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    {
      "parent_author": "ajose01",
      "parent_permlink": "4qpcsr-eos-signature-verification-with-elixir",
      "author": "steemitboard",
      "permlink": "steemitboard-notify-ajose01-20190507t200827000z",
      "title": "",
      "body": "Congratulations @ajose01! You received a personal award!\n\n<table><tr><td>https://steemitimages.com/70x70/http://steemitboard.com/@ajose01/birthday1.png</td><td>Happy Birthday! - You are on the Steem blockchain for 1 year!</td></tr></table>\n\n<sub>_You can view [your badges on your Steem Board](https://steemitboard.com/@ajose01) and compare to others on the [Steem Ranking](http://steemitboard.com/ranking/index.php?name=ajose01)_</sub>\n\n\n**Do not miss the last post from @steemitboard:**\n<table><tr><td><a href=\"https://steemit.com/steemitboard/@steemitboard/steemitboard-witness-update-2019-05\"><img src=\"https://steemitimages.com/64x128/http://i.cubeupload.com/7CiQEO.png\"></a></td><td><a href=\"https://steemit.com/steemitboard/@steemitboard/steemitboard-witness-update-2019-05\">SteemitBoard - Witness Update</a></td></tr><tr><td><a href=\"https://steemit.com/steemmeetupaachen/@steemitboard/steemitboard-to-support-the-german-speaking-community-meetups\"><img src=\"https://steemitimages.com/64x128/https://cdn.steemitimages.com/DQmeoNp9iCaCfd2D6TqnWa3Aky2mU4Fm3xaSmjTM91YoNBS/image.png\"></a></td><td><a href=\"https://steemit.com/steemmeetupaachen/@steemitboard/steemitboard-to-support-the-german-speaking-community-meetups\">SteemitBoard to support the german speaking community meetups</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!",
      "json_metadata": "{\"image\":[\"https://steemitboard.com/img/notify.png\"]}"
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  "op": [
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    {
      "parent_author": "",
      "parent_permlink": "eosio",
      "author": "ajose01",
      "permlink": "4qpcsr-eos-signature-verification-with-elixir",
      "title": "EOS Signature verification with Elixir 😍",
      "body": "# EOS Signature Verification and ECDSA Tooling with Elixir\n\n![kelly-sikkema-1485308-unsplash.jpg](https://cdn.steemitimages.com/DQmX3cUD6T2ZEQDfPLzFVBf9hbMr8EvWoMTGjKRzFbPvFwX/kelly-sikkema-1485308-unsplash.jpg)\nPhoto by Kelly Sikkema on Unsplash\n\n\nElixir is one of my favorite programming languages. It's a wonderful backend languages and it really lends itself to glueing many of the backend processes that support synchronizing blockchain world to current infrastructures. A recent task I worked on requires verifying using an EOS signature to prove a request on our services. After plenty google-fu and reading through the [eosjs-ecc](https://github.com/EOSIO/eosjs-ecc) library here's what I came up with:\n\nFirst, to simplify things for the elixir side we'll grab the EOS signature in hex format vs. the standard `SIG_K1_` format. Doing so isn't too difficult with `eosjs-ecc`:\n```\nconst sig = ecc.Signature.sign('helloworld', privateKey).toHex();\n// or if you already have a signature\nconst sig = ecc.Signature.fromString('SIG_K1_....');\nsig.toHex();\n//sample hex:\n//'1f529f1b2b1373565975c7cfaf4e1217c5d24bbd26ebab6f9186c6c5cd26ad1b004b4f6d329f4e1ed2e5ee2bbf60d99ce4ef8ee4726699580c45c31ddff227821b'\n```\n\nThe signature hex is what we'll use below. Everything else is in the standard form, i.e.:\n\n```\ndefmodule EOSClient.KeyTool do\n  use Bitwise\n\n  def address_match?(eos_pub, msg, signature_hex) do\n    {:ok, recovered_pub} = recover_eos_pub(msg, signature_hex)\n    eos_pub == recovered_pub\n  end\n\n  def recover_eos_pub(msg, eos_signature) do\n    msg_hash = :crypto.hash(:sha256, msg)\n\n    # Here R, S are the same as ETH. V for EOS is found at the beginning of the\n    # hash\n    {r, s, v} = destructure_sig(eos_signature)\n    signature = BitHelper.pad(:binary.encode_unsigned(r), 32) <> BitHelper.pad(:binary.encode_unsigned(s), 32)\n\n    # Calculate i\n    # https://github.com/EOSIO/eosjs-ecc/blob/master/src/signature.js#L109\n    i = (v - 27) &&& 3\n    IO.inspect [\"i\", i]\n\n    case :libsecp256k1.ecdsa_recover_compact(msg_hash, signature, :compressed, i) do\n      {:ok, pub} ->\n        {:ok, Base.encode16(pub, case: :lower)\n              |> pub_hex_to_eos}\n      {:error, err} ->\n        {:error, err}\n    end\n  end\n\n  def destructure_sig(sig) do\n    {\n      String.slice(sig, 2, 64)\n      |> EthClient.Hex.decode_hex\n      |> :binary.decode_unsigned,\n      String.slice(sig, 66,64)\n      |> EthClient.Hex.decode_hex\n      |> :binary.decode_unsigned,\n      String.slice(sig, 0, 2)\n      |> EthClient.Hex.decode_hex\n      |> :binary.decode_unsigned\n    }\n  end\n\n  def eth_to_eos_sig(eth_hex) do\n    {sig, pad} =\n      eth_hex\n      |> String.slice(2..-1)\n      |> String.split_at(-2)\n\n    {int, _} = Integer.parse(pad, 16)\n\n    prefix = Integer.to_string(int + 4, 16)\n    raw_sig = prefix <> sig\n    \"SIG_K1_\" <> check_encode(raw_sig, \"K1\")\n  end\n\n  def pub_hex_to_eos(pubkey, key_type \\\\ nil) do\n    IO.inspect pubkey\n    pub_bin = pubkey\n              |> Base.decode16!(case: :lower)\n\n\n    check = case key_type do\n      nil -> [pub_bin]\n      key -> [pub_bin, key]\n    end\n\n    check_bin =\n      check\n      |> :erlang.iolist_to_binary\n\n    checksum =\n        hash(check_bin, :ripemd160)\n        |> :binary.part(0, 4)\n\n    \"EOS\" <> EthClient.Base58.encode(pub_bin <> checksum)\n  end\n\n\n  def check_encode(key, key_type \\\\ nil) do\n    bin = key\n          |> Base.decode16!(case: :lower)\n\n    check = case key_type do\n      nil -> [bin]\n      key -> [bin, key]\n    end\n\n    check_bin =\n      check\n      |> :erlang.iolist_to_binary\n\n    checksum =\n        hash(check_bin, :ripemd160)\n        |> :binary.part(0, 4)\n\n    EthClient.Base58.encode(bin <> checksum)\n  end\n\n  def hash(data, algorithm) do\n    :crypto.hash(algorithm, data)\n  end\n\nend\n```\n\nThere's some helpers along with this that I had written before for Ethereum sig validation. Since it's the same encryption under the hood, those work here as well. (Yes I should rename these).\n\nHex helper\n```\ndefmodule EthClient.Hex do\n  @moduledoc \"\"\"\n  Helpers for Compound to encode and decode to Ethereum's\n  hex format.\n  \"\"\"\n\n  require Integer\n\n  @spec encode_hex(binary()) :: String.t\n  def encode_hex(hex), do: \"0x\" <> Base.encode16(hex, case: :lower) # TODO: This should be shorten for odd length strings?\n\n  @spec decode_hex(String.t) :: binary()\n  def decode_hex(\"0x\" <> hex_data), do: decode_hex(hex_data)\n  def decode_hex(hex_data) when Integer.is_odd(byte_size(hex_data)), do: decode_hex(\"0\" <> hex_data)\n  def decode_hex(hex_data) do\n    Base.decode16!(hex_data, case: :mixed)\n  end\n\n  @spec maybe_decode_hex(String.t | nil) :: binary() | nil\n  def maybe_decode_hex(nil), do: nil\n  def maybe_decode_hex(hex), do: decode_hex(hex)\n\n  @spec maybe_decode_hex_int(String.t | nil) :: integer() | nil\n  def maybe_decode_hex_int(hex) do\n    case maybe_decode_hex(hex) do\n      nil -> nil\n      bin -> :binary.decode_unsigned(bin)\n    end\n  end\nend\n```\nBase58 helper:\n```\ndefmodule EthClient.Base58 do\n  @alphabet '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'\n\n  def encode(data, hash \\\\ \"\")\n\n  def encode(data, hash) when is_binary(data) do\n    encode_zeros(data) <> encode(:binary.decode_unsigned(data), hash)\n  end\n\n  def encode(0, hash), do: hash\n\n  def encode(data, hash) do\n    character = <<Enum.at(@alphabet, rem(data, 58))>>\n    encode(div(data, 58), character <> hash)\n  end\n\n  defp encode_zeros(data) do\n    <<Enum.at(@alphabet, 0)>>\n    |> String.duplicate(leading_zeros(data))\n  end\n\n  defp leading_zeros(data) do\n    :binary.bin_to_list(data)\n    |> Enum.find_index(&(&1 != 0))\n  end\nend\n```\n\nMost of the steps to get here have been derived from reading some excellent blog posts on Bitcoin, and reading through some elixir crypto libraries that deal with either bitcoin or ethereum. I've just managed to glue them together to apply them to EOSIO. 🚀\n\nSome of the posts and/or repos that are helpful (and many more that I lost the chrome tab to):\nhttps://blog.lelonek.me/how-to-calculate-bitcoin-address-in-elixir-68939af4f0e9\nhttps://github.com/KamilLelonek/ex_wallet\nhttp://www.petecorey.com/blog/2018/01/08/bitcoins-base58check-in-pure-elixir/\nhttps://github.com/exthereum/exth_crypto/blob/master/lib/signature/signature.ex\n\nUntil next time!\n\nAngel\n[twitter](https://twitter.com/ajose01)\n[sense.chat](https://my.sense.chat/amazingangel)",
