Fix ChainTxData Parameter

[shohu]

Fix the following parameters for cban

        chainTxData = ChainTxData{
            // Data as of block 00000000000000000166d612d5595e2b1cd88d71d695fc580af64d8da8658c23 (height 446482).
            1483472411, // * UNIX timestamp of last known number of transactions
            184495391,  // * total number of transactions between genesis and that timestamp
                        //   (the tx=... number in the SetBestChain debug.log lines)
            3.2         // * estimated number of transactions per second after that timestamp
        };

[shohu]

Get blockhash of data synchronized on September 5

ubuntu@c0ban14-01:~$ c0ban-cli getblockchaininfo
{
  "chain": "main",
  "blocks": 704441,
  "headers": 704441,
  "bestblockhash": "0000000000000697fda530f8ade57a82029fd4939fd8a7c97bd649d2bb76b918",
  "difficulty": 455062.7470356631,
  "mediantime": 1504586118,
  "verificationprogress": 0.002809371385441663,
  "chainwork": "00000000000000000000000000000000000000000000004056b226984cefdae6",

get txid from block

$ c0ban-cli getblock 0000000000000697fda530f8ade57a82029fd4939fd8a7c97bd649d2bb76b918
{
  "hash": "0000000000000697fda530f8ade57a82029fd4939fd8a7c97bd649d2bb76b918",
  "confirmations": 1,
  "strippedsize": 276,
  "size": 276,
  "weight": 1104,
  "height": 704441,
  "version": 536870912,
  "versionHex": "20000000",
  "merkleroot": "e1c7faa08246434aa6f4c992b845db625e12f9af310cbba2817511131cf80ce8",
  "tx": [
    "e1c7faa08246434aa6f4c992b845db625e12f9af310cbba2817511131cf80ce8"
  ],
  "time": 1504586419,
  "mediantime": 1504586118,
  "nonce": 2924635880,
  "bits": "1a24de0b",
  "difficulty": 455062.7470356631,
  "chainwork": "00000000000000000000000000000000000000000000004056b226984cefdae6",
  "reward": 0,
  "previousblockhash": "0000000000001da0aea758f022d653a50f38bf7b7942ac3e142f6c6a6c0c44ad"
}

get transaction detail information

$ c0ban-cli getrawtransaction e1c7faa08246434aa6f4c992b845db625e12f9af310cbba2817511131cf80ce8 1
{
  "hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4c03b9bf0a04572cae5908fabe6d6d3d20273231392e3132322e392e31376d6dbefa0859ae285c040abf9a034cffff01000000000000001fffffc2f5d200000d2f6e6f64655374726174756d2f000000000200000000000000001976a914f28e1e4723e028af90c4f28943314080814eb5ec88ac00000000000000001976a9147009129d6d5c318884ec288c525b26cf0a2fac9e88ac00000000",
  "txid": "e1c7faa08246434aa6f4c992b845db625e12f9af310cbba2817511131cf80ce8",
  "hash": "e1c7faa08246434aa6f4c992b845db625e12f9af310cbba2817511131cf80ce8",
  "size": 195,
  "vsize": 195,
  "version": 1,
  "locktime": 0,
  "vin": [
    {
      "coinbase": "03b9bf0a04572cae5908fabe6d6d3d20273231392e3132322e392e31376d6dbefa0859ae285c040abf9a034cffff01000000000000001fffffc2f5d200000d2f6e6f64655374726174756d2f",
      "sequence": 0
    }
  ],
  "vout": [
    {
      "value": 0.00000000,
      "n": 0,
      "scriptPubKey": {
        "asm": "OP_DUP OP_HASH160 f28e1e4723e028af90c4f28943314080814eb5ec OP_EQUALVERIFY OP_CHECKSIG",
        "hex": "76a914f28e1e4723e028af90c4f28943314080814eb5ec88ac",
        "reqSigs": 1,
        "type": "pubkeyhash",
        "addresses": [
          "8dCNVvqf1WU64Qop8GnhEV49bx6sdeh9CP"
        ]
      }
    },
    {
      "value": 0.00000000,
      "n": 1,
      "scriptPubKey": {
        "asm": "OP_DUP OP_HASH160 7009129d6d5c318884ec288c525b26cf0a2fac9e OP_EQUALVERIFY OP_CHECKSIG",
        "hex": "76a9147009129d6d5c318884ec288c525b26cf0a2fac9e88ac",
        "reqSigs": 1,
        "type": "pubkeyhash",
        "addresses": [
          "8RJFGpj46ENtpMHyyVmK6zdvXbnicM5Dk3"
        ]
      }
    }
  ],
  "blockhash": "0000000000000697fda530f8ade57a82029fd4939fd8a7c97bd649d2bb76b918",
  "confirmations": 1,
  "time": 1504586419,
  "blocktime": 1504586419
}

[shohu]

1.UNIX timestamp of last known number of transactions

Get 1504586419 by following values.

$ c0ban-cli getblock 0000000000000697fda530f8ade57a82029fd4939fd8a7c97bd649d2bb76b918
{
  "hash": "0000000000000697fda530f8ade57a82029fd4939fd8a7c97bd649d2bb76b918",
   :
  "time": 1504586419,

2.total number of transactions between genesis and that timestamp

Run follow program. so, get 709843.

#!/usr/bin/python
# -*- coding: utf-8 -*-

import json
import requests

TOP_BLOCK_HASH='0000000000000697fda530f8ade57a82029fd4939fd8a7c97bd649d2bb76b918'

def get_json(block_id):
    url = "http://hoge:fuga@localhost:3882/"
    headers = {'content-type': 'application/json'}

    # Example echo method
    payload = {
        "method": "getblock",
        "params": [block_id],
        "jsonrpc": "1.0",
        "id": block_id,
    }
    return requests.post(
        url, data=json.dumps(payload), headers=headers).json()

def main():
    counter = 0
    tran_counter = 0

    # 1. ブロックを前におっていく。genesisblockになったら停止
    target_block_id = TOP_BLOCK_HASH
    while counter < 704441:
        # getblock
        res_json = get_json(target_block_id)
        #import pdb; pdb.set_trace()

        # transaction count
        tran_counter = tran_counter + len(res_json["result"]["tx"])

        # prevhash
        counter = counter + 1
        if counter % 500 == 0:
            print "counter = {}, tran_counter = {}".format(counter, tran_counter)

        target_block_id = res_json["result"]["previousblockhash"]
    print "finish. counter = {}, tran_counter = {}".format(counter, tran_counter)
if __name__ == "__main__":
    main()

3.estimated number of transactions per second after that timestamp

2(total transaction count) / [1 of transaction time] - [genesis block timestamp] 0.02665774824 = 709843 / (1504586419 - 1477958401)

[shohu]

https://github.com/shohu/c0ban/commit/f5223fe023aceb0e3c93530582b1a0cdb4170f82