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Q1 2023 Web3 Development Report revealed! Get all the alpha and insights 🚀 Products APIs Chains Alchemy SDK Tools Supernode The web3 engine Transact Send txns 7.9x faster NFT API Build any NFT app Transaction Simulation Transactation previews for any use case Webhooks Real-time data for specific events Account Abstraction Smart contract wallet APIs Custom Webhooks Real-time data for custom events Spearmint Free and automated allowlists Websockets Blockchain connection for ongoing data Transfers API Complete transaction history in one call Token API Token balances and metadata Ethereum The decentralized L1 Solana Powerful, efficient transactions Polygon PoS Low fees, high throughput Astar Connecting Polkadot to all L1s Polygon zkEVM Scalable security Request a Chain Request a chain we don't currently support Starknet Performance built on ZK-Rollups Arbitrum Instant L1 interoperability Optimism Ultra fast, EVM-compatible Query blockchain data with two lines of code Built on ethers.js to give you all ethers functionality, plus access to all of Alchemy's Enhanced APIs 10x faster development cycles with Alchemy Infrastructure Create Web3 Dapp Bootstrap a dapp in 4 minutes Composer In-browser request sandbox Account Monitoring Tools include reporting, alerts, analytics, and application monitoring. Transaction Monitoring Monitor transactions with request explorer, request sandbox, mempool visualizer. 7,800 Annual Eng Hours Saved with Alchemy Use Cases Case Studies Verticals Enterprise Zapper 30% cost savings with Alchemy Decentral Games 1k NFTs sold out in under 2 min Collab.land 3.5M+ wallets integrated Royal 33% of Polygon capacity in drop View all case studies FEATURED CASE STUDY Read case study NFT Supporting all major NFT platforms DeFi Powering the majority of DeFi $400k saved in engineering investment Step into web3 with enterprise infrastructure Build and grow in web3 at scale, with the only web3 developer platform powering the largest businesses in the world Powering $33B in OpenSea sales Company About us Careers Customers Ventures Newsroom Newsletter Events Blog Join the best team in web3 See careers Developers Get started Documentation Alchemy API Overview SDK Quickstart NFT API Quickstart Deploy First Smart Contract Guides Alchemy University Alchemy Quickstart Guide Web3 Tutorials Overview Overviews YouTube Resources Discord Status Faucets Dapp Store Discover Pricing Sign in Sign up Sign in Sign up Network Launch Date Consensus Note Sepolia Oct 2021 PoW Like-for-like representation of Ethereum Görli Jan 2019 PoA Proof-of-Authority Kiln Mar 2022 PoS Post-Merge (for ETH2), shadow fork of the mainnet Kintsugi Dec 2021 PoS DEPRECATED, use Kiln; post-Merge (for ETH2) Ropsten Nov 2016 PoW DEPRECATED, use Sepolia; the Merge to happen on Jun 8, 2022 Rinkeby Apr 2017 PoA DEPRECATED, use Görli and Görli Faucet Kovan Mar 2017 PoA DEPRECATED, use Sepolia or Görli List of active and deprecated Ethereum testnets, including Kintsugi. Features Optimistic rollup ZK-rollup Proof Uses fraud proofs to prove transaction validity. Uses validity (zero-knowledge) proofs to prove transaction validity. Capital efficiency Requires waiting through a 1-week delay (dispute period) before withdrawing funds. Users can withdraw funds immediately because validity proofs provide incontrovertible evidence of the authenticity of off-chain transactions. Data compression Publishes full transaction data as calldata to Ethereum Mainnet, which increases rollup costs. Doesn't need to publish transaction data on Ethereum because ZK-SNARKs and ZK-STARKs already guarantee the accuracy of the rollup state. EVM compatibility Uses a simulation of the Ethereum Virtual Machine (EVM), which allows it to run arbitrary logic and support smart contracts. Doesn't widely support EVM computation, although a few EVM-compatible ZK-rollups have appeared. Rollup costs Reduces costs since it publishes minimal data on Ethereum and doesn't have to post proofs for transactions, except in special circumstances. Faces higher overhead from costs involved in generating and verifying proofs for every transaction block. ZK proofs require specialized, expensive hardware to create and have high on-chain verification costs. Trust assumptions Doesn't require a trusted setup. Requires a trusted setup to work. Liveness requirements Verifiers are needed to keep tabs on the actual rollup state and the one referenced in the state root to detect fraud. Users don't need someone to watch the L2 chain to detect fraud. Security properties Relies on cryptoeconomic incentives to assure users of rollup security. Relies on cryptographic guarantees for security. Start building on Alchemy. Sign up for free Start building on Optimism. Sign up for free Start building on Arbitrum. Sign up for free Start building on Ethereum. Sign up for free Start building on Polygon. Sign up for free Start building on Starknet. Sign up for free Start building on Flow. Sign up for free kiln faucet Get free Kiln ETH. Start building today SEPOLIA FAUCET Get free Sepolia ETH. Start Building Today mumbai faucet Get free Mumbai Matic. Start building today rinkeby faucet Get free Rinkeby ETH. Start building today Start building on Ethereum. Get started for free Start building on Ethereum. Get started for free Start building on Flow. Get started for free Start building on Polygon. Get started for free Start building on Starknet. Get started for free Start building on Optimism. Get started for free Start building on Solana. Get started for free Start building on Solana. Sign up for beta access Start building on Solana. Join the waitlist Start building on Arbitrum. Get started for free Learn Solidity at Alchemy University Get started today curl https://release.solana.com/v1.10.32/solana-install-init-x86_64-pc-windows-msvc.exe --output C:\solana-install-tmp\solana-install-init.exe --create-dirs 🥳 Introducing the Alchemy Dapp Store, web3's free and community-supported directory Products Use Cases Developers Company Product suite Supernode Supercharged web3 API NFT API Build all NFT functionality with ease SDK Plug Alchemy into your app Notify Add notifications to your app Enhanced APIs New functionality