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      "body": "Congratulations @msjavan! You received a personal award!\n\n<table><tr><td>https://steemitimages.com/70x70/http://steemitboard.com/@msjavan/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/@msjavan) and compare to others on the [Steem Ranking](https://steemitboard.com/ranking/index.php?name=msjavan)_</sub>\n\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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      "author": "msjavan",
      "body": "I recently create a dashboard to monitor the Blockchain technologies based on their application in following categories:\n\nFinance & Banking & Payment\nSmart Contract and Token Distribution\nSmart Assets\nDapp\nBlockchain as a Service\nE-Commerce & Micropayment\nInternet of Things\nIdentity\nPrivacy\nExchange & Marketplace\nStorage\nContent\nMessaging\nComputing\nInvestment\nEntertainment\nForecasting\nSupply Chain\nInvoice\n\n\n![blockchain_EN.jpg](https://steemitimages.com/DQmTqu3JjQpwijggWaXfJhPJZJfh6c2JEcNgMtKc7zKCHzU/blockchain_EN.jpg)\n\nYou can access it using following link:\nhttp://msjavan.ir/dashboard-en.html\n\nplease introduce/comment me about the missing categories and technologies.",
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      "body": "is it on?",
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      "author": "msjavan",
      "body": "Please Send @msjavan IOTA BXQLIGVH9WCSARXJPUBDRCFJEASYQNFRLFWGHGEJYYQWVXQQYWOATBZKNVVVVNIQKRHYDBJUUPNGBRTZYPTILLDJMY",
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      "author": "msjavan",
      "body": "more volatility, more opportunities !",
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      "author": "msjavan",
      "body": "what about bitcoin vulnerabilities discussed here?\nhttps://steemit.com/bitcoin/@msjavan/warning-bitcoin-network-is-highly-vulnerable\n\nI think it is more valuable to exploit such vulnerabilities now!",
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      "author": "msjavan",
      "body": "@@ -1037,8 +1037,186 @@\n t parts.\n+%0A%0A* %5BInteract with Bitcoin Blockchain directly using Python (Part 2)%5D(https://steemit.com/cryptocurrencies/@msjavan/interact-with-bitcoin-blockchain-directly-using-python-part-2)\n",
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      "parent_author": "",
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      "title": "Interact with Bitcoin Blockchain directly using Python (Part 1)"
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      "author": "msjavan",
      "body": "In the  [Part 1](https://steemit.com/cryptocurrencies/@msjavan/interact-with-bitcoin-blockchain-directly-using-python-part-1) you can see how to install blockchain library in the python and query the last exchange prices. In this part, you will see how to explore blocks and transactions. first you need to import library:\n\n```\nfrom blockchain import blockexplorer as explorer\n\n```\n\n\nYou can retrieve any desired block (e.g. genesisBlock):\n```\ngenesisBlock = explorer.get_block('000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f')\n\n```\n\nThere are some operation available on the block. as an example you can return height of block:\n\n```\ngenesisBlock .height\n\n```\n\n![Bitcoin_Block_Data.jpg](https://steemitimages.com/DQmXTo38ZzJmNVS97Dyxp4JupLXa6JvgGgJaEtViCk6LSVW/Bitcoin_Block_Data.jpg)\nTo retrieve transactions you can use following codes:\n\n```\nfirstTransaction = explorer.get_tx('4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b')\n\n\n```\n\nThere are some operation available on the transaction. as an example you can return size of transaction:\n\n```\nfirstTransaction.size\n\n```\n\nto retrieve new transactions (unconfirmed), you can use \"get_unconfirmed_tx\" function:\n\n```\ntxs = explorer.get_unconfirmed_tx()\n\n```\n\nAlso you can retrieve any wallet information using following codes (e.g. genesis wallet):\n\n```\ngenesisAddress = be.get_address('1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa')\ngenesisAddress.total_sent\n\n```\n\nWe will see how to get blockchain statistical information in the next part.\n\n\n* [Interact with Bitcoin Blockchain directly using Python (Part 1)](https://steemit.com/cryptocurrencies/@msjavan/interact-with-bitcoin-blockchain-directly-using-python-part-1)",
