Block decoder in bash

blockdecoder.sh

#!/bin/bash
unset LASTBLOCK

while true
do
        if [ -e LAST_BLOCK_EXAMINED ]
        then
                LASTBLOCK=$( cat LAST_BLOCK_EXAMINED )
        fi
        if [ -z "$LASTBLOCK" ]
        then
                LASTBLOCK=0
        fi
        CURBLOCK=$( namecoind getinfo|grep -i blocks|awk '{ print $3 }'|sed -e 's/,//g' )
        if [ "$CURBLOCK" -gt "$LASTBLOCK" ]
        then
#               echo i have work to do: $(( $CURBLOCK - $LASTBLOCK)) blocks
                for i in $( seq $(( $LASTBLOCK + 1 )) $CURBLOCK )
                do
#                       echo working on "$i", from $(( $LASTBLOCK + 1 )) to $CURBLOCK
                        echo -n $i.. $'\r' >&2
                        if [ -e TRIGGERS ]
                        then
                                while read j
                                do
                                        TRIGGERBLOCK=$( echo $j | cut -d ' ' -f 1 )
                                        NAME=$( echo $j | cut -d ' ' -f 2 )
                                        REST=$( echo $j | cut -d ' ' --complement -f 1,2 )
                                        if [ "$i" -ge "$TRIGGERBLOCK" ]
                                        then
                                                echo $'\n' trigger: $REST >&2
                                                echo -n $NAME: >> named_raw_output
                                                $REST
                                        else
                                                echo $TRIGGERBLOCK $NAME $REST >> /tmp/$$
                                        fi
                                done < TRIGGERS
#                               mv /tmp/$$ TRIGGERS
                        fi
                        namecoind getblockbycount "$i" | grep scriptPubKey|grep OP_2DROP|grep ': "2' | while read NEWITEM
                        do
                                NEWNAME=$( echo "$NEWITEM" | awk '{ print $4 }'|xxd -r -p )
                                NEWVAL=$( echo "$NEWITEM" | awk '{ print $6 }'|xxd -r -p )

                                if [ ! -z "$NEWITEM" ]
                                then
                                        MYTIME=$( namecoind getblockbycount "$i" | grep '"time"' | awk '{ print $3 }' | sed -e 's/,//g' )
                                        echo $MYTIME:$( date +"%Y/%m/%d:%H:%M:%S" -d @"$MYTIME" ):"$i":"$NEWNAME := $NEWVAL"
                                fi
                        done
                        namecoind getblockbycount "$i" | grep scriptPubKey|grep OP_2DROP|grep ': "3' | while read NEWITEM
                        do
                                NAMEUPDATE=$( echo "$NEWITEM" | awk '{ print $4 }'|xxd -r -p )
                                UPDATEVAL=$( echo "$NEWITEM" | awk '{ print $5 }'|xxd -r -p )
                                CHECKOP=$( echo "$NEWITEM" | awk '{ print $6 }' )

                                if [ ! -z "$NEWITEM" -a "$CHECKOP" != "123" ]
                                then
                                        MYTIME=$( namecoind getblockbycount "$i" | grep '"time"' | awk '{ print $3 }' | sed -e 's/,//g' )
                                        echo $MYTIME:$( date +"%Y/%m/%d:%H:%M:%S" -d @"$MYTIME" ):"(update)":"$i":"$NAMEUPDATE := $UPDATEVAL"
                                fi
                        done
                done
#               echo -n "update file with $i blocks.." >&2
                echo -n "$i" > LAST_BLOCK_EXAMINED
#               echo ok.
        fi
        sleep 50
done