for your app Monitor Crucial dashboards and alerts Build Tools for prototyping & debugging Amplify Magnify your product launch chains Ethereum The default web3 blockchain The Merge Polygon Easy Ethereum scaling Solana NEW Powerful and fast for everyone Arbitrum Scale without compromise Optimism New scalability stack Astar NEW Connecting Polkadot to all L1s Starknet Security with ZK-Rollups Flow The blockchain for open worlds Crypto.org Next generation public blockchain case studies 0x $1 billion in transactions Polygon Polygon’s 95x app growth Zapper 30% cost savings with Alchemy Decentral Games 1k NFTs sold out in under 2 min Zerion 7,800 annual eng hours saved Element.fi 10x faster dev cycles Collab.land 3.5M+ wallets integrated Royal 33% of Polygon capacity in single drop View all case studies featured use cases NFT Supporting all major NFT platforms DeFi Powering the majority of DeFi Documentation Get Started Developer HubAlchemy API OverviewSDK QuickstartNFT API Quickstart Learn Alchemy UniversityAlchemy Quickstart GuideDeploy First Smart ContractCreate an NFT Minter Chain Docs EthereumPolygonSolanaArbitrum Chain Docs FlowOptimismCrypto.org Resources Guides Goerli Faucet Status Roadmap Blog About Newsroom Careers Newsletter Get in touch Events Ventures Pricing We're hiring Sign In product suite supernode nft api sdk notify enhanced apis monitor build amplify chains ethereum polygon solana arbitrum optimism astar starknet flow crypto.org case studies 0x polygon zapper decentral games zerion element.fi Royal featured use cases nft defi View all case studies Documentation Get Started Developer HubAlchemy API OverviewSDK QuickstartNFT API Quickstart Resources Learn Alchemy UniversityAlchemy Quickstart GuideDeploy First Smart ContractCreate an NFT Minter Chain Docs EthereumPolygonSolanaArbitrumOptimismCrypto.org Guides Goerli Faucet Status Roadmap Blog About Newsroom Careers Newsletter Get in touch Events Ventures View pricing Get started for free 🎉 Solana is here. Start building on Solana with Alchemy today. For the first 500 developers, all usage is free through 2022. Product suite Supernode Build Monitor Notify Enhanced APis Amplify NFT API chains Ethereum CRYPTO.org CHAIN Flow Arbitrum Optimism polygon Starknet solana Featured Use Cases NFTs defi CAse studies 0x Polygon All case studies company About us Faq newsroom Ventures careers customers roadmap events BLOG Pricing Docs Ethereum Crypto.com Flow polygon Arbitrum optimism Connect Wallet Login Products Product Suite Supernode Supercharged Ethereum API Build Tools for prototyping & debugging Monitor Crucial dashboards and alerts Notify Add notifications to your app Enhanced Apis New functionality for your app Amplify Magnify your product launch NFT API New Build your NFT app with ease chains Ethereum The default blockchain The Merge → crypto.org Next generation public blockchain New beta Flow The blockchain for open worlds New beta New New arbitrum Scale without compromise Optimism New scalability stack Polygon Easy Ethereum scaling beta Starknet Security with ZK-Rollups beta Astar Connecting Polkadot to all L1s beta More chains coming soon Solana Powerful and fast for everyone beta featured use cases More chains coming soon NFTs Non-fungible tokens DeFi Decentralized finance SDK Plug Alchemy into your app Pricing case studies Success stories 0x $1 billion in transactions Polygon Polygon's 95x app growth zerion 7,800 annual eng hours saved zapper 30% cost savings with Alchemy Decentral games 99.99% uptime element.fi 10x faster development cycles collab.land 3.5M+ wallets integrated all case studies company About us FAQ newsroom Ventures careers customers Roadmap Events developer grants BlogDocs Docs ETHEREUM cronos Flow Polygon arbitrum Optimism Solana We're hiring This is some text inside of a div block. CONNECT WALLET we're hiring Login Testnets RINKEBY OVERVIEW A COMPLETE GUIDE TO ETHEREUM'S RINKEBY TESTNET What is Rinkeby, Why to Use it, and How to Get Started Last Updated: October 25, 2022 Table of Contents What is the Rinkeby testnet? How big is the Rinkeby testnet? Why do developers use Rinkeby over other testnets? How to get Rinkeby testnet ETH How to Send Rinkeby Testnet ETH What are the best Rinkeby testnet tools? Start Building Using Rinkeby Today Table of Contents What is the Rinkeby testnet? How big is the Rinkeby testnet? Why do developers use Rinkeby over other testnets? How to get Rinkeby testnet ETH How to Send Rinkeby Testnet ETH What are the best Rinkeby testnet tools? Start Building Using Rinkeby Today Table of Contents What is the Rinkeby testnet? How big is the Rinkeby testnet? Why do developers use Rinkeby over other testnets? How to get Rinkeby testnet ETH How to Send Rinkeby Testnet ETH What are the best Rinkeby testnet tools? Start Building Using Rinkeby Today Goerli faucet Get free Goerli ETH. Start building today THE RINKEBY TESTNET IS DEPRECATED The Rinkeby testnet was deprecated by the Ethereum Foundation on October 5th, 2022. On October 5th, 2022, Alchemy's Rinkeby faucet was deprecated. The Rinkeby testnet will be read-only for the foreseeable future, and will be sunset in Summer 2023. We recommend you migrate your contracts from Rinkeby and deploy new ones on Goerli, and use Alchemy's Goerli Faucet to get free testnet ETH. WHAT IS THE RINKEBY TESTNET? The Rinkeby testnet is an Ethereum testnet that developers use to test decentralized applications before deploying them to the Ethereum mainnet. The network is a fork of the Ethereum mainnet that is run by pre-authorized nodes, which prevents spam attacks and increases performance. Developers can use a Rinkeby Faucet to get free testnet ETH and test their smart contracts without the risk of losing real financial assets. Because it’s a testnet, the currency is worthless. You can’t mine ETH within the Rinkeby testnet, only request it. Authorized nodes can only create new blocks, meaning no other nodes can be awarded mining rewards. The Rinkeby testnet currently supports the following node clients: Geth, Besu, Nethermind, and OpenEthereum. This article will explain the Rinkeby testnet, its main uses, the Proof-of-Authority (PoA) consensus mechanism, how to get Rinkeby testnet ETH from a Rinkeby