Script to import recently used addresses from a legacy wallet into a new descriptor wallet

importrecent.sh

#!/bin/bash

shopt -s expand_aliases
alias btc-cli='bitcoin-cli -datadir=.bitcoin'

if [[ $# -lt 3 ]]; then echo "usage: $0 <rpcwallet-from> <rpcwallet-to> <maximum confirmations>" ; exit 1 ; fi

FROM=$1
TO=$2
CONFIRMATIONS=$3

# create new descriptor wallet 
#   disable_private_keys=false
#   blank=false, 
#   passphrase="foo"
#   avoid_reuse=false
#   descriptor=true
btc-cli createwallet $2 false false "foo"
btc-cli -rpcwallet=$1 walletpassphrase "foo" 1000000
btc-cli -rpcwallet=$2 walletpassphrase "foo" 1000000

# get maximum confirmations cutoff of 2000 most recently used addresses:
# btc-cli -rpcwallet=perf-legacy listreceivedbyaddress | jq -r '.[] | .confirmations' | sort -g | head -n 2000

echo "finding addresses in wallet '$1' that received payments less than $CONFIRMATIONS blocks ago" 
RECENT_ADDRS=$(btc-cli -rpcwallet=$1 listreceivedbyaddress | jq -r --arg C "$CONFIRMATIONS" '.[] | select(.confirmations <= ($C | tonumber))' | jq -r '.address') 
echo "$(echo $RECENT_ADDRS | wc -w) addresses exported from '$1' will be imported into '$2'"

echo "checking if any addresses are already solvable by wallet '$2'"
if [ -f $2_already_solvable.log ]; then rm $2_already_solvable.log; fi
for ADDR in $RECENT_ADDRS
do
    SOVLABLE=$(btc-cli -rpcwallet=$2 getaddressinfo $ADDR | jq -r '.solvable')
    if [ $SOVLABLE != "false" ]; then echo $ADDR >> $2_already_solvable.log; fi
done

echo "generating requests"
REQUESTS=()
for ADDR in $RECENT_ADDRS
do
    ADDR_INFO=$(btc-cli -rpcwallet=$1 getaddressinfo $ADDR)
    DESC=$(echo $ADDR_INFO | jq '.desc')
    TIMESTAMP=$(echo $ADDR_INFO | jq '.timestamp')
    PUBKEY=$(echo $ADDR_INFO | jq '.pubkey')
    KEY=$(btc-cli -rpcwallet=$1 dumpprivkey $ADDR)
    INTERNAL=$(echo $ADDR_INFO | jq '.ischange')
    LABEL=$(echo $ADDR_INFO | jq '.labels[0]')
    DESC_INFO=$(btc-cli -rpcwallet=$1 getdescriptorinfo wpkh\($KEY\))
    CHECKSUM=$(echo $DESC_INFO | jq -r '.checksum')
    REQUESTS+=("{\"desc\":\"wpkh($KEY)#$CHECKSUM\",\"timestamp\":$TIMESTAMP,\"internal\":$INTERNAL,\"label\":$LABEL}")
done

echo "importing descriptors in to wallet '$2'"
echo $(IFS=,;echo "[${REQUESTS[*]}]") | btc-cli -rpcwallet=$2 -stdin importdescriptors > /dev/null

echo "checking addresses are solvable in wallet '$2' after rescan"
if [ -f $2_not_solvable.log ]; then rm $2_not_solvable.log; fi
for ADDR in $RECENT_ADDRS
do
    SOVLABLE=$(btc-cli -rpcwallet=$2 getaddressinfo $ADDR | jq -r '.solvable')
    if [ $SOVLABLE != "true" ]; then echo $ADDR >> $2_not_solvable.log; fi
done
if [ -f $2_already_solvable.log ]; then echo "$(cat $2_already_solvable.log | wc -l) already solvable by wallet '$2', see: $2_already_solvable.log"; fi
if [ -f $2_not_solvable.log ]; then echo "$(cat $2_not_solvable.log | wc -l) not solvable by wallet '$2', see: $2_not_solvable.log"; fi