core-lightning/contrib/short_channel_id-to-txid.sh

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#! /bin/sh
set -e
if [ "$#" != 1 ]; then
echo Usage: "$0" "short:channel:id" >&2
echo Uses bitcoin-cli to extract the actual txid >&2
exit 1
fi
BLOCK=$(echo "$1" | cut -d: -f1)
TXNUM=$(echo "$1" | cut -d: -f2)
bitcoin-cli getblock "$(bitcoin-cli getblockhash "$BLOCK")" true | grep '^ "' | head -n "$((TXNUM + 1))" | tail -n 1 | tr -dc '0-9a-f\n'