faucet, how to send testnet ETH to other wallets, and the best Rinkeby testnet tools to help accelerate your journey developing dApps. WHEN DID RINKEBY LAUNCH? The Ethereum team launched the Rinkeby testnet in 2017 using a modified proof of authority consensus model, and will be deprecated in favor of using the Goerli testnet, another popular testnet that uses the proof of authority consensus mechanism. Rinkeby uses proof of authority (PoA), which is a modified form of Proof of Stake (PoS). Instead of staking with something that has monetary value, a validator’s identity performs the staking to provide high performance while also giving fault tolerance. The PoA consensus protocol is now maintained by the Geth team. HOW BIG IS THE RINKEBY TESTNET? There are currently about 11,000,000 blocks on the network and as of 2021, Rinkeby had about 50 million transactions. There are 46 active nodes in the Rinkeby testnet, and the block time for the Rinkeby testnet is about 15 seconds. The max limit a block can be filled up with transactions is about 41,000. The Block gas limit for the Rinkeby testnet is about 30 million gas. The gas limit refers to the max price a cryptocurrency pays when sending a transaction, or performing a smart contract function in the Ethereum blockchain. Fees are calculated in gas units, and the gas limit defines the maximum value that the transaction or function can "charge" or take from the user. With the gas price at about 1,000 gwei and 0.1 h/s average network hash rate, it’s able to provide 100% uptime with 30-80 ms page latency. For the most up-to-date stats, check out the Rinkeby statistics page. WHY DO DEVELOPERS USE RINKEBY OVER OTHER TESTNETS? Many developers prefer Rinkeby because it’s more centralized compared to to PoW testnets like Ropsten that can be easily spammed. Using PoA enhances security overall in comparison to PoW. Developers also choose Rinkeby over other testnets due to its faster block time. Ropsten has a block time of about 30 seconds, but Rinkeby cuts that time in half. The chain data size for Rinkeby is only about 6GB. That means if you wanted to run an Ethereum node for Rinkeby, it wouldn’t require a large amount of data size compared to other testnets. Overall, Rinkeby is often known to be more reliable and faster than other testnets. WHAT ARE SOME DISADVANTAGES TO USING RINKEBY? One disadvantage to using Rinkeby is that its proof of authority blockchain consensus model doesn’t fully simulate the production environment. This is different from the Ropsten testnet where miners on the network have a financial incentive to maintain the testnet itself. The Ropsten testnet also uses a PoW consensus mechanism, which makes it identical to the current Ethereum consensus mechanism which also uses Proof of Work. Unlike the Kovan testnet, Rinkeby’s testnet supports Geth software and not Parity. HOW DO DEVELOPERS USE THE RINKEBY TESTNET? The main use case for using the Rinkeby testnet is for developers to test their applications in a controlled testing environment that functions like Mainnet Ethereum without taking the financial risk to execute smart contracts, iterate application features, and perform functionality. Rinkeby is famously used by well-known companies such as OpenSea, Manifold Studios, and Rarible. They deploy their marketplaces on Rinkeby and Rarible to deploy their NFT marketplaces on Rinkeby before deploying on mainnet. Developers also use the testnet as an educational tool. Often, developers make several mistakes along their journey. Using a testnet enables them to enhance their understanding of how to use the main network better in the future. Finally, developers use Rinkeby to test upgrades to the underlying platforms. This is essential to create better developer tools for the Web3 ecosystem and to create more libraries, better documentation, and essential feedback overall. All these use cases relate to creating a safe space for developers to thrive. Without testnets like Rinkeby, developers would bear the consequences of potentially losing real-world assets, and they would have to be more careful interacting with their smart contracts. HOW TO GET RINKEBY TESTNET ETH You can easily receive testnet ETH through a testnet faucet. Testnet faucets exist so developers can request funds and continue testing applications without real financial risk. Alchemy’s Rinkeby faucet is one of the most used and reliable faucets up to date. Here is how to make a test account for a Rinkeby faucet: STEP 1: SIGN UP This is very important. Sign up for a free Alchemy account to get five times as many testnet Ether tokens as you would without an Alchemy account. STEP 2: CHANGE YOUR NETWORK IN METAMASK Open Metamask and click the network name located at the top right of the window. STEP 3: ADD THE RINKEBY TEST NETWORK Click the Add Network button at the bottom of the pop-up window. STEP 4: ENTER THE RINKEBY TEST NETWORK DETAILS Feel free to select the Rinkeby Test Network already provided from Metamask by default. If you signed up for a free Alchemy account, you will be able to get your new RPC URL from the dashboard after creating a new app with the Rinkeby Testnet. This will give you more features and abilities provided by Alchemy as your new RPC URL node provider. * Network Name: Rinkeby Testnet * New RPC URL: https://eth-rinkeby.alchemyapi.io/v2/your-api-key * Chain ID: 4 * Currency Symbol: ETH * Block Explorer URL: https://rinkeby.etherscan.io/ STEP 5: GET FREE RINKEBY ETH To request funds, enter your wallet address and hit “Send Me ETH”. Remember, if you log in with Alchemy, you’ll receive 5x the amount of ETH for free. Note: We support wallets as received addresses but not smart contracts. There you have it, you now instantly have testnet ETH in your Metamask wallet. As always, please try it out and share this with developers building on the Rinkeby testnet that need fake ETH tokens. If you have any feedback, feel free to let us know in Discord! HOW TO SEND RINKEBY TESTNET ETH Sending testnet ETH works the same as it does on the Ethereum Mainnet. Once you’ve connected to the Rinkeby testnet network and received testnet ETH, follow these steps: STEP 1: SELECT "SEND" ON THE RINKEBY TEST NETWORK Select the send