# Welcome to PIN The blockchain host of the Open Index Protocol ("OIP") and other application-layer software. ![](/files/-M_iEoUmwFpgSHU2sPAw) PIN📌is a proof-of-work cryptocurrency designed to index web3 metadata. PIN also exists as a wrapped token on [Ethereum](https://etherscan.io/token/0xc1f976b91217e240885536af8b63bc8b5269a9be), Binance Smart Chain, and Polygon. {% hint style="success" %} **Looking for FLO? We've re-branded to PIN:** [**FLO Rebrand and Expansion Into Web3**](https://medium.com/public-index-network/upgrading-flo-to-pin-to-build-content-rich-web3-applications-d3b679b8f6ab) {% endhint %} Users and developers can **"pin"** metadata, permanently and immutably storing it on the network for public use. Pins can then be retrieved and read by any PIN-based application. When combined with its supporting metadata library, the [Open Index Protocol ("OIP")](https://www.openindexprotocol.com/), **PIN provides a new standard for publishing, indexing, and monetizing any digital content.** A robust development community is actively using PIN to create and index immutable links that will help to serve as the infrastructure for web3. [![](/files/-M_hXze0HyMMEP3vE__t)](https://docs.publicindex.network/for-users/exchanges) [![](/files/-MaBcoAD0wSDgb5gDj0U)](https://docs.publicindex.network/for-users/upgrade-flo-to-pin) > "The goal of PIN is to build a worldwide database of metadata for content on the web," > > — **Joseph Fiscella**, CEO of PIN Labs. {% content-ref url="/pages/-MZuTSDRvkyYn6AMLxI4" %} [Design Philosophy](/about-pin/design-philosophy) {% endcontent-ref %} ![](/files/-M_iEaA9UbvyvY9l-M65) {% embed url="" %} ![Established 2013](/files/-M_ltF1W37K57nC1Ubgt) # Design Philosophy What makes PIN special? ## PIN is designed to achieve four goals: 1. Provide a decentralized metadata layer 2. Provide proof of data integrity 3. Prevent widespread data atrophy 4. Provide high throughput of transactions {% content-ref url="/pages/-MZuTQIAfjZ-VICrz55O" %} [Features](/about-pin/features) {% endcontent-ref %} # Features The nuts and bolts ## PIN - The Secure Metadata Layer "Pins" can be added to any transaction and broadcast to the network. Pins cannot be changed without changing the input to the signature, which would invalidate the transaction. If the transaction is invalidated by a change to a pin, the block containing the invalid transaction will become invalidated as well, causing a cascading effect invalidating every block chained after it. This feature can be deployed to a variety of file storage, indexing, and retrieval applications. ## Proof-of-Work "FLO" Chain Details Initially, pins were limited to 140 bytes. Currently, 1040 bytes of data can be stored on the blockchain with a maximum block size of 1MB. Currently, 1040 bytes of data can be stored on the blockchain with a maximum block size of 1MB. If the blocks are consistently filled, the maximum block size may be increased. **With a target time of 40 seconds, PIN is fast. In fact, it is 15x faster than Bitcoin, and 3.75x faster than Litecoin.** To further assist with transaction throughput, the maximum ancestor limit for an unspent transaction output (UTXO) chain has been increased from the Bitcoin default of 25 up to 1250. This permits large amounts of information to be efficiently indexed. ## Additional PoW Security for FLO PIN does not allow reorganizations of 100 or more blocks, and uses a continuity of Proof-of-Work blocks to secure the blockchain. Once a transaction receives 100 confirmations (\~1 hour), it cannot be tampered with or removed from the blockchain. # History PIN is one of the oldest cryptocurrencies **PIN**, formerly FLO (The Flo Blockchain), is in its eighth year of growth and development. It launched in 2013 as a Litecoin fork and was established to