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#!/bin/sh
# -*- sh -*-
# vim: ft=sh

: << =cut

=head1 NAME

bitcoind_mempool - Plugin to monitor the size of the mempool

=head1 CONFIGURATION

 [bitcoind*]
    user bitcoin
    env.binary bitcoin-cli
    env.data_dir /var/lib/bitcoin

=head1 AUTHOR

Cedric Felizard

=head1 LICENSE

AGPLv3+

=head1 MAGIC MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=cut

METRIC=${0##*/bitcoind_mempool_}
case $METRIC in
  size|bytes);;
  *) exit 1;;
esac

BINARY=${binary:-"/usr/bin/bitcoin-cli"}
DATA_DIR=${data_dir:-"/var/lib/bitcoin"}

if [ "$1" = "autoconf" ]; then
    autoconf="yes"

    command -v $BINARY >/dev/null || autoconf="no"

    echo $autoconf
    exit 0
fi

if [ "$1" = "config" ]; then
    echo "graph_title Mempool ${METRIC}"
    echo "graph_vlabel ${METRIC}"
    echo "graph_category bitcoind"
    echo "${METRIC}.label mempool (${METRIC})"
    exit 0
fi

mempool="$($BINARY -datadir=$DATA_DIR getmempoolinfo)"
value=$(echo "$mempool" | grep $METRIC | grep -o '[0-9]*')

echo "${METRIC}.value $(echo $value)"