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{
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{
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      "author": "loowin",
      "body": "@@ -1092,16 +1092,1470 @@\n )%0A%0A---%0A%0A\n+%EA%B3%84%EC%A0%95 %EC%83%9D%EC%84%B1%EC%9D%B4 %EC%99%84%EB%A3%8C %EB%90%98%EC%97%88%EC%9C%BC%EB%8B%88 %EC%B1%84%EA%B5%B4%EC%9D%84 %EC%8B%9C%EC%9E%91%ED%95%98%EA%B2%A0%EB%8B%A4.%0A%0A%EC%9D%B4%EB%8D%94%EB%A6%AC%EC%9B%80%EC%97%90%EC%84%9C %EC%B1%84%EA%B5%B4%EC%97%90 %EC%84%B1%EA%B3%B5%ED%96%88%EC%9D%84 %EB%95%8C %EB%B3%B4%EC%83%81%EC%9D%84 %EB%B0%9B%EB%8A%94 %EA%B3%84%EC%A0%95%EC%9D%84 Etherbase%EB%9D%BC%EA%B3%A0 %ED%95%9C%EB%8B%A4. %EA%B8%B0%EB%B3%B8%EC%A0%81%EC%9C%BC%EB%A1%9C eth.account%5B0%5D%EC%9D%B4 %EC%84%A4%EC%A0%95%EB%90%9C%EB%8B%A4. %0A%0A$ eth.coinbase%0A$ eth.accounts%0A!%5B%5D(https://steemitimages.com/DQme9vGpL6eRZLF5hms6w14tRFqUfTZPEDbZFvWsBeH7gqj/image.png)%0A%0A%EC%9E%94%EA%B3%A0 %ED%99%95%EC%9D%B8%EC%9D%80 eth.getBalance %EB%AA%85%EB%A0%B9%EC%9C%BC%EB%A1%9C %EC%95%8C %EC%88%98 %EC%9E%88%EB%8B%A4.%0A%0A$ eth.getBalance(eth.accounts%5B0%5D)%0A$ eth.blockNumber%0A!%5B%5D(https://steemitimages.com/DQmbWQVXtvB6dvqFzFxzBzrTZ1E7JjQvoxXTGHVcxtMWH4G/image.png)%0A%0A%EC%9D%B4%EC%A0%9C %EC%B1%84%EA%B5%B4%EC%9D%84 %EC%8B%9C%EC%9E%91%ED%95%9C%EB%8B%A4.%0A%0A$ miner.start(1)%0A!%5B%5D(https://steemitimages.com/DQmYqaToF6cvkj9UpQQLZ5Y6fdiwFWehheGYKAfzsFSnDLD/image.png)%0A%0AGeth%EC%BD%98%EC%86%94%EC%97%90%EC%84%9C %EB%B9%A0%EC%A0%B8%EB%82%98%EC%99%80 %EB%A1%9C%EA%B7%B8 %ED%8C%8C%EC%9D%BC%EC%9D%84 %ED%99%95%EC%9D%B8%ED%95%B4%EB%B3%B4%EB%A9%B4 mining%EC%A4%91%EC%9D%B8%EA%B2%83%EC%9D%84 %EC%95%8C%EC%88%98%EC%9E%88%EB%8B%A4.%0A%0A$ tail -100f -~/data_testnet/geth.log %0A!%5B%5D(https://steemitimages.com/DQmQoK1b8NeshwuCTYB4DiQ6TLsomsBzgUsTpgqvaitgaEe/image.png)%0A%0A%EC%B1%84%EA%B5%B4%EC%9D%84 %ED%95%98%EA%B3%A0 %EC%9E%88%EB%8A%94%EC%A7%80 %ED%95%B4%EC%8B%9C %EC%86%8D%EB%8F%84, %EB%B8%94%EB%A1%9D%EC%9D%98%EA%B8%B8%EC%9D%B4 %EB%93%B1%EC%9D%84 %ED%99%95%EC%9D%B8%ED%95%A0%EC%88%98%EC%9E%88%EB%8B%A4.%0A%0A$ eth.mining %0A$ eth.hashhrate%0A$ eth.blockNumber%0A!%5B%5D(https://steemitimages.com/DQmXCR11xXXgxXa6Kb2t4sCGzE4kK2NUJYg37XcseaHZwQK/image.png)%0A%0A%EC%96%B4%EB%8A%90 %EC%A0%95%EB%8F%84 %EC%B1%84%EA%B5%B4%EC%9D%B4 %EB%90%98%EC%97%88%EC%9C%BC%EB%A9%B4 %EC%B1%84%EA%B5%B4%EC%9D%84 %EC%A4%91%EB%8B%A8%ED%95%B4%EB%B3%B4%EA%B2%A0%EB%8B%A4.%0A%0A$ miner.stop()%0A$ eth.mining%0A$ eth.hashhrate%0A$ eth.blockNumber%0A!