      "json_metadata": "{\"tags\":[\"eosio\",\"elixir\",\"ecdsa\",\"ecc\",\"libsecp256k1\"],\"image\":[\"https://cdn.steemitimages.com/DQmX3cUD6T2ZEQDfPLzFVBf9hbMr8EvWoMTGjKRzFbPvFwX/kelly-sikkema-1485308-unsplash.jpg\"],\"links\":[\"https://github.com/EOSIO/eosjs-ecc\",\"https://blog.lelonek.me/how-to-calculate-bitcoin-address-in-elixir-68939af4f0e9\",\"https://github.com/KamilLelonek/ex_wallet\",\"http://www.petecorey.com/blog/2018/01/08/bitcoins-base58check-in-pure-elixir/\",\"https://github.com/exthereum/exth_crypto/blob/master/lib/signature/signature.ex\",\"https://twitter.com/ajose01\",\"https://my.sense.chat/amazingangel\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}"
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    {
      "parent_author": "",
      "parent_permlink": "elixir",
      "author": "ajose01",
      "permlink": "eos-signature-verification-with-elixir",
      "title": "EOS Signature verification with Elixir 😍",
      "body": "# EOS Signature Verification and ECDSA Tooling with Elixir\n\n![kelly-sikkema-1485308-unsplash.jpg](https://cdn.steemitimages.com/DQmX3cUD6T2ZEQDfPLzFVBf9hbMr8EvWoMTGjKRzFbPvFwX/kelly-sikkema-1485308-unsplash.jpg)\nPhoto by Kelly Sikkema on Unsplash\n\n\nElixir is one of my favorite programming languages. It's a wonderful backend languages and it really lends itself to glueing many of the backend processes that support synchronizing blockchain world to current infrastructures. A recent task I worked on requires verifying using an EOS signature to prove a request on our services. After plenty google-fu and reading through the [eosjs-ecc](https://github.com/EOSIO/eosjs-ecc) library here's what I came up with:\n\nFirst, to simplify things for the elixir side we'll grab the EOS signature in hex format vs. the standard `SIG_K1_` format. Doing so isn't too difficult with `eosjs-ecc`:\n```\nconst sig = ecc.Signature.sign('helloworld', privateKey).toHex();\n// or if you already have a signature\nconst sig = ecc.Signature.fromString('SIG_K1_....');\nsig.toHex();\n//sample hex:\n//'1f529f1b2b1373565975c7cfaf4e1217c5d24bbd26ebab6f9186c6c5cd26ad1b004b4f6d329f4e1ed2e5ee2bbf60d99ce4ef8ee4726699580c45c31ddff227821b'\n```\n\nThe signature hex is what we'll use below. Everything else is in the standard form, i.e.:\n\n```\ndefmodule EOSClient.KeyTool do\n  use Bitwise\n\n  def address_match?(eos_pub, msg, signature_hex) do\n    {:ok, recovered_pub} = recover_eos_pub(msg, signature_hex)\n    eos_pub == recovered_pub\n  end\n\n  def recover_eos_pub(msg, eos_signature) do\n    msg_hash = :crypto.hash(:sha256, msg)\n\n    # Here R, S are the same as ETH. V for EOS is found at the beginning of the\n    # hash\n    {r, s, v} = destructure_sig(eos_signature)\n    signature = BitHelper.pad(:binary.encode_unsigned(r), 32) <> BitHelper.pad(:binary.encode_unsigned(s), 32)\n\n    # Calculate i\n    # https://github.com/EOSIO/eosjs-ecc/blob/master/src/signature.js#L109\n    i = (v - 27) &&& 3\n    IO.inspect [\"i\", i]\n\n    case :libsecp256k1.ecdsa_recover_compact(msg_hash, signature, :compressed, i) do\n      {:ok, pub} ->\n        {:ok, Base.encode16(pub, case: :lower)\n              |> pub_hex_to_eos}\n      {:error, err} ->\n        {:error, err}\n    end\n  end\n\n  def destructure_sig(sig) do\n    {\n      String.slice(sig, 2, 64)\n      |> EthClient.Hex.decode_hex\n      |> :binary.decode_unsigned,\n      String.slice(sig, 66,64)\n      |> EthClient.Hex.decode_hex\n      |> :binary.decode_unsigned,\n      String.slice(sig, 0, 2)\n      |> EthClient.Hex.decode_hex\n      |> :binary.decode_unsigned\n    }\n  end\n\n  def eth_to_eos_sig(eth_hex) do\n    {sig, pad} =\n      eth_hex\n      |> String.slice(2..-1)\n      |> String.split_at(-2)\n\n    {int, _} = Integer.parse(pad, 16)\n\n    prefix = Integer.to_string(int + 4, 16)\n    raw_sig = prefix <> sig\n    \"SIG_K1_\" <> check_encode(raw_sig, \"K1\")\n  end\n\n  def pub_hex_to_eos(pubkey, key_type \\\\ nil) do\n    IO.inspect pubkey\n    pub_bin = pubkey\n              |> Base.decode16!(case: :lower)\n\n\n    check = case key_type do\n      nil -> [pub_bin]\n      key -> [pub_bin, key]\n    end\n\n    check_bin =\n      check\n      |> :erlang.iolist_to_binary\n\n    checksum =\n        hash(check_bin, :ripemd160)\n        |> :binary.part(0, 4)\n\n    \"EOS\" <> EthClient.Base58.encode(pub_bin <> checksum)\n  end\n\n\n  def check_encode(key, key_type \\\\ nil) do\n    bin = key\n          |> Base.decode16!(case: :lower)\n\n    check = case key_type do\n      nil -> [bin]\n      key -> [bin, key]\n    end\n\n    check_bin =\n      check\n      |> :erlang.iolist_to_binary\n\n    checksum =\n        hash(check_bin, :ripemd160)\n        |> :binary.part(0, 4)\n\n    EthClient.Base58.encode(bin <> checksum)\n  end\n\n  def hash(data, algorithm) do\n    :crypto.hash(algorithm, data)\n  end\n\nend\n```\n\nThere's some helpers along with this that I had written before for Ethereum sig validation. Since it's the same encryption under the hood, those work here as well. (Yes I should rename these).\n\nHex helper\n```\ndefmodule EthClient.Hex do\n  @moduledoc \"\"\"\n  Helpers for Compound to encode and decode to Ethereum's\n  hex format.\n  \"\"\"\n\n  require Integer\n\n  @spec encode_hex(binary()) :: String.t\n  def encode_hex(hex), do: \"0x\" <> Base.encode16(hex, case: :lower) # TODO: This should be shorten for odd length strings?\n\n  @spec decode_hex(String.t) :: binary()\n  def decode_hex(\"0x\" <> hex_data), do: decode_hex(hex_data)\n  def decode_hex(hex_data) when Integer.is_odd(byte_size(hex_data)), do: decode_hex(\"0\" <> hex_data)\n  def decode_hex(hex_data) do\n    Base.decode16!(hex_data, case: :mixed)\n  end\n\n  @spec maybe_decode_hex(String.t | nil) :: binary() | nil\n  def maybe_decode_hex(nil), do: nil\n  def maybe_decode_hex(hex), do: decode_hex(hex)\n\n  @spec maybe_decode_hex_int(String.t | nil) :: integer() | nil\n  def maybe_decode_hex_int(hex) do\n    case maybe_decode_hex(hex) do\n      nil -> nil\n      bin -> :binary.decode_unsigned(bin)\n    end\n  end\nend\n```\nBase58 helper:\n```\ndefmodule EthClient.Base58 do\n  @alphabet '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'\n\n  def encode(data, hash \\\\ \"\")\n\n  def encode(data, hash) when is_binary(data) do\n    encode_zeros(data) <> encode(:binary.decode_unsigned(data), hash)\n  end\n\n  def encode(0, hash), do: hash\n\n  def encode(data, hash) do\n    character = <<Enum.at(@alphabet, rem(data, 58))>>\n    encode(div(data, 58), character <> hash)\n  end\n\n  defp encode_zeros(data) do\n    <<Enum.at(@alphabet, 0)>>\n    |> String.duplicate(leading_zeros(data))\n  end\n\n  defp leading_zeros(data) do\n    :binary.bin_to_list(data)\n    |> Enum.find_index(&(&1 != 0))\n  end\nend\n```\n\nMost of the steps to get here have been derived from reading some excellent blog posts on Bitcoin, and reading through some elixir crypto libraries that deal with either bitcoin or ethereum. I've just managed to glue them together to apply them to EOSIO. 🚀\n\nSome of the posts and/or repos that are helpful (and many more that I lost the chrome tab to):\nhttps://blog.lelonek.me/how-to-calculate-bitcoin-address-in-elixir-68939af4f0e9\nhttps://github.com/KamilLelonek/ex_wallet\nhttp://www.petecorey.com/blog/2018/01/08/bitcoins-base58check-in-pure-elixir/\nhttps://github.com/exthereum/exth_crypto/blob/master/lib/signature/signature.ex\n\nUntil next time!\n\nAngel\n[twitter](https://twitter.com/ajose01)\n[sense.chat](https://my.sense.chat/amazingangel)",
      "json_metadata": "{\"tags\":[\"elixir\",\"eosio\",\"ecdsa\",\"ecc\",\"libsecp256k1\"],\"image\":[\"https://cdn.steemitimages.com/DQmX3cUD6T2ZEQDfPLzFVBf9hbMr8EvWoMTGjKRzFbPvFwX/kelly-sikkema-1485308-unsplash.jpg\"],\"links\":[\"https://github.com/EOSIO/eosjs-ecc\",\"https://blog.lelonek.me/how-to-calculate-bitcoin-address-in-elixir-68939af4f0e9\",\"https://github.com/KamilLelonek/ex_wallet\",\"http://www.petecorey.com/blog/2018/01/08/bitcoins-base58check-in-pure-elixir/\",\"https://github.com/exthereum/exth_crypto/blob/master/lib/signature/signature.ex\",\"https://twitter.com/ajose01\",\"https://my.sense.chat/amazingangel\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}"
