difficulty.sh

#!/bin/bash
BLOCKCHAININFO=$(bitcoin-cli getblockchaininfo)
CURRENTHEIGHT=$(echo $BLOCKCHAININFO | jq -r .blocks)
CURRENTTIME=$(echo $BLOCKCHAININFO | jq -r .mediantime)
BLOCKS=$((CURRENTHEIGHT%2016))
STARTHEIGHT=$((CURRENTHEIGHT-BLOCKS))
STARTBLOCK=$(bitcoin-cli getblock $(bitcoin-cli getblockhash $STARTHEIGHT))
STARTTIME=$(echo $STARTBLOCK | jq -r .mediantime)
AVERAGETIME=$(((CURRENTTIME-STARTTIME)/BLOCKS))
PERCENT=$(awk "BEGIN {print -100+(60000/$AVERAGETIME)}")
REMAININGBLOCKS=$((2016-BLOCKS))
ENDTIME=$((CURRENTTIME+(AVERAGETIME*REMAININGBLOCKS)))
DATE=$(date -d @$ENDTIME +'%Y-%m-%d %H:%M')
echo Difficulty adjustment: $PERCENT% on $DATE