%5B%5D(https://steemitimages.com/DQmfPGxoFquhBHQzb4YKbQFURgKsBDwNGCGNCedX7d3NdWW/image.png)%0A%0AEth.getBalance(eth.accounts%5B0%5D)%EC%9D%98 %EB%AA%85%EB%A0%B9%EC%96%B4%EB%A1%9C coinbase%EC%9D%98 %EC%9E%94%EA%B3%A0%EB%A5%BC %ED%99%95%EC%9D%B8%ED%95%B4%EB%B3%B4%EC%9E%90%0A%EC%88%AB%EC%9E%90%EC%9D%98 %EB%8B%A8%EC%9C%84%EB%8A%94 wei%EB%A1%9C %ED%91%9C%EC%8B%9C%EA%B0%80 %EB%90%9C%EB%8B%A4. %EC%95%84%EB%9E%98%EC%9D%98 %EC%BD%94%EB%93%9C%EB%8A%94 wei%EB%A5%BC ether%EB%A1%9C %EB%B3%80%ED%99%98%ED%95%B4%EC%84%9C %EB%B3%B4%EC%97%AC%EC%A4%80%EB%8B%A4.%0B%0A%0A$ web3.fromWei(eth.getBalance(eth.accounts%5B0%5D,%22ether%22)%0A!%5B%5D(https://steemitimages.com/DQmc1vqNQHeYNJ2n8MRp8KaM4b781egkhFabTiB3KXbFhQ5/image.png)%0A%0A%EC%9C%84%EC%97%90 eth.blockNumber%EB%A1%9C 1197%EB%B8%94%EB%A1%9D%EC%9D%B4 %EC%9E%88%EA%B3%A0 getBalance%EB%A1%9C 5985ether%EA%B0%80 %EC%9E%88%EB%8A%94 %EA%B2%83%EC%9D%84 %ED%99%95%EC%9D%B8%ED%95%98%EC%98%80%EB%8B%A4.%0A%ED%98%84%EC%9E%AC %EC%B1%84%EA%B5%B4%EB%A1%9C %EB%B0%9B%EC%9D%84 %EC%88%98 %EC%9E%88%EB%8A%94 %EB%B3%B4%EC%83%81%EC%9D%80 1%EB%B8%94%EB%A1%9D%EC%97%90 5ether%EC%9D%B4%EB%8B%A4. %EB%B8%94%EB%A1%9D%EC%9D%98 %EA%B8%B8%EC%9D%B4%EA%B0%80 1197%EC%9D%B4%EB%AF%80%EB%A1%9C 1197x5=5985 %EC%9E%84%EC%9D%84 %ED%99%95%EC%9D%B8%ED%95%A0 %EC%88%98 %EC%9E%88%EB%8B%A4.%0A%0A---%0A%0A\n %EC%B1%84%EA%B5%B4%EC%9D%84 %ED%86%B5%ED%95%B4 e\n",
      "json_metadata": "{\"tags\":[\"gasprice\",\"gas\",\"eoa\",\"geth\",\"ether\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\",\"image\":[\"https://steemitimages.com/DQmeSUZdUqBXFWrPfXiNjpTm9msVcFfK5932KxUrufDCvwB/image.png\",\"https://steemitimages.com/DQmcqJrb2mZiQJXqyUcTtynbJ5JxaQS71A88p5TGSitj3jg/image.png\",\"https://steemitimages.com/DQmRQ7jpKD44ydU8QKe7y7KMgCyEhb8UbjPT3fUpofzkQZU/image.png\",\"https://steemitimages.com/DQmasTu78rdu5KxCMzdjTJwrRnq6uWR8KdZMjxaQAyPWQ6s/image.png\",\"https://steemitimages.com/DQmemQUH4M5zu81FpXoG8Hse4dECtwB3VRrtDqqSo8Po6Ew/image.png\",\"https://steemitimages.com/DQmUF7b4vfZ2V3X4t3WxjBQfdKnxDHif1Z744e8EmXkQHqR/image.png\",\"https://steemitimages.com/DQme9vGpL6eRZLF5hms6w14tRFqUfTZPEDbZFvWsBeH7gqj/image.png\",\"https://steemitimages.com/DQmbWQVXtvB6dvqFzFxzBzrTZ1E7JjQvoxXTGHVcxtMWH4G/image.png\",\"https://steemitimages.com/DQmYqaToF6cvkj9UpQQLZ5Y6fdiwFWehheGYKAfzsFSnDLD/image.png\",\"https://steemitimages.com/DQmQoK1b8NeshwuCTYB4DiQ6TLsomsBzgUsTpgqvaitgaEe/image.png\",\"https://steemitimages.com/DQmXCR11xXXgxXa6Kb2t4sCGzE4kK2NUJYg37XcseaHZwQK/image.png\",\"https://steemitimages.com/DQmfPGxoFquhBHQzb4YKbQFURgKsBDwNGCGNCedX7d3NdWW/image.png\",\"https://steemitimages.com/DQmc1vqNQHeYNJ2n8MRp8KaM4b781egkhFabTiB3KXbFhQ5/image.png\",\"https://steemitimages.com/DQmXS3ycWgBwSHh5X32syqCdgDzzX58DeB55S3rQdv6