# on receiving block 968210 here
$ date -u '+%Y-%m-%dT%H:%M:%SZ'
2026-09-23T01:36:43Z
# as written in the block header
2026-09-23T01:36:12Z

$ uptime   # since last reboot
 01:36:43 up 34 days, 15:52,  0 users,  load average: 0.99, 1.10, 1.24

$ battery.sh
102%, Power Supply Online

$ uname -smnr
Linux singer 6.18.44-0-lts x86_64

$ grep ^MemAvailable /proc/meminfo
MemAvailable:    1227556 kB

$ du -h -d1 .bitcoin/
12.6G	.bitcoin/indexes
5.1G	.bitcoin/signet
88.0M	.bitcoin/wallets
97.7G	.bitcoin/blocks
18.6M	.bitcoin/regtest
10.6G	.bitcoin/chainstate
126.3G	.bitcoin/

$ df -h .
Filesystem                Size      Used Available Use% Mounted on
/dev/sda3               911.4G    437.5G    473.0G  48% /

$ bitcoind -version
Bitcoin Core daemon version v31.99.0-gdb73d162395789ca3a74d50a831f4ac30c0da4f4 bitcoind
Copyright (C) 2009-2026 The Bitcoin Core developers

Please contribute if you find Bitcoin Core useful. Visit
<https://bitcoincore.org/> for further information about the software.
The source code is available from <https://github.com/bitcoin/bitcoin>.

This is experimental software.
Distributed under the MIT software license, see the accompanying file COPYING
or <https://opensource.org/license/MIT>

$ BC=$(bitcoin-cli getblockcount); echo $BC
968210

$ BH=$(bitcoin-cli getblockhash 968210); echo $BH
000000000000000000020156af5623a3cfaa426e489d1f1a8f98c81a634d80db

$ bitcoin-cli getblockheader 000000000000000000020156af5623a3cfaa426e489d1f1a8f98c81a634d80db
{
  "hash": "000000000000000000020156af5623a3cfaa426e489d1f1a8f98c81a634d80db",
  "confirmations": 1,
  "height": 968210,
  "version": 700186624,
  "versionHex": "29bc0000",
  "merkleroot": "57dc7619cf3c79b10d2a9e088860233a2a3250da377384af9cb26cc9b616522c",
  "time": 1790127372,
  "mediantime": 1790125436,
  "nonce": 731862338,
  "bits": "17021ec5",
  "target": "000000000000000000021ec50000000000000000000000000000000000000000",
  "difficulty": 132757073449487.5,
  "chainwork": "0000000000000000000000000000000000000001499df7bbd3eff7da1034e792",
  "nTx": 7071,
  "previousblockhash": "00000000000000000001301240b76da5853947baa0c48330163afe090aaea5f4"
}


$ echo $BH | tr 0 . | fold -w 4 | paste -d " " - - - -
.... .... .... ....
...2 .156 af56 23a3
cfaa 426e 489d 1f1a
8f98 c81a 634d 8.db

$ : Following was the shortform
$ : from which shortkode came
$ last=${BH: -4}
$ a=$(echo $BH | cut -b-60 \
  | fold -w 4 \
  | grep -Ev '^(0000|[^0]{4})$')
$ R=$(echo $a $last | cut -b-20)
$ printf "%s sf: " $BC
$ { echo $R | grep "$last$" \
  || echo $R M; } | tr "0\n" ". "
  echo
968210 sf: ...2 .156 8.db 

$ : Following was the shortkode
$ : from which anecdote came
$ nz=$(echo $BH | fold -w 4 \
  | grep -cE '^[^0]{4}$')
$ z=$(echo $BH | fold -w 4 \
  | grep -c '^0000$')
$ nzzs=$(((${nz}<<4)+${z}))
$ printf "%s sk: " $BC
$ printf "%s %x\n" \
    $last \
    $nzzs \
    | tr 0 .
968210 sk: 8.db 94

$ : Following is an anecdote
$ all=$(echo $BH | fold -w 4 \
    | sed 's/^/0x/' \
    | paste -s | tr '\t' ^)
$ printf "%s ak: " $BC
$ printf "%04x %02x\n" \
    $(($all)) $nzzs \
    | tr 0 .
968210 ak: f3f6 94

