Register a Dash blockchain user

blockchain_user_register.sh

CLI_PATH="$HOME/dashevo/dash/src"
CONF_FILE="$HOME/dashcore_evo/devnet-mydevnet.conf"
RUN_CLI="$CLI_PATH/dash-cli -conf=$CONF_FILE"

USERNAME="myuser0001"

printf "dash-cli in: $CLI_PATH\n"
printf "Dash conf file: $CONF_FILE\n\n"

# Returns the value contained in "$prop" of "$json"
# As found on https://gist.github.com/cjus/1047794
function jsonval {
    temp=`echo $json | sed 's/\\\\\//\//g' | sed 's/[{}]//g' | awk -v k="text" '{n=split($0,a,","); for (i=1; i<=n; i++) print a[i]}' | sed 's/\"\:\"/\|/g' | sed 's/[\,]/ /g' | sed 's/\"//g' | grep -w $prop| cut -d":" -f2| sed -e 's/^ *//g' -e 's/ *$//g'`
    echo ${temp##*|}
}

# Check for username
COMMAND="getuser $USERNAME"
BU_INFO="$($RUN_CLI $COMMAND)"

# Don't attempt to create user if already present
if [ -z "$BU_INFO" ];
then
	printf "Check for user '$USERNAME' returned no results\n\n"

	# Generate address to use for username
	COMMAND="getnewaddress"
	BU_ADDR="$($RUN_CLI $COMMAND)"
	printf "Address for BU (make a note of this for future reference):\n-----\n ${BU_ADDR}\n\n"

	# Creates raw SubTx AND signs it
	COMMAND="createsubtx register "$USERNAME" $BU_ADDR 0.01"
	BU_RAW_TX="$($RUN_CLI $COMMAND)"
	printf "Raw SubTxRegister (unsigned):\n-----\n ${BU_RAW_TX}\n\n"

	# Get the Hex field required by sendrawtransaction
	json=$BU_RAW_TX
	prop='hex'
	TX_HEX=`jsonval`
	printf "Signed Transaction (hex):\n$TX_HEX\n\n"

	# Send the SubTx
	COMMAND="sendrawtransaction $TX_HEX false false true"
	BU_TXID="$($RUN_CLI $COMMAND)"

	printf "SubTxRegister submitted!\nResponse:\n-----\n $BU_TXID\n\n"

	COMMAND="gettransaction $BU_TXID"
	BU_TX="$($RUN_CLI $COMMAND)"
	printf "BU Register Tx:\n-----\n $BU_TX\n\n"

	# Mine a block
	COMMAND="generate 1"
	GENERATE="$($RUN_CLI $COMMAND)"
	printf "Block generation:\n-----\n $GENERATE\n\n"
else
	printf "User '$USERNAME' already registered. User info found:\n-----\n $BU_INFO\n\n\nExiting...\n\n"
fi

unset CLI_PATH
unset CONF_FILE
unset RUN_CLI
unset USERNAME
unset COMMAND
unset BU_INFO
unset BU_ADDR
unset BU_RAW_TX
unset TX_HEX
unset BU_TXID
unset BU_TX
unset GENERATE
unset BU_TX