# on receiving block 966830 here
$ date -u '+%Y-%m-%dT%H:%M:%SZ'
2026-09-13T14:40:07Z
# as written in the block header
2026-09-13T14:39:46Z

$ uptime   # since last reboot
 14:40:07 up 25 days,  4:56,  0 users,  load average: 1.45, 1.09, 1.13

$ battery.sh
98%, Power Supply Online

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

$ grep ^MemAvailable /proc/meminfo
MemAvailable:    1377736 kB

$ du -h -d1 .bitcoin/
12.5G	.bitcoin/indexes
4.9G	.bitcoin/signet
88.0M	.bitcoin/wallets
97.8G	.bitcoin/blocks
18.6M	.bitcoin/regtest
10.7G	.bitcoin/chainstate
126.3G	.bitcoin/

$ df -h .
Filesystem                Size      Used Available Use% Mounted on
/dev/sda3               911.4G    435.2G    475.2G  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
966830

$ BH=$(bitcoin-cli getblockhash 966830); echo $BH
00000000000000000000f97fd3f76a88cea00423cba804a7665f2e089fd26f6f

$ bitcoin-cli getblockheader 00000000000000000000f97fd3f76a88cea00423cba804a7665f2e089fd26f6f
{
  "hash": "00000000000000000000f97fd3f76a88cea00423cba804a7665f2e089fd26f6f",
  "confirmations": 1,
  "height": 966830,
  "version": 944209920,
  "versionHex": "38478000",
  "merkleroot": "03bb6a5318e2c76923edff59f023daf11fa1cc49f7e8688c2026da163d9be941",
  "time": 1789310386,
  "mediantime": 1789304686,
  "nonce": 237416768,
  "bits": "1702355e",
  "target": "00000000000000000002355e0000000000000000000000000000000000000000",
  "difficulty": 127450789715843.1,
  "chainwork": "0000000000000000000000000000000000000001472316cc9d460917466568a2",
  "nTx": 3137,
  "previousblockhash": "00000000000000000000f76b897d817a5607cefec90e0eb6546cf3e03d35f008"
}


$ echo $BH | tr 0 . | fold -w 4 | paste -d " " - - - -
.... .... .... ....
.... f97f d3f7 6a88
cea. .423 cba8 .4a7
665f 2e.8 9fd2 6f6f

$ : 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
966830 sf: cea. .423 .4a7 2e.8 M 

$ : 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 .
966830 sk: 6f6f 75

$ : 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 .
966830 ak: fd66 75

$ : Following is the jointkode
966830 jk: 6f6f fd66 75

### niceblack moved to the end

$ bitcoin-cli getmempoolinfo
{
  "loaded": true,
  "size": 76233,
  "bytes": 39709831,
  "usage": 220356944,
  "total_fee": 0.06620276,
  "maxmempool": 300000000,
  "mempoolminfee": 0.00000100,
  "minrelaytxfee": 0.00000100,
  "incrementalrelayfee": 0.00000100,
  "unbroadcastcount": 40,
  "permitbaremultisig": true,
  "maxdatacarriersize": 100000,
  "limitclustercount": 64,
  "limitclustersize": 101000,
  "optimal": true
}

$ gmm.sh
166

## Current epoch estimation is +3.4%
## 1166 of 2016, i.e. 57%, 850 to go
## Current and previous two in numbers:
$ bitcoin-cli getnetworkhashps 2016
9.412465503381482e+20
$ bitcoin-cli getnetworkhashps 2016 965663
9.102936500339878e+20
$ bitcoin-cli getnetworkhashps 2016 963647
9.004776521724085e+20

$ bitcoin-cli gettxoutsetinfo muhash
{
  "height": 966830,
  "bestblock": "00000000000000000000f97fd3f76a88cea00423cba804a7665f2e089fd26f6f",
  "txouts": 165220723,
  "bogosize": 12943149065,
  "muhash": "b6a8daf7c65fe0fd16b4f6e76053bd2c94a58816e773fd9b228c7d135143415e",
  "total_amount": 20083616.75524650,
  "total_unspendable_amount": 230.11975350,
  "block_info": {
    "prevout_spent": 3099.30590256,
    "coinbase": 3.14664183,
    "new_outputs_ex_coinbase": 3099.28426072,
    "unspendable": 0.00000001,
    "unspendables": {
      "genesis_block": 0.00000000,
      "bip30": 0.00000000,
      "scripts": 0.00000001,
      "unclaimed_rewards": 0.00000000
    }
  }
}

$ bitcoin-cli getblockstats 966830
{
  "avgfee": 690,
  "avgfeerate": 2,
  "avgtxsize": 493,
  "blockhash": "00000000000000000000f97fd3f76a88cea00423cba804a7665f2e089fd26f6f",
  "feerate_percentiles": [
    0,
    1,
    1,
    2,
    3
  ],
  "height": 966830,
  "ins": 8242,
  "maxfee": 84983,
  "maxfeerate": 200,
  "maxtxsize": 59064,
  "medianfee": 282,
  "mediantime": 1789304686,
  "mediantxsize": 222,
  "minfee": 0,
  "minfeerate": 0,
  "mintxsize": 94,
  "outs": 7906,
  "subsidy": 312500000,
  "swtotal_size": 1316919,
  "swtotal_weight": 3067185,
  "swtxs": 2948,
  "time": 1789310386,
  "total_out": 309928426073,
  "total_size": 1548951,
  "total_weight": 3995313,
  "totalfee": 2164183,
  "txs": 3137,
  "utxo_increase": -336,
  "utxo_size_inc": -24124,
  "utxo_increase_actual": -1488,
  "utxo_size_inc_actual": -107929
}