button within your Metamask wallet. Make sure you are connected to the Rinkeby Test Network, and then click the send button to send test ETH to another Rinkeby account. STEP 2: PASTE THE RECIPIENTS RINKEBY ADDRESS From here, paste in the address of the wallet that will receive your testnet ETH. In this example, we’ll use our Test Account 2 wallet address to send 0.01 ETH. ‍ STEP 3. CONFIRM THE TRANSACTION TO SEND RINKEBY ETH Click confirm to send your transaction. Be aware that there are still gas fees within testnets (which have no real value). ‍ That’s it! As you can see, our Test Account 2 wallet now has received 0.01 Rinkeby testnet ETH. WHAT ARE THE BEST RINKEBY TESTNET TOOLS? Rinkeby works best with other blockchain developer tools to ensure you have a great experience creating decentralized apps using a modern web3 tech stack. Web3 developers should consider the depth and breadth of developer tooling that is available. POPULAR WEB3 LIBRARIES Two of the most used Web3 native libraries include ethers.js and web3.js. These libraries natively support remote procedure calls (RPC) to blockchain nodes hosted on the blockchain interaction layer. This enables more seamless integration into a developer’s Web3 tech stack and reading and writing data to the blockchain. Alchemy has another Web3 library. The alchemy-web3.js library is a drop-in replacement for web3.js and is built and configured to work seamlessly with Alchemy and provide multiple advantages, such as automatic retries and robust WebSocket support. POPULAR WEB3 DEVELOPMENT ENVIRONMENTS Fortunately, EVM-compatible chains benefit from years of Ethereum development and have a host of battle-hardened options when it comes to development environments. Hardhat, Truffle, and Brownie are all great options when it comes to development environments in Web3. These developer environments allow developers to compile, test, deploy, and debug Ethereum software and testnets like Rinkeby. In addition, they come with more tooling and easily customizable local blockchain development environments. When it comes to decentralized storage, IPFS, Filebase, and Arweave serve as great options. Decentralized storage fills in the gap for expensive and inefficient frontend content like images, videos, and GIFs. ALCHEMY TOOLS Development platforms like Alchemy provide a large suite of tools for testing and finding bugs: Supernode, Build, Monitor, and Notify makes this whole process much more convenient. Alchemy’s Rinkeby development platform and dashboard help developers easily configure their needs in building Web3 decentralized applications. Alchemy’s JSON Composer helps developers create, fix, and share Ethereum requests, making the engineering process much faster. Finally, Rinkeby’s etherscan is useful to view transactions belonging to any public Ethereum address. START BUILDING TODAY As web3 grows from its current state to maturity, there will surely be paradigm shifts, new web3 infrastructure tools, and plenty to learn. Using testnets is an essential step to developing in web3 before deploying to Ethereum mainnet. With the Rinkeby testnet deprecated, developers can build while having the security, speed, and scalability alongside additional tools on the Goerli test network. Join a growing movement of developers—both Web3 natives and fellow travelers from Web2— and together we can build the future! Related Overviews Testnets TOP SEPOLIA RPC PROVIDERS AND PUBLIC ENDPOINTS (2023) Last Updated: March 3, 2023 Explore the top dedicated Sepolia RPC node providers including Alchemy and public Sepolia RPC endpoints like sepolia.org. read more Testnets Testnets HOW TO ADD SEPOLIA TO METAMASK Last Updated: March 22, 2023 Learn how to add Sepolia to your MetaMask wallet with a free and dedicated Sepolia RPC endpoint from Alchemy! read more Testnets Testnets GOERLI VS. SEPOLIA TESTNET COMPARISON: WHICH IS BETTER? Last Updated: March 26, 2023 Determine which testnet is right for your needs by comparing the technical differences, benefits, and tradeoffs between the Sepolia and Goerli testnets. read more Testnets ALCHEMY SUPERNODE - ETHEREUM NODE API SCALE TO ANY SIZE, WITHOUT ANY ERRORS Alchemy Supernode finally makes it possible to scale blockchain applications without all the headaches. Plus, our legendary support will guide you every step of the way. Get started for free THE WEB3 DEVELOPER PLATFORM Supercharge your inbox Sign up for our developer newsletter: Thank you! Your submission has been received! Your email has been sumitted! Products Supernode Build Monitor Notify Amplify NFT API Developers Sign Up Login API Documentation Newsletter Status Rinkeby Faucet Goerli Faucet Kiln Faucet Mumbai Faucet Overviews Gwei Calculator Company Enterprise About Us Customers Newsroom Careers Blog Press Kit Terms of Service Contact General Inquiries Press Sales Discord Email © 2022 Alchemy Insights, Inc The web3 development platform Supercharge your inbox Sign up for our developer newsletter: Thank you! Your submission has been received! Oops! Something went wrong while submitting the form. Products SupernodeNFT APISDKWebhooksCustom WebhooksWebsocketsTransfers APIToken APITransactTransaction SimulationAccount AbstractionSpearmint Developers LoginSign UpDocsStatusSepolia FaucetGoerli FaucetMumbai FaucetGwei CalculatorCreate Web3 DappSmart Contract Repository Community TutorialsGuidesCode SnippetsAlchemy UniversityWeb3 JobsDapp StoreOverviewsCase StudiesWAGBI ProgramNewsletterBlogForum Company About UsCareersCustomersEnterpriseNewsroomPress KitSecurityTerms of ServiceDapp Store Terms of UsePrivacy Policy Contact SalesPressEmailDiscord © 2023 Alchemy Insights, Inc Powered by Alchemy Testnets RINKEBY OVERVIEW A COMPLETE GUIDE TO ETHEREUM'S RINKEBY TESTNET What is Rinkeby, Why to Use it, and How to Get Started Last Updated: October 25, 2022 Share https://www.alchemy.com/overviews/rinkeby-testnet Don't miss an update Sign up for our newsletter to get alpha, key insights, and killer resources. Thank you! Your submission has been received! Oops! Something went wrong while submitting the form. Table of Contents Text Link Text Link Text Link Text Link What is the Rinkeby testnet? How big is the Rinkeby testnet? Why do developers use