be decentralized, secure, fast and efficient. PIN's blockchain structure is derived directly from Bitcoin's UTXO model, and its security is also provided from Proof of Work. PIN was created with no pre-mine, no ICO, no master-nodes, no airdrops, and no dev-fund. It was launched fairly to all participating miners and continues to maintain this core ethos of true decentralization. As a result, its community has driven its development since its inception and continues to do so to this day. {% content-ref url="/pages/-MZuTfPOaRXFxjobjFCl" %} [Timeline](/about-pin/history/timeline) {% endcontent-ref %} # Timeline In March 2021 the FLO Blockchain was rebranded to the Public Index Network - PIN **2013** :pushpin: * Jun 17th: FLO released by SkyAngel with no pre-mine and no ICO * Jul 9th: Florincoin is the 61st coin added to Cryptsy, the first major altcoin exchange * Sep 9th: Created the first block explorer, florinexchange.com/explorer, an open source explorer which is later replaced with * Nov 27th: Coordinated with Skyangel on a hard-fork (required update) to increase the transaction comment size to 528 bytes * Dec 10th: Started work on new website * Dec 16th: Songs of Love, a charity for children based in NYC, beings accepting FLO donations to make customized songs for children in need **2014** :pushpin: * Feb 1st: Created the FLO twitter account (Originally @Official\_Florin) * Feb 1st: Created a website, Aterna Love, to store valentine's day messages in the blockchain. Those messages still exist today * Feb 12th: Promoted FLO at the bitcoin center in NYC, with interview by Naomi Brockwell * Mar 2nd: Launched new florincoin.org website * Mar 20th: Florincoin subreddit created (originally /r/florincoin) * Apr 9th: Presentation about Florincoin at the 1st Cryptocurrency Convention at the scholastic auditorium in NYC * Apr 12th: skyangel releases Florin v0.6.5.13, a hard fork at block 426000, causing FLO to start adjusting difficulty every block * Jun 21st: skyangel releases Florin v0.8.7.2, up to date with the latest Litecoin codebase * Jun 22nd: bitcoinist.net article: exclusive Q\&A with Joseph Fiscella * Sep 20th: Alexandria team meets in San Diego to work on the project as a team for the first time * Oct 4th: Inside Bitcoins Las Vegas conference with the Alexandria Booth **2015** :pushpin: * Jan 1st: FLO and Alexandria mentioned in a chapter about blockchain applications in Melanie Swan's book Blockchain: A Blueprint for a New Economy * Mar 3rd: Released the first golang SDK for Florincoin, foundation, on github: * * * Mar 11th: FLO is open for trading on Bittrex * Mar 11th: FLO is open for trading on Poloniex * Apr 17th: Alexandria 0.4 walkthrough video: * Jun 10th: n-o-d-e.net interview with Alexandria * Jun 25th: Alexandria historian is born and begins recording historic data on the blockchain * Jun 29th: VICE article about Alexandria released: Could Cyberwar Cause a Library of Alexandria Event? * Aug 5th: LA times article about Blockchain Technology Group / Alexandria * Sep 24th: CoinTelegraph article about Alexandria * Dec 9th: Alexandria v0.5.1 alpha demo * Dec 16th: Alexandria booth at Inside Bitcoins San Diego **2016** :pushpin: * Mar 25th: FLO 0.10.4.0 released by Bitspill and the Alexandria team, as well as a pool mining historian blocks * Apr 8th: FLO used to store Libertarian Party votes in blockchain * May 3rd: Alexandria meetup in NYC (video URL missing) * Jun 19th: FLO 0.10.4.4 recommended update to latest Litecoin codebase * Nov 27: Alexandria presentation at DAppHack Berlin 2016 **2017** :pushpin: * May 15th: FLO meetup in NYC, Telegram channel created * May 25th: FLO/Alexandria presentation lived streamed from BitDevs NYC: * July 12th: Introducing Alexandria and the Open Index Protocol * July 28th: Amy's blog post