npbm/image.png\",\"https://steemitimages.com/DQmPefP6DZ1uMfzv5S68F6gDMMZMHW29YGXTVQSphAx2hcr/image.png\",\"https://steemitimages.com/DQmWnbnHjtRZtmLubXncyNdxSmbTf2Nf9sDwE8mdF4YDHe9/image.png\",\"https://steemitimages.com/DQmb4mrspxgkccvcCAp5iZYXAxmQyonyvbuPYBKQFTxXjNW/image.png\",\"https://steemitimages.com/DQmQYrsyTuqTwPYGkCojby5TV1zeaiN7qq7uNn1bahYchqJ/image.png\",\"https://steemitimages.com/DQmUoRMUb6t3Cb8AAxFYi4e14AiUc5d2uRxBAoFbzVid4An/image.png\",\"https://steemitimages.com/DQmR9uiyRFNtSUK1GdhaJw7dJ8UYVL66GpWPbe7K5MZvypq/image.png\"]}",
      "parent_author": "",
      "parent_permlink": "gasprice",
      "permlink": "2-3-4",
      "title": "블록체인 애플리케이션 개발 실전 입문 2-3 4장"
    }
  ],
  "op_in_trx": 0,
  "timestamp": "2018-02-08T10:00:51",
  "trx_id": "2ecf829a587ee2f838345bb2eff712f36e71c805",
  "trx_in_block": 42,
  "virtual_op": 0
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{
  "block": 19686772,
  "op": [
    "comment",
    {
      "author": "loowin",
      "body": "이제 geth콘솔에서 계정을 만들고 ether를 송금해보자\n\n이더리움에는 두가지 종류의 계정이 있다.\n\n1) EOA는 일반 사용자가 사용하는 계정으로 비킬키를 관리한다. Ether를 송금하거나 계약을 실행할 수 있다.\n2) Contrat계정은 이름처럼 계양용 계정으로, 계약을 블록체인에 배포할 때 만들어지는 계정으로 다른 계정으로부터 메시지를 수신해 코드를 실행하고 계정에 메시지를 보낼 수 있다.\n\n---\n\npersonal.newAccount 명령어를 이용하여 EOA를 생성한다.\n\n$ personal.newAccount(\"pass0\")\n![](https://steemitimages.com/DQmeSUZdUqBXFWrPfXiNjpTm9msVcFfK5932KxUrufDCvwB/image.png)\n\neth.accounts로 계정을 확인해보자\n\n$ eth.accounts\n![](https://steemitimages.com/DQmcqJrb2mZiQJXqyUcTtynbJ5JxaQS71A88p5TGSitj3jg/image.png)\n\n계정을 하나 더 추가해보자\n![](https://steemitimages.com/DQmRQ7jpKD44ydU8QKe7y7KMgCyEhb8UbjPT3fUpofzkQZU/image.png)\n\nExit로 콘솔을 종료하면 geth프로세스도 종료된다. Ps명령으로 geth프로세스가 동작하지 않는 것을 확인할 수 있다.\n\n$ ps -eaf | grep geth\n![](https://steemitimages.com/DQmasTu78rdu5KxCMzdjTJwrRnq6uWR8KdZMjxaQAyPWQ6s/image.png)\n\n터미널 창에서도 계정을 생성할 수 있다.\n\n$ geth --datadir /Users/Humanscape/Desktop/data_testnet account new\n![](https://steemitimages.com/DQmemQUH4M5zu81FpXoG8Hse4dECtwB3VRrtDqqSo8Po6Ew/image.png)\n\n계정확인도 가능하다.\n![](https://steemitimages.com/DQmUF7b4vfZ2V3X4t3WxjBQfdKnxDHif1Z744e8EmXkQHqR/image.png)\n\n---\n\n채굴을 통해 ether를 생성했으니 송금을 해보자.\n\n송금을 하기 위해선 계정 잠금을 먼저 해제해야한다. 해제의 유효시간은 기본적으로 300초이다.\n\n$ personal.unlockAccount(eth.accounts[0], \"pass0\")\n![](https://steemitimages.com/DQmXS3ycWgBwSHh5X32syqCdgDzzX58DeB55S3rQdv6npbm/image.png)\n\n잠금을 해제했으니 accounts[0] -> accounts[1]로 10ether를 송금해보자.\n\n$eth.sendTransaction({from:eth.accounts[0], to:eth.accounts[1], value:web3.toWei(10,\"ether\")})\n\n송금 후 정상적으로 송금이 됐는지 잔고 확인을 해보자.\n\n$ eth.getBalance(eth.accounts[1])\n\n잔고가 0일 것이다.