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      "author": "partiko",
      "permlink": "partiko-re-ajose01-securing-messages-using-eos-and-ecdh-and-aes-20190225t223842089z",
      "title": "",
      "body": "Hello @ajose01! 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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      "author": "steemitboard",
      "permlink": "steemitboard-notify-ajose01-20190212t213832000z",
      "title": "",
      "body": "Congratulations @ajose01! You have completed the following achievement on the Steem blockchain and have been rewarded with new badge(s) :\n\n<table><tr><td>https://steemitimages.com/60x60/http://steemitboard.com/notifications/firstvote.png</td><td>You made your First Vote</td></tr>\n</table>\n\n<sub>_[Click here to view your Board](https://steemitboard.com/@ajose01)_</sub>\n<sub>_If you no longer want to receive notifications, reply to this comment with the word_ `STOP`</sub>\n\n\n\n> Support [SteemitBoard's project](https://steemit.com/@steemitboard)! **[Vote for its witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1)** and **get one more award**!",
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{
  "trx_id": "b81d971f217871b1a866a5306ca5d0707a4bca18",
  "block": 29268084,
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      "parent_author": "",
      "parent_permlink": "eos",
      "author": "ajose01",
      "permlink": "securing-messages-using-eos-and-ecdh-and-aes",
      "title": "Securing messages using EOS (and ECDH and AES)",
      "body": "![Locks](https://cdn.steemitimages.com/DQmYb1GYUm6iRAksGi3acW36fVwfs6GQahioZjoMMSmuME3/image.png)\n[Photo - @neonbrand via unsplash](https://unsplash.com/@neonbrand)\n\n# Securing messages using EOS (and ECDH and AES)\n\n_Disclaimer: I'm sharing as I'm learning... please use at your own risk, or better yet share in comments how to improve! Also, I will use terms as seed / password loosely, to illustrate the process._\n\nCan we encrypt communication between two EOS users using the private / public keys already in our possession? YES! Well... with some caveats. ECC in itself is not an encryption algorithm. In EOS and other blockchains it is used to sign transactions, but not to obscure what is being signed. However, it can be leveraged to encrypt communications if we take a couple steps.\n\n## Preface\nWe are going to do this first the long way, to learn a bit about the process. We'll finish with a simpler (and quicker) way using some existing EOS tooling (Skip to Step 5 if you want to just see that). This is in Javascript, so here's what we'll need:\n```Javascript\nconst EC = require('elliptic').ec;\nconst hkdf = require('futoin-hkdf');\nconst aesjs = require('aes-js');\nconst ecc = require('eosjs-ecc');\n```\nWe'll also generate some EOS keys for ourselves:\n```Javascript\nlet eosPk1 = await PrivateKey.randomKey();\nlet eosPk2 = await PrivateKey.randomKey()\nlet eosPub1 = ecc.privateToPublic(eosPk1);\nlet eosPub2 = ecc.privateToPublic(eosPk2);\nconsole.log(\"EOS USER 1: \", eosPub1);\nconsole.log(\"EOS USER 2: \", eosPub2);\n```\n\n## Step 1 - Generate a shared encryption seed.\n\nIn order to encrypt our communications, we would usually need an encryption seed (for us encryption noobs, think something like a password) that we use to secure our communication. As long as both parties know the password, we can decrypt our message. The trick is having a common seed / pass that we never have to communicate to the other party. In crypto world, we already have enough keys to worry about! How can we accomplish this?\n\nEnter [ECDH](https://en.wikipedia.org/wiki/Elliptic-curve_Diffie%E2%80%93Hellman). Using this protocol, we can use our EOS (or any ECC) private key and the other parties EOS public key.\n\nHere's the process assuming we are EOS user 1:\n```Javascript\n// EOS KEY1 - Generating shared key\nconsole.log(\"Scenario 1. EOS User 1 generating shared key via own PK, and User 2 public key\\n\")\nconst key1 = ec.keyFromPrivate(eosPk1.toBuffer());\n// We simulate not knowing the other parties PK.\nlet eosPubBuffer2 = ecc.PublicKey(eosPub2).toBuffer();\nconst ecpub2 = ec.keyFromPublic(eosPubBuffer2);\nconst pub2 = ecpub2.getPublic();\nconsole.log(\"PubKey2: \", pub2);\nconst shared1 = key1.derive(pub2).toString(16);\nconsole.log(\"Shared key derived by EOS USER 1: \", shared1);\n```\nWe'd do the reverse for the other user, and we would end up generating the same shared key #winning.\n\n## Step 2 - Convert our shared key to a valid AES key / encryption seed.\n\nOur shared key here needs to be converted to a seed we can use with AES. To do that we use a Key Derivation Function, in this case [HKDF](https://en.wikipedia.org/wiki/HKDF).\n\n```Javascript\n// Convert shared key to AES valid key\nlet key = hkdf(shared1, 16)\n```\n\n## Step 3 - Encrypt our message via AES\n\nNow that we have a valid key to use for AES encryption, we can finally get to making our messages secret.\n```Javascript\nlet text = \"Let's encrypt... secret taco meetup!\"\nconsole.log(\"Test string: \", text)\nlet textBytes = aesjs.utils.utf8.toBytes(text);\nlet aesCtr = new aesjs.ModeOfOperation.ctr(key);\nlet encryptedBytes = aesCtr.encrypt(textBytes);\n// We convert to hex to make it easy to transmit as text\nlet encryptedHex = aesjs.utils.hex.fromBytes(encryptedBytes);\nconsole.log(\"Encrypted text as it would be transmitted:\\n\", encryptedHex);\n// Encrypted text as it would be transmitted:\n// 9c27303372372cda33c70441f0960fde77fff9b118ddc64f2bcf027f3823da142f5e6baa\n\n```\nHere we could have used a nonce or a counter to add a bit more security to the messages we are sending or receiving.\n```Javascript\n// The counter is optional, and if omitted will begin at 1\nlet aesCtr = new aesjs.ModeOfOperation.ctr(key, new aesjs.Counter(5));\n```\n\n## Step 4 - Decrypting message\n\nThe other user would have been able to generate the same shared key using the steps above. On receiving this message, they would now use that key to decrypt the message.\n```Javascript\n// Time to decrypt\nconsole.log(\"Now going to decrypt...:\\n\", encryptedHex);\n\nlet encryptedBytes2 = aesjs.utils.hex.toBytes(encryptedHex);\n// Use same shared key to decrypt\nlet aesCtr2 = new aesjs.ModeOfOperation.ctr(key);\nlet decryptedBytes = aesCtr2.decrypt(encryptedBytes2);\nlet decryptedText = aesjs.utils.utf8.fromBytes(decryptedBytes);\nconsole.log(\"Decrypted text result: \", decryptedText);\n//Now going to decrypt...:\n// 9c27303372372cda33c70441f0960fde77fff9b118ddc64f2bcf027f3823da142f5e6baa\n//Decrypted text result:  Let's encrypt... secret taco meetup!\n```\nWooohooo! We have communicated without letting prying eyes know what we wrote. 🌮🌮🌮\n\nThe full code to test this out is [here](https://github.com/ajose01/eos_ecdh/blob/master/eosEncrypt.js). Feel free to give it a try.\n\n## Step 5 - EOS tooling makes it (somewhat) simpler.\nGoing through the steps above was a good exercise for me to learn how things are working under the hood, especially because I am interested in learning more about cryptography. However, there is a [simpler way](https://github.com/EOSIO/eosjs-ecc/issues/19) to do this via `eosjs-ecc`. Let's give it a whirl:\n\n###### First we encrypt using the same keys generated earlier.\n```Javascript\n// Message\nlet message = \"Tacos via EOS\";\nconsole.log(\"Message to encrypt: \", message);\n\n// EOS KEY1 - Encrypting\nconsole.log(\"EOS User 1 encrypting the message\\n\")\nlet encryptedMessage = ecc.Aes.encrypt(eosPk1, eosPub2, message)\nlet nonce = encryptedMessage.nonce.toString();\nlet checksum = encryptedMessage.checksum;\nlet messageHex = encryptedMessage.message.toString('hex');\nconsole.log(\"Items to send to user 2:\\n\", messageHex,nonce,checksum);\n// Items to send to user 2:\n// 28e2fa0c4bc8a339a5b7e096883e51fa 101379311011030238 1143290642\n```\nYou'll notice that we will have to send over some additional items with the user aside from the message: nonce and checksum.\n###### Now we can decrypt with the other user.