$ : Following is the jointkode
968210 jk: 80db f3f6 94

### niceblack moved to the end

$ bitcoin-cli getmempoolinfo
{
  "loaded": true,
  "size": 73510,
  "bytes": 39786458,
  "usage": 221723696,
  "total_fee": 0.06068606,
  "maxmempool": 300000000,
  "mempoolminfee": 0.00000100,
  "minrelaytxfee": 0.00000100,
  "incrementalrelayfee": 0.00000100,
  "unbroadcastcount": 0,
  "permitbaremultisig": true,
  "maxdatacarriersize": 100000,
  "limitclustercount": 64,
  "limitclustersize": 101000,
  "optimal": true
}

$ gmm.sh
152

## Current epoch estimation is +0.01%
## 530 of 2016, i.e. 26%, 1486 to go
## Current and previous two in numbers:
$ bitcoin-cli getnetworkhashps 2016
9.501921640898394e+20
$ bitcoin-cli getnetworkhashps 2016 967679
9.500046813447429e+20
$ bitcoin-cli getnetworkhashps 2016 965663
9.102936500339878e+20

$ bitcoin-cli gettxoutsetinfo muhash
{
  "height": 968210,
  "bestblock": "000000000000000000020156af5623a3cfaa426e489d1f1a8f98c81a634d80db",
  "txouts": 165205253,
  "bogosize": 12941392231,
  "muhash": "e9810a582df1281ffe73443002b5655e2f4b8562d2a8dfa29199f1310a704534",
  "total_amount": 20087929.25380694,
  "total_unspendable_amount": 230.12119306,
  "block_info": {
    "prevout_spent": 687.60937373,
    "coinbase": 3.12846766,
    "new_outputs_ex_coinbase": 687.60590607,
    "unspendable": 0.00000000,
    "unspendables": {
      "genesis_block": 0.00000000,
      "bip30": 0.00000000,
      "scripts": 0.00000000,
      "unclaimed_rewards": 0.00000000
    }
  }
}

$ bitcoin-cli getblockstats 968210
{
  "avgfee": 49,
  "avgfeerate": 0,
  "avgtxsize": 227,
  "blockhash": "000000000000000000020156af5623a3cfaa426e489d1f1a8f98c81a634d80db",
  "feerate_percentiles": [
    0,
    0,
    0,
    0,
    0
  ],
  "height": 968210,
  "ins": 7332,
  "maxfee": 6718,
  "maxfeerate": 15,
  "maxtxsize": 58936,
  "medianfee": 44,
  "mediantime": 1790125436,
  "mediantxsize": 221,
  "minfee": 34,
  "minfeerate": 0,
  "mintxsize": 150,
  "outs": 13855,
  "subsidy": 312500000,
  "swtotal_size": 1606925,
  "swtotal_weight": 3989297,
  "swtxs": 7068,
  "time": 1790127372,
  "total_out": 68760590607,
  "total_size": 1607485,
  "total_weight": 3991537,
  "totalfee": 346766,
  "txs": 7071,
  "utxo_increase": 6523,
  "utxo_size_inc": 450510,
  "utxo_increase_actual": -204,
  "utxo_size_inc_actual": -20512
}

$ bitcoin-cli getnettotals
{
  "totalbytesrecv": 20617034841,
  "totalbytessent": 48951784572,
  "timemillis": 1790127404044,
  "uploadtarget": {
    "timeframe": 86400,
    "target": 0,
    "target_reached": false,
    "serve_historical_blocks": true,
    "bytes_left_in_cycle": 0,
    "time_left_in_cycle": 0
  }
}

$ bitcoin-cli -netinfo
Bitcoin Core client v31.99.0-gdb73d162395789ca3a74d50a831f4ac30c0da4f4 - server 70017/Satoshi:31.99.0/

         ipv4     npr   total   block
in         29       1      30
out        10       0      10       2
total      39       1      40

