BITCOIN_CORE_VERSION_DIR_AARCH64=bitcoin-25.1
BITCOIN_CORE_URL_AARCH64=https://bitcoincore.org/bin/bitcoin-core-25.1/bitcoin-25.1-aarch64-linux-gnu.tar.gz
BITCOIN_CORE_SHA256_AARCH64=69b49bd4eda484a8b8e0e806649e5b7ae9b93b3dbb9889af23696437359bc52c

# binaries and config root; data is elsewhere, in /ssd/bitcoind as per conf file.
BITCOIN_HOME=/home/bitcoind
# no root slash since it's combined with other path prefixes.
BITCOIN_SVDIR=etc/sv/bitcoind

bitcoin_core_bin_install() {
    cd $BITCOIN_HOME
    local targz=$BITCOIN_CORE_VERSION_DIR_AARCH64.tar.gz
    test -f $BITCOIN_CORE_VERSION_DIR_AARCH64/bin/bitcoind && return 0;
    curl -sSL -o $targz "$BITCOIN_CORE_URL_AARCH64"
    if [ $? -ne 0 ]; then
        printf "ERROR: unable to download $BITCOIN_CORE_URL_AARCH64\n" 1>&2
        return 1
    fi
    printf "$BITCOIN_CORE_SHA256_AARCH64 $targz" | sha256sum --check
    [ $? -ne 0 ] && return 1
    tar -C $BITCOIN_HOME --no-same-owner -xf $targz
    rm -f $targz
    return $?
}

bitcoind_svc_install() {
    # service directories
    mkdir -p /$BITCOIN_SVDIR
    mkdir -p /$BITCOIN_SVDIR/log

    # logging facility
    if [ ! -f /$BITCOIN_SVDIR/log/run ]; then
        cp $SYSUPDATES_ROOTDIR/files/$BITCOIN_SVDIR/log/run /$BITCOIN_SVDIR/log/
        chmod +x /$BITCOIN_SVDIR/log/run
    fi

    # the actual bitcoin service
    cat <<EOF > /$BITCOIN_SVDIR/run.new
#!/bin/sh
exec chpst -u bitcoind $BITCOIN_HOME/$BITCOIN_CORE_VERSION_DIR_AARCH64/bin/bitcoind -conf=$BITCOIN_HOME/mainnet.conf 2>&1
EOF
    chmod +x /$BITCOIN_SVDIR/run.new
    test -f /$BITCOIN_SVDIR/run && diff /$BITCOIN_SVDIR/run /$BITCOIN_SVDIR/run.new
    if [ $? -ne 0 ]; then
        mv /$BITCOIN_SVDIR/run.new /$BITCOIN_SVDIR/run
        # don't touch the actual service if on manual control - the down file
        test -f /$BITCOIN_SVDIR/down && return 0
        sv -w 600 stop bitcoind || printf "ERROR: sv stop bitcoind failed\n" 1>&2
        sv start bitcoind || printf "ERROR: sv start bitcoind failed\n" 1>&2
    fi
    rm -f /$BITCOIN_SVDIR/run.new
}

bitcoin_cli_install() {
    mkdir -p /opt/bin
    cat <<EOF > /opt/bin/bitcoin-cli.sh
#!/bin/sh
set -eu
CLI=$BITCOIN_HOME/$BITCOIN_CORE_VERSION_DIR_AARCH64/bin/bitcoin-cli
DATA=/ssd/bitcoind/mainnet
CHAIN=main
exec doas -u bitcoind \$CLI -datadir=\$DATA -chain=\$CHAIN "\$@"
EOF
    chmod +x /opt/bin/bitcoin-cli.sh
}

bitcoin_apply() {
    bitcoin_core_bin_install || return 1
    bitcoind_svc_install || return 1
    bitcoin_cli_install || return 1
}