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      "body": "![rpc.gif](https://cdn.steemitimages.com/DQmTngcrfMVgjWjuSUBn9ksQ6NqDGF7eoukMZwSFrirP4sQ/rpc.gif)\n\n\nGridcoin RPC library has been update to comply with Gridcoin Research b5.5.0\n\nA lot new commands has been added, also, deprecated arguments and commands has been removed.\nSmoke tests has been introduced to test no-mutation calls against the running testnet instance.\n\nhttps://github.com/gridcat/gridcoin-rpc",
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      "memo": "Hi @gridcat. Would you like to earn solid (115k SP) upvote on your latest post from @project.hope? Check out our recent post for more details. And hopefully you will find this publication worth your time and attention. We're explaining our community economy \"business model\", hoping that more people will join our efforts in the future. // LINk: https://steemit.com/hive-175254/@project.hope/project-hope-economy-explained-2021"
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      "memo": "❗ Hello gridcat, great that you are using the STEEM blockchain. The Executive Board is publishing insider infos at https://discord.gg/KyBbmhh on how you will be earning the most coins. It's easy, just follow the instructions. THE 1000X BOOSTER KEY is already waiting for you over there too. 😉 Warm regards, The Executive Board."
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      "title": "Gridcoin Proof of Existence service",
      "body": "![brett-jordan-e-CqOxx8oXw-unsplash.jpg](https://cdn.steemitimages.com/DQmabxdD6Vx7xuVmEAtRzFkYYWXgzYmv9we4w3b1EVtJHcp/brett-jordan-e-CqOxx8oXw-unsplash.jpg)\n\nGood morning folks!\nI’d like to share with you the project I’ve been working on for some time.\nThis is a blockchain stamp service running on gridcoins (proof of existence).\n\nProof of Existence (PoE) helps to prove that a certain document/file/media was created (existed) on a particular date and time. You can create a hash of any file (document, media, etc) and store the record in the blockchain. As all transactions are stored in the blocks which keeps time of creation and data in the blockchain is immutable it is nearly impossible to modify that proof. Hash represents the fingerprint of the file, so if any bit of a file gets changed the hash will be absolutely different.\nYou can prove that the document existed at a particular time by creating a hash of a document and finding the appropriate block in the blockchain which keeps that hash.\n\nI haven’t seen it done for gridcoin, so I decided to deliver one.\n\nHow it works\nStamping documents:\n1) You choose the document you want to stamp.\n2) Service will calculate SHA256 of your file. We do not store your documents, we even do not send them to the server (you can check it yourself just by inspecting the Network tab), all we need is just the SHA256 hash of the file and it is done 100% on the client-side (in the browser).\n3) Service will submit the hash to the server, where we will bake a transaction with a unique signature (so later we can recognize this).\n4) Service will scan the blockchain and provide you back with a block and transaction id where the proof was stored.\n\nChecking documents:\n1) You choose the document you want to check\n2)  Service will calculate SHA256 of your file. Then it will search in the blockchain for proof of existence and if it is there, it will give back to you the block number, transaction id, and the time this proof was made. If proof doesn't exist it will offer you to create one.\n\nCosts\n\nThe service at the moment is free of charge. To make the single proof it costs something about 0.001 GRC, so it is quite cheap (at the moment of writing this article) to make the transaction. I have no idea how things will turn in the future, so maybe one day I will change how it works (by introducing customer accounts may be), but for now, it is free as long as the wallet has some funds on it.\nYou can contribute by setting up a side staking, or by just simply donating to the service wallet.\nOr you can use any public faucet and just set up the service wallet address as a recipient. It will help a lot, plenty of transactions could be made just for one single faucet payment.\nThe service wallet address is SHpqN8xEjy2HHTnAGfgJjwFThuqzLbBs6i\n\nFurther plans\n\nService isn’t yet finished, this is just a test run, I’d really like to have feedback at the early stage and actually to see the demand (if any at all). Things I consider adding soon:\n1) Create API documentation. API is open and in theory, you don’t need to use the service to notarize documents. You can use API directly and provide just a hash, the rest will be done under the hood.