about the Alexandria team's visit to San Diego * Aug 20th: Valentin Jesse creates a FLO touchbar app for the 2017 MacBookPro * Nov 29th: New logo and new website concept released and revealed to community in the rebranding initiative * Dec 22nd: New website launched: * Dec 22nd: Flotorizer launched at flotorizer.net, Medium article written by Davi Ortega describing the creation of a FLO blockchain dApp as a non-programmer * Dec 24th: FLO Community Update * Dec 31st: SharedSecret.net, the first blockchain-based implementation of Shamir's Secret Sharing algorithm, is live (again created by Davi Ortega) **2018** :pushpin: * Jan 13th: Live-streaming FLO dev on twitch.tv * Jan 18th: FLO python SDK released * Jan 18th: FLO added to brainwalletX * Jan 18th: FLO C# SDK released * Feb 23th: FLO partners with YBF Ventures * Mar 20th: FLO releases version 0.15 with segwit support, up-to-date with current Bitcoin and Litecoin codebases: * May 1st: The Jensen Lab at the California Institute of Technology (Caltech) has announced a new initiative that uses blockchain technology to store the ETDB * May 1st: SPV wallet floj is open-sourced by Alexandria and Medici teams * May 20th: FLO is now ready for cross-chain dapps with the Blocknet Protocol! * June 29th: FLO summit 2018 at the @alexandria office in San Diego * July 15th: TheCoin.pw has recently opened a new cryptocurrency exchange and is trading FLO at trade.thecoin.pw * July 17th: FLO summit 2018 held in San Diego * July 26th: Website updated with dapps dashboard * July 27th: Instant exchange @ChangeNow\_io has added FLO to its platform. $FLO is now available for exchange with $BTC, $USD, $EUR and 150 other cryptocurrencies at * July 29th: OpenBazaar adds FLO to its decentralized marketplace: * Aug 7th: Now you can buy $FLO without additional fees, fast and secure at * Aug 13th: Vivek Teega wrote a technical piece on how to use a javascript library to sign and verify messages with FLO * Aug 1st: Decentralized Web Summit @decentralweb - Devon James, Amy James, Chris Chrysostom, and Davi Ortega present how they use the FLO blockchain to build dApps with OIP * Aug 15th: 336pi launches the "SkyPiCast - FLO Blockchain Sessions and Hands On App Development" initiative at * Sep 4th: FLO was added to the @BitTabApp desktop app! FLO can now be tracked on the desktop with a Windows application providing alerts and a sticky note feature * Sep 14th: 51% attack and the proposed solution * Oct 8th: New FLO update to combat 51% attacks released! Please upgrade your clients as soon as possible * Oct 19th: The FLO team is happy to be part of the investFeed community! * Oct 24th: The FLO website now has a roadmap section - let us know what else you'd like to see added into the FLO ecosystem! * Oct 25th: ETDB-Caltech showcases a blockchain-based distributed public database for electron tomography built with the help of the FLO Blockchain * Oct 29th: Amy James presents Open Index Protocol at 2018 Texas Bitcoin Conference in Austin, Texas * Nov 21th: FLO is now in the @bituniverse\_org link program! Stay up-to-date with FLO news using the BitUniverse app * Dec 10th: Looking FLOward to 2019 * Dec 20th: MLG (Overstock subsidiary) signed a memorandum of understanding with Teton County, Wyoming, to digitize property titles. [www.coindesk.com/wyoming-county-moves-to-put-land-records-on-blockchain](http://www.coindesk.com/wyoming-county-moves-to-put-land-records-on-blockchain) * Dec 20th: FLO is now listed on the BitRabbit exchange **2019** :pushpin: * Jan 3rd: FLO Foundation established as a Ltd. in Hong Kong, for the purposes of non-profit fundraising for dev. of community sponsored software and apps on the FLO blockchain. [www.flo.foundation](http://www.flo.foundation) * Jan 7th: FLO Foundation memo regarding initiative