update082.md

dPoW 0.8.2 update information

Update Litecoin Core to v0.21.4

The main purpose of this update is to upgrade the outdated Litecoin Core 0.16.x, still used on notaries, to the latest version v0.21.4. Since a resync is required (as explained here) when updating from pre-MWEB versions, we need to prepare in advance. Specifically, build the latest litecoind and perform a full sync from scratch before the transition. The manual below explains how to achieve this without losing notarization counts and without stopping LTC notarizations.

Build latest Litecoin:

cd ~
git clone https://github.com/litecoin-project/litecoin litecoin.021
cd litecoin.021
git checkout beae01d # https://github.com/litecoin-project/litecoin/tree/v0.21.4
# apply patches from PR#990 to build dependencies with gcc-11
wget https://github.com/litecoin-project/litecoin/pull/990.diff
git apply -v 990.diff
# build as described here https://komodoplatform.com/en/docs/notary/
make -C ${PWD}/depends v=1 NO_PROTON=1 NO_QT=1 HOST=$(depends/config.guess) -j$(nproc --all)
./autogen.sh
CXXFLAGS="-g0 -O2" CONFIG_SITE="$PWD/depends/$(depends/config.guess)/share/config.site" ./configure --disable-tests --disable-bench --without-miniupnpc -enable-experimental-asm --with-gui=no --disable-bip70
make V=1 -j$(nproc --all)

Sync latest Litecoin from scratch:

mkdir -p ~/.litecoin.021
echo -e "txindex=1\nrpcport=9334\nserver=1\nlisten=0" > ~/.litecoin.021/litecoin.conf
./src/litecoind -datadir=$HOME/.litecoin.021 -daemon
tail -F ~/.litecoin.021//debug.log # sync monitoring, when it synced till 100%, stop it
./src/litecoin-cli -datadir=$HOME/.litecoin.021 stop
rm ~/.litecoin.021/litecoin.conf

Swap data folders and sources folders:

cd ~
~/litecoin/src/litecoin-cli stop && sleep 5 # stop your old daemon
cp ~/.litecoin/litecoin.conf ~/.litecoin.021 # copy .conf and wallet.dat in new folder
cp ~/.litecoin/wallet.dat ~/.litecoin.021
mv ~/.litecoin ~/.litecoin.016 # swap folders
mv ~/litecoin ~/litecoin.016
mv ~/.litecoin.021 ~/.litecoin
mv ~/litecoin.021 ~/litecoin

Start the new litecoin daemon

Start litecoind as usual. If you use scripts to start all daemons, modify them to include the -daemon argument to prevent console spam, and remove the -pubkey argument, as litecoind does not recognize it and will quit shortly instead of launching. Your daemon launch command should look like this:

~/litecoin/src/litecoind -daemon

Restart Iguana

# Update dPoW repo
cd ~/dPoW
git checkout master
git pull

# Restart Iguana
cd iguana
./m_notary_build

pkill -9 iguana
./m_notary_main
./m_notary_3rdparty_docker # or ./m_notary_3rdparty if not using docker

Make sure notarisations are progressing.

Stop KDF

cd ~/notary_docker_3p
docker compose stop mm2
docker compose rm mm2
git pull
./setup nobuild