# on receiving block 906154 here
$ date -u '+%Y-%m-%dT%H:%M:%SZ'
2025-07-19T00:24:55Z
# as written in the block header
2025-07-19T00:24:29Z

$ uptime   # since last reboot
 00:24:54 up 166 days, 12:04,  0 users,  load average: 2.48, 2.09, 2.41

$ battery.sh
140%, Power Supply Online

$ uname -smnr
Linux singer 6.6.37-0-lts x86_64

$ grep ^MemAvailable /proc/meminfo
MemAvailable:    1599456 kB

$ du -h -d1 .bitcoin/
11.4G	.bitcoin/indexes
2.9G	.bitcoin/signet
3.8M	.bitcoin/wallets
97.7G	.bitcoin/blocks
10.8G	.bitcoin/chainstate
122.8G	.bitcoin/

$ df -h .
Filesystem                Size      Used Available Use% Mounted on
/dev/sda3               911.4G    840.6G     69.8G  92% /

$ bitcoind -version
Bitcoin Core daemon version v29.99.0-5f9c5597106e
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
906154

$ BH=$(bitcoin-cli getblockhash 906154); echo $BH
00000000000000000000cb55a65a96f0218fede91022590d179dc223ca39c157

$ bitcoin-cli getblockheader 00000000000000000000cb55a65a96f0218fede91022590d179dc223ca39c157
{
  "hash": "00000000000000000000cb55a65a96f0218fede91022590d179dc223ca39c157",
  "confirmations": 1,
  "height": 906154,
  "version": 1073733632,
  "versionHex": "3fffe000",
  "merkleroot": "2efada9c3f8b3b96d4e4359d1d7ed625bd78c4f3c65f35675d8beb0c247d7a83",
  "time": 1752884669,
  "mediantime": 1752881480,
  "nonce": 154617897,
  "bits": "17023aa6",
  "target": "000000000000000000023aa60000000000000000000000000000000000000000",
  "difficulty": 126271255279307,
  "chainwork": "0000000000000000000000000000000000000000d345e38a46bd74624c2c6f5f",
  "nTx": 3062,
  "previousblockhash": "000000000000000000004d1dd070362eb2b83a75e570cbeeb5c9b6f29681c2c7"
}


$ echo $BH | tr 0 . | fold -w 4 | paste -d " " - - - -
.... .... .... ....
.... cb55 a65a 96f.
218f ede9 1.22 59.d
179d c223 ca39 c157

$ : 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
906154 sf: 96f. 1.22 59.d c157 

$ : 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 .
906154 sk: c157 85

$ : 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 .
906154 ak: a.66 85

### niceblack moved to the end

$ bitcoin-cli getmempoolinfo
{
  "loaded": true,
  "size": 13972,
  "bytes": 14507615,
  "usage": 76820400,
  "total_fee": 0.04845868,
  "maxmempool": 300000000,
  "mempoolminfee": 0.00000100,
  "minrelaytxfee": 0.00000100,
  "incrementalrelayfee": 0.00000100,
  "unbroadcastcount": 0,
  "fullrbf": true
}

$ gmm.sh
333

## Current epoch estimation is -0.3%
## 970 of 2016, i.e. 48%, 1046 to go
## Current and previous two in numbers:
$ bitcoin-cli getnetworkhashps 2016
8.998444541678953e+20
$ bitcoin-cli getnetworkhashps 2016 905183
9.025885092859546e+20
$ bitcoin-cli getnetworkhashps 2016 903167
8.366861911869141e+20

$ bitcoin-cli gettxoutsetinfo muhash
{
  "height": 906154,
  "bestblock": "00000000000000000000cb55a65a96f0218fede91022590d179dc223ca39c157",
  "txouts": 167138178,
  "bogosize": 13095012787,
  "muhash": "a2dd268b0077386213e44da7fca8109bd33b06df263e97956db9ad28a5b3c5cd",
  "total_amount": 19894013.32582487,
  "total_unspendable_amount": 221.04917513,
  "block_info": {
    "prevout_spent": 3520.21537370,
    "coinbase": 3.15996692,
    "new_outputs_ex_coinbase": 3520.18040678,
    "unspendable": 0.00000000,
    "unspendables": {
      "genesis_block": 0.00000000,
      "bip30": 0.00000000,
      "scripts": 0.00000000,
      "unclaimed_rewards": 0.00000000
    }
  }
}

$ bitcoin-cli getblockstats 906154
{
  "avgfee": 1142,
  "avgfeerate": 3,
  "avgtxsize": 557,
  "blockhash": "00000000000000000000cb55a65a96f0218fede91022590d179dc223ca39c157",
  "feerate_percentiles": [
    1,
    1,
    2,
    3,
    5
  ],
  "height": 906154,
  "ins": 7937,
  "maxfee": 116116,
  "maxfeerate": 254,
  "maxtxsize": 147053,
  "medianfee": 446,
  "mediantime": 1752881480,
  "mediantxsize": 226,
  "minfee": 116,
  "minfeerate": 1,
  "mintxsize": 150,
  "outs": 9912,
  "subsidy": 312500000,
  "swtotal_size": 1630243,
  "swtotal_weight": 3684214,
  "swtxs": 2839,
  "time": 1752884669,
  "total_out": 352018040678,
  "total_size": 1707143,
  "total_weight": 3991814,
  "totalfee": 3496692,
  "txs": 3062,
  "utxo_increase": 1975,
  "utxo_size_inc": 140355,
  "utxo_increase_actual": 1594,
  "utxo_size_inc_actual": 105460
}