\nsendTransaction으로 트랜잭션이 발생해도 처리가 실행되지 않는다. 블록체인에서 블록 안에 트랜잭션이 포함될 때 트랜잭션의 내용이 실행된다. 트랜잭션 상태를 확인해 보자.\n\n$ eth.getTransaction(\"sendTransaction해시값\")\n\nblockNumber가 null인 상태다. Null은 블록에 포함되지 않았다는 것을 포함한다. \neth.pendingTransactions로 현재 계류 중인 트랜잭션을 확인할 수 있다.\n![](https://steemitimages.com/DQmPefP6DZ1uMfzv5S68F6gDMMZMHW29YGXTVQSphAx2hcr/image.png)\n\n미처리된 트랜잭션을 처리하기 위해서는 채굴을 재개해야한다.\n재개한 후에 pendingTransactions로 미처리 트랜잭션 내용이 남아 있는지 확인한다.\neth.account[1]로 10이더가 전송 됐는지 확인해보자.\n\n$ miner.start(1)\n$ eth.pendingTransactions\n$ eth.getBalance(eth.account[1])\n![](https://steemitimages.com/DQmWnbnHjtRZtmLubXncyNdxSmbTf2Nf9sDwE8mdF4YDHe9/image.png)\n\ngetTransaction으로 bloackNumver의 값을 확인해보자\n\n$ eth.getTransaction(\"sendTransaction해시값\")\n![](https://steemitimages.com/DQmb4mrspxgkccvcCAp5iZYXAxmQyonyvbuPYBKQFTxXjNW/image.png)\n\n1198번째 blockNumber 값으로 할당된 것을 확인했다.\n1198번째 블록 정보를 확인해보자\n\n$ eth.getBlock(1198)\n![](https://steemitimages.com/DQmQYrsyTuqTwPYGkCojby5TV1zeaiN7qq7uNn1bahYchqJ/image.png)\n\n이번엔 accounts[1] -> accounts[2]로 5ether를 송금해보자.\n![](https://steemitimages.com/DQmUoRMUb6t3Cb8AAxFYi4e14AiUc5d2uRxBAoFbzVid4An/image.png)\n\n전송결과 accounts[2]의 잔고가 5ether가 아닌 4.99958ether이다.\n\n거래 트랜잭션을 확인해 보자\n![](https://steemitimages.com/DQmR9uiyRFNtSUK1GdhaJw7dJ8UYVL66GpWPbe7K5MZvypq/image.png)\n\n여기서 gas와  gasprice를 확인해보자\n\n지불한 수수료 / gasPrice를 해보면 420000000000000 / 20000000000 = 21000gas이다.\n실제 지불한 gas는 21000이다. 트랜잭션에서 지정한 gas의 값 90000보다 작은 것을 확인할 수 있다.\n\n처음에 [0] -> [1] 10이더를 송금할 때 생긴 수수료는 [0]이 etherbase임으로 해당 수수료를 자기가 받게 된다. 따라서 수수료가 발생하지 않는 것처럼 보였었다.\n\n---\n\n이상 이더의 계정을 생성, 채굴, 송금해 보았다.",
      "json_metadata": "{\"tags\":[\"gasprice\",\"gas\",\"eoa\",\"geth\",\"ether\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\",\"image\":[\"https://steemitimages.com/DQmeSUZdUqBXFWrPfXiNjpTm9msVcFfK5932KxUrufDCvwB/image.png\",\"https://steemitimages.com/DQmcqJrb2mZiQJXqyUcTtynbJ5JxaQS71A88p5TGSitj3jg/image.png\",\"https://steemitimages.com/DQmRQ7jpKD44ydU8QKe7y7KMgCyEhb8UbjPT3fUpofzkQZU/image.png\",\"https://steemitimages.com/DQmasTu78rdu5KxCMzdjTJwrRnq6uWR8KdZMjxaQAyPWQ6s/image.png\",\"https://steemitimages.com/DQmemQUH4M5zu81FpXoG8Hse4dECtwB3VRrtDqqSo8Po6Ew/image.png\",\"https://steemitimages.com/DQmUF7b4vfZ2V3X4t3WxjBQfdKnxDHif1Z744e8EmXkQHqR/image.png\",\"https://steemitimages.com/DQmXS3ycWgBwSHh5X32syqCdgDzzX58DeB55S3rQdv6npbm/image.png\",\"https://steemitimages.com/DQmPefP6DZ1uMfzv5S68F6gDMMZMHW29YGXTVQSphAx2hcr/image.png\",\"https://steemitimages.com/DQmWnbnHjtRZtmLubXncyNdxSmbTf2Nf9sDwE8mdF4YDHe9/image.png\",\"https://steemitimages.com/DQmb4mrspxgkccvcCAp5iZYXAxmQyonyvbuPYBKQFTxXjNW/image.png\",\"https://steemitimages.com/DQmQYrsyTuqTwPYGkCojby5TV1zeaiN7qq7uNn1bahYchqJ/image.png\",\"https://steemitimages.com/DQmUoRMUb6t3Cb8AAxFYi4e14AiUc5d2uRxBAoFbzVid4An/image.png\",\"https://steemitimages.com/DQmR9uiyRFNtSUK1GdhaJw7dJ8UYVL66GpWPbe7K5MZvypq/image.png\"]}",
