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#! /bin/sh
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set -e
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if [ "$#" != 1 ]
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then
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echo Usage: "$0" "shortchannelid (e.g. 532046x1702x0 or 532046:1702:0)" >&2
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echo Uses bitcoin-cli to extract the actual txid >&2
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exit 1
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fi
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# Try to segment using both x and : as delimiters (compatibility with the old shortchannelid standard)
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BLOCK=$(echo "$1" | cut -dx -f1)
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TXNUM=$(echo "$1" | cut -dx -f2)
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if [ "$BLOCK" = "$1" ] && [ "$TXNUM" = "$1" ]
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then
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BLOCK=$(echo "$1" | cut -d: -f1)
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TXNUM=$(echo "$1" | cut -d: -f2)
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fi
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if [ "$BLOCK" = "$1" ] && [ "$TXNUM" = "$1" ]
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then
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echo The provided shortchannelid is invalid. Valid examples: 532046x1702x0 or 532046:1702:0 >&2
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exit 1
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fi
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bitcoin-cli getblock "$(bitcoin-cli getblockhash "$BLOCK")" true | grep '^ "' | head -n "$((TXNUM + 1))" | tail -n 1 | tr -dc '0-9a-f\n'
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