rollover * Jan 8th: Tokenview lists FLO! Now you can check the latest block info and data analysis of FLO Click for details: * Jan 9th: FLO block mining reward halving took place, decreasing the coin reward from 12.5 FLO to 6.25 FLO. Check for more information * Jan 9th: FLO is now listed on @Tokokcom * Jan 9th: FLO is now listed on Mxshine * Jan 13th: Announcing OIP-Express: Create a FLO webapp in seconds using this dead-simple javascript @nodejs library * Jan 14th: World's first @FLOblockchain @GooglePlay #App A simple app to let you experience #blockchain #FLOCard * Jan 14th: The @theJensenLab @caltech and @alexandria got the top 2018 blockchain paper & research teams award for * Jan 19th: Twitter bot scanning the FLO blockchain for interesting floData and notable blocks, such as halving blocks, OIP records, artifacts with media etc * Jan 23rd: FLO is now listed on FreiExchange * Apr 15th: Davi R. Ortega, et al. publish "ETDB-Caltech: A blockchain-based distributed public database for electron tomography" * Mar 12th: Alexandria enters into strategic partnership with PUBLISH, Inc. * Jun 10th: FLO Blockchain and Opacity Storage partner to promote Blockchain, Privacy-centric Communication Applications * Jul 17th: Medici Land Governance writes more than 185,000 county property records to the FLO Blockchain via its Teton County Blockchain Pilot * Jul 24th: FLO is now listed on Vertbase * Aug 21st: FLO is now listed on changeangel * Sep 5th: FLO is now on the POX Mobile Wallet: * Sep 16th: The FLO Foundation announces Trezor support via * Oct 25th: JRichard, Davi Ortega, and Martin Adams publish GNU Privacy Guard and Flotorizer: A Match Made in Cryptography | * Nov 12th: FLO is now listed on abra.com * Nov 13th: In The FLO publishes State of the FLO | # Applications and Projects Check out who is building on PIN! ## Streambed
{% content-ref url="/pages/-MZuTqT2qUrl\_L1KUZ7E" %} [Streambed Media](/about-pin/applications-and-projects/streambed-media) {% endcontent-ref %} ## Alexandria
{% content-ref url="/pages/-MZuTwBu1cgPBeq-65aw" %} [Alexandria](/about-pin/applications-and-projects/alexandria) {% endcontent-ref %} ## Medici Land
{% content-ref url="/pages/-MZuTyTxfKR80vh3JREc" %} [Medici Land](/about-pin/applications-and-projects/medici-land) {% endcontent-ref %} ## FLOCard
{% content-ref url="/pages/-MZuU0CXhsMHR7UacPXD" %} [FLOCard](/about-pin/applications-and-projects/ranchimall) {% endcontent-ref %} ## RanchiMall
{% content-ref url="/pages/-MZvikvvQrs3Q66pe5Td" %} [RanchiMall](/about-pin/applications-and-projects/ranchimall-2) {% endcontent-ref %} ## Flotorizer
{% content-ref url="/pages/-MZvjyVZAmAMi1z3Op\_q" %} [Flotorizer](/about-pin/applications-and-projects/flotorizer) {% endcontent-ref %} ## Shared Secret
{% content-ref url="/pages/-MZvjolcBoXcIQZ-lJsl" %} [Shared Secret](/about-pin/applications-and-projects/shared-secret) {% endcontent-ref %} ## Caltech ETDB
{% content-ref url="/pages/-MZvjerm2NO8KEOSujTZ" %} [Caltech ETDB](/about-pin/applications-and-projects/caltech-etdb) {% endcontent-ref %} # Streambed Media
**Streambed** is an analytics suite for the social sharing world. Our tools allow creators to link co-creators and brands to the videos they publish. Allowing everyone to repost content and benefit from transparent analytics. {% embed url="" %} # Alexandria
**Alexandria** was named as an homage to the ancient Great Library, a universal library for all knowledge, because its built using Open Index Protocol, a public space on the internet for all information. {% embed url="" %} # Medici Land
Blockchain-Based Property Registry by **Medici** Ventures {% embed url="" %} # FLOCard
