Build and run Bitcoin Signet

runsignet.sh

#!/usr/bin/env bash
#-----------------------------------------------------------------------------------------------------#
# Build and run Bitcoin Signet - developed by Kalle Alm (@kallewoof)                                  #
#                                                                                                     #
# Follow the development on GitHub: https://github.com/bitcoin/bitcoin/pull/18267                     #
#                                                                                                     #
# For this script to run you'll have to install several packages first (boost, libevent, libzmq3)     #
# Check this doc for more info: https://github.com/bitcoin/bitcoin/blob/master/doc/build-unix.md      #
#                                                                                                     #
# Script usage:                                                                                       #
#                                                                                                     #
# Save it as 'runsignet.sh', then execute: chmod +x ./runsignet.sh                                    #
# Run it with: ./runsignet.sh and wait for it to complete.                                            #
#                                                                                                     #
#------------------------------------------------------------------------------------------------------

# adapt to your root path
DISK_ROOT=`pwd`

SIGNET_REPO="https://github.com/kallewoof/bitcoin.git"
SIGNET_REPO_BRANCH="2003-signet-consensus"

SIGNET_CLONE_NAME="signet"
SIGNET_DATADIR_NAME="signet_datadir"
SIGNET_DATADIR_BACKUP_NAME="signet_datadir_backup"
SIGNET_CLONE_ROOT="${DISK_ROOT}/${SIGNET_CLONE_NAME}"
SIGNET_DATADIR="${SIGNET_CLONE_ROOT}/src/${SIGNET_DATADIR_NAME}"
SIGNET_DATADIR_BACKUP="${DISK_ROOT}/${SIGNET_DATADIR_BACKUP_NAME}"
SIGNET_BITCOIND="${SIGNET_CLONE_ROOT}/src/bitcoind"
SIGNET_BITCOIN_CLI="${SIGNET_CLONE_ROOT}/src/bitcoin-cli"

RPC_USER="user"$(env LC_ALL=C tr -dc 'A-Za-z0-9_!@$%^&*()\-+=' < /dev/urandom | head -c 30)
RPC_PWD=$(env LC_ALL=C tr -dc 'A-Za-z0-9_!@$%^&*()\-+=' < /dev/urandom | head -c 30)
DEFAULT_BITCOIN_CONF="signet=1\n[signet]\ndaemon=1\nupnp=1\nrest=1\nlisten=1\nrpcuser=${RPC_USER}\nrpcpassword=${RPC_PWD}"

MAKE="make"
MAKE_FLAGS="-j4"

# check for datadir backup
# if it doesn't exist, create one with default bitcoin.conf in it
if [ ! -d "$SIGNET_DATADIR_BACKUP" ]; then
  echo "Creating backup datadir ${SIGNET_DATADIR_BACKUP}"
  mkdir ${SIGNET_DATADIR_BACKUP}
  mkdir ${SIGNET_DATADIR_BACKUP}/signet
  mkdir ${SIGNET_DATADIR_BACKUP}/signet/wallets
  echo "Creating default bitcoin.conf"
  echo -e ${DEFAULT_BITCOIN_CONF} > ${SIGNET_DATADIR_BACKUP}/bitcoin.conf
fi

# make backup of existing bitcoin.conf and wallet files
if [ -d "$SIGNET_DATADIR" ]; then
   echo "Copying existing wallet files to ${SIGNET_DATADIR_BACKUP}"
   cp -rv ${SIGNET_DATADIR}/signet/wallets/* ${SIGNET_DATADIR_BACKUP}/signet/wallets
   echo "Moving existing bitcoin.conf to ${SIGNET_DATADIR_BACKUP}"
   mv ${SIGNET_DATADIR}/bitcoin.conf ${SIGNET_DATADIR_BACKUP}
fi

# remove existing local clone
if [ -d "$SIGNET_CLONE_ROOT" ]; then
  echo "Removing existing ${SIGNET_CLONE_ROOT} source directory."
  rm -rf ${SIGNET_CLONE_ROOT}
fi

# get a fresh clone and switch to signet branch
echo -e "\n"
echo "-----------------------------------"
echo "  Getting Bitcoin Signet sources   "
echo "-----------------------------------"
echo -e "\n"
git clone ${SIGNET_REPO} ${SIGNET_CLONE_NAME}
cd ${SIGNET_CLONE_ROOT}
git checkout ${SIGNET_REPO_BRANCH}
git pull