      "parent_author": "",
      "parent_permlink": "gasprice",
      "permlink": "2-3-4",
      "title": "블록체인 애플리케이션 개발 실전 입문 2-3 4장"
    }
  ],
  "op_in_trx": 0,
  "timestamp": "2018-02-08T10:00:30",
  "trx_id": "e1a3afdf16410b1eae9151d953f3551163aed5cc",
  "trx_in_block": 38,
  "virtual_op": 0
}

{
  "block": 19686759,
  "op": [
    "comment",
    {
      "author": "loowin",
      "body": "@@ -384,8 +384,714 @@\n age.png)\n+%0A%0Aeth.accounts%EB%A1%9C %EA%B3%84%EC%A0%95%EC%9D%84 %ED%99%95%EC%9D%B8%ED%95%B4%EB%B3%B4%EC%9E%90%0A%0A$ eth.accounts%0A!%5B%5D(https://steemitimages.com/DQmcqJrb2mZiQJXqyUcTtynbJ5JxaQS71A88p5TGSitj3jg/image.png)%0A%0A%EA%B3%84%EC%A0%95%EC%9D%84 %ED%95%98%EB%82%98 %EB%8D%94 %EC%B6%94%EA%B0%80%ED%95%B4%EB%B3%B4%EC%9E%90%0A!%5B%5D(https://steemitimages.com/DQmRQ7jpKD44ydU8QKe7y7KMgCyEhb8UbjPT3fUpofzkQZU/image.png)%0A%0AExit%EB%A1%9C %EC%BD%98%EC%86%94%EC%9D%84 %EC%A2%85%EB%A3%8C%ED%95%98%EB%A9%B4 geth%ED%94%84%EB%A1%9C%EC%84%B8%EC%8A%A4%EB%8F%84 %EC%A2%85%EB%A3%8C%EB%90%9C%EB%8B%A4. Ps%EB%AA%85%EB%A0%B9%EC%9C%BC%EB%A1%9C geth%ED%94%84%EB%A1%9C%EC%84%B8%EC%8A%A4%EA%B0%80 %EB%8F%99%EC%9E%91%ED%95%98%EC%A7%80 %EC%95%8A%EB%8A%94 %EA%B2%83%EC%9D%84 %ED%99%95%EC%9D%B8%ED%95%A0 %EC%88%98 %EC%9E%88%EB%8B%A4.%0A%0A$ ps -eaf %7C grep geth%0A!%5B%5D(https://steemitimages.com/DQmasTu78rdu5KxCMzdjTJwrRnq6uWR8KdZMjxaQAyPWQ6s/image.png)%0A%0A%ED%84%B0%EB%AF%B8%EB%84%90 %EC%B0%BD%EC%97%90%EC%84%9C%EB%8F%84 %EA%B3%84%EC%A0%95%EC%9D%84 %EC%83%9D%EC%84%B1%ED%95%A0 %EC%88%98 %EC%9E%88%EB%8B%A4.%0A%0A$ geth --datadir /Users/Humanscape/Desktop/data_testnet account new%0A!%5B%5D(https://steemitimages.com/DQmemQUH4M5zu81FpXoG8Hse4dECtwB3VRrtDqqSo8Po6Ew/image.png)%0A%0A%EA%B3%84%EC%A0%95%ED%99%95%EC%9D%B8%EB%8F%84 %EA%B0%80%EB%8A%A5%ED%95%98%EB%8B%A4.%0A!%5B%5D(https://steemitimages.com/DQmUF7b4vfZ2V3X4t3WxjBQfdKnxDHif1Z744e8EmXkQHqR/image.png)%0A%0A---\n",
      "json_metadata": "{\"tags\":[\"gasprice\",\"gas\",\"eoa\",\"geth\",\"ether\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\",\"image\":[\"https://steemitimages.com/DQmeSUZdUqBXFWrPfXiNjpTm9msVcFfK5932KxUrufDCvwB/image.png\",\"https://steemitimages.com/DQmcqJrb2mZiQJXqyUcTtynbJ5JxaQS71A88p5TGSitj3jg/image.png\",\"https://steemitimages.com/DQmRQ7jpKD44ydU8QKe7y7KMgCyEhb8UbjPT3fUpofzkQZU/image.png\",\"https://steemitimages.com/DQmasTu78rdu5KxCMzdjTJwrRnq6uWR8KdZMjxaQAyPWQ6s/image.png\",\"https://steemitimages.com/DQmemQUH4M5zu81FpXoG8Hse4dECtwB3VRrtDqqSo8Po6Ew/image.png\",\"https://steemitimages.com/DQmUF7b4vfZ2V3X4t3WxjBQfdKnxDHif1Z744e8EmXkQHqR/image.png\"]}",
