Print a taproot signalling block diagram

taproot.sh

#!/bin/bash
BLOCKCHAININFO=$(bitcoin-cli getblockchaininfo)
BLOCKS=$(echo "$BLOCKCHAININFO" | jq .blocks)
TAPROOT=$(echo "$BLOCKCHAININFO" | jq .softforks.taproot.bip9)
SINCE=$(echo "$TAPROOT" | jq .since)
PERIOD=$(echo "$TAPROOT" | jq .statistics.period)
BLOCKS=$(echo "$BLOCKCHAININFO" | jq .blocks)
PERIOD_COUNT=$(((BLOCKS - SINCE) / PERIOD))
SINCE=$((SINCE + (PERIOD * PERIOD_COUNT)))
ELAPSED=$(echo "$TAPROOT" | jq .statistics.elapsed)
for BLOCK in $(seq "$SINCE" $((SINCE + ELAPSED - 1))); do
  HASH=$(bitcoin-cli getblockhash "$BLOCK")
  HEADER=$(bitcoin-cli getblockheader "$HASH")
  VERSION=$(echo "$HEADER" | jq .version)
  SIGNAL=$(((VERSION & 3758096388) == 536870916))
  case $SIGNAL in
    (1) echo -n "🟩";;
    (0) echo -n "🟥";;
  esac
  if ((($BLOCK + 1) % 48 == 0)); then echo; fi
done
echo

PERCENTAGE=`echo $BLOCKCHAININFO | jq '.softforks.taproot.bip9.statistics | .count / .elapsed * 100'`
echo $PERCENTAGE

Nice going! I ran the script through https://www.shellcheck.net/ - it's a linter that finds potentially problematic code.
It didn't find anything aweful, just:

• Use $(...) notation instead of legacy backticked .... - https://github.com/koalaman/shellcheck/wiki/SC2006
• Double quote to prevent globbing and word splitting. - https://github.com/koalaman/shellcheck/wiki/SC2086

Here's the linted version:

#!/bin/bash
BLOCKCHAININFO=$(bitcoin-cli getblockchaininfo)
TAPROOT=$(echo "$BLOCKCHAININFO" | jq .softforks.taproot.bip9)
SINCE=$(echo "$TAPROOT" | jq .since)
ELAPSED=$(echo "$TAPROOT" | jq .statistics.elapsed)
for BLOCK in $(seq "$SINCE" $((SINCE + ELAPSED - 1))); do
  HASH=$(bitcoin-cli getblockhash "$BLOCK")
  HEADER=$(bitcoin-cli getblockheader "$HASH")
  VERSION=$(echo "$HEADER" | jq .version)
  SIGNAL=$(((VERSION & 3758096388) == 536870916))
  case $SIGNAL in
    (1) echo -n "🟩";;
    (0) echo -n "🟥";;
  esac
done

$SINCE refers to the first period, so you need something slightly more complicated to deal with subsequent periods.

bitcoin/bitcoin#22016 to the rescue:

#!/bin/bash
BLOCKCHAININFO=$(bitcoin-cli getblockchaininfo)
TAPROOT=$(echo "$BLOCKCHAININFO" | jq .softforks.taproot.bip9)
PERIOD_START=$(echo "$TAPROOT" | jq .statistics.period_start)
ELAPSED=$(echo "$TAPROOT" | jq .statistics.elapsed)
for BLOCK in $(seq "$PERIOD_START" $((PERIOD_START + ELAPSED - 1))); do
  HASH=$(bitcoin-cli getblockhash "$BLOCK")
  HEADER=$(bitcoin-cli getblockheader "$HASH")
  VERSION=$(echo "$HEADER" | jq .version)
  SIGNAL=$(((VERSION & 3758096388) == 536870916))
  case $SIGNAL in
    (1) echo -n "🟩";;
    (0) echo -n "🟥";;
  esac
done

The version at the top was updated with the slightly more complicated stuff. But having that field in the API is really nice, it surprised my a bit after the first difficulty period.

Also for testnet you need something like seq -f "%.10g" to prevent it from messing up the block numbers.

This version uses the new (proposed) period_start fields and adds testnet support (./taproot.sh -testnet)

#!/bin/bash
NETWORK=$1
BLOCKCHAININFO=$(bitcoin-cli $NETWORK getblockchaininfo)
BLOCKS=$(echo "$BLOCKCHAININFO" | jq .blocks)
TAPROOT=$(echo "$BLOCKCHAININFO" | jq .softforks.taproot.bip9)
PERIOD=$(echo "$TAPROOT" | jq .statistics.period)
PERIOD_START=$(echo "$TAPROOT" | jq .statistics.period_start)
BLOCKS=$(echo "$BLOCKCHAININFO" | jq .blocks)
ELAPSED=$(echo "$TAPROOT" | jq .statistics.elapsed)
for BLOCK in $(seq -f "%.10g" "$PERIOD_START" $((PERIOD_START + ELAPSED - 1))); do
  HASH=$(bitcoin-cli $NETWORK getblockhash "$BLOCK")
  HEADER=$(bitcoin-cli $NETWORK getblockheader "$HASH")
  VERSION=$(echo "$HEADER" | jq .version)
  SIGNAL=$(((VERSION & 3758096388) == 536870916))
  case $SIGNAL in
    (1) echo -n "🟩";;
    (0) echo -n "🟥";;
  esac
  if ((($BLOCK + 1) % 48 == 0)); then echo; fi
done
echo

PERCENTAGE=`echo $BLOCKCHAININFO | jq '.softforks.taproot.bip9.statistics | .count / .elapsed * 100'`
echo $PERCENTAGE

Testnet isn't going too well this period:

Infinite version

#!/bin/bash
BLOCKCHAININFO=$(bitcoin-cli getblockchaininfo)
BLOCKS=$(echo "$BLOCKCHAININFO" | jq .blocks)
TAPROOT=$(echo "$BLOCKCHAININFO" | jq .softforks.taproot.bip9)
SINCE=$(echo "$TAPROOT" | jq .since)
PERIOD=$(echo "$TAPROOT" | jq .statistics.period)
BLOCKS=$(echo "$BLOCKCHAININFO" | jq .blocks)
PERIOD_COUNT=$(((BLOCKS - SINCE) / PERIOD))
START=$((SINCE + (PERIOD * PERIOD_COUNT)))
ELAPSED=$(echo "$TAPROOT" | jq .statistics.elapsed)
COUNT=0
for BLOCK in $(seq "$SINCE" $((START + ELAPSED - 1))); do
  HASH=$(bitcoin-cli getblockhash "$BLOCK")
  HEADER=$(bitcoin-cli getblockheader "$HASH")
  VERSION=$(echo "$HEADER" | jq .version)
  SIGNAL=$(((VERSION & 3758096388) == 536870916))
  case $SIGNAL in
    (1) echo -n "🟧"
        ((COUNT++))
    ;;
    (0) echo -n "🟦"
    ;;
  esac
  if (( ($BLOCK + 1) % 56 == 0 )); then echo "   "; COUNT=0; fi
done
echo " $COUNT"