\n```Javascript\n// EOS KEY2 - Decrypting the message\nconsole.log(\"EOS User 2 decrypting the message\\n\");\nlet messageBuffer = Buffer.from(messageHex, 'hex');\nlet decryptedMessageBuffer = ecc.Aes.decrypt(eosPk2, eosPub1, nonce, messageBuffer, checksum);\nlet decryptedMessage = decryptedMessageBuffer.toString();\nconsole.log(\"decrypted message: \", decryptedMessage);\nconsole.log(\"message match?: \", (message == decryptedMessage));\n//decrypted message:  Tacos via EOS\n//message match?:  true\n```\nThis takes care of generating the shared keys under the hood, so it let's us write less code. You can see or download the code [here](https://github.com/ajose01/eos_ecdh/blob/master/eosOnlyEncrypt.js).\n\n## Conclusion\nLearning the tools that are already available is super valuable. It opens up different options on dapp design, encryption and communications. I hope this was post was helpful 🙏\n\nAngel Jose / @ajose01 - I poke at the blockchain with the [Sense team](https://makesense.com/), host [EOS meetups](https://www.meetup.com/EOS-Dapp-Development-Meetup/), learn and share about crypto and eat 🌮🌮.\n* [sense.chat](https://sense.chat)\n* [steemit](https://steemit.com/@ajose01/)\n* [twitter](https://twitter.com/ajose01)\n* [youtube](https://www.youtube.com/channel/UC3TaA9_obCreXZrhECmKs2Q)\n* [past meetups](https://www.youtube.com/channel/UCN2TfO4zmz1PaezhBMtZXrw/videos)\n* [github](https://github.com/ajose01)",
      "json_metadata": "{\"tags\":[\"eos\",\"blockchain\",\"encryption\",\"tutorial\",\"dapps\"],\"users\":[\"ajose01\"],\"image\":[\"https://cdn.steemitimages.com/DQmYb1GYUm6iRAksGi3acW36fVwfs6GQahioZjoMMSmuME3/image.png\"],\"links\":[\"https://unsplash.com/@neonbrand\",\"https://en.wikipedia.org/wiki/Elliptic-curve_Diffie%E2%80%93Hellman\",\"https://en.wikipedia.org/wiki/HKDF\",\"https://github.com/ajose01/eos_ecdh/blob/master/eosEncrypt.js\",\"https://github.com/EOSIO/eosjs-ecc/issues/19\",\"https://github.com/ajose01/eos_ecdh/blob/master/eosOnlyEncrypt.js\",\"https://makesense.com/\",\"https://www.meetup.com/EOS-Dapp-Development-Meetup/\",\"https://sense.chat\",\"https://steemit.com/@ajose01/\",\"https://twitter.com/ajose01\",\"https://www.youtube.com/channel/UC3TaA9_obCreXZrhECmKs2Q\",\"https://www.youtube.com/channel/UCN2TfO4zmz1PaezhBMtZXrw/videos\",\"https://github.com/ajose01\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}"
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      "author": "cryptolions",
      "permlink": "re-ajose01-scatter-and-the-jungle-testnet-20181204t100326492z",
      "title": "",
      "body": "@@ -75,10 +75,4 @@\n 4k90\n-&t=27s\n",
      "json_metadata": "{\"tags\":[\"eos\"],\"image\":[\"https://img.youtube.com/vi/6Yf-cHg4k90/0.jpg\"],\"links\":[\"https://www.youtube.com/watch?v=6Yf-cHg4k90\"],\"app\":\"steemit/0.1\"}"
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      "author": "cryptolions",
      "permlink": "re-ajose01-scatter-and-the-jungle-testnet-20181204t100326492z",
      "title": "",
      "body": "This video tutorial may help too:  https://www.youtube.com/watch?v=6Yf-cHg4k90&t=27s",
      "json_metadata": "{\"tags\":[\"eos\"],\"image\":[\"https://img.youtube.com/vi/6Yf-cHg4k90/0.jpg\"],\"links\":[\"https://www.youtube.com/watch?v=6Yf-cHg4k90&t=27s\"],\"app\":\"steemit/0.1\"}"
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      "author": "ekkis",
      "permlink": "re-ajose01-eos-and-scatter-part-1-20180901t035853062z",
      "title": "",
      "body": "\"Step 2: You'll need to create an account and create an identity. Easiest way is to click on \"Play Around\"\"\n\nin Scatter? there's no such button or link there.  I've created an account on EOS via zeos and I can create an identity in Scatter but how do I bind the two together?",
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      "memo": "Hi, it looks like you're not voting for any witnesses. Witnesses help secure the Steem network. You should vote for some, at https://steemit.com/~witnesses, or by pressing 'Vote for witnesses' in the Steemit sidebar (top right corner). I'm a bot."
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      "permlink": "re-ajose01-eos-and-scatter-part-1-20180727t070234271z",
      "title": "",
      "body": "Hello ajose01,\n   After scatter.getIndentity, does it returns the imported public key from the created identity in scatter or something else ?",
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      "title": "",
      "body": "Good article. I have one question. Currently i don't have eos token. After mainnet launch, I have to create account. Some KYC will be required? What will I have to do this?",
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      "permlink": "re-ajose01-ethereum-addresses-vs-eos-accounts-a-long-ish-explainer-20180607t010811344z",
      "title": "",
      "body": "This is great info! Thanks! I upvoted 100%.\nI am friends with Gustavo and Kirill. We are neighbors. I hope we cross paths soon!\nCheck out my first blog here. Thanks!\nhttps://steemit.com/fundinggym/@fundinggym/iprn4yf1",
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      "title": "",
      "body": "Hola amigos! 🇲🇽👋🇻🇪",
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      "title": "",
      "body": "Hola amigos! 🇲🇽",
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      "body": "Great post @ajose01. Greetings from #EOSVenezuela \n\nhttps://s33.postimg.cc/nnqmdgzwf/instagram_format_32.jpg",
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      "permlink": "re-ajose01-ethereum-addresses-vs-eos-accounts-a-long-ish-explainer-20180606t075200104z",
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      "body": "thats gives a good understanding why generating key pairs wasnt working on scatter & always gave the error.. \"no account\"",
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      "permlink": "re-ajose01-ethereum-addresses-vs-eos-accounts-a-long-ish-explainer-20180606t062458024z",
      "title": "",
      "body": "Check out https://steemit.com/@a-0-0",
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      "parent_permlink": "eos",
      "author": "ajose01",
      "permlink": "ethereum-addresses-vs-eos-accounts-a-long-ish-explainer",
      "title": "Ethereum Addresses vs. EOS Accounts - A (long-ish) explainer",
      "body": "![currencies.jpg](https://cdn.steemitimages.com/DQmbdKRZyLoTbSncex8BsoqbuvArcX1yS9Qmf4S9HD7HNSu/steve-johnson-605822-unsplash.jpg)\nPhoto by [Steve Johnson](https://unsplash.com/photos/WVUrbhWtRNM?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com/search/photos/currency?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText)\n## Learning how to use your EOS account starts with understanding your Ethereum address\n\nWelcome to your new EOS currency. We are no longer bound to those erc-20 EOS tokens of that thing called Ethereum. Now before we can start trading, sending, using, voting and all the other things that EOS will bring us we have to discuss this thing called our EOS account.\n\nIt's important that we understand some fundamental differences on how EOS handles interacting with the blockchain in contrast to Ethereum. To understand this, let's discuss Ethereum 'accounts' first.\n\n#### Ethereum\nThere are NO accounts. Huh? Yup. No accounts. There are only records of public key transactions. And all you need to access your tokens, contracts, ethereum is the corresponding private key to sign for a public key (also known as your ETH address). How does this magic work?\n\nWithout going into all the crypto details, an encryption algorithm will generate key pair combos that can be used to validate information. So in simple terms, a private key \"abcd\" will always generate the public key \"0xangelsEthAddress\". So if I generate a transaction on ethereum, without knowing my private key we can run the transaction against the signature and it will spit out my public key... thus validating that it was indeed me who generated that transaction.