Sugarchain Yumekawa

https://sugarchain.org

The Meaning of Yumekawa

Sugarchain's first node software is called Yumekawa (夢川). It can be translated in some ways.

• "Yume (夢)" means dream and "Kawa (川)" means river. So its Dream River in japanese.
• The second letter "Kawa" stands for "Kawaii (可愛い)". In this case the meaning is Dreamy Cute.
• Also Yumekawa is replaces the word Core (ie: Bitcoin Core). We think it sounds a bit centralized.

License

Sugarchain Yumekawa is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

• Copyright (c) 2009-2010 Satoshi Nakamoto
• Copyright (c) 2009-2018 The Bitcoin Core developers
• Copyright (c) 2013-2019 Alexander Peslyak - Yespower 1.0.1
• Copyright (c) 2016-2018 The Zcash developers - DigiShieldZEC
• Copyright (c) 2018-2020 The Sugarchain Yumekawa developers

Minimum Requirement

• CPU: 1 Core
• RAM: 2048 MB (at least 3 GB swap)
• DISK: HDD 5 GB

Depends on Bitcoin Core

Exactly the same as dependencies of Bitcoin Core v0.16.3.

• Debian 10 (Recommended, No PPA)

  sudo apt-get install -y \
  software-properties-common build-essential libtool autotools-dev automake pkg-config \
  libssl-dev libevent-dev bsdmainutils libboost-all-dev \
  libminiupnpc-dev libzmq3-dev libqt5gui5 libqt5core5a \
  libqt5dbus5 qttools5-dev qttools5-dev-tools libprotobuf-dev \
  protobuf-compiler libqrencode-dev help2man

• PPA is only for Ubuntu. No libdb4.8-dev and libdb4.8++-dev packages on Debian.

• Old Ubuntu

  * Ubuntu 16.04 ```bash sudo add-apt-repository -y ppa:bitcoin/bitcoin && \ sudo apt-get update && \ sudo apt-get install -y \ libdb4.8-dev libdb4.8++-dev \ software-properties-common build-essential libtool autotools-dev automake pkg-config \ libssl-dev libevent-dev bsdmainutils libboost-all-dev \ libminiupnpc-dev libzmq3-dev libqt5gui5 libqt5core5a \ libqt5dbus5 qttools5-dev qttools5-dev-tools libprotobuf-dev \ protobuf-compiler libqrencode-dev help2man ``` * Ubuntu 18.04+ ```bash sudo add-apt-repository -y ppa:luke-jr/bitcoincore && \ sudo apt-get update && \ sudo apt-get install -y \ libdb4.8-dev libdb4.8++-dev \ software-properties-common build-essential libtool autotools-dev automake pkg-config \ libssl-dev libevent-dev bsdmainutils libboost-all-dev \ libminiupnpc-dev libzmq3-dev libqt5gui5 libqt5core5a \ libqt5dbus5 qttools5-dev qttools5-dev-tools libprotobuf-dev \ protobuf-compiler libqrencode-dev help2man ```

Build

• Debian 10+ (Recommended, No PPA)

  ./autogen.sh && \
  ./contrib/install_db4.sh `pwd` && \
  export BDB_PREFIX=$PWD/db4 && \
  ./configure BDB_LIBS="-L${BDB_PREFIX}/lib -ldb_cxx-4.8" BDB_CFLAGS="-I${BDB_PREFIX}/include" && \
  make -j$(nproc) && \
  make check -j$(nproc)

• (optional) Following can be deleted rm -rf db4/ && rm -f db-4.8.30.NC.tar.gz

• Old Ubuntu

  * Ubuntu 16.04+ ```bash ./autogen.sh && \ ./configure && \ make -j$(nproc) && \ make check -j$(nproc) ```

Options after Build

• (optional) Reduce binary size using strip (about 90% file size reduction)

  strip ./src/sugarchain-cli && \
  strip ./src/sugarchaind && \
  strip ./src/qt/sugarchain-qt && \
  strip ./src/sugarchain-tx && \
  strip ./src/test/test_sugarchain

• (optional) After bump version on configure.ac, update binary docs (manpages) using help2man .1 files

  make -j$(nproc) && ./contrib/devtools/gen-manpages.sh

• (optional) build for Windows and OSX you may need --disable-shared option with make.

• (optional) Add seeds/nodes from DNSSEED
  https://github.com/sugarchain-project/sugarchain/tree/master-v0.16.3/contrib/seeds

Unit Test

All Sugarchain Yumekawa developers should execute this unit test. Some updates may break these tests in some occasions.

• Test All

  ./src/test/test_sugarchain test_bitcoin --log_level=test_suite

• (optional) Test Partially: ie blockencodings_tests

  ./src/test/test_sugarchain test_bitcoin --log_level=test_suite --run_test=blockencodings_tests

• (optional) Test QT (GUI)

  ./src/qt/test/test_sugarchain-qt

Run

The options -rpcuser, -rpcpassword, and -printtoconsole are optional. server=1 needed by RPC servers or cpuminer when solo-mining.

• Mainnet: debug mode: net for Network

  ./src/qt/sugarchain-qt -server=1 -rpcuser=rpcuser -rpcpassword=rpcpassword -debug=net -printtoconsole

• Testnet

  ./src/qt/sugarchain-qt -testnet

• Regtest

  ./src/qt/sugarchain-qt -regtest

• Reference
  https://en.bitcoin.it/w/index.php?title=Running_Bitcoin&oldid=66644

CLI

• -prunedebuglogfile: Prune (limit) filesize of debug.log

  ./src/qt/sugarchain-qt -prunedebuglogfile

  2020-09-15 19:41:34 DEBUG.LOG PRUNED at 10000063

Known Issues

• Transaction too large:
  • This is a part of BTC, and hopefully will be fixed in next Taproot Softfork.
• Slow update balance on wallet:
  • This slow is a part of BTC.
  • Update total balance every minute (12 blocks) interval.
  • A workaround at this moment. source
• Poor performance on ARM CPUs (32/64-Bit):
  • No ARM optimization for Yespower yet.
• Poor performance on 32-Bit OS:
  • No SSE2 optimization for Yespower yet. source
• Slow startup on low memory machines:
  • Startup can take up to some hours on 1cpu 1024ram (+swap 3GB) VPS.
  • Workaround is just increase RAM at least 2 GB.

Release Process using GITIAN

• All Sugarchain Yumekawa developers should do following GITIAN release process. It's the safest way to distribute binaries to people.
• Please use GITIAN release with checking PGP signature, or compile it yourself on your own machine.

https://gist.github.com/cryptozeny/3501c77750541208b9dd1a9e9719fc53