.jpeg)"></div>
</div>
</div>
</a>
</div><div id="457a" class="link-block">
<a href="https://readmedium.com/dapp-ux-changing-accounts-7d3187b58627">
<div>
<div>
<h2>DApp User Experience: Changing Accounts</h2>
<div><h3>Improving the user experience of your DApp by listening for “accountsChanged”</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*n73J6jzcFWabWH8rcUa7dQ.gif)"></div>
</div>
</div>
</a>
</div><div id="a570" class="link-block">
<a href="https://readmedium.com/how-to-structure-react-redux-applications-53906565a61b">
<div>
<div>
<h2>How To Structure React Redux Applications</h2>
<div><h3>Keep your code in check</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*CPGVDRng2xLTJSzC5J7cpQ.jpeg)"></div>
</div>
</div>
</a>
</div><div id="b58c" class="link-block">
<a href="https://readmedium.com/ethereum-dapp-portfolio-ideas-21e1aac6dc52">
<div>
<div>
<h2>Ethereum DApp Portfolio Ideas</h2>
<div><h3>A curated list of Ethereum DApp project ideas to show the world you’re a Blockchain Developer</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*_cP9Q_njuryKmaI8XcC2xg.jpeg)"></div>
</div>
</div>
</a>
</div><h1 id="5b0e">4. Ethereum Ecosystem</h1><div id="a0d1" class="link-block">
<a href="https://readmedium.com/this-is-how-chainlink-oracles-work-on-ethereum-5e463d4cf429">
<div>
<div>
<h2>This Is How Chainlink Oracles Work on Ethereum</h2>
<div><h3>Calling web APIs from Ethereum smart contracts using Chainlink Oracles</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*SABnYfT-DtAuwGOgkqs79g.jpeg)"></div>
</div>
</div>
</a>
</div><div id="bef5" class="link-block">
<a href="https://readmedium.com/proposing-future-ethereum-access-control-72e56e14e68e">
<div>
<div>
<h2>Proposing Future Ethereum Access Control</h2>
<div><h3>Dissecting current standards and proposing possible solutions for fully dynamic access control management in smart…</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*l05_KIL40_5tcPcHcvVyNg.jpeg)"></div>
</div>
</div>
</a>
</div><div id="b971" class="link-block">
<a href="https://courses.blockgeeks.com/?ref=637">
<div>
<div>
<h2>Blockchain Courses, Training and Education — Blockgeeks.com</h2>
<div><h3>Demand for blockchain professionals is exploding. With Blockgeeks, you’ll work with Bitcoin, Ethereum and many more…</h3></div>
<div><p>courses.blockgeeks.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/0*fl4leKZ7KkSFlhaw)"></div>
</div>
</div>
</a>
</div><div id="640c" class="link-block">
<a href="https://readmedium.com/ethereum-testnets-what-are-they-and-why-so-many-ebf62821bbc">
<div>
<div>
<h2>Ethereum Testnets: What Are They and Why So Many?</h2>
<div><h3>Kovan, Rinkeby, Sokol, Görli & Ropsten</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*tfuw_LVaJxZPbkS1wG3p6g.jpeg)"></div>
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</div>
</a>
</div><div id="d176" class="link-block">
<a href="https://readmedium.com/how-spankchain-got-hacked-af65b933393c">
<div>
<div>
<h2>How Spankchain Got Hacked</h2>
<div><h3>Explained: A Reentrancy attack which drained 165 Ether</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*Hv2oT7EVFm-J70TI7WAUEg.jpeg)"></div>
</div>
</div>
</a>
</div><div id="5c10" class="link-block">
<a href="https://readmedium.com/lets-make-an-ethereum-simulation-game-8ac8c20b892b">
<div>
<div>
<h2>Let’s Make An Ethereum Simulation Game</h2>
<div><h3>Part 1: Inception</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*au7mQsXR-hSdUTtS0hHTpw.jpeg)"></div>
</div>
</div>
</a>
</div><div id="3949" class="link-block">
<a href="https://readmedium.com/what-is-defi-ed061ecbe947">
<div>
<div>
<h2>What Is DeFi?</h2>
<div><h3>What is it and why should I care about it?</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*yl4lXQpJ4r6A8vFPK27Z4w.jpeg)"></div>
</div>
</div>
</a>
</div><div id="2a18" class="link-block">
<a href="https://readmedium.com/how-to-be-part-of-the-blockchain-revolution-ef678eeb5a15">
<div>
<div>
<h2>How to Be Part of the Blockchain Revolution</h2>
<div><h3>The most significant paradigm shift in modern society is coming</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*Jl_aeMcuFE8C-zUycBlxrQ.jpeg)"></div>
</div>
</div>
</a>
</div><div id="a6d9" class="link-block">
<a href="https://readmedium.com/ethereum-smart-contract-ponzi-schemes-9e43015b56f8">
<div>
<div>
<h2>Ethereum Smart Contract Ponzi Schemes</h2>
<div><h3>A New Frontier For The Notorious Pyramid Scheme</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*SopKuNrFgWhqXfrqXRlW6g.jpeg)"></div>
</div>
</div>
</a>
</div><h1 id="6cd6">5. Other Blockchains</h1><div id="6460" class="link-block">
<a href="https://readmedium.com/introduction-to-hyperledger-fabric-for-ethereum-developers-7eb92318021f">
<div>
<div>
<h2>An Introduction to Hyperledger Fabric for Ethereum Developers</h2>
<div><h3>How to write your first Hyperldger Chaincode smart contract</h3></div>
<div><p>medium.com</p></div>
</div>
<div>
<div style="background-image: url(https://miro.readmedium.com/v2/resize:fit:320/1*3hdPHh81PA_7EXLN6KPRhg.jpeg)"></div>
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