\n\n```\n// PSEUDO CODE:\nmyPrivateKey = \"abcd\"\ntransactionData = \"Send 10 tokens to 'theOtherAngel'\"\nsignature = encryptFunction(transactionData, myPrivateKey)\n// This generates a signature. \"0xThisIsASignature\"\n\ntransmitToEthNodeFunction(transactionData, signature) // Notice that my private key never leaves my possession. Only the data and signature\n\n```\n\nIf this `transactionData` and `signature` is received then we can run a verification function on this data, without ever knowing the private key of the user.\n\n```\npublicAddress = recoverPublicAddress(transactionData, signture)\n// publicAddress > \"0xangelsEthAddress\"\n\n```\n\nThis is why tools like Metamask or a Ledger Nano can create \"accounts\" for you on the fly. Because all they are doing is creating key pairs as shown above that can be used to sign transactions. All that ever leaves the \"wallet\" are the signatures and the transaction data, thus keeping your private keys secure.\n\n#### EOS\n\nA key distinction in EOS is that accounts ARE created. A private and public key pair can't do anything on their own without being assigned to an account. This is a very important distinction. It changes how 'wallets' can be used.\n\nWhen a new EOS account are created, the _public_ keys for that account are specified with the respective permission levels. The two basic requirements are the Owner and Active keys.\n\nEOS public key pairs are generated in a similar fashion to Eth pairs, with the difference that the algorithm produces EOS prefixed public keys. Here is a sample generated from [this site](https://nadejde.github.io/eos-token-sale/)\n![Screen Shot 2018-06-04 at 7.48.53 PM.png](https://cdn.steemitimages.com/DQmctBL8qa1nWsbZbc7EcAT68tmfpin6s4aejkZg9drDU9M/Screen%20Shot%202018-06-04%20at%207.48.53%20PM.png)\n\nIf you registered your EOS tokens (_remember that thing you were supposed to do before June 1st_) you had to take a few steps.\n\nStep 1 - Generate a public / private EOS keypair (like the sample above)\n\nStep 2 - Use your ethereum account which holds your EOS and register the _public_ key you generated with the contract. (EOS5f9...HrB1)\n\nWhy? So that when the final snapshot was taken and the new EOS mainnet is launched, an EOS account can be created automatically for you with your token balance and with your Owner key set to the one you submitted in the registration process.\n\nThat's why it is important to have saved your private key. That's how we'll be able to sign transactions and validate that it is indeed you doing so. A transaction can be anything from transferring tokens, interacting with smart contracts or voting for Block Producers.\n\nYour EOS private key _IS NOT_ the same private key that your Metamask or Ledger Nano or XYZ wallet was using. It is the private key that was generated when you went through the steps of obtaining it in your registration process.\n\nThis leads us to another sub-topic:\n\n###### EOS Wallets\n\nCurrently I've only seen the cleos cli which is very unlikely to be used by end-users OR something like [Scatter](https://scatter-eos.com/) (chrome / firefox extension). To use any wallet CLI / Extension / Mobile with your EOS account you _WILL_ need to import your private key. Why? Because the only way to interact with the account that was assigned to you during the Mainnet launch is to have access to the private key that corresponds to your Owner public key.\n\nWhy can't Scatter or XYZ wallet just generate a public / private key pair for me like Metamask? Metamask doesn't ask me to import keys! Actually Scatter _can_... But they wouldn't be assigned to ANY account, so they'd be useless.\n\nThis isn't a limitation of Scatter or any other wallet that comes around. It's a difference in blockchain design.... EOS vs. Ethereum. Although it may seem like an inconvenience, dig around a bit and you'll see how having accounts with permission levels is an advantage and opens up different [dApp design possibilities](https://github.com/EOSIO/Documentation/blob/master/TechnicalWhitePaper.md#named-permission-levels).\n\nSo what does this mean? That in order to access your initial account a level of trust will be required. Whatever wallet you choose to use, you'll have to import your private key so that it can sign transactions on your behalf. The most reliable / trustworthy source would be to just go ahead and use the EOS provided [cleos cli](https://github.com/EOSIO/eos/wiki/Programs-&-Tools#cleos). That will require a level of bootstrapping that most end-users will not go through.\n\nThe alternative? Be patient and wait for the EOS community to start giving validation to trustworthy wallets. So far, the only one that has some community trust behind it is [Scatter](https://scatter-eos.com/). I'm a fan, but even then there is no harm in waiting a few and letting the dust settle.\n\n### Summary\n\nEOS is exciting, but it's also new. Keep your private key safe, and only import it into a wallet that you feel 100% comfortable with. Take some time to understand how EOS accounts work and what you need to have ready to go when the mainnet launches 🚀!\n\n-- [@ajose01](https://steemit.com/@ajose01/)\n\nhttps://ether.dm/0x2794d1321035f0ef2faad52e21cad2ef82362835\n\nHelpful links:\nhttps://github.com/EOSIO/Documentation/blob/master/TechnicalWhitePaper.md#accounts\nhttps://hackernoon.com/eos-101-getting-started-with-eos-part-2-2afbce4a8a05",
      "json_metadata": "{\"tags\":[\"eos\",\"scatter\",\"blockchain\",\"ethereum\",\"dapps\"],\"image\":[\"https://cdn.steemitimages.com/DQmbdKRZyLoTbSncex8BsoqbuvArcX1yS9Qmf4S9HD7HNSu/steve-johnson-605822-unsplash.jpg\",\"https://cdn.steemitimages.com/DQmctBL8qa1nWsbZbc7EcAT68tmfpin6s4aejkZg9drDU9M/Screen%20Shot%202018-06-04%20at%207.48.53%20PM.png\"],\"links\":[\"https://unsplash.com/photos/WVUrbhWtRNM?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText\",\"https://unsplash.com/search/photos/currency?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText\",\"https://nadejde.github.io/eos-token-sale/\",\"https://scatter-eos.com/\",\"https://github.com/EOSIO/Documentation/blob/master/TechnicalWhitePaper.md#named-permission-levels\",\"https://github.com/EOSIO/eos/wiki/Programs-&-Tools#cleos\",\"https://steemit.com/@ajose01/\",\"https://ether.dm/0x2794d1321035f0ef2faad52e21cad2ef82362835\",\"https://github.com/EOSIO/Documentation/blob/master/TechnicalWhitePaper.md#accounts\",\"https://hackernoon.com/eos-101-getting-started-with-eos-part-2-2afbce4a8a05\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}"
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      "author": "steemitboard",
      "permlink": "steemitboard-notify-ajose01-20180606t015820000z",
      "title": "",
      "body": "Congratulations @ajose01! 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/voted.png)](http://steemitboard.com/@ajose01) Award for the number of upvotes received\n\n<sub>_Click on the badge to view your Board of Honor._</sub>\n<sub>_If you no longer want to receive notifications, reply to this comment with the word_ `STOP`</sub>\n\n\nTo support your work, I also upvoted your post!\n\n\n> Do you like [SteemitBoard's project](https://steemit.com/@steemitboard)? Then **[Vote for its witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1)** and **get one more award**!",
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      "permlink": "re-facer-re-ajose01-scatter-and-the-jungle-testnet-20180605t170243529z",
      "title": "",
      "body": "That's pending at the moment. Once the mainnet goes live, I'll dig in and write something for it :)",
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  "timestamp": "2018-06-05T09:16:24",
  "op": [
    "comment",
    {
      "parent_author": "ajose01",
      "parent_permlink": "scatter-and-the-jungle-testnet",
      "author": "leordev",
      "permlink": "re-ajose01-scatter-and-the-jungle-testnet-20180605t091622640z",
      "title": "",
      "body": "Nice job @ajose01! I'm going to utilize this post for mine! :D",
      "json_metadata": "{\"tags\":[\"eos\"],\"users\":[\"ajose01\"],\"app\":\"steemit/0.1\"}"
    }
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      "voter": "debraycodes",
      "author": "ajose01",
      "permlink": "scatter-and-the-jungle-testnet",
      "weight": 10000
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      "voter": "conceptskip",
      "author": "ajose01",
      "permlink": "scatter-and-the-jungle-testnet",
      "weight": 10000
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      "author": "ajose01",
