#!/bin/bash
zcash-cli listunspent | jq '.[] | [.address, .amount] | @csv' | while read line; \
    do TADDR=$(grep -oP "[a-zA-Z0-9]{35}" <<< $line); \
       AMOUNT=$(grep -oP "[0-9]+\.?[0-9]+" <<< $line); \
       AMT="$(echo "$AMOUNT - 0.0001" | bc)"; \
       zcash-cli z_sendmany "$TADDR" "[{\"address\": \"$ZADDR\", \"amount\": $AMT}]"; done