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fanquake ecbaf20937
Merge #17393: doc: Added regtest config for linearize script 
582e66b6e75d58033987a7b0474226cfdd724ce0 doc: Added regtest config for linearize script (Gr0kchain)

Pull request description:

  Updated the example-linearize.cfg file to include support for the regtest chain network config which is used by the ./linearize-data.py

  Problem:
  Without the regtest magic, genesis hash and path config, the `linearize-data.py` script cannot generate a bootstrap.dat file.

  Example:

  ./linearize-data.py ./linearize.cfg
  Read 102 hashes
  Genesis block not found in hashlist

  Solution:

  Added netmagic, genesis and input example parameters to file.

  Resolution

  1. Starting bitcoind in regtest mode
  2. bitcoin-cli generatetoaddress 101 $(bitcoin-cli getnewaddress)
  3. ./linearize-hashes.py ./linearize.cfg > ./hashlist.txt
  4. ./linearize-data.py ./linearize.cfg

  ```
  $ ./linearize-data.py ./linearize.cfg
  Read 102 hashes
  Input file /Users/gr0kchain/.bitcoin/regtest/blocks/blk00000.dat
  Output file /Users/gr0kchain/Downloads/bootstrap.dat
  Done (102 blocks written)
  ```

ACKs for top commit:
  fanquake:
    ACK 582e66b6e75d58033987a7b0474226cfdd724ce0

Tree-SHA512: 699e92e740e68e2e5190ba37538efbbe3e4d4e725ebd6af704a0cf5517683b691754f7ea097bf840845d2b53b793c63258d406e9bd37922db810cf58bed053c3
2021-07-14 18:44:42 -05:00
..
example-linearize-testnet.cfg Some Dashification (#3513) 2020-06-11 11:39:04 +03:00
example-linearize.cfg Merge #17393: doc: Added regtest config for linearize script 2021-07-14 18:44:42 -05:00
linearize-data.py Merge #17336: scripts: search for first block file for linearize-data with some block files pruned 2021-07-14 18:43:56 -05:00
linearize-hashes.py Merge #12987: tests/tools: Enable additional Python flake8 rules for automatic linting via Travis 2020-07-22 12:12:46 -05:00
README.md Merge #10956: Fix typos 2020-01-01 21:31:39 -06:00

README.md

Linearize

Construct a linear, no-fork, best version of the Dash blockchain. The scripts run using Python 3 but are compatible with Python 2.

Step 0: Install dash_hash

https://github.com/dashpay/dash_hash

Step 1: Download hash list

$ ./linearize-hashes.py linearize.cfg > hashlist.txt

Required configuration file settings for linearize-hashes:

  • RPC: datadir (Required if rpcuser and rpcpassword are not specified)
  • RPC: rpcuser, rpcpassword (Required if datadir is not specified)

Optional config file setting for linearize-hashes:

  • RPC: host (Default: 127.0.0.1)
  • RPC: port (Default: 9998)
  • Blockchain: min_height, max_height
  • rev_hash_bytes: If true, the written block hash list will be byte-reversed. (In other words, the hash returned by getblockhash will have its bytes reversed.) False by default. Intended for generation of standalone hash lists but safe to use with linearize-data.py, which will output the same data no matter which byte format is chosen.

The linearize-hashes script requires a connection, local or remote, to a JSON-RPC server. Running dashd or dash-qt -server will be sufficient.

Step 2: Copy local block data

$ ./linearize-data.py linearize.cfg

Required configuration file settings:

  • output_file: The file that will contain the final blockchain. or
  • output: Output directory for linearized blocks/blkNNNNN.dat output.

Optional config file setting for linearize-data:

  • debug_output: Some printouts may not always be desired. If true, such output will be printed.
  • file_timestamp: Set each file's last-accessed and last-modified times, respectively, to the current time and to the timestamp of the most recent block written to the script's blockchain.
  • genesis: The hash of the genesis block in the blockchain. (default is '00000ffd590b1485b3caadc19b22e6379c733355108f107a430458cdf3407ab6', mainnet)
  • input: dashd blocks/ directory containing blkNNNNN.dat
  • hashlist: text file containing list of block hashes created by linearize-hashes.py.
  • max_out_sz: Maximum size for files created by the output_file option. (Default: 1000*1000*1000 bytes)
  • netmagic: Network magic number. (default is 'bf0c6bbd', mainnet)
  • out_of_order_cache_sz: If out-of-order blocks are being read, the block can be written to a cache so that the blockchain doesn't have to be sought again. This option specifies the cache size. (Default: 100*1000*1000 bytes)
  • rev_hash_bytes: If true, the block hash list written by linearize-hashes.py will be byte-reversed when read by linearize-data.py. See the linearize-hashes entry for more information.
  • split_timestamp: Split blockchain files when a new month is first seen, in addition to reaching a maximum file size (max_out_sz).