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  "block": 23047514,
  "trx_in_block": 24,
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  "timestamp": "2018-06-05T05:25:36",
  "op": [
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    {
      "voter": "cybercodetwins",
      "author": "ajose01",
      "permlink": "scatter-and-the-jungle-testnet",
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    {
      "parent_author": "ajose01",
      "parent_permlink": "scatter-and-the-jungle-testnet",
      "author": "eosphere",
      "permlink": "re-ajose01-scatter-and-the-jungle-testnet-20180605t052435364z",
      "title": "",
      "body": "Great tutorial, and perfectly complements the 'EOS Voter' voting site we have published which currently connects to the Jungle Testnet - feel free to try it out with your newly created Jungle test account - details are all here https://steemit.com/eos/@eosphere/eos-voter-eos-voting-portal-with-scatter",
      "json_metadata": "{\"tags\":[\"eos\"],\"links\":[\"https://steemit.com/eos/@eosphere/eos-voter-eos-voting-portal-with-scatter\"],\"app\":\"steemit/0.1\"}"
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    {
      "parent_author": "ajose01",
      "parent_permlink": "scatter-and-the-jungle-testnet",
      "author": "facer",
      "permlink": "re-ajose01-scatter-and-the-jungle-testnet-20180605t052310208z",
      "title": "",
      "body": "great post!  do you know how to register account on mainnet?",
      "json_metadata": "{\"tags\":[\"eos\"],\"app\":\"steemit/0.1\"}"
    }
  ]
}

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      "voter": "facer",
      "author": "ajose01",
      "permlink": "scatter-and-the-jungle-testnet",
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  "op": [
    "vote",
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      "voter": "eosphere",
      "author": "ajose01",
      "permlink": "scatter-and-the-jungle-testnet",
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{
  "trx_id": "65f71bfce361c82a8edc8612750669b9c2f2f25b",
  "block": 23046636,
  "trx_in_block": 5,
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  "timestamp": "2018-06-05T04:41:39",
  "op": [
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    {
      "parent_author": "",
      "parent_permlink": "eos",
      "author": "ajose01",
      "permlink": "scatter-and-the-jungle-testnet",
      "title": "Scatter and the EOS JUNGLE (testnet)!",
      "body": "![lion.jpg](https://cdn.steemitimages.com/DQmejAq3dYv4cYbXQspKczaoGocRkcmeUnM5DieFVtbFPu2/lion.jpg)\n\n## Using Scatter with the Jungle EOS Testnet\n\nWe are oh so close to the EOS Mainnet launch! However, while the kinks are worked out or while you are testing your dApps having a trusty testnet to hook into is extremely valuable.\n\nIn this quick tutorial we'll be connecting our Scatter dApp to the [Jungle testnet](dev.cryptolions.io). We'll be taking the following steps:\n1. Create an account on the Testnet\n  * This requires generating two private / public key combos to assign as Owner and Active keys. We can do this in many ways, but for brevity we'll do so [here](https://nadejde.github.io/eos-token-sale/)\n2. Add the Jungle Testnet to our [Scatter Extension](scatter_link.com)\n  * If you're building a dApp you can \"suggest\" the testnet automatically to your users.\n3. Import our private / public keys into Scatter and create an identity.\n\n### Step One - Creating a Jungle Testnet account\n\nEvery EOS account requires an Owner and an Active key. The Owner key has superpowers, and as such it should be stored as safely as possible. The Active key is your day to day usage key. You shouldn't be careless with it, but it's the key you'll be using to interact with most dApps. Hence, we'll be generating two private / public key combinations. Please store and keep your private keys _private_.\n\nAlright, head over to https://nadejde.github.io/eos-token-sale/ and click on \"Generate EOS Key\". This will spit out a new private / public key combo. Save this somewhere safe... and then refresh the page and repeat the process.\n\n![Screen Shot 2018-06-04 at 7.48.53 PM.png](https://cdn.steemitimages.com/DQmctBL8qa1nWsbZbc7EcAT68tmfpin6s4aejkZg9drDU9M/Screen%20Shot%202018-06-04%20at%207.48.53%20PM.png)\n![Screen Shot 2018-06-04 at 7.49.39 PM.png](https://cdn.steemitimages.com/DQmZGTiuG1JJLug6Y5LHZvWY3wspaFLHSdr36UiJTLWQP2j/Screen%20Shot%202018-06-04%20at%207.49.39%20PM.png)\n\nNow that we have our keys, let's head over to the [Jungle testnet site](dev.cryptolions.io) and click on \"Create account\".\n\n![Screen Shot 2018-06-04 at 7.58.20 PM.png](https://cdn.steemitimages.com/DQmfAjGqTGxGCDE5683izRC7VYfLiqrJos5iJ6gVssihx3k/Screen%20Shot%202018-06-04%20at%207.58.20%20PM.png)\n\nHere we'll be asked for an account name. Take note of the very specific account name restrictions specified for EOS. Once you choose your name, go ahead and enter it. Now it's time to paste in your Owner _public_ key and your Active _public_ key. Again... make sure you are pasting in your _public_ keys. They'll start with \"EOS...\". Once you've done this go ahead and click create. If all goes well and the name is available you'll see something like this:\n\n![Screen Shot 2018-06-04 at 7.58.38 PM.png](https://cdn.steemitimages.com/DQmPBP9HtezroZajRbzJfM4WDGCwoqPFbmZtG153szeZgpB/Screen%20Shot%202018-06-04%20at%207.58.38%20PM.png)\n\nNow let's double-check that the account was created. Close that window and on the home page click on \"Account info\" and type in your new account name and click \"Get\". You should see the information of your newly created account, unfortunately with zero balance. We'll fix that in a sec. (Special note here: As of this writing, the testnet is creating the account with the same Owner and Active key. Double check this under account info and we'll use that when importing to Scatter).\n\nLet's get some test EOS and Jungle tokens into this account. Hit the \"Faucet\" link and type in your account name and click \"Send coins\".\n\nIf you go to account info again, you'll see you now have some EOS and JUNGLE to play with :).\n\n### Step Two - Adding the Jungle testnet to scatter\n\nThere are two ways to add the testnet to Scatter. One of them is as a user, where we'll manually add it. The other way is programmatically as a dApp developer and suggest adding it automatically for your users.\n\nFirst let's cover the manual option. We'll go to the Scatter extension, then choose \"Settings > Networks > New\". We should see a menu like this:\n\n![Screen Shot 2018-06-04 at 8.08.04 PM.png](https://cdn.steemitimages.com/DQmSSbosX4fj4LAnHgTm6d354FTFCsRBFV8Yz7DyLsjknbr/Screen%20Shot%202018-06-04%20at%208.08.04%20PM.png)\n\nAdd in the address \"dev.cryptolions.io\" and the port \"38888\" and hit \"Save\".\n\n![Screen Shot 2018-06-04 at 8.10.38 PM.png](https://cdn.steemitimages.com/DQmRc75rTer87opmBrHiLb15V5kSdRUuHcFhXMZaVUbb3WJ/Screen%20Shot%202018-06-04%20at%208.10.38%20PM.png)\n\nThis will add the testnet to your list of networks.\n\n![Screen Shot 2018-06-04 at 8.11.58 PM.png](https://cdn.steemitimages.com/DQmWUKAp7N6H5Z6DXogbG8E9yQLxrmYSoSGWsAbcVjskMa8/Screen%20Shot%202018-06-04%20at%208.11.58%20PM.png)\n\n##### dApp developer sidebar - suggesting network automatically.\n\nTo suggest a testnet to your users automatically, we can reference [this](https://github.com/EOSEssentials/Scatter#networks) from the Scatter documentation.\n\nWe'll configure the network options as so:\n\n```\nconst network = {\n    blockchain: 'eos',\n    host: 'dev.cryptolions.io',\n    port: 38888\n}\n\nscatter.suggestNetwork(network);\n```\n\nThis will prompt the user via Scatter to add this network to their extension automatically.\n\n![Screen Shot 2018-06-04 at 8.18.53 PM.png](https://cdn.steemitimages.com/DQmYsSXK5NAm3EPKjRDz7FJjyEaASMUXtjLxgM4VrYsJZAk/Screen%20Shot%202018-06-04%20at%208.18.53%20PM.png)\n\n\n### Step Three - Importing our keys into Scatter and creating an Identity\n\nThis will be our last step to have Scatter and the Jungle testnet playing nice. Typically I'd suggest importing your \"Active\" key here. Unfortunately, the Jungle testnet as of this writing ends up duplicating one of your keys and using it for both Owner and Active.