**FLOCard** is a one-stop solution securely built on the FLO Blockchain. Create, Store and, Exchange business cards with ease of use and ease of mind. Finally, an indestructible card wallet! {% embed url="" %} # RanchiMall
A messenger made with **Blockchain** and **Open Source** technologies. Take back control of your data that belongs to you and you alone. {% embed url="" %} # Flotorizer
Flotorizer notarizes any file within the FLO blockchain using the tx-comment field & provides the blockchain info needed to prove that the file exists on the chain. {% embed url="" %} # Shared Secret
This dapp let you save encrypted secret in the FLO blockchain and produces a number of keys that must be combined to be able to decrypt the secret. {% embed url="" %} # Caltech ETDB
A public repository stored with OIP and FLO featuring 11293 electron tomography datasets of intact bacterial and archaeal cells, representing 85 species {% embed url="" %} # The PIN Team Meet the PIN Team. ![](/files/-M_lloeend09GpzygCEd) ## Joseph Fiscella Joseph is Chief Technology Officer and Lead Blockchain Developer at Blockparty. He has been part of the PIN Core team since launch, and is co-founder of Alexandria. With 7 years of full time blockchain experience, Joseph brings a deep wealth of industry talent and insight to the PIN Core team. :bird:**Twitter:** ## Devon James Devon is the inventor of Open Index Protocol (OIP), a blockchain specification for a worldwide database, CTO of Alexandria Labs and application for content on the Open Index and CEO of Blockchain Technology Group a company that incubates ideas. He has worked for Apple and Sony, deployed twice overseas as a US Marine infantryman, contributed to Emmy & Oscar winners as a post-production artist, and co-founded a small design/manufacture/import business. :bird:**Twitter:** ## Davi Ortega Davi is a PhD in computational biophysics working as a postdoctoral scholar in the Jensen Lab at Caltech. He is the project coordinator for ETDB and a developer of several applications focused in data visualization for bioinformatics. Davi is passionate about evolution of complexity and distributed forms of governance. :bird:**Twitter:** ## Bitspill Bitspill has been a blockchain developer for over 5 years, and has been a member of the PIN core team for most of that time. He is a contributor to the following projects: PIN Core, Alexandria, OIP, SIA Coin, MiningCore, Bitcoin Test Suite, Verge Electrum Wallet, and Ethereum. :bird:**Twitter:** ## Jesse Valentin Jesse is a Front End Developer and blockchain expert. Valentin has been an active contributor to PIN and Alexandria since 2016 and joined the PIN Core team in 2017, creating front and back end applications for PIN. Valentin is the creator of the PIN website as well as the block halving information page. ## Sky Young Sky is a full-stack developer who has worked on everything from decentralized file storage and transfer systems to protocols built on top of blockchains. Sky has been on the PIN Core team since 2015, is Full Stack Web Developer at Alexandria, and is a member of the OIP Working Group. :bird:**Twitter:** ## Amy James CEO of Alexandria Labs a content application for music, podcasts, video and other media published to the Open Index. She introduced the ’Salutary Protocols’ blockchain economic model to contribute to the ‘fat’ and ‘thin’ protocol models. Previously, she has worked at nonprofit arts organizations, political campaigns and as an independent writer/director. :bird:**Twitter:** ## Chris Chrysostom Chris has developed software for more than 30 years. His experience ranges from inventory control desktop databases to large healthcare and supply chain systems. He came to PIN by working with Alexandria in 2016. Later work includes the Teton County Blockchain Pilot with Medici Land Governance adding more than 187,000 property records to OIP and PIN. Currently, he provides development help on several