Differential D7945 Diff 24699 contrib/devtools/utxo_snapshot.sh

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contrib/devtools/utxo_snapshot.sh

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				#!/usr/bin/env bash
				#
				# Copyright (c) 2019 The Bitcoin Core developers
				# Distributed under the MIT software license, see the accompanying
				# file COPYING or http://www.opensource.org/licenses/mit-license.php.
				#
				export LC_ALL=C

				set -ueo pipefail

				if (( $# < 3 )); then
				echo 'Usage: utxo_snapshot.sh <generate-at-height> <snapshot-out-path> <bitcoin-cli-call ...>'
				echo
				echo " if <snapshot-out-path> is '-', don't produce a snapshot file but instead print the "
				echo " expected assumeutxo hash"
				echo
				echo 'Examples:'
				echo
				echo " ./contrib/devtools/utxo_snapshot.sh 570000 utxo.dat ./src/bitcoin-cli -datadir=\$(pwd)/testdata"
				echo ' ./contrib/devtools/utxo_snapshot.sh 570000 - ./src/bitcoin-cli'
				exit 1
				fi

				GENERATE_AT_HEIGHT="${1}"; shift;
				OUTPUT_PATH="${1}"; shift;
				# Most of the calls we make take a while to run, so pad with a lengthy timeout.
				BITCOIN_CLI_CALL="${*} -rpcclienttimeout=9999999"

				# Block we'll invalidate/reconsider to rewind/fast-forward the chain.
				PIVOT_BLOCKHASH=$($BITCOIN_CLI_CALL getblockhash $(( GENERATE_AT_HEIGHT + 1 )) )

				(>&2 echo "Rewinding chain back to height ${GENERATE_AT_HEIGHT} (by invalidating ${PIVOT_BLOCKHASH}); this may take a while")
				${BITCOIN_CLI_CALL} invalidateblock "${PIVOT_BLOCKHASH}"

				if [[ "${OUTPUT_PATH}" = "-" ]]; then
				(>&2 echo "Generating txoutset info...")
				${BITCOIN_CLI_CALL} gettxoutsetinfo \| grep hash_serialized_2 \| sed 's/^.*: "$.\+$\+",/\1/g'
				else
				(>&2 echo "Generating UTXO snapshot...")
				${BITCOIN_CLI_CALL} dumptxoutset "${OUTPUT_PATH}"
				fi

				(>&2 echo "Restoring chain to original height; this may take a while")
				${BITCOIN_CLI_CALL} reconsiderblock "${PIVOT_BLOCKHASH}"