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|
#!/bin/bash
usage(){
echo "enter - Crawl an arching kaos chain"
echo "-----------------------------------"
echo "Usage:"
echo " --help, -h Print this help and exit"
echo " --chain <ipns-link>, -n <ipns-link> Crawl specified chain"
echo " --show-zblocks-only, -z Show only zblocks"
echo " --no-verify, -nV Don't verify signatures"
echo " <ipfs-link> Specify IPFS CID for entrance"
echo ""
echo "Note that combined flags don't work for now"
echo "Running with no flags crawls your chain"
}
# Start of tests
#entrance="QmW5WVXCJfhb4peHG6cbEdamC24vZzMX2Vz386vpENh38U"
#entrance="QmNjQq7GkuXGF8kFT1z2Mv3i4JhY7sBXVUmHDiR1zkQjoE"
#entrance="QmbFMke1KXqnYyBBWxB74N4c5SBnJMVAiMNRcGu6x1AwQH"
# End of tests
verify=1
if [ ! -z "$1" ] && [ "$1" == "-h" ] || [ "$1" == "--help" ]
then
usage
exit
elif [ ! -z "$1" ] && [ "$1" == "-nV" ] || [ "$1" == "--no-verify" ]
then
verify=0
entrance="$(cat $ZLATEST)"
elif [ ! -z "$1" ] && [ "$1" == "-n" ]
then
entrance="$(ipns-resolve $2)"
elif [ ! -z "$1" ] && [ "$1" == "--show-zblocks-only" ] || [ "$1" == "-z" ]
then
# Enter temp folder
TEMPASSIN="/tmp/aktmp_$(date -u +%s)"
mkdir $TEMPASSIN
cd $TEMPASSIN
ccounter=0
entrance="$(cat $ZLATEST)"
seed="$(cat $ZGENESIS)"
echo '['
zblock=$entrance
while true
do
if [ "$counter" == 0 ]
then
echo "["
fi
counter=$(expr $counter + 1)
if [ ! -v $zblock ]
then
if [ "$zblock" != "$seed" ]
then
timestamp=''
echo '{"zblock":"'$zblock'",'
ipfs cat $zblock | json2bash > $TEMPASSIN/tmp-zblock
source $TEMPASSIN/tmp-zblock
ipfs cat $block | json2bash > $TEMPASSIN/tmp-block
source $TEMPASSIN/tmp-block
logthis "[INFO]" "BLOCK REFERENCED"
if [ ! -v $timestamp ]
then
echo '"timestamp":"'$timestamp'",'
fi
echo '"block_signature":"'$block_signature'",'
echo '"gpg":"'$gpg'",'
if [ -v $previous ]
then
logthis "[ERROR]" "Block $block has no previous zblock $previous. Appending default genesis to close cleanly."
echo '"previous":"genesis"},{"genesis":"genesis"}]'
exit 0
else
echo '"previous":"'$previous'"},'
zblock=$previous
fi
elif [ "$zblock" == "$seed" ]
then
echo '{"genesis":"genesis"}]'
logthis "[INFO]" "Counter $counter"
exit 0
fi
else
echo "Check not passed... No previous IPFS CID"
exit 1
fi
done
elif [ ! -z "$1" ]
then
entrance="$1"
else
# By default we enter from the latest block
# We can alter this by changing this value
entrance="$(cat $ZLATEST)"
fi
# We assign the IPFS CIDv0 of an empty file as this is used
# as our GENESIS block, hence the "seed" that the tree grows
# from.
seed="$(cat $ZGENESIS)"
# We assume that we found the entrance inside a block, hence
# ZBLOCK is labeled as previous
zblock="$entrance"
# Enter temp folder
TEMPASSIN="/tmp/aktmp_$(date -u +%s)"
mkdir $TEMPASSIN
cd $TEMPASSIN
counter=0
# The loop
# We break the loop from inside the loop
while true
do
if [ $counter == 0 ]
then
echo '['
fi
counter=$(expr $counter + 1)
# Check if $zblock exists as variable
if [ ! -v $zblock ]
then
# Check if it is not our seed cause if it is we skip this part
if [ "$zblock" != "$seed" ]
then
# Reset timestamp since it's introduced later
timestamp=''
# Announce to stdout which ZBLOCK is being read at the moment
logthis "[INFO]" "Examining $zblock"
echo '{"zblock":"'$zblock'",'