      "parent_author": "",
      "parent_permlink": "gasprice",
      "permlink": "2-3-4",
      "title": "블록체인 애플리케이션 개발 실전 입문 2-3 4장"
    }
  ],
  "op_in_trx": 0,
  "timestamp": "2018-02-08T09:59:51",
  "trx_id": "81a875dadfa3ced547322dafd1169131c77c4cae",
  "trx_in_block": 45,
  "virtual_op": 0
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{
  "block": 19686756,
  "op": [
    "vote",
    {
      "author": "loowin",
      "permlink": "2-3-4",
      "voter": "centerizart",
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  "op_in_trx": 0,
  "timestamp": "2018-02-08T09:59:42",
  "trx_id": "a5a169977a8c7e5c9e5b90d9f7f1a7ff073255bc",
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{
  "block": 19686752,
  "op": [
    "comment",
    {
      "author": "loowin",
      "body": "@@ -221,8 +221,171 @@\n %EC%9E%88%EB%8B%A4.%0A%0A---\n+%0A%0Apersonal.newAccount %EB%AA%85%EB%A0%B9%EC%96%B4%EB%A5%BC %EC%9D%B4%EC%9A%A9%ED%95%98%EC%97%AC EOA%EB%A5%BC %EC%83%9D%EC%84%B1%ED%95%9C%EB%8B%A4.%0A%0A$ personal.newAccount(%22pass0%22)%0A!%5B%5D(https://steemitimages.com/DQmeSUZdUqBXFWrPfXiNjpTm9msVcFfK5932KxUrufDCvwB/image.png)\n",
      "json_metadata": "{\"tags\":[\"gasprice\",\"gas\",\"eoa\",\"geth\",\"ether\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\",\"image\":[\"https://steemitimages.com/DQmeSUZdUqBXFWrPfXiNjpTm9msVcFfK5932KxUrufDCvwB/image.png\"]}",
      "parent_author": "",
      "parent_permlink": "gasprice",
      "permlink": "2-3-4",
      "title": "블록체인 애플리케이션 개발 실전 입문 2-3 4장"
    }
  ],
  "op_in_trx": 0,
  "timestamp": "2018-02-08T09:59:30",
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{
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  "op": [
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    {
      "author": "loowin",
      "body": "이제 geth콘솔에서 계정을 만들고 ether를 송금해보자\n\n이더리움에는 두가지 종류의 계정이 있다.\n\n1) EOA는 일반 사용자가 사용하는 계정으로 비킬키를 관리한다. Ether를 송금하거나 계약을 실행할 수 있다.\n2) Contrat계정은 이름처럼 계양용 계정으로, 계약을 블록체인에 배포할 때 만들어지는 계정으로 다른 계정으로부터 메시지를 수신해 코드를 실행하고 계정에 메시지를 보낼 수 있다.\n\n---",
      "json_metadata": "{\"tags\":[\"gasprice\",\"gas\",\"eoa\",\"geth\",\"ether\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}",
      "parent_author": "",
      "parent_permlink": "gasprice",
      "permlink": "2-3-4",
      "title": "블록체인 애플리케이션 개발 실전 입문 2-3 4장"
    }
  ],
  "op_in_trx": 0,
  "timestamp": "2018-02-08T09:59:03",
