testnet

## testnet.sh
## Tested with jq 1.5.1 on Ubuntu 16.04.1
##
#!/bin/bash

##SECRET="\"YOUR PASSPHRASE\"" ## Uncomment this line if you want this script to reenable forging when done
SRV=127.0.0.1:7000

## Thanks to cc001 and hagie for improvements here
find_newest_snap_rebuild(){

    SNAPSHOTS=(
      https://downloads.lisk.io/lisk/test/blockchain.db.gz  ## Official
      https://testnet-snapshot.liskwallet.net/blockchain.db.gz      ## isabella
      https://testnet-snapshot.lisknode.io/blockchain.db.gz         ## Gr33nDrag0n
    )

    BESTSNAP=""
    BESTTIMESTAMP=0
    BESTSNAPLENGTH=0

    for SNAP in ${SNAPSHOTS[@]}
    do
      echo "$SNAP"
      SNAPSTATUS=$(curl -sI "$SNAP" | grep "HTTP" | cut -f2 -d" ")
      SNAPLENGTH=$(curl -sI "$SNAP" | grep "Length" | cut -f2 -d" ")
      SNAPLENGTH="${SNAPLENGTH//[$'\t\r\n ']}"
      if [ "$SNAPSTATUS" -eq "200" ]
      then
          TIME=$(curl -sI "$SNAP" | grep Last-Modified | cut -f2 -d:)
          TIMESTAMP=$(date -d "$TIME" +"%s")
          echo $TIMESTAMP
          if [ "$TIMESTAMP" -gt "$BESTTIMESTAMP" ] && [ "$SNAPLENGTH" -gt "$BESTSNAPLENGTH" ]; ## Make sure it is the newest and the largest
          then
             BESTSNAP=$SNAP
             BESTTIMESTAMP=$TIMESTAMP
             BESTSNAPLENGTH=$SNAPLENGTH
          fi
       fi
    done

    REPO=${BESTSNAP%/blockchain.db.gz}
    echo "Newest snap: $BESTSNAP | Rebuilding from $REPO"

    ## bash lisk.sh stop ## Trying to figure out why rebuilding from block 0.  Attempting to stop first to make sure the DB shuts down too
    ## sleep 5
    bash lisk.sh rebuild -u $REPO
}

top_height(){
    ## Get height of your 100 peers and save the highest value
    ## Thanks to wannabe_RoteBaron for this improvement
    HEIGHT=$(curl -s http://$SRV/api/peers | jq '.peers[].height' | sort -nu | tail -n1)
    ## Make sure height is not empty, if it is empty try the call until it is not empty
    while [ -z "$HEIGHT" ]
    do
        sleep 1
        HEIGHT=$(curl -s http://$SRV/api/peers | jq '.peers[].height' | sort -nu | tail -n1)
    done
}

## Get height of this server and see if it's greater or within 4 of the highest
local_height() {
    ## Make sure local height is not empty, if it is empty try the call until it is not empty
    CHECKSRV=`curl -s "http://$SRV/api/loader/status/sync"| jq '.height'`
    while [ -z "$CHECKSRV" ]
    do
        sleep 1
        CHECKSRV=`curl -s "http://$SRV/api/loader/status/sync"| jq '.height'`
    done
    diff=$(( $HEIGHT - $CHECKSRV ))
    if [ "$diff" -gt "4" ]
    then
        echo "Reloading! Local: $CHECKSRV, Highest: $HEIGHT, Diff: $diff"
        cd ~/lisk-test/
        bash lisk.sh reload
        sleep 60

        ## Make sure local height is not empty, if it is empty try the call until it is not empty
        CHECKSRV=`curl -s "http://$SRV/api/loader/status/sync"| jq '.height'`
        while [ -z "$CHECKSRV" ]
        do
            sleep 1
            CHECKSRV=`curl -s "http://$SRV/api/loader/status/sync"| jq '.height'`
        done

        ## Rebuild if still out of sync after reload
        diff=$(( $HEIGHT - $CHECKSRV ))
        if [ "$diff" -gt "6" ]
        then
            echo "Rebuilding! Local: $CHECKSRV, Highest: $HEIGHT, Diff: $diff"
            find_newest_snap_rebuild
            #sleep 420
            ## Thank you corsaro for this improvement
            while true; do
                s1=`curl -k -s "http://$SRV/api/loader/status/sync"| jq '.height'`
                sleep 60
                s2=`curl -k -s "http://$SRV/api/loader/status/sync"| jq '.height'`

                diff=$(( $s2 - $s1 ))
                if [ "$diff" -gt "10" ];
                then
                    echo "$s2" "is a lot greater then " "$s1"
                    echo "It looks like rebuild has not finished yet. Waiting longer to continue"
                else
                    echo "" "$s1" " " "$s2"
                    echo "Looks like rebuilding finished. We can stop this"
                    ##curl --connect-timeout 3 -k -H "Content-Type: application/json" -X POST -d '{"secret":'"$SECRET"'}' http://"$SRV"/api/delegates/forging/enable ## Uncomment this line if you want this script to reenable forging when done
                    break
                fi
            done
        ##else ## Uncomment this line if you want this script to reenable forging when done
            ##curl --connect-timeout 3 -k -H "Content-Type: application/json" -X POST -d '{"secret":'"$SECRET"'}' http://"$SRV"/api/delegates/forging/enable ## Uncomment this line if you want this script to reenable forging when done
        fi
    fi
}

while true; do
    ## Check that lisk is running first!!
    top_height
    local_height

    echo "Local: $CHECKSRV, Highest: $HEIGHT, Diff: $diff"
    sleep 10
done