\n2) Create an About page. I want to describe the protocol, so at the end, you can bake transactions by yourself, no service is needed, but you will be able to make a proof of existence.\nAnyway, there are a lot of different protocols doing the exact same thing. This is just one more implementation.\n3) Make it mobile-friendly\n4) As soon as I will be happy with the code quality, I will open-source it. So I will want to do some refactoring and enhancements.\n\nAh, yes, here is the service address: https://stamp.gridcoin.club\n\nP.S. If you are willing to praise the author, you can send some thanks right here: SJVaQcJriv7N8Py8eWjNUtWPTPBtDZashD",
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      "author": "steemitboard",
      "permlink": "steemitboard-notify-gridcat-20191009t205109000z",
      "title": "",
      "body": "Congratulations @gridcat! You received a personal award!\n\n<table><tr><td>https://steemitimages.com/70x70/http://steemitboard.com/@gridcat/birthday2.png</td><td>Happy Birthday! - You are on the Steem blockchain for 2 years!</td></tr></table>\n\n<sub>_You can view [your badges on your Steem Board](https://steemitboard.com/@gridcat) and compare to others on the [Steem Ranking](https://steemitboard.com/ranking/index.php?name=gridcat)_</sub>\n\n\n**Do not miss the last post from @steemitboard:**\n<table><tr><td><a href=\"https://steemit.com/steemfest/@steemitboard/the-new-steemfest-badge-is-ready\"><img src=\"https://steemitimages.com/64x128/https://cdn.steemitimages.com/DQmRUkELn2Fd13pWFkmWU2wBMMx39EBX5V3cHBEZ2d7f3Ve/image.png\"></a></td><td><a href=\"https://steemit.com/steemfest/@steemitboard/the-new-steemfest-badge-is-ready\">The new SteemFest⁴  badge is ready</a></td></tr></table>\n\n###### [Vote for @Steemitboard as a witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1) to get one more award and increased upvotes!",
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      "memo": "BuildTeam is proud to announce the release of DLease.io - our flagship P2P leasing marketplace app, aimed at assisting Steemians in leasing and delegating STEEM POWER for daily passive returns, with recent yields as high as 20% APR. DLease.io is a professional grade app , designed to replace the current MinnowBooster.net leasing market which has to date facilitated nearly 20 Million STEEM POWER in lease value to happy BuildTeam customers. View the new app at https://dlease.io/ or read the announcement post on https://steemit.com/@dlease."
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      "author": "partiko",
      "permlink": "partiko-re-gridcat-having-fun-with-retro-pi-20190225t211345249z",
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      "body": "Hello @gridcat! This is a friendly reminder that you have 3000 Partiko Points unclaimed in your Partiko account!\n\nPartiko is a fast and beautiful mobile app for Steem, and it’s the most popular Steem mobile app out there! Download Partiko using the link below and login using SteemConnect to claim your 3000 Partiko points! You can easily convert them into Steem token!\n\nhttps://partiko.app/referral/partiko\n\n![](https://d1vof77qrk4l5q.cloudfront.net/statics/partiko-poster-best-steem-app-for-your-phone.jpg)",
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      "permlink": "re-hotbit-re-gridcat-re-hotbit-bootstrapping-gridcoin-economy-and-building-ecosystem-20190217t205951233z",
      "title": "",
      "body": "got slack\ninvite me pls\ngridcat at protonmail.com",
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      "steem_payout": "4.277 STEEM",
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      "author": "gridcat",
      "permlink": "re-vortac-re-gridcat-re-gridcat-gridcoin-rpc-promise-based-nodejs-rpc-library-20190112t231723191z",
      "title": "",
      "body": "Yup it did :) Thank you",
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      "permlink": "re-gridcat-re-gridcat-gridcoin-rpc-promise-based-nodejs-rpc-library-20190112t225823613z",
      "title": "",
      "body": "My upvote improved it a little :)",
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      "author": "gridcat",
      "permlink": "re-gridcat-gridcoin-rpc-promise-based-nodejs-rpc-library-20190110t181326529z",
      "title": "",
      "body": "Lol.\nReviewer actually earned with my code 6 times more than I did.",
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