  "trx_id": "8015dccaeb7c6a18731a59d0cae82c1d0b9e3d5c",
  "trx_in_block": 47,
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  "op": [
    "vote",
    {
      "author": "loowin",
      "permlink": "2-3",
      "voter": "loowin",
      "weight": 10000
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  "op_in_trx": 0,
  "timestamp": "2018-02-08T08:27:06",
  "trx_id": "7275674ccb7b4d28d86f388114c78fe91654b953",
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{
  "block": 19684912,
  "op": [
    "comment",
    {
      "author": "loowin",
      "body": "테스트 네트워크에서 Geth 실행하기\n\n\n시작하기 전에 2가지를 먼저 준비해야 한다.\n\n데이터 디렉터리, Genesis파일\n\n바탕화면에 data_testnet 폴더를 만들고\n그 폴더 안에 genesis.json 파일을 만든다.\n\n![스크린샷 2018-02-07 오후 10.47.47.png](https://steemitimages.com/DQmZCxdSeXdAJEydnL7ENBq4fJ2V2nsKibLTWbAkjKm7yeU/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-07%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%2010.47.47.png)\n\n genesis.json은 아래와 같다.\n\n{\n\t\"nonce\" : \"0x0000000000000042\",\n\t\"timestamp\" : \"0x0\",\n\t\"parentHash\" : \"0x0000000000000000000000000000000000000000000000000000000000000000\",\n\t\"extraData\" : \"0x0\",\n\t\"gasLimit\" : \"0x80000000\",\n\t\"difficulty\" : \"0x4000\",\n\t\"mixhash\" : \"0x0000000000000000000000000000000000000000000000000000000000000000\",\n\t\"coinbase\" : \"0x3333333333333333333333333333333333333333\",\n\t\"alloc\" : {}\n}\n\n---\n\nGeth를 초기화 한다.\n\n$ geth --datadir /Users/Humanscape/Desktop/data_testnet init /Users/Humanscape/Desktop/data_testnet/genesis.json \n\n![스크린샷 2018-02-06 오후 6.24.36.png](https://steemitimages.com/DQmV5zzScgR2gTx54DMk5ATd9LrdCHEdVZ45GvWHQ3XQEP5/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-06%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%206.24.36.png)\n\n초기화가 완료되면 geth를 실행한다.\n\n$ geth --networkid 4649 --nodiscover --maxpeers 0 --datadir /Users/Humanscape/Desktop/data_testnet console 2>> /Users/Humanscape/Desktop/data_testnet/geth.log\n\n![](https://steemitimages.com/DQmPuwgUaoC8DqPnEr5uo4efkjqCDHqSdmEC8aMTXZrvv4X/image.png)\n\n---\n\n다음 장에서 계정을 만들고 ether를 송금하는 예제를 진행하겠다.",
      "json_metadata": "{\"tags\":[\"ether\",\"geth\",\"datatestnet\",\"genesisjson\",\"genesis\"],\"image\":[\"https://steemitimages.com/DQmZCxdSeXdAJEydnL7ENBq4fJ2V2nsKibLTWbAkjKm7yeU/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-07%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%2010.47.47.png\",\"https://steemitimages.com/DQmV5zzScgR2gTx54DMk5ATd9LrdCHEdVZ45GvWHQ3XQEP5/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-06%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%206.24.36.png\",\"https://steemitimages.com/DQmPuwgUaoC8DqPnEr5uo4efkjqCDHqSdmEC8aMTXZrvv4X/image.png\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}",