Rinkeby over other testnets? How to get Rinkeby testnet ETH How to Send Rinkeby Testnet ETH What are the best Rinkeby testnet tools? Start Building Using Rinkeby Today Table of Contents What is the Rinkeby testnet? How big is the Rinkeby testnet? Why do developers use Rinkeby over other testnets? How to get Rinkeby testnet ETH How to Send Rinkeby Testnet ETH What are the best Rinkeby testnet tools? Start Building Using Rinkeby Today Table of Contents The Rinkeby Testnet is Deprecated What is the Rinkeby testnet? When did Rinkeby launch? How big is the Rinkeby testnet? Why do developers use Rinkeby over other testnets? What are some disadvantages to using Rinkeby? How do developers use the Rinkeby testnet? How to get Rinkeby testnet ETH Step 1: Sign up Step 2: Change your Network in Metamask Step 3: Add the Rinkeby Test Network Step 4: Enter the Rinkeby Test Network Details Step 5: Get Free Rinkeby ETH How to Send Rinkeby Testnet ETH Step 1: Select "Send" on the Rinkeby Test Network Step 2: Paste the Recipients Rinkeby Address Step 3. Confirm the Transaction to Send Rinkeby ETH What are the best Rinkeby testnet tools? Popular Web3 Libraries Popular Web3 Development Environments Alchemy Tools Start Building Today Goerli faucet Get free Goerli ETH. Start building today THE RINKEBY TESTNET IS DEPRECATED The Rinkeby testnet was deprecated by the Ethereum Foundation on October 5th, 2022. On October 5th, 2022, Alchemy's Rinkeby faucet was deprecated. The Rinkeby testnet will be read-only for the foreseeable future, and will be sunset in Summer 2023. We recommend you migrate your contracts from Rinkeby and deploy new ones on Goerli, and use Alchemy's Goerli Faucet to get free testnet ETH. WHAT IS THE RINKEBY TESTNET? The Rinkeby testnet is an Ethereum testnet that developers use to test decentralized applications before deploying them to the Ethereum mainnet. The network is a fork of the Ethereum mainnet that is run by pre-authorized nodes, which prevents spam attacks and increases performance. Developers can use a Rinkeby Faucet to get free testnet ETH and test their smart contracts without the risk of losing real financial assets. Because it’s a testnet, the currency is worthless. You can’t mine ETH within the Rinkeby testnet, only request it. Authorized nodes can only create new blocks, meaning no other nodes can be awarded mining rewards. The Rinkeby testnet currently supports the following node clients: Geth, Besu, Nethermind, and OpenEthereum. This article will explain the Rinkeby testnet, its main uses, the Proof-of-Authority (PoA) consensus mechanism, how to get Rinkeby testnet ETH from a Rinkeby faucet, how to send testnet ETH to other wallets, and the best Rinkeby testnet tools to help accelerate your journey developing dApps. WHEN DID RINKEBY LAUNCH? The Ethereum team launched the Rinkeby testnet in 2017 using a modified proof of authority consensus model, and will be deprecated in favor of using the Goerli testnet, another popular testnet that uses the proof of authority consensus mechanism. Rinkeby uses proof of authority (PoA), which is a modified form of Proof of Stake (PoS). Instead of staking with something that has monetary value, a validator’s identity performs the staking to provide high performance while also giving fault tolerance. The PoA consensus protocol is now maintained by the Geth team. HOW BIG IS THE RINKEBY TESTNET? There are currently about 11,000,000 blocks on the network and as of 2021, Rinkeby had about 50 million transactions. There are 46 active nodes in the Rinkeby testnet, and the block time for the Rinkeby testnet is about 15 seconds. The max limit a block can be filled up with transactions is about 41,000. The Block gas limit for the Rinkeby testnet is about 30 million gas. The gas limit refers to the max price a cryptocurrency pays when sending a transaction, or performing a smart contract function in the Ethereum blockchain. Fees are calculated in gas units, and the gas limit defines the maximum value that the transaction or function can "charge" or take from the user. With the gas price at about 1,000 gwei and 0.1 h/s average network hash rate, it’s able to provide 100% uptime with 30-80 ms page latency. For the most up-to-date stats, check out the Rinkeby statistics page. WHY DO DEVELOPERS USE RINKEBY OVER OTHER TESTNETS? Many developers prefer Rinkeby because it’s more centralized compared to to PoW testnets like Ropsten that can be easily spammed. Using PoA enhances security overall in comparison to PoW. Developers also choose Rinkeby over other testnets due to its faster block time. Ropsten has a block time of about 30 seconds, but Rinkeby cuts that time in half. The chain data size for Rinkeby is only about 6GB. That means if you wanted to run an Ethereum node for Rinkeby, it wouldn’t require a large amount of data size compared to other testnets. Overall, Rinkeby is often known to be more reliable and faster than other testnets. WHAT ARE SOME DISADVANTAGES TO USING RINKEBY? One disadvantage to using Rinkeby is that its proof of authority blockchain consensus model doesn’t fully simulate the production environment. This is different from the Ropsten testnet where miners on the network have a financial incentive to maintain the testnet itself. The Ropsten testnet also uses a PoW consensus mechanism, which makes it identical to the current Ethereum consensus mechanism which also uses Proof of Work. Unlike the Kovan testnet, Rinkeby’s testnet supports Geth software and not Parity. HOW DO DEVELOPERS USE THE RINKEBY TESTNET? The main use case for using the Rinkeby testnet is for developers to test their applications in a controlled testing environment that functions like Mainnet Ethereum without taking the financial risk to execute smart contracts, iterate application features, and perform functionality. Rinkeby is famously used by well-known companies such as OpenSea, Manifold Studios, and Rarible. They deploy their marketplaces on Rinkeby and Rarible to deploy their NFT marketplaces on Rinkeby before deploying on mainnet. Developers also use the testnet as an educational tool. Often, developers make several mistakes along their journey. Using a testnet enables them to enhance their understanding of