$ bitcoin-cli getnettotals
{
  "totalbytesrecv": 13724301002,
  "totalbytessent": 34108822660,
  "timemillis": 1789310408208,
  "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         32       1      33
out        10       0      10       2
total      42       1      43

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

Local addresses: n/a


$ bitcoin-cli -addrinfo
{
  "addresses_known": {
    "ipv4": 78603,
    "ipv6": 308,
    "onion": 1828,
    "i2p": 6,
    "cjdns": 0,
    "total": 80745
  }
}

$ halving.sh 966830
=====================================
  Bitcoin Block Halving prediction
=====================================

bc=966830
gbt=1231006505
bbt=1789310386

This is average time to mine a block
(1789310386-1231006505)/966830
bts=577.4575711784169105045245

Now let's multiply that by 1050000
which is the block number of next
halving and get the prediction:
Wed Mar 22 11:32:12 UTC 2028

-------------------------------------
Next palindrome will be 967769
predicted to happen at this time:
Sat Sep 19 21:16:58 UTC 2026

-------------------------------------
Current mining epoch number is 479.
The next fortnight happens in block
967680 and probably around this time:
Sat Sep 19 07:00:24 UTC 2026

### v2_peerinfo are in v2_peerinfo-bitcoin.txt
$ bitcoin-cli getpeerinfo | grep -w 'v2' | uniq -c
     18     "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

2fe657504291436b
	9c501a1ae0a3cd9eb2cdb4b50afc06741bee4bb36447dd6f9b1169da4688abd4
4429b73fffa10bc5
	364061ab2428d09fce1bd54e59e729f8c3ad5a0476383798c0a2e9fc57d70024
55d45610947dac3f
	afb506f14fd6388afafba91f74a9368184b17f7e2f7436bbed315e4e21d2828a
a8155758465dfb26
	750aeb296d5f038ce225e25e8fa3fc4d91a0010193bb3a0f3e6bbe3ad9aa9f1f
5b67796efcc30c3a
	e6b95ac267eab33d7a0fd7febb91b7a01458c13f7cf638b6b9954defce847057
74fedb6e41df9591
	20f6614c2e2737c5f078748201c17b46918355c8220174eec1d223f498d91c26
1ffafc66ecb3c5d4
	1c41dbd7aa2543aa848006b12d3211278910821d15ac187e9f0884f3286b38bc
7daaee24c6571433
	7b59df9926b06d53843a56e7351977e60ed3318e2f8f20ba11f1f61a272ce52b
959e9f48da10fd18
	1c95ed7754a9147d604ff710440c609e42333d33a01a95e7f2d8cb4cdb86c729
eb19da94a24c672f
	04d663a504f5be1eabf3251193a49ed165fb42f50c0316eecbb95062c5ae5afc
65a1f151f40e920a
	01c826c049d7f48a69ef2372f8c8cef55330643b371ba7afdd77b79fa39cdde2
e95cc4a881eb9fa7
	dc940d77cdf8d87bb4965eb92d650b7a98712a89445416f4e4e32602a374b9e9
0a744fb5dedb41c6
	fcafc11860088900de5ed849c16577cce46601384857cb8ee45781086f93b5dc
646ebacd2d74e318
	4a22cb63bc5d7436503496f8c85ec21332239b0e13ebac11ea746e7eda05241b
73815b7371ea06de
	25fc10aea70ebcd9433bcc03a11909c61c626f4119ac929d704631c07afbd4c0
487edd5d5c4a2cd2
	41d90450b84a182141dd7f4f1ddf98a873a7353c0e79a62cab9a4a3edee327c4
5d35624dddace25f
	55658bcebd94854e72dc24867a80900ea79c55c663d416250230a993efb4f283
9322ad0a9f0da34a
	1194729d9474470e0171103e56399852b0b5f00601ca3353504bd19d5bddd3b2


$ niceblack.sh $BH $BC
         |    |          |   
          _ \ |  _ \  _| | / 
        _.__/_|\___/\__|_\_\ 

      _ \ /    /    _ )__ /   \  
    \_  / _ \  _ \  _ \ _ \ (  | 
      _/\___/\___/\___/___/\__/  

  ,----- .123 4567 89ab cdef -----,
  |                               |
  | ..   .... .... .... ....   .f |
  | 1.   .... f97f d3f7 6a88   1f |
  | 2.   cea. .423 cba8 .4a7   2f |
  | 3.   665f 2e.8 9fd2 6f6f   3f |
  '===   ==== ==== ==== ====   ==='
   jk:   6f6f fd66 75