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#! /bin/sh
# Query bitcoind to get (first) unspent output to spend.
###
# Nobody should *EVER* write code like this. EVER!!
###
set -e
if [ n"$1" = n--privkey ]; then
KEY=1
shift
fi
NUM=1
if [ $# = 1 ]; then
NUM=$1
shift
fi
if [ $# -gt 0 ]; then
echo "Usage: getinput.sh [--privkey] [INPUT-INDEX]"
exit 1
fi
if [ -n "$KEY" ]; then
ADDR=`bitcoin-cli -regtest listunspent | sed -n 's/^ "address" : "\([0-9a-zA-Z]*\)",$/\1/p' | tail -n +$NUM | head -n1`
bitcoin-cli dumpprivkey $ADDR
else
TXID=`bitcoin-cli -regtest listunspent | sed -n 's/^ "txid" : "\([0-9a-f]*\)",$/\1/p' | tail -n +$NUM | head -n1`
OUTNUM=`bitcoin-cli -regtest listunspent | sed -n 's/^ "vout" : \([0-9]*\),$/\1/p' | tail -n +$NUM | head -n1`
AMOUNT=`bitcoin-cli -regtest listunspent | sed -n 's/^ "amount" : \([0-9.]*\),$/\1/p' | tail -n +$NUM | head -n1 | tr -d . | sed 's/^0*//'`
SCRIPT=`bitcoin-cli -regtest listunspent | sed -n 's/^ "scriptPubKey" : "\([0-9a-f]*\)",$/\1/p' | tail -n +$NUM | head -n1`
echo $TXID/$OUTNUM/$AMOUNT/$SCRIPT
fi