blockchain projects. :bird:**Twitter:** ## Kirill Gourov Kirill is Director at Eastmore Group, a New York based alternative investing firm, where he focuses on digital currency investment. He also manages strategy at Compass Blockchain Solutions, a blockchain consulting firm. Kirill has been a PIN team member since 2013. :bird:**Twitter:** ## Sam Sam is PIN’s marketing expert and commercial strategist who works with CEOs, marketing teams and agencies to deliver smarter marketing. Sam has worked in marketing and commercial roles for Red Bull, Experian, Zomatio, and Peazie. Some of Sam’s clients also include BMW, Air Asia, and Fox Sports. Sam’s specialty is campaign planning, strategy, ROI planning and attribution, data acquisition, conversion optimization, audience building, and go to market strategies. ## Ray Ray is a developer and inventor with 30 years of experience envisioning, architecting, producing, and maintaining technical solutions. Ray has a background in electronics, engineering, and computing and has been part of the PIN Core team since 2017. # Exchanges Exchanges, DEXS PIN exists on both the Ethereum Mainnet and the Binance Smart Chain (different token address on each chain). Look below to find our recommended ways to get PIN. {% tabs %} {% tab title="PIN on Ethereum" %} ## PIN on the Ethereum Mainnet {% hint style="success" %} Ethereum token address [0xc1f976B91217E240885536aF8b63bc8b5269a9BE](https://etherscan.io/token/0xc1f976B91217E240885536aF8b63bc8b5269a9BE) {% endhint %} ## Uniswap: **Uniswap** is a decentralized finance protocol that is used to exchange cryptocurrencies. * :unicorn:[Link](https://app.uniswap.org/#/swap?inputCurrency=ETH\&outputCurrency=0xc1f976B91217E240885536aF8b63bc8b5269a9BE) ## Bilaxy: **Bilaxy** is a centralized crypto currency exchange site. * [Link](https://bilaxy.com/trade/PIN_ETH) {% endtab %} {% tab title="PIN on BSC" %} ## PIN on the Binance Smart Chain {% hint style="success" %} Binance Smart Chain token address [0x3b79a28264fc52c7b4cea90558aa0b162f7faf57](https://bscscan.com/token/0x3b79a28264fc52c7b4cea90558aa0b162f7faf57) {% endhint %} ## PancakeSwap: **PancakeSwap** is a decentralized exchange built on Binance Smart Chain * :pancakes:[Link](https://pancakeswap.finance/swap#/swap?inputCurrency=BNB\&outputCurrency=0x3b79a28264fc52c7b4cea90558aa0b162f7faf57) {% endtab %} {% endtabs %} ## PIN Ethereum chain to BSC Swap PIN Swap **(ERC20/BEP20)** on **Anyswap.** [**https://anyswap.exchange/swap**](https://anyswap.exchange/bridge?inputCurrency=0x3b79a28264fc52c7b4cea90558aa0b162f7faf57\&network=bsc) ## FLO Exchanges: | Exchange | Link | | ------------ | ------------------------------------ | | Bittrex | | | Coinswitch | | | Changeangel | | | FreiExchange | | | Sequoir | | | Abra | | | TOKTOK | | # Mining ## FLO Mining at a Glance: * Proof of Work (PoW) - sCrypt algorithm * Block Time: 40 seconds * Total Coin Supply: 160,000,000 * Halving: Every 800,000 blocks * Next Halving: Block 4,800,000 (Fri Jun 11 2021 03:47:30 GMT+0000) ## Mining Pools and Guides: :link: Medici Land Governance Mining Pool + [Guide](https://pool.mediciland.com/connect.html) :link: [RanchiMall: How to setup a PIN Mining Node](https://medium.com/ranchimall/how-to-setup-florincoin-mining-node-d2d6a464090) :link: [Zergpool](https://zergpool.com/) +[ Zergpool FAQs](https://zergpool.com/site/faq) :link: [Suprnova](https://flo.suprnova.cc/) + [Guide](https://flo.suprnova.cc/index.php?page=gettingstarted) :link: [Mining Dutch](https://www.mining-dutch.nl/pools/florin.php) # Wallets There is a variety of Desktop, web, and app-based wallets available for PIN For ERC-20 PIN on ETH you can use any [Ethereum based wallet](https://ethereum.org/en/wallets/) and add PIN as a custom token ([0xc1f976B91217E240885536aF8b63bc8b5269a9BE](https://etherscan.io/token/0xc1f976B91217E240885536aF8b63bc8b5269a9BE) ). Currently these are the wallets we recommend you use. * [Metamask](https://metamask.io/) * [Trust Wallet](https://trustwallet.com/) ## FLO Wallets: **Desktop Wallet and Node:** {% embed url="" %} **Chaintek Trezor Integration:** {% embed url="" %} **POX Mobile Wallet - Android:** {% embed url="" %} # Block Explorers ### Currently, there are three main block explorers for FLO: 1. :link: [PIN Block Explorer ](http://network.flo.cash/) 2. :link: [PINsight](https://livenet.flocha.in/) 3. :link: [Tokenview](https://flo.tokenview.com/en/) ### Etherscan provides a block explorer for ERC2 1. :link: [Etherscan](https://etherscan.io/token/0xc1f976b91217e240885536af8b63bc8b5269a9be) {% content-ref url="/pages/-M\_gZfF24DXPV6dyf29B" %} [Upgrade FLO to PIN](/for-users/upgrade-flo-to-pin) {% endcontent-ref %} # Upgrade FLO to PIN The proof-of-work currency FLO can be upgraded to PIN ## PIN Labs registration website Proof-of-work FLO can be migrated to PIN on Ethereum or Binance Smart Chain via the PIN Labs one-way- bridge. Register for the FLO to PIN upgrade here: :pushpin:[https://register.publicindex.network/ ]() ## FAQ **Q:** *Will PIN remain a proof-of-work network?*\ **A:** Yes. The canonical FLO chain is, and always will be, proof-of-work. ERC-20 PIN will be migrated from the canonical FLO chain into other chains to access different web3 features. **Q:** *Will the cap remain at 160,000,000 PIN?*\ **A:** Yes. **Q:** *Where can I upgrade my FLO to PIN?*\ **A:** See to register for the upgrade. **Q:** *Where can I learn more?*\ **A:** Join our Telegram chat: and check out our new website **Q:** *How can I help?*\ **A:** Join Telegram and receive bounties for creating content and working on the protocol. **Q:** *Where can I see burned FLO that's been upgraded to PIN?*\ **A:** \ **A:** # PIN on Github {% embed url="" %} # What is OIP? [**Open Index Protocol**](https://www.openindexprotocol.com/) (OIP) is an open source specification for a persistent worldwide index and file library useful for data publishing, file distribution and facilitating direct payments. OIP uses PIN to operate with no central authority: record indexing, file storage/distribution and transaction management are carried out collectively by the decentralized network. OIP is the first **permissionless system** with a decentralized and transparent index for digital content and protected file persistence. The system uses a **Salutary Protocol model**, which funnel financial incentive to both application and protocol layers, ensuring sustainability and antifragility of the system through open market incentive alignment of all participants. ![Application Layer Service Providers](/files/-MZxG9PsWMnHP0gVtUbU) ![Protocol Layer Service Providers](/files/-MZxGIknIEKnLCgR-6sE) {% embed url="" %} **Learn more about OIP here:** {% embed url="" %} # OIP on Github {% embed url="" %} # PIN Community & Social Media Learn more about PIN, engage with the team and others in the community! [![](/files/-MZuk6oo0UKEPfMZQzuz)](https://twitter.com/pinblockchain) [![](/files/-MZullvUBW4fjyYVONwp)](https://medium.com/floblockchain) [![](/files/-M_rIhfQf1Fo2unlb7ks)](https://t.me/floblockchain) [![](/files/-MZumraLDlx9qQe0KYFM)](https://www.reddit.com/r/floblockchain/) [![](/files/-MZusUBhWbWtmdSJ9Y6b)](https://discord.com/invite/EzgXH6s) [![](/files/-MZupznirB337GFzXbMv)](https://bitcointalk.org/index.php?topic=236742) ## Official Communities | Socials | URL | | ----------- | ------------------------------------------------ | | Twitter | | | Medium | | | Telegram | | | Reddit | | | Discord | | | Bitcointalk | | # Contribute to PIN Join the community on telegram or contribute code to github! {% embed url="" %} {% embed url="" %}