      "parent_author": "",
      "parent_permlink": "ether",
      "permlink": "2-3",
      "title": "블록체인 애플리케이션 개발 실전 입문 2-3장"
    }
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      "permlink": "2-2",
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{
  "block": 19678765,
  "op": [
    "comment",
    {
      "author": "loowin",
      "body": "@@ -2023,16 +2023,291 @@\n n/geth%0A%0A\n+!%5B%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA 2018-02-06 %E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE 6.24.44.png%5D(https://steemitimages.com/DQmSskywEZM3PjufBbh5RZ3miT2ZfCwXyR1UEeLKeHS3k97/%25E1%2584%2589%25E1%2585%25B3%25E1%2584%258F%25E1%2585%25B3%25E1%2584%2585%25E1%2585%25B5%25E1%2586%25AB%25E1%2584%2589%25E1%2585%25A3%25E1%2586%25BA%25202018-02-06%2520%25E1%2584%258B%25E1%2585%25A9%25E1%2584%2592%25E1%2585%25AE%25206.24.44.png)%0A%0A\n %EC%9D%B4%EC%A0%9C geth%EC%84%A4\n",
      "json_metadata": "{\"tags\":[\"geth\",\"go-ethereum\",\"makegeth\"],\"image\":[\"https://steemitimages.com/DQmQY667kzajrWMRCunCnxQJZx271eATzDntD8hmwtCSfUX/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-06%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%204.07.47.png\",\"https://steemitimages.com/DQmcqtCNDNL9SvJVwXgMdiLpYj3G7jaTSmLbMwj9WskrWxc/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-06%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%204.05.24.png\",\"https://steemitimages.com/DQmeNhkPeETjm2Wbz1nLF89ExbjPjEpKRUXXc9DekbCXCBw/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-06%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%204.06.01.png\",\"https://steemitimages.com/DQmdymY6R93b17s6Gb243TvmCyaUoHRRJrsMb5d1xYjsqDF/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-06%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%204.10.56.png\",\"https://steemitimages.com/DQmV7gWMjmhUyCpGq9mGaUomLTzCcSyH1vuQvyTXK4awK2L/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-06%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%204.11.26.png\",\"https://steemitimages.com/DQmSskywEZM3PjufBbh5RZ3miT2ZfCwXyR1UEeLKeHS3k97/%E1%84%89%E1%85%B3%E1%84%8F%E1%85%B3%E1%84%85%E1%85%B5%E1%86%AB%E1%84%89%E1%85%A3%E1%86%BA%202018-02-06%20%E1%84%8B%E1%85%A9%E1%84%92%E1%85%AE%206.24.44.png\"],\"links\":[\"http://golang.org/dl\",\"https://github.com/ethereum/go-ethereum.git\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}",
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