Local services: witness, compact filters, network limited, p2p v2

Local addresses: n/a


$ bitcoin-cli -addrinfo
{
  "addresses_known": {
    "ipv4": 78664,
    "ipv6": 305,
    "onion": 1804,
    "i2p": 6,
    "cjdns": 0,
    "total": 80779
  }
}

$ halving.sh 968210
=====================================
  Bitcoin Block Halving prediction
=====================================

bc=968210
gbt=1231006505
bbt=1790127372

This is average time to mine a block
(1790127372-1231006505)/968210
bts=577.4783254889688301413638

Now let's multiply that by 1050000
which is the block number of next
halving and get the prediction:
Wed Mar 22 17:35:24 UTC 2028

-------------------------------------
Next palindrome will be 968869
predicted to happen at this time:
Sun Sep 27 11:18:50 UTC 2026

-------------------------------------
Current mining epoch number is 480.
The next fortnight happens in block
969696 and probably around this time:
Fri Oct  2 23:58:24 UTC 2026

### v2_peerinfo are in v2_peerinfo-bitcoin.txt
$ bitcoin-cli getpeerinfo | grep -w 'v2' | uniq -c
     13     "transport_protocol_type": "v2",

$ bitcoin-cli getpeerinfo \
    | jq -r '.[]
      | select ( .transport_protocol_type == "v2" )
      | .addr + " " + .session_id' \
    | while read addr sid
      do
        a=$(echo ${addr%\]*} | tr -d '\[' | md5sum | cut -b-16);
        printf "%s\n\t%s\n" "$a" "$sid"
      done

e0a1adad8382d9e0
	c3e1be3d4b5b1bc9891aa2017a184015a454bd1b5c2947e93ff5c1ff5fdf490e
646ebacd2d74e318
	488cad6d1e128d49f2f49128fca82047c09fade0e0cbc9a0978d2e26484ccd8e
bf320b8f136696ac
	fd9c2f189f8c9a24fd38bade3a9ce4b7d50d11043691b7c1233349d8b9cc14b2
83f6ce849ae8fe0e
	a13314c2021f6186384c5bc020ebf1c1405d1f83be68263de3f0437f2c0a8bbf
18a3696c699a75af
	d67fe964c9abe8e51e92efcca88532609d00ad86090012b5301a31e81b05d68d
1eeba50e60490dce
	0c9d10718b303f95254e01c5c1b560b76683ee408d3cd4f78b583d7dd35eee19
cf46cb2f34f5c7ef
	1bba8050e8901663abf3bdbb645293b5aa9427ebb44c0315ce75f3af6b010db4
041eaafa9d1f977e
	7be73fdea54f44a3948c6866641b2be645b49dab49ea0fba0387893294a9ebdb
0c7103abb04eedd6
	7cd8ddf8f18963e1301cb7fb4eb05868d770a20db3382212e3bfe0b9168493bd
0db41a458cc20534
	24c48e4d4f28e736335f642ab9ed22fc7d6484ba35a780f33ee258e615bb7a59
59bb2d6dfa2aeb3a
	b45fd428c7e67206f0a9ad9d3ea3488010d39a674077c340fa9d7a65097a18be
b40b0b99dfda280c
	1a07eba96b5ee25f036e3e2c23a918f83c353d432a9331c61705557fc044983c
8f753099e679e851
	9e892d73969ea0cc95251569480c4ae787542d31e782aa719ea2589ad8d07937


$ niceblack.sh $BH $BC
   ___   __    ___    ____  _  ___  
  / _ \ / /_  ( _ )  |___ \/ |/ _ \ 
 | (_) | '_ \ / _ \    __) | | | | |
  \__, | (_) | (_) |  / __/| | |_| |
    /_/ \___/ \___/  |_____|_|\___/ 

  ,----- .123 4567 89ab cdef -----,
  |                               |
  | ..   .... .... .... ....   .f |
  | 1.   ...2 .156 af56 23a3   1f |
  | 2.   cfaa 426e 489d 1f1a   2f |
  | 3.   8f98 c81a 634d 8.db   3f |
  '===   ==== ==== ==== ====   ==='
   jk:   8.db f3f6 94