\n\nLet's double-check which key our account ended up with. We go back to the [Jungle testnet site](dev.cryptolions.io) and click on \"Account info\". If you look just a couple of lines down you'll see your Owner and Active public keys.\n\n![Screen Shot 2018-06-04 at 8.23.24 PM.png](https://cdn.steemitimages.com/DQmNdRTz2V5P1m3AZnGdooBXNeHPYK2y3iT3PL8pALE8dhf/Screen%20Shot%202018-06-04%20at%208.23.24%20PM.png)\n\nYou'll notice that it's unfortunately the same. That's ok. Let's look up which of our private keys corresponds to the pubic key listed. Once you have it, let's add it to Scatter.\n\nIn Scatter, select the \"Key Pairs\" option. You can name it whatever will help you remember the combo. Once you add the name, copy / paste the private key that corresponds to the public key we checked earlier and click \"Save\"\n\nThis will add it to your list of key pairs.\n\n![Screen Shot 2018-06-04 at 8.26.37 PM.png](https://cdn.steemitimages.com/DQmWxo5sqdpdSHhoRBKXaiYf5YdaCY14wjWj4QyGx3uLtJw/Screen%20Shot%202018-06-04%20at%208.26.37%20PM.png)\n\n![Screen Shot 2018-06-04 at 8.41.31 PM.png](https://cdn.steemitimages.com/DQmXPNvyLG851AaVPWg2pjETazX78QARYs1FFE8DDt1bAVs/Screen%20Shot%202018-06-04%20at%208.41.31%20PM.png)\n\nAlright... now for the final step. Creating a Scatter identity!\n\nLet's go ahead and select the \"Identities > New\" option in Scatter. Under accounts make sure you select the \"EOS:dev.cryptolions.io\" network we added earlier. Under the \"None\" dropdown select the named Key Pair we also added earlier and click on \"Import\"\n\n![Screen Shot 2018-06-04 at 8.49.47 PM.png](https://cdn.steemitimages.com/DQmarYwFZNygExE3ZDdPycTSC3dvVbeHhT5DySczrvTLtVx/Screen%20Shot%202018-06-04%20at%208.49.47%20PM.png)\n\n![Screen Shot 2018-06-04 at 9.03.02 PM.png](https://cdn.steemitimages.com/DQmWyqswxCyU297KzpbTk1iMW5X5sBLK1rxMjU1BM2pND6w/Screen%20Shot%202018-06-04%20at%209.03.02%20PM.png)\n\n![Screen Shot 2018-06-04 at 9.11.13 PM.png](https://cdn.steemitimages.com/DQmTFz4iHoLM5HgkpAwRNZ5oTokMRTV1GtEmh9HSyJqS6Yc/Screen%20Shot%202018-06-04%20at%209.11.13%20PM.png)\n\nHere go ahead and select the \"Active\" account. Click on \"Use Selected Account\". You'll see the account name being added. What is happening here is that the same public key is assigned for both Owner and Active and Scatter wants us to select which of the permissions levels to use. As you can see, there are other options that can be added for your Scatter / RIDL identity. These are very neat and the applications are interesting. Go ahead and read up on those on the Scatter site. Think of a single oAuth across many sites (dApps) via EOS. For now we'll leave those blank and hit \"Save\" on the top right corner.\n\n![Screen Shot 2018-06-04 at 9.11.36 PM.png](https://cdn.steemitimages.com/DQmfXgM9ooc61XhbpCHyxDE8scrqGCc1bQmGsLJG8m6ihsy/Screen%20Shot%202018-06-04%20at%209.11.36%20PM.png)\n\nYou'll see that a random identity is created for you. In my case here it's \"RandomRhyno...\". We are all setup! One way we can quickly confirm this is by using the token balance feature of Scatter.\n\nIn the bottom-left corner, you'll see a \"circle\" button. Click on that and you'll see your token balances appear!\n\n![Screen Shot 2018-06-04 at 9.13.37 PM.png](https://cdn.steemitimages.com/DQmVrYqrqMaZCqdyFNGt6dARUbE1th6oniWj9aziquVNeTc/Screen%20Shot%202018-06-04%20at%209.13.37%20PM.png)\n\nSWEET! We are all setup to use Scatter with any dApps on the Jungle testnet. That's it for now. If this was helpful and you want to show some thanks via Eth for now... you can do so via an ETH dApp that me and the Sense team worked on here:\n\nhttps://ether.dm/0x2794d1321035f0ef2faad52e21cad2ef82362835\n\n(And of course the EOS version is in the works 🚀)\n\nPS: Sorry for the unresized images... figured it was better to get this out than to spend all night figuring this out 😛",
      "json_metadata": "{\"tags\":[\"eos\",\"scatter\",\"jungle\",\"testnet\",\"cryptolions\"],\"image\":[\"https://cdn.steemitimages.com/DQmejAq3dYv4cYbXQspKczaoGocRkcmeUnM5DieFVtbFPu2/lion.jpg\",\"https://cdn.steemitimages.com/DQmctBL8qa1nWsbZbc7EcAT68tmfpin6s4aejkZg9drDU9M/Screen%20Shot%202018-06-04%20at%207.48.53%20PM.png\",\"https://cdn.steemitimages.com/DQmZGTiuG1JJLug6Y5LHZvWY3wspaFLHSdr36UiJTLWQP2j/Screen%20Shot%202018-06-04%20at%207.49.39%20PM.png\",\"https://cdn.steemitimages.com/DQmfAjGqTGxGCDE5683izRC7VYfLiqrJos5iJ6gVssihx3k/Screen%20Shot%202018-06-04%20at%207.58.20%20PM.png\",\"https://cdn.steemitimages.com/DQmPBP9HtezroZajRbzJfM4WDGCwoqPFbmZtG153szeZgpB/Screen%20Shot%202018-06-04%20at%207.58.38%20PM.png\",\"https://cdn.steemitimages.com/DQmSSbosX4fj4LAnHgTm6d354FTFCsRBFV8Yz7DyLsjknbr/Screen%20Shot%202018-06-04%20at%208.08.04%20PM.png\",\"https://cdn.steemitimages.com/DQmRc75rTer87opmBrHiLb15V5kSdRUuHcFhXMZaVUbb3WJ/Screen%20Shot%202018-06-04%20at%208.10.38%20PM.png\",\"https://cdn.steemitimages.com/DQmWUKAp7N6H5Z6DXogbG8E9yQLxrmYSoSGWsAbcVjskMa8/Screen%20Shot%202018-06-04%20at%208.11.58%20PM.png\",\"https://cdn.steemitimages.com/DQmYsSXK5NAm3EPKjRDz7FJjyEaASMUXtjLxgM4VrYsJZAk/Screen%20Shot%202018-06-04%20at%208.18.53%20PM.png\",\"https://cdn.steemitimages.com/DQmNdRTz2V5P1m3AZnGdooBXNeHPYK2y3iT3PL8pALE8dhf/Screen%20Shot%202018-06-04%20at%208.23.24%20PM.png\",\"https://cdn.steemitimages.com/DQmWxo5sqdpdSHhoRBKXaiYf5YdaCY14wjWj4QyGx3uLtJw/Screen%20Shot%202018-06-04%20at%208.26.37%20PM.png\",\"https://cdn.steemitimages.com/DQmXPNvyLG851AaVPWg2pjETazX78QARYs1FFE8DDt1bAVs/Screen%20Shot%202018-06-04%20at%208.41.31%20PM.png\",\"https://cdn.steemitimages.com/DQmarYwFZNygExE3ZDdPycTSC3dvVbeHhT5DySczrvTLtVx/Screen%20Shot%202018-06-04%20at%208.49.47%20PM.png\",\"https://cdn.steemitimages.com/DQmWyqswxCyU297KzpbTk1iMW5X5sBLK1rxMjU1BM2pND6w/Screen%20Shot%202018-06-04%20at%209.03.02%20PM.png\",\"https://cdn.steemitimages.com/DQmTFz4iHoLM5HgkpAwRNZ5oTokMRTV1GtEmh9HSyJqS6Yc/Screen%20Shot%202018-06-04%20at%209.11.13%20PM.png\",\"https://cdn.steemitimages.com/DQmfXgM9ooc61XhbpCHyxDE8scrqGCc1bQmGsLJG8m6ihsy/Screen%20Shot%202018-06-04%20at%209.11.36%20PM.png\",\"https://cdn.steemitimages.com/DQmVrYqrqMaZCqdyFNGt6dARUbE1th6oniWj9aziquVNeTc/Screen%20Shot%202018-06-04%20at%209.13.37%20PM.png\"],\"links\":[\"dev.cryptolions.io\",\"https://nadejde.github.io/eos-token-sale/\",\"scatter_link.com\",\"https://github.com/EOSEssentials/Scatter#networks\",\"https://ether.dm/0x2794d1321035f0ef2faad52e21cad2ef82362835\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}"
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{
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  "block": 23046626,
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  "op": [
    "comment",
    {
      "parent_author": "",
      "parent_permlink": "eos",
      "author": "ajose01",
      "permlink": "scatter-and-the-jungle-testnet",
      "title": "Scatter and the JUNGLE (testnet)!",
      "body": "![lion.jpg](https://cdn.steemitimages.com/DQmejAq3dYv4cYbXQspKczaoGocRkcmeUnM5DieFVtbFPu2/lion.jpg)\n\n## Using Scatter with the Jungle EOS Testnet\n\nWe are oh so close to the EOS Mainnet launch! However, while the kinks are worked out or while you are testing your dApps having a trusty testnet to hook into is extremely valuable.\n\nIn this quick tutorial we'll be connecting our Scatter dApp to the [Jungle testnet](dev.cryptolions.io). We'll be taking the following steps:\n1. Create an account on the Testnet\n  * This requires generating two private / public key combos to assign as Owner and Active keys. We can do this in many ways, but for brevity we'll do so [here](https://nadejde.github.io/eos-token-sale/)\n2. Add the Jungle Testnet to our [Scatter Extension](scatter_link.com)\n  * If you're building a dApp you can \"suggest\" the testnet automatically to your users.\n3. Import our private / public keys into Scatter and create an identity.\n\n### Step One - Creating a Jungle Testnet account\n\nEvery EOS account requires an Owner and an Active key. The Owner key has superpowers, and as such it should be stored as safely as possible. The Active key is your day to day usage key. You shouldn't be careless with it, but it's the key you'll be using to interact with most dApps. Hence, we'll be generating two private / public key combinations. Please store and keep your private keys _private_.