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      "author": "msjavan",
      "body": "Hi, Thanks, I started follow you too.",
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      "author": "osmanie",
      "body": "Hello ! I just read your content, I love it. Follow me @osmanie and I follow you too!",
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      "author": "msjavan",
      "body": "@@ -1014,17 +1014,17 @@\n  more st\n-a\n+u\n ffs in t\n",
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      "author": "msjavan",
      "body": "There is a library in python for blockchain which you can interact with Bitcoin Blockchain directly using  Blockchain.info API:\n\n1- Installing The Blockchain Package:\n```\npip install blockchain\n\n```\n\n\n2- Adding exchange module:\n```\nfrom blockchain import exchangerates\n\n```\n\n3- Iterate exchange rates:\n```\nrates = exchangerates.get_ticker()\nfor r in rates:\n\tprint r, rates[k].last\n\n```\n\nThe output is as follows:\n```\nPLN 33996.01\nTWD 289581.75\nGBP 7221.0\nCNY 65624.75\nCHF 9463.44\nINR 621673.88\nCAD 12259.46\nNZD 13970.86\nISK 991664.96\nAUD 12663.7\nBRL 31071.6\nKRW 10490324.09\nHKD 75343.46\nTHB 314941.51\nSGD 12983.99\nJPY 1080834.1\nEUR 8086.77\nSEK 79957.99\nUSD 9657.82\nRUB 561667.26\nDKK 60148.97\nCLP 6128852.57\nIn [41]:\n\n```\n\nThese prices have many features including: last, buy, sell, and symbol. So you will be able to interact with the network in a whole new way.\n\n![Bitcoin-Value-Graph3.png](https://steemitimages.com/DQmXQnbREKGLgGGj9cVmwEjibUsQCeY9XwvACrUZqbynjZ8/Bitcoin-Value-Graph3.png)\n\n\nWe will investigate more staffs in the next parts.",
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      "author": "msjavan",
      "body": "Thanks :)",
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      "body": "Congratulations @msjavan! You have completed some achievement on Steemit and have been rewarded with new badge(s) :\n\n[![](https://steemitimages.com/70x80/http://steemitboard.com/notifications/votes.png)](http://steemitboard.com/@msjavan) Award for the number of upvotes\n\nClick on any badge to view your own Board of Honor on SteemitBoard.\nFor more information about SteemitBoard, click [here](https://steemit.com/@steemitboard)\n\nIf you no longer want to receive notifications, reply to this comment with the word `STOP`\n\n> By upvoting this notification, you can help all Steemit users. Learn how [here](https://steemit.com/steemitboard/@steemitboard/http-i-cubeupload-com-7ciqeo-png)!",
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      "body": "A key characteristic of bitcoin is that once a transaction is valid, it remains valid and does not expire. Upon a transaction happens, with little risk, that the transaction will shortly be included in a block and confirmed.\n\nBut there is a way to **cancel a transaction** by double-spending its inputs with another transaction before it is mined. Also by connecting the wallet into your desired network as earlier discussed at [here](https://steemit.com/bitcoin/@msjavan/warning-bitcoin-network-is-highly-vulnerable) you can do it much more easier !\n\n![U5dsmGC4Lr4LrKWnBMV3zhqgXWmFM6G_1680x8400.jpg](https://steemitimages.com/DQmbiyhHZYKQzqBbCazjZjEAWs2GRz2NH97JT3WxK3pkSvj/U5dsmGC4Lr4LrKWnBMV3zhqgXWmFM6G_1680x8400.jpg)\n\nYou can study more about bitcoin vulnerabilities here:\n* [Bitcoin Network Vulnerabilities](https://steemit.com/bitcoin/@msjavan/warning-bitcoin-network-is-highly-vulnerable)\n* [Two new models of double-spend attack on the Bitcoin blockchain](https://steemit.com/bitcoin/@krasotka/two-new-models-of-double-spend-attack-on-the-bitcoin-blockchain)",
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