how to use the main network better in the future. Finally, developers use Rinkeby to test upgrades to the underlying platforms. This is essential to create better developer tools for the Web3 ecosystem and to create more libraries, better documentation, and essential feedback overall. All these use cases relate to creating a safe space for developers to thrive. Without testnets like Rinkeby, developers would bear the consequences of potentially losing real-world assets, and they would have to be more careful interacting with their smart contracts. HOW TO GET RINKEBY TESTNET ETH You can easily receive testnet ETH through a testnet faucet. Testnet faucets exist so developers can request funds and continue testing applications without real financial risk. Alchemy’s Rinkeby faucet is one of the most used and reliable faucets up to date. Here is how to make a test account for a Rinkeby faucet: STEP 1: SIGN UP This is very important. Sign up for a free Alchemy account to get five times as many testnet Ether tokens as you would without an Alchemy account. STEP 2: CHANGE YOUR NETWORK IN METAMASK Open Metamask and click the network name located at the top right of the window. STEP 3: ADD THE RINKEBY TEST NETWORK Click the Add Network button at the bottom of the pop-up window. STEP 4: ENTER THE RINKEBY TEST NETWORK DETAILS Feel free to select the Rinkeby Test Network already provided from Metamask by default. If you signed up for a free Alchemy account, you will be able to get your new RPC URL from the dashboard after creating a new app with the Rinkeby Testnet. This will give you more features and abilities provided by Alchemy as your new RPC URL node provider. * Network Name: Rinkeby Testnet * New RPC URL: https://eth-rinkeby.alchemyapi.io/v2/your-api-key * Chain ID: 4 * Currency Symbol: ETH * Block Explorer URL: https://rinkeby.etherscan.io/ STEP 5: GET FREE RINKEBY ETH To request funds, enter your wallet address and hit “Send Me ETH”. Remember, if you log in with Alchemy, you’ll receive 5x the amount of ETH for free. Note: We support wallets as received addresses but not smart contracts. There you have it, you now instantly have testnet ETH in your Metamask wallet. As always, please try it out and share this with developers building on the Rinkeby testnet that need fake ETH tokens. If you have any feedback, feel free to let us know in Discord! HOW TO SEND RINKEBY TESTNET ETH Sending testnet ETH works the same as it does on the Ethereum Mainnet. Once you’ve connected to the Rinkeby testnet network and received testnet ETH, follow these steps: STEP 1: SELECT "SEND" ON THE RINKEBY TEST NETWORK Select the send button within your Metamask wallet. Make sure you are connected to the Rinkeby Test Network, and then click the send button to send test ETH to another Rinkeby account. STEP 2: PASTE THE RECIPIENTS RINKEBY ADDRESS From here, paste in the address of the wallet that will receive your testnet ETH. In this example, we’ll use our Test Account 2 wallet address to send 0.01 ETH. ‍ STEP 3. CONFIRM THE TRANSACTION TO SEND RINKEBY ETH Click confirm to send your transaction. Be aware that there are still gas fees within testnets (which have no real value). ‍ That’s it! As you can see, our Test Account 2 wallet now has received 0.01 Rinkeby testnet ETH. WHAT ARE THE BEST RINKEBY TESTNET TOOLS? Rinkeby works best with other blockchain developer tools to ensure you have a great experience creating decentralized apps using a modern web3 tech stack. Web3 developers should consider the depth and breadth of developer tooling that is available. POPULAR WEB3 LIBRARIES Two of the most used Web3 native libraries include ethers.js and web3.js. These libraries natively support remote procedure calls (RPC) to blockchain nodes hosted on the blockchain interaction layer. This enables more seamless integration into a developer’s Web3 tech stack and reading and writing data to the blockchain. Alchemy has another Web3 library. The alchemy-web3.js library is a drop-in replacement for web3.js and is built and configured to work seamlessly with Alchemy and provide multiple advantages, such as automatic retries and robust WebSocket support. POPULAR WEB3 DEVELOPMENT ENVIRONMENTS Fortunately, EVM-compatible chains benefit from years of Ethereum development and have a host of battle-hardened options when it comes to development environments. Hardhat, Truffle, and Brownie are all great options when it comes to development environments in Web3. These developer environments allow developers to compile, test, deploy, and debug Ethereum software and testnets like Rinkeby. In addition, they come with more tooling and easily customizable local blockchain development environments. When it comes to decentralized storage, IPFS, Filebase, and Arweave serve as great options. Decentralized storage fills in the gap for expensive and inefficient frontend content like images, videos, and GIFs. ALCHEMY TOOLS Development platforms like Alchemy provide a large suite of tools for testing and finding bugs: Supernode, Build, Monitor, and Notify makes this whole process much more convenient. Alchemy’s Rinkeby development platform and dashboard help developers easily configure their needs in building Web3 decentralized applications. Alchemy’s JSON Composer helps developers create, fix, and share Ethereum requests, making the engineering process much faster. Finally, Rinkeby’s etherscan is useful to view transactions belonging to any public Ethereum address. START BUILDING TODAY As web3 grows from its current state to maturity, there will surely be paradigm shifts, new web3 infrastructure tools, and plenty to learn. Using testnets is an essential step to developing in web3 before deploying to Ethereum mainnet. With the Rinkeby testnet deprecated, developers can build while having the security, speed, and scalability alongside additional tools on the Goerli test network. Join a growing movement of developers—both Web3 natives and fellow travelers from Web2— and together we can build the future! THE RINKEBY TESTNET IS DEPRECATED The Rinkeby testnet was deprecated by the Ethereum Foundation on October 5th, 2022. On October 5th, 2022, Alchemy's Rinkeby faucet was deprecated. The Rinkeby testnet will be