# on receiving block 920278 here
$ date -u '+%Y-%m-%dT%H:%M:%SZ'
2025-10-22T16:09:26Z
# as written in the block header
2025-10-22T16:09:02Z

$ uptime   # since last reboot
 16:09:26 up 70 days,  2:00,  0 users,  load average: 0.89, 1.96, 1.92

$ battery.sh
56%, Power Supply Online

$ uname -smnr
Linux singer 6.12.40-0-lts x86_64

$ grep ^MemAvailable /proc/meminfo
MemAvailable:    2238540 kB

$ du -h -d1 .bitcoin/
1.5G	.bitcoin/testnet4
11.7G	.bitcoin/indexes
3.5G	.bitcoin/signet
41.7M	.bitcoin/wallets
97.7G	.bitcoin/blocks
18.6M	.bitcoin/regtest
11.0G	.bitcoin/chainstate
125.5G	.bitcoin/

$ df -h .
Filesystem                Size      Used Available Use% Mounted on
/dev/sda3               911.4G    831.0G     79.5G  91% /

$ bitcoind -version
Bitcoin Core daemon version libre-relay-v30.0-1
Copyright (C) 2009-2025 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
920278

$ BH=$(bitcoin-cli getblockhash 920278); echo $BH
00000000000000000000743a4375444bedcfe2ebd211cc98199bf0ed468bb4ad

$ bitcoin-cli getblockheader 00000000000000000000743a4375444bedcfe2ebd211cc98199bf0ed468bb4ad
{
  "hash": "00000000000000000000743a4375444bedcfe2ebd211cc98199bf0ed468bb4ad",
  "confirmations": 1,
  "height": 920278,
  "version": 738050048,
  "versionHex": "2bfdc000",
  "merkleroot": "091bc1a9d22e6b01f57a4ec8324f7993773754095a4308991058b9d5e041e459",
  "time": 1761149342,
  "mediantime": 1761146044,
  "nonce": 1055612552,
  "bits": "1701eb21",
  "target": "00000000000000000001eb210000000000000000000000000000000000000000",
  "difficulty": 146716052770107.5,
  "chainwork": "0000000000000000000000000000000000000000edef68bc2cc2a5aa30fb74a9",
  "nTx": 890,
  "previousblockhash": "0000000000000000000052cc27f9841ee5f898e1c9aa7fda2b268735c1a6b041"
}


$ echo $BH | tr 0 . | fold -w 4 | paste -d " " - - - -
.... .... .... ....
.... 743a 4375 444b
edcf e2eb d211 cc98
199b f.ed 468b b4ad

$ : 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
920278 sf: f.ed b4ad 

$ : 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 .
920278 sk: b4ad a5

$ : 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 .
920278 ak: 79f9 a5

### niceblack moved to the end

$ bitcoin-cli getmempoolinfo
{
  "loaded": true,
  "size": 50028,
  "bytes": 26363507,
  "usage": 153668576,
  "total_fee": 0.03253297,
  "maxmempool": 300000000,
  "mempoolminfee": 0.00000001,
  "minrelaytxfee": 0.00000001,
  "incrementalrelayfee": 0.00000001,
  "unbroadcastcount": 0,
  "fullrbf": true,
  "permitbaremultisig": true,
  "maxdatacarriersize": 100000
}

$ gmm.sh
122

## Current epoch estimation is +5.57%
## 982 of 2016, i.e. 48%, 1034 to go
## Current and previous two in numbers:
$ bitcoin-cli getnetworkhashps 2016
1.108484616312174e+21
$ bitcoin-cli getnetworkhashps 2016 919295
1.049978271078539e+21
$ bitcoin-cli getnetworkhashps 2016 917279
1.079369922029227e+21

$ bitcoin-cli gettxoutsetinfo muhash
{
  "height": 920278,
  "bestblock": "00000000000000000000743a4375444bedcfe2ebd211cc98199bf0ed468bb4ad",
  "txouts": 166415780,
  "bogosize": 13033632909,
  "muhash": "19a0751c951ab32fe4b72996176d950d4e972fdee6624ce20f1dd0ae6aa00f4d",
  "total_amount": 19938141.78957286,
  "total_unspendable_amount": 230.08542714,
  "block_info": {
    "prevout_spent": 2403.89449724,
    "coinbase": 3.13136884,
    "new_outputs_ex_coinbase": 2403.88812840,
    "unspendable": 0.00000000,
    "unspendables": {
      "genesis_block": 0.00000000,
      "bip30": 0.00000000,
      "scripts": 0.00000000,
      "unclaimed_rewards": 0.00000000
    }
  }
}

$ bitcoin-cli getblockstats 920278
{
  "avgfee": 716,
  "avgfeerate": 2,
  "avgtxsize": 440,
  "blockhash": "00000000000000000000743a4375444bedcfe2ebd211cc98199bf0ed468bb4ad",
  "feerate_percentiles": [
    1,
    1,
    2,
    3,
    4
  ],
  "height": 920278,
  "ins": 1985,
  "maxfee": 66112,
  "maxfeerate": 73,
  "maxtxsize": 71041,
  "medianfee": 333,
  "mediantime": 1761146044,
  "mediantxsize": 223,
  "minfee": 99,
  "minfeerate": 1,
  "mintxsize": 150,
  "outs": 2038,
  "subsidy": 312500000,
  "swtotal_size": 364039,
  "swtotal_weight": 819214,
  "swtxs": 790,
  "time": 1761149342,
  "total_out": 240388812840,
  "total_size": 391612,
  "total_weight": 929506,
  "totalfee": 636884,
  "txs": 890,
  "utxo_increase": 53,
  "utxo_size_inc": 5124,
  "utxo_increase_actual": -21,
  "utxo_size_inc_actual": -1561
}