# Raspberry Pi 4 must build BDB4
if [[ "$OSTYPE" == "linux-gnueabihf"* ]]; then
   # compile and install BDB
   echo -e "\n"
   echo "---------------------------"
   echo "  Installing BerkeleyDB 4  "
   echo "---------------------------"
   echo -e "\n"
   BDB_PREFIX="${SIGNET_CLONE_ROOT}/db4"
   make_bdb() {
      ./contrib/install_db4.sh `pwd`
   }

   make_bdb
fi

# configure and compile signet sources
echo -e "\n"
echo "-------------------------------------------"
echo "  Configuring & Compiling Bitcoin Signet   "
echo "-------------------------------------------"
echo -e "\n"
BOOST_CONFIG_FLAGS=""
GUI_FLAGS="--without-gui"
TEST_FLAGS="--disable-tests"
BENCH_FLAGS="--disable-bench"
SHARED_FLAGS="--disable-shared"

if [[ "$OSTYPE" == "linux-gnueabihf"* ]]; then
   BOOST_CONFIG_FLAGS="--with-boost-libdir=/usr/lib/arm-linux-gnueabihf"
fi

make_bitcoind() {
   ./autogen.sh
   ./configure "BDB_LIBS='-L${BDB_PREFIX}/lib -ldb_cxx-4.8'" "BDB_CFLAGS='-I${BDB_PREFIX}/include'" "${TEST_FLAGS}" "${BENCH_FLAGS}" "${SHARED_FLAGS}" "${GUI_FLAGS}" "${BOOST_CONFIG_FLAGS}"
  "${MAKE}" "${MAKE_FLAGS}"
}

make_bitcoind

# copy backup datadir and start Bitcoin Signet daemon
echo -e "\n"
echo "--------------------------------------------"
echo "  Setting up Bitcoin Signet Configuration   "
echo "--------------------------------------------"
echo -e "\n"
mkdir ${SIGNET_DATADIR}
cp -rv ${SIGNET_DATADIR_BACKUP}/* ${SIGNET_DATADIR}
echo -e "\n"
echo "---------------------------"
echo "  Starting Bitcoin Signet  "
echo "---------------------------"
echo -e "\n"
run_bitcoind() {
  "${SIGNET_BITCOIND}" "-datadir=${SIGNET_DATADIR}"
}

run_bitcoind

# verify connection
echo -e "\n"
echo "-------------------------------------"
echo "      Verifying Bitcoin Signet       "
echo "            Please Wait              "
echo "-------------------------------------"
echo -e "\n"
check_connections() {
   sleep 10s
   "${SIGNET_BITCOIN_CLI}" "-datadir=${SIGNET_DATADIR}" "getconnectioncount"
}

conncount=$(check_connections)

if [ conncount > 0 ]; then
   echo "Success!"
   echo "Active connections: ${conncount}"
else
   echo "Failed!"
   echo "No connections. Check your local network settings."
fi

check_blocks() {
   "${SIGNET_BITCOIN_CLI}" "-datadir=${SIGNET_DATADIR}" "getblockcount"
}

blockcount=$(check_blocks)

if [ blockcount >= 1 ]; then
   echo "Success!"
   echo "Block count: ${blockcount}"
else
   echo "Failed!"
   echo "No blocks. Check your local network settings."
fi

# get Signet bitcoins
echo -e "\n"
echo "-------------------------------------------------"
echo "  Generate new address and get sBTC from faucet  "
echo "-------------------------------------------------"
echo -e "\n"
FAUCET_URL=https://signet.bc-2.jp/claim
get_address() {
   "${SIGNET_BITCOIN_CLI}" "-datadir=${SIGNET_DATADIR}" "getnewaddress"
}

address=$(get_address)
address_param="address="${address}

echo "Address: "${address}

get_coins() {
   curl "-d" $address_param "-H" "Content-Type: application/x-www-form-urlencoded" "${FAUCET_URL}"
}

get_coins

echo -e "\n"
echo "-----------------------------------------------"
echo "         Have fun with Bitcoin Signet!         "
echo "-----------------------------------------------"
echo -e "\n"