read-only for the foreseeable future, and will be sunset in Summer 2023. We recommend you migrate your contracts from Rinkeby and deploy new ones on Goerli, and use Alchemy's Goerli Faucet to get free testnet ETH. WHAT IS THE RINKEBY TESTNET? The Rinkeby testnet is an Ethereum testnet that developers use to test decentralized applications before deploying them to the Ethereum mainnet. The network is a fork of the Ethereum mainnet that is run by pre-authorized nodes, which prevents spam attacks and increases performance. Developers can use a Rinkeby Faucet to get free testnet ETH and test their smart contracts without the risk of losing real financial assets. Because it’s a testnet, the currency is worthless. You can’t mine ETH within the Rinkeby testnet, only request it. Authorized nodes can only create new blocks, meaning no other nodes can be awarded mining rewards. The Rinkeby testnet currently supports the following node clients: Geth, Besu, Nethermind, and OpenEthereum. This article will explain the Rinkeby testnet, its main uses, the Proof-of-Authority (PoA) consensus mechanism, how to get Rinkeby testnet ETH from a Rinkeby faucet, how to send testnet ETH to other wallets, and the best Rinkeby testnet tools to help accelerate your journey developing dApps. WHEN DID RINKEBY LAUNCH? The Ethereum team launched the Rinkeby testnet in 2017 using a modified proof of authority consensus model, and will be deprecated in favor of using the Goerli testnet, another popular testnet that uses the proof of authority consensus mechanism. Rinkeby uses proof of authority (PoA), which is a modified form of Proof of Stake (PoS). Instead of staking with something that has monetary value, a validator’s identity performs the staking to provide high performance while also giving fault tolerance. The PoA consensus protocol is now maintained by the Geth team. HOW BIG IS THE RINKEBY TESTNET? There are currently about 11,000,000 blocks on the network and as of 2021, Rinkeby had about 50 million transactions. There are 46 active nodes in the Rinkeby testnet, and the block time for the Rinkeby testnet is about 15 seconds. The max limit a block can be filled up with transactions is about 41,000. The Block gas limit for the Rinkeby testnet is about 30 million gas. The gas limit refers to the max price a cryptocurrency pays when sending a transaction, or performing a smart contract function in the Ethereum blockchain. Fees are calculated in gas units, and the gas limit defines the maximum value that the transaction or function can "charge" or take from the user. With the gas price at about 1,000 gwei and 0.1 h/s average network hash rate, it’s able to provide 100% uptime with 30-80 ms page latency. For the most up-to-date stats, check out the Rinkeby statistics page. WHY DO DEVELOPERS USE RINKEBY OVER OTHER TESTNETS? Many developers prefer Rinkeby because it’s more centralized compared to to PoW testnets like Ropsten that can be easily spammed. Using PoA enhances security overall in comparison to PoW. Developers also choose Rinkeby over other testnets due to its faster block time. Ropsten has a block time of about 30 seconds, but Rinkeby cuts that time in half. The chain data size for Rinkeby is only about 6GB. That means if you wanted to run an Ethereum node for Rinkeby, it wouldn’t require a large amount of data size compared to other testnets. Overall, Rinkeby is often known to be more reliable and faster than other testnets. WHAT ARE SOME DISADVANTAGES TO USING RINKEBY? One disadvantage to using Rinkeby is that its proof of authority blockchain consensus model doesn’t fully simulate the production environment. This is different from the Ropsten testnet where miners on the network have a financial incentive to maintain the testnet itself. The Ropsten testnet also uses a PoW consensus mechanism, which makes it identical to the current Ethereum consensus mechanism which also uses Proof of Work. Unlike the Kovan testnet, Rinkeby’s testnet supports Geth software and not Parity. HOW DO DEVELOPERS USE THE RINKEBY TESTNET? The main use case for using the Rinkeby testnet is for developers to test their applications in a controlled testing environment that functions like Mainnet Ethereum without taking the financial risk to execute smart contracts, iterate application features, and perform functionality. Rinkeby is famously used by well-known companies such as OpenSea, Manifold Studios, and Rarible. They deploy their marketplaces on Rinkeby and Rarible to deploy their NFT marketplaces on Rinkeby before deploying on mainnet. Developers also use the testnet as an educational tool. Often, developers make several mistakes along their journey. Using a testnet enables them to enhance their understanding of how to use the main network better in the future. Finally, developers use Rinkeby to test upgrades to the underlying platforms. This is essential to create better developer tools for the Web3 ecosystem and to create more libraries, better documentation, and essential feedback overall. All these use cases relate to creating a safe space for developers to thrive. Without testnets like Rinkeby, developers would bear the consequences of potentially losing real-world assets, and they would have to be more careful interacting with their smart contracts. HOW TO GET RINKEBY TESTNET ETH You can easily receive testnet ETH through a testnet faucet. Testnet faucets exist so developers can request funds and continue testing applications without real financial risk. Alchemy’s Rinkeby faucet is one of the most used and reliable faucets up to date. Here is how to make a test account for a Rinkeby faucet: STEP 1: SIGN UP This is very important. Sign up for a free Alchemy account to get five times as many testnet Ether tokens as you would without an Alchemy account. STEP 2: CHANGE YOUR NETWORK IN METAMASK Open Metamask and click the network name located at the top right of the window. STEP 3: ADD THE RINKEBY TEST NETWORK Click the Add Network button at the bottom of the pop-up window. STEP 4: ENTER THE RINKEBY TEST NETWORK DETAILS Feel free to select the Rinkeby Test Network already provided from Metamask by default. If you signed up for a free Alchemy account, you will be able to get your