$ bitcoin-cli getnettotals
{
  "totalbytesrecv": 10125111553,
  "totalbytessent": 22886350413,
  "timemillis": 1752884695501,
  "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 v29.99.0-5f9c5597106e - server 70016/Satoshi:29.99.0/

         ipv4     npr   total   block   libre
in         26       2      28
out        14       0      14       2       4
total      40       2      42

Local addresses: n/a


$ bitcoin-cli -addrinfo
{
  "addresses_known": {
    "ipv4": 62197,
    "ipv6": 0,
    "onion": 0,
    "i2p": 0,
    "cjdns": 0,
    "total": 62197
  }
}

$ halving.sh 906154
=====================================
  Bitcoin Block Halving prediction
=====================================

bc=906154
gbt=1231006505
bbt=1752884669

This is average time to mine a block
(1752884669-1231006505)/906154
bts=575.9259332012735128096186

Now let's multiply that by 1050000
which is the block number of next
halving and get the prediction:
Fri Mar  3 20:48:30 UTC 2028

-------------------------------------
Next palindrome will be 906609
predicted to happen at this time:
Tue Jul 22 01:11:55 UTC 2025

-------------------------------------
Current mining epoch number is 449.
The next fortnight happens in block
907200 and probably around this time:
Fri Jul 25 23:44:47 UTC 2025

### v2_peerinfo are in v2_peerinfo-bitcoin.txt
$ bitcoin-cli getpeerinfo | grep -w 'v2' | uniq -c
     21     "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

b3ed804c370d40e7
	a48bede8229790e6837a53a0c77257d4971a0afa377ceebe7db2742fb8dbc0b0
9e6701c009205411
	d01701aaa70964f837072006048cd0a42f31418aff8dcc25559e8f2292afc137
7b9a1ca6d304d08a
	b1000a52db0867633071e45a574d8e48876dbdc02d85f8554b7300a3d43b1757
74026556dec85b12
	e6fcd96e43bb22b5b96e8cbf5f0387dd6d9ab36551e77489fdce1469f3f38602
5edd4df6e5dd001e
	adec5f922ae91d175999ed4db233deffa920c923fa5760cee755bbe0e20676b6
2a83937f2ce67b3d
	05c8a282d10f2f3aaec9d5ef54edc48786101049ad2553c84572b98f184cabfc
9424716c930df331
	149acbdf685c9235f55c5521737b54e20839d6c83c4aa1b8f4d4851907667654
8f6db2241c953a5b
	a647df4db6e4fad16929af25fef3e1eb24a4f55e14a6f1e7f68a8a70c5a77ca2
4741ea595cf7e485
	05de41eab44b158ed26de5a82d4f5320dc21a0f895ace6611ff7801400d2a793
7a1bcf7e4b9dc15b
	e7f7c929a378fe604ebb469cf7509f8a5b74af5c921538263d27fcb6be32f793
304763668ec453f0
	b430e34c5b51de5d7b390d95c596fded01021d0c9a7d6ae4473c1cfa82809813
716217be0b59d813
	95292d86f74c172dcdedc4a693dbc5c6638631765e9d39b7f066836571252abd
d71a2a8501b5565b
	145982966bb54ce641bcb2278d44dff3cf9b73ca5110efb0a2c8d8445d4404a1
35e4a85ae5dc6bd9
	7d2d5214ea9b6cba551d687633200661ee282f2de4031422d314f350827ca5f1
5873cd12c2a721ee
	4aafef14eb1931cc1881e587f9a95777ea71ff802d64dec9b03c657b04476f5a
7a888dfc22a33814
	481f87f463eaf1f2b963dd04bce8989737adf783818e640f89c5312289707290
367d0597764feac4
	17881e752a295d8c8895c1366f2588a3f1486bcc6f0a5de2eabbb63c80bab0cc
f5cba9bdc5a91076
	03d7f8e6703141f7e9ee150c8de0a3e45f4f927b28b5bbdb6175583c2d9494ad
19bfac0bcd296543
	9e9d275435f9bdaf89dbdc01b4deae04d6748e8e06cd21bd1058ee661f9296fb
f65dd1cdae51ead4
	f5788b494f688c9abd97bfe4341c78426102b87afd97a38d9d7f12b091179ae1
776ef478353b6aa2
	0b4abab620bdacb7100a25de974c95916ca960931ce9983dd75c9f1c1de89bc7


$ niceblack.sh $BH $BC
          __   __         __  
         / /  / /__  ____/ /__
        / _ \/ / _ \/ __/  '_/
       /_.__/_/\___/\__/_/\_\ 

      ___  ___  ___________ ____
     / _ \/ _ \/ __<  / __// / /
     \_, / // / _ \/ /__ \/_  _/
    /___/\___/\___/_/____/ /_/  

  ,----- .123 4567 89ab cdef -----,
  |                               |
  | ..   .... .... .... ....   .f |
  | 1.   .... cb55 a65a 96f.   1f |
  | 2.   218f ede9 1.22 59.d   2f |
  | 3.   179d c223 ca39 c157   3f |
  '===   ==== ==== ==== ====   ==='
   ak:   a.66 85