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45 lines
1.6 KiB
45 lines
1.6 KiB
6 years ago
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#!/usr/bin/env bash
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#
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# Copyright (c) 2019 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#
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export LC_ALL=C
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set -ueo pipefail
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if (( $# < 3 )); then
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echo 'Usage: utxo_snapshot.sh <generate-at-height> <snapshot-out-path> <bitcoin-cli-call ...>'
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echo
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echo " if <snapshot-out-path> is '-', don't produce a snapshot file but instead print the "
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echo " expected assumeutxo hash"
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echo
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echo 'Examples:'
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echo
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echo " ./contrib/devtools/utxo_snapshot.sh 570000 utxo.dat ./src/bitcoin-cli -datadir=\$(pwd)/testdata"
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echo ' ./contrib/devtools/utxo_snapshot.sh 570000 - ./src/bitcoin-cli'
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exit 1
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fi
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GENERATE_AT_HEIGHT="${1}"; shift;
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OUTPUT_PATH="${1}"; shift;
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# Most of the calls we make take a while to run, so pad with a lengthy timeout.
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BITCOIN_CLI_CALL="${*} -rpcclienttimeout=9999999"
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# Block we'll invalidate/reconsider to rewind/fast-forward the chain.
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PIVOT_BLOCKHASH=$($BITCOIN_CLI_CALL getblockhash $(( GENERATE_AT_HEIGHT + 1 )) )
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(>&2 echo "Rewinding chain back to height ${GENERATE_AT_HEIGHT} (by invalidating ${PIVOT_BLOCKHASH}); this may take a while")
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${BITCOIN_CLI_CALL} invalidateblock "${PIVOT_BLOCKHASH}"
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if [[ "${OUTPUT_PATH}" = "-" ]]; then
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(>&2 echo "Generating txoutset info...")
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${BITCOIN_CLI_CALL} gettxoutsetinfo | grep hash_serialized_2 | sed 's/^.*: "\(.\+\)\+",/\1/g'
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else
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(>&2 echo "Generating UTXO snapshot...")
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${BITCOIN_CLI_CALL} dumptxoutset "${OUTPUT_PATH}"
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fi
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(>&2 echo "Restoring chain to original height; this may take a while")
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${BITCOIN_CLI_CALL} reconsiderblock "${PIVOT_BLOCKHASH}"
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