# We create files named after each ZBLOCK IPFS CID for later
# reference. Files are empty.
touch $ZBLOCKDIR/$zblock
logthis "[INFO]" "Created reference"
# We concatenate the zblock's contents, pipe them through filter
# json2bash and output them to tmp-file
ipfs cat $zblock | json2bash > $TEMPASSIN/tmp-zblock
logthis "[INFO]" "ZBLOCK $zblock READ"
# Supposingly you are on a safe environment and you only have
# access to your chain, I would consider mild secure to source
# the files into your bash.
# File an issue/pull request if you think it can be done better!!
source $TEMPASSIN/tmp-zblock
logthis "[INFO]" "ZBLOCK SOURCED"
# Same as above applies to BLOCK and DATA subparts of each ZBLOCK
# BLOCKS
echo '"block":"'$block'",'
ipfs cat $block | json2bash > $TEMPASSIN/tmp-block
source $TEMPASSIN/tmp-block
logthis "[INFO]" "BLOCK $block SOURCED"
touch $BLOCKDIR/$block
logthis "[INFO]" "BLOCK REFERENCED"
module="$(echo $action | sed -e 's/\// /g' | awk '{ print $1 }')"
logthis "[INFO]" "DATA is $module module."
command="$(echo $action | sed -e 's/\// /g' | awk '{ print $2 }')"
logthis "[INFO]" "COMMAND is $command"
if [ ! -v $timestamp ]
then
echo '"timestamp":"'$timestamp'",'
fi
echo '"block_signature":"'$block_signature'",'
echo '"detach":"'$detach'",'
echo '"module":"'$module'",'
echo '"action":"'$command'",'
echo '"gpg":"'$gpg'",'
if [ $verify == 1 ]
then
ipfs get $gpg > /dev/null 2>&1
if [ "$?" == 0 ]
then
gpg2 --import $gpg > /dev/null 2>&1
if [ "$?" == 0 ]
then
logthis "[INFO]" "$gpg imported."
else
logthis "[ERROR]" "Could not import GPG key: $gpg ."
exit 1
fi
else
logthis "[ERROR]" "Could not get GPG key: $gpg ."
exit 1
fi
ipfs get $block_signature > /dev/null 2>&1
if [ "$?" == 0 ]
then
mv $block_signature $block.asc
logthis "[GPG]" "Block signature downloaded"
else
logthis "[ERROR]" "Error while getting $block_signature for $block"
exit 1
fi
ipfs get $block > /dev/null 2>&1
if [ "$?" == 0 ]
then
logthis "[INFO]" "Downloaded block $block."
else
logthis "[ERROR]" "Could not get $block block"
exit 1
fi
gpg2 --verify $block.asc > /dev/null 2>&1
if [ "$?" == 0 ]
then
logthis "[GPG]" "$gpg signature of $block is verified."
else
logthis "[ERROR]" "Could not verify $block with GPG key $gpg."
exit 1
fi
fi
profile show $data
# DATA (but we don't source it's stuff)
# Only print to stdout
#ipfs cat $data
touch $DATADIR/$data
# Now, since we sourced the BLOCK to our terminal, we can search
# for $previous variable. In case we don't find one, we append one
# and we exit.
if [ -v $previous ]
then
logthis "[ERROR]" "Block $block has no previous zblock, appending pseudo genesis to exit gracefully."
echo '"previous":"genesis"},{"genesis":"genesis"}]'
exit 0
# Otherwise, we inform of the sequence
else
#echo "$zblock after $previous"
logthis "[INFO]" "Found a previous block: $previous"
echo '"previous":"'$previous'"},'
zblock=$previous
fi
# Now check if it is equal to the seed
# which apparently means we reached the seed.
elif [ "$zblock" == "$seed" ]
then
#echo "$zblock is GENESIS block"
#echo '"'$zblock'":{ "GENESIS":"GENESIS"}] '
echo '{"genesis":"genesis"}]'
logthis "[INFO]" "Reached $seed, counted $counter zblocks."
exit 0
fi
# And finally, if nothing is there exit with error
else
echo "Check not passed... No previous IPFS CID"
exit 1
fi
done
|