new RPC URL from the dashboard after creating a new app with the Rinkeby Testnet. This will give you more features and abilities provided by Alchemy as your new RPC URL node provider. * Network Name: Rinkeby Testnet * New RPC URL: https://eth-rinkeby.alchemyapi.io/v2/your-api-key * Chain ID: 4 * Currency Symbol: ETH * Block Explorer URL: https://rinkeby.etherscan.io/ STEP 5: GET FREE RINKEBY ETH To request funds, enter your wallet address and hit “Send Me ETH”. Remember, if you log in with Alchemy, you’ll receive 5x the amount of ETH for free. Note: We support wallets as received addresses but not smart contracts. There you have it, you now instantly have testnet ETH in your Metamask wallet. As always, please try it out and share this with developers building on the Rinkeby testnet that need fake ETH tokens. If you have any feedback, feel free to let us know in Discord! HOW TO SEND RINKEBY TESTNET ETH Sending testnet ETH works the same as it does on the Ethereum Mainnet. Once you’ve connected to the Rinkeby testnet network and received testnet ETH, follow these steps: STEP 1: SELECT "SEND" ON THE RINKEBY TEST NETWORK Select the send button within your Metamask wallet. Make sure you are connected to the Rinkeby Test Network, and then click the send button to send test ETH to another Rinkeby account. STEP 2: PASTE THE RECIPIENTS RINKEBY ADDRESS From here, paste in the address of the wallet that will receive your testnet ETH. In this example, we’ll use our Test Account 2 wallet address to send 0.01 ETH. ‍ STEP 3. CONFIRM THE TRANSACTION TO SEND RINKEBY ETH Click confirm to send your transaction. Be aware that there are still gas fees within testnets (which have no real value). ‍ That’s it! As you can see, our Test Account 2 wallet now has received 0.01 Rinkeby testnet ETH. WHAT ARE THE BEST RINKEBY TESTNET TOOLS? Rinkeby works best with other blockchain developer tools to ensure you have a great experience creating decentralized apps using a modern web3 tech stack. Web3 developers should consider the depth and breadth of developer tooling that is available. POPULAR WEB3 LIBRARIES Two of the most used Web3 native libraries include ethers.js and web3.js. These libraries natively support remote procedure calls (RPC) to blockchain nodes hosted on the blockchain interaction layer. This enables more seamless integration into a developer’s Web3 tech stack and reading and writing data to the blockchain. Alchemy has another Web3 library. The alchemy-web3.js library is a drop-in replacement for web3.js and is built and configured to work seamlessly with Alchemy and provide multiple advantages, such as automatic retries and robust WebSocket support. POPULAR WEB3 DEVELOPMENT ENVIRONMENTS Fortunately, EVM-compatible chains benefit from years of Ethereum development and have a host of battle-hardened options when it comes to development environments. Hardhat, Truffle, and Brownie are all great options when it comes to development environments in Web3. These developer environments allow developers to compile, test, deploy, and debug Ethereum software and testnets like Rinkeby. In addition, they come with more tooling and easily customizable local blockchain development environments. When it comes to decentralized storage, IPFS, Filebase, and Arweave serve as great options. Decentralized storage fills in the gap for expensive and inefficient frontend content like images, videos, and GIFs. ALCHEMY TOOLS Development platforms like Alchemy provide a large suite of tools for testing and finding bugs: Supernode, Build, Monitor, and Notify makes this whole process much more convenient. Alchemy’s Rinkeby development platform and dashboard help developers easily configure their needs in building Web3 decentralized applications. Alchemy’s JSON Composer helps developers create, fix, and share Ethereum requests, making the engineering process much faster. Finally, Rinkeby’s etherscan is useful to view transactions belonging to any public Ethereum address. START BUILDING TODAY As web3 grows from its current state to maturity, there will surely be paradigm shifts, new web3 infrastructure tools, and plenty to learn. Using testnets is an essential step to developing in web3 before deploying to Ethereum mainnet. With the Rinkeby testnet deprecated, developers can build while having the security, speed, and scalability alongside additional tools on the Goerli test network. Join a growing movement of developers—both Web3 natives and fellow travelers from Web2— and together we can build the future! INTERESTED IN READING MORE? There are five main benefits of running an Ethereum node: privacy and security, censorship resistance, decentralization, distributed control, and sovereignty. Testnets Top Sepolia RPC Providers and Public Endpoints (2023) Last Updated: March 3, 2023 Discover the Top Dedicated Sepolia RPC Node Providers and Public Sepolia RPC Endpoints Testnets Read more Testnets How to Add Sepolia to MetaMask Last Updated: March 3, 2023 Connect Your MetaMask Wallet to the Sepolia Blockchain to Start Testing Your Smart Contracts and Decentralized Applications Testnets Read more Testnets Goerli vs. Sepolia Testnet Comparison: Which is better? Last Updated: March 3, 2023 Explore the Technical Differences, Benefits, and Tradeoffs of Testing Smart Contracts on Sepolia and Goerli Testnets Testnets Read more BUILD WEB3 WITH ALCHEMY Alchemy combines the most powerful web3 developer products and tools with resources, community and legendary support.  Start building THE WEB3 DEVELOPER PLATFORM Supercharge your inbox Sign up for our developer newsletter: Thank you! Your submission has been received! Your email has been sumitted! Products Supernode Build Monitor Notify Amplify NFT API Developers Sign Up Login API Documentation Newsletter Status Rinkeby Faucet Goerli Faucet Kiln Faucet Mumbai Faucet Overviews Gwei Calculator Company Enterprise About Us Customers Newsroom Careers Blog Press Kit Terms of Service Contact General Inquiries Press Sales Discord Email © 2022 Alchemy Insights, Inc The web3 development platform Supercharge your inbox Sign up for our developer newsletter: Thank you! Your submission has been received! Oops! 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