$ bitcoin-cli getnettotals
{
  "totalbytesrecv": 1797968536,
  "totalbytessent": 4161226065,
  "timemillis": 1761149367153,
  "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 libre-relay-v30.0-1 - server 70016/Satoshi:30.0.0/

         ipv4     npr   total   block   libre
in         29       2      31
out        14       0      14       2       4
total      43       2      45

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

Local addresses: n/a


$ bitcoin-cli -addrinfo
{
  "addresses_known": {
    "ipv4": 64737,
    "ipv6": 0,
    "onion": 0,
    "i2p": 0,
    "cjdns": 0,
    "total": 64737
  }
}

$ halving.sh 920278
=====================================
  Bitcoin Block Halving prediction
=====================================

bc=920278
gbt=1231006505
bbt=1761149342

This is average time to mine a block
(1761149342-1231006505)/920278
bts=576.0675153947878849783598

Now let's multiply that by 1050000
which is the block number of next
halving and get the prediction:
Sun Mar  5 14:06:12 UTC 2028

-------------------------------------
Next palindrome will be 921129
predicted to happen at this time:
Tue Oct 28 08:19:35 UTC 2025

-------------------------------------
Current mining epoch number is 456.
The next fortnight happens in block
921312 and probably around this time:
Wed Oct 29 13:36:35 UTC 2025

### v2_peerinfo are in v2_peerinfo-bitcoin.txt
$ bitcoin-cli getpeerinfo | grep -w 'v2' | uniq -c
     24     "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

2738ea9516c38945
	47045d52640a638fa610857af9231211c5a61941cd902cea44a93c4ec3bfd9e6
a67c90b4e08696ec
	ac3df04cfaa9b52b8e831c65f100d03a877992b31df8efe80a77419375c67fef
ec8c3b49ca6f829f
	d328b02cf675b256047cd6f4910a89c86327318b363d15d154f1c65b2ebcdeb7
e7bb3d482e5189fd
	d479b520dc6e37f43311e12a18660047afc526728b4676d33cec2a9d1cddc431
7d86c05aacd07b59
	701b6529a15b45dde128dd862bc7a804cb1153db1d3dee933dd54f2d522f93eb
7b9a1ca6d304d08a
	39e8e2f90685918aa01d1aaf3a4c10d0f68f5ce34fec5ab577fc4bd327f94dd9
92e0e9b5aa78e16a
	92222f1fb3e9beaf51693fa93ecd6d8d2616802c8e8a9179db41082386df725f
ceec243f9226b854
	7c529895025a64714a858d73b38eff00a7cd91c97ffd95568ca32c98ad00c791
d97f3970b0902308
	871984c4485963debdec11480ddd60294326281e2fc19a983e40f64e30f93c89
424fb0ece87b423a
	2cf965fb761fa855935bf02fabeafd60bbb4a4583d650b487ebfe81df7cee182
b8c109ac3521a679
	473215624692621a5b5f36c8040238d181ca94fd1ef0818beb546e36373436fd
19b1095cbf60ead8
	4eb4d298ce12638286fbdea03f42b48fd32b478b001a202a417afdbb2b8a4950
6fc7e84a5d64615a
	63f15b08a2410f46a893874c703715b010842d9fa84f1a561a7e6b7b42a15dcc
04aa07772c9733eb
	dd613af085f9c9aac3a52e984051da05383468695404b89d76784910cc700bcf
a7e964f237149cc6
	66907e779f6cd0fcd6492f5340647fc210cb2b62c93133252dcd9fe538d1ad9b
50218d3ae77150a5
	d249c9df6ff72d5b6fd98ed8709af00ec8b369fd063ddd58740a5a59791914be
1af45e978d97c204
	ea73e537a459cb599c84b94429cdabaf98fc75619c2663be67351143025fafdc
e97211e49d86201c
	756186b5296ed7048eb929440addda0eea896b027f224b0db7b5e63116e3ff96
c8ddce40c5095f39
	b1a71b54dd519804d061f7790b33b9653d63b7016a1e9b22b0507efd4c9202ad
2c982c27b8cca00b
	02e6490261e4db66da0fa67d0b9fd0073cd26253ef5d58b92f4bcf4f73abf8d7
2a9e24951df8c55d
	b39d77e24d38b491065aeff5fe235eb9804d8e9b4a2b790e22fabd37d92afa59
9f90a75b73b1015a
	c6cf42d48b03f0a7266842747ff1333b1bf01d7f99baeee33fab3290dfdef2c6
5704066a645f2ea2
	2a5697edc481c18d4abe5d9e0acaf3f34490fd0ae76b377c630b07dbba5d03eb
a5f3de37b081032e
	77531b6c8fdb17f1ad2a3d75358dbef5c5024d3f285f3b6237d2cab25800eea3


$ niceblack.sh $BH $BC
   ___ ___   ___    ___ ______ ___  
  / _ \__ \ / _ \  |__ \____  / _ \ 
 | (_) | ) | | | |    ) |  / / (_) |
  \__, |/ /| | | |   / /  / / > _ < 
    / // /_| |_| |  / /_ / / | (_) |
   /_/|____|\___/  |____/_/   \___/ 

  ,----- .123 4567 89ab cdef -----,
  |                               |
  | ..   .... .... .... ....   .f |
  | 1.   .... 743a 4375 444b   1f |
  | 2.   edcf e2eb d211 cc98   2f |
  | 3.   199b f.ed 468b b4ad   3f |
  '===   ==== ==== ==== ====   ==='
   ak:   79f9 a5