\n\nAlright, head over to https://nadejde.github.io/eos-token-sale/ and click on \"Generate EOS Key\". This will spit out a new private / public key combo. Save this somewhere safe... and then refresh the page and repeat the process.\n\n![Screen Shot 2018-06-04 at 7.48.53 PM.png](https://cdn.steemitimages.com/DQmctBL8qa1nWsbZbc7EcAT68tmfpin6s4aejkZg9drDU9M/Screen%20Shot%202018-06-04%20at%207.48.53%20PM.png)\n![Screen Shot 2018-06-04 at 7.49.39 PM.png](https://cdn.steemitimages.com/DQmZGTiuG1JJLug6Y5LHZvWY3wspaFLHSdr36UiJTLWQP2j/Screen%20Shot%202018-06-04%20at%207.49.39%20PM.png)\n\nNow that we have our keys, let's head over to the [Jungle testnet site](dev.cryptolions.io) and click on \"Create account\".\n\n![Screen Shot 2018-06-04 at 7.58.20 PM.png](https://cdn.steemitimages.com/DQmfAjGqTGxGCDE5683izRC7VYfLiqrJos5iJ6gVssihx3k/Screen%20Shot%202018-06-04%20at%207.58.20%20PM.png)\n\nHere we'll be asked for an account name. Take note of the very specific account name restrictions specified for EOS. Once you choose your name, go ahead and enter it. Now it's time to paste in your Owner _public_ key and your Active _public_ key. Again... make sure you are pasting in your _public_ keys. They'll start with \"EOS...\". Once you've done this go ahead and click create. If all goes well and the name is available you'll see something like this:\n\n![Screen Shot 2018-06-04 at 7.58.38 PM.png](https://cdn.steemitimages.com/DQmPBP9HtezroZajRbzJfM4WDGCwoqPFbmZtG153szeZgpB/Screen%20Shot%202018-06-04%20at%207.58.38%20PM.png)\n\nNow let's double-check that the account was created. Close that window and on the home page click on \"Account info\" and type in your new account name and click \"Get\". You should see the information of your newly created account, unfortunately with zero balance. We'll fix that in a sec. (Special note here: As of this writing, the testnet is creating the account with the same Owner and Active key. Double check this under account info and we'll use that when importing to Scatter).\n\nLet's get some test EOS and Jungle tokens into this account. Hit the \"Faucet\" link and type in your account name and click \"Send coins\".\n\nIf you go to account info again, you'll see you now have some EOS and JUNGLE to play with :).\n\n### Step Two - Adding the Jungle testnet to scatter\n\nThere are two ways to add the testnet to Scatter. One of them is as a user, where we'll manually add it. The other way is programmatically as a dApp developer and suggest adding it automatically for your users.\n\nFirst let's cover the manual option. We'll go to the Scatter extension, then choose \"Settings > Networks > New\". We should see a menu like this:\n\n![Screen Shot 2018-06-04 at 8.08.04 PM.png](https://cdn.steemitimages.com/DQmSSbosX4fj4LAnHgTm6d354FTFCsRBFV8Yz7DyLsjknbr/Screen%20Shot%202018-06-04%20at%208.08.04%20PM.png)\n\nAdd in the address \"dev.cryptolions.io\" and the port \"38888\" and hit \"Save\".\n\n![Screen Shot 2018-06-04 at 8.10.38 PM.png](https://cdn.steemitimages.com/DQmRc75rTer87opmBrHiLb15V5kSdRUuHcFhXMZaVUbb3WJ/Screen%20Shot%202018-06-04%20at%208.10.38%20PM.png)\n\nThis will add the testnet to your list of networks.\n\n![Screen Shot 2018-06-04 at 8.11.58 PM.png](https://cdn.steemitimages.com/DQmWUKAp7N6H5Z6DXogbG8E9yQLxrmYSoSGWsAbcVjskMa8/Screen%20Shot%202018-06-04%20at%208.11.58%20PM.png)\n\n##### dApp developer sidebar - suggesting network automatically.\n\nTo suggest a testnet to your users automatically, we can reference [this](https://github.com/EOSEssentials/Scatter#networks) from the Scatter documentation.\n\nWe'll configure the network options as so:\n\n```\nconst network = {\n    blockchain: 'eos',\n    host: 'dev.cryptolions.io',\n    port: 38888\n}\n\nscatter.suggestNetwork(network);\n```\n\nThis will prompt the user via Scatter to add this network to their extension automatically.\n\n![Screen Shot 2018-06-04 at 8.18.53 PM.png](https://cdn.steemitimages.com/DQmYsSXK5NAm3EPKjRDz7FJjyEaASMUXtjLxgM4VrYsJZAk/Screen%20Shot%202018-06-04%20at%208.18.53%20PM.png)\n\n\n### Step Three - Importing our keys into Scatter and creating an Identity\n\nThis will be our last step to have Scatter and the Jungle testnet playing nice. Typically I'd suggest importing your \"Active\" key here. Unfortunately, the Jungle testnet as of this writing ends up duplicating one of your keys and using it for both Owner and Active.\n\nLet's double-check which key our account ended up with. We go back to the [Jungle testnet site](dev.cryptolions.io) and click on \"Account info\". If you look just a couple of lines down you'll see your Owner and Active public keys.\n\n![Screen Shot 2018-06-04 at 8.23.24 PM.png](https://cdn.steemitimages.com/DQmNdRTz2V5P1m3AZnGdooBXNeHPYK2y3iT3PL8pALE8dhf/Screen%20Shot%202018-06-04%20at%208.23.24%20PM.png)\n\nYou'll notice that it's unfortunately the same. That's ok. Let's look up which of our private keys corresponds to the pubic key listed. Once you have it, let's add it to Scatter.\n\nIn Scatter, select the \"Key Pairs\" option. You can name it whatever will help you remember the combo. Once you add the name, copy / paste the private key that corresponds to the public key we checked earlier and click \"Save\"\n\nThis will add it to your list of key pairs.\n\n![Screen Shot 2018-06-04 at 8.26.37 PM.png](https://cdn.steemitimages.com/DQmWxo5sqdpdSHhoRBKXaiYf5YdaCY14wjWj4QyGx3uLtJw/Screen%20Shot%202018-06-04%20at%208.26.37%20PM.png)\n\n![Screen Shot 2018-06-04 at 8.41.31 PM.png](https://cdn.steemitimages.com/DQmXPNvyLG851AaVPWg2pjETazX78QARYs1FFE8DDt1bAVs/Screen%20Shot%202018-06-04%20at%208.41.31%20PM.png)\n\nAlright... now for the final step. Creating a Scatter identity!\n\nLet's go ahead and select the \"Identities > New\" option in Scatter. Under accounts make sure you select the \"EOS:dev.cryptolions.io\" network we added earlier. Under the \"None\" dropdown select the named Key Pair we also added earlier and click on \"Import\"\n\n![Screen Shot 2018-06-04 at 8.49.47 PM.png](https://cdn.steemitimages.com/DQmarYwFZNygExE3ZDdPycTSC3dvVbeHhT5DySczrvTLtVx/Screen%20Shot%202018-06-04%20at%208.49.47%20PM.png)\n\n![Screen Shot 2018-06-04 at 9.03.02 PM.png](https://cdn.steemitimages.com/DQmWyqswxCyU297KzpbTk1iMW5X5sBLK1rxMjU1BM2pND6w/Screen%20Shot%202018-06-04%20at%209.03.02%20PM.png)\n\n![Screen Shot 2018-06-04 at 9.11.13 PM.png](https://cdn.steemitimages.com/DQmTFz4iHoLM5HgkpAwRNZ5oTokMRTV1GtEmh9HSyJqS6Yc/Screen%20Shot%202018-06-04%20at%209.11.13%20PM.png)\n\nHere go ahead and select the \"Active\" account. Click on \"Use Selected Account\". You'll see the account name being added. What is happening here is that the same public key is assigned for both Owner and Active and Scatter wants us to select which of the permissions levels to use. As you can see, there are other options that can be added for your Scatter / RIDL identity. These are very neat and the applications are interesting. Go ahead and read up on those on the Scatter site. Think of a single oAuth across many sites (dApps) via EOS. For now we'll leave those blank and hit \"Save\" on the top right corner.\n\n![Screen Shot 2018-06-04 at 9.11.36 PM.png](https://cdn.steemitimages.com/DQmfXgM9ooc61XhbpCHyxDE8scrqGCc1bQmGsLJG8m6ihsy/Screen%20Shot%202018-06-04%20at%209.11.36%20PM.png)\n\nYou'll see that a random identity is created for you. In my case here it's \"RandomRhyno...\". We are all setup! One way we can quickly confirm this is by using the token balance feature of Scatter.\n\nIn the bottom-left corner, you'll see a \"circle\" button. Click on that and you'll see your token balances appear!\n\n![Screen Shot 2018-06-04 at 9.13.37 PM.png](https://cdn.steemitimages.com/DQmVrYqrqMaZCqdyFNGt6dARUbE1th6oniWj9aziquVNeTc/Screen%20Shot%202018-06-04%20at%209.13.37%20PM.png)\n\nSWEET! We are all setup to use Scatter with any dApps on the Jungle testnet. That's it for now. If this was helpful and you want to show some thanks via Eth for now... you can do so via an ETH dApp that me and the Sense team worked on here:\n\nhttps://ether.dm/0x2794d1321035f0ef2faad52e21cad2ef82362835\n\n(And of course the EOS version is in the works 🚀)\n\nPS: Sorry for the unresized images... figured it was better to get this out than to spend all night figuring this out 😛",
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