# on receiving block 312976 here
$ date -u '+%Y-%m-%dT%H:%M:%SZ'
2026-07-13T09:10:17Z
# as written in the block header
2026-07-13T09:09:32Z

$ uptime   # since last reboot
 09:10:17 up 17 days,  1:41,  0 users,  load average: 0.36, 0.39, 0.49

$ battery.sh
100%, Power Supply Online

$ uname -smnr
Linux singer 6.18.2-0-lts x86_64

$ grep ^MemAvailable /proc/meminfo
MemAvailable:    2169596 kB

$ du -h -d1 .bitcoin/signet
311M	.bitcoin/signet/indexes
21M	.bitcoin/signet/wallets
514M	.bitcoin/signet/blocks
3.9G	.bitcoin/signet/chainstate
4.8G	.bitcoin/signet

$ df -h .
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3       912G  435G  476G  48% /

$ bitcoind -version
Bitcoin Core daemon version v31.1.0 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 -signet getblockcount); echo $BC
312976

$ BH=$(bitcoin-cli -signet getblockhash 312976); echo $BH
0000000a242da0359bf3f79dc4250babadbc8940d550f3619efc81bbc267437e

$ bitcoin-cli -signet getblockheader 0000000a242da0359bf3f79dc4250babadbc8940d550f3619efc81bbc267437e
{
  "hash": "0000000a242da0359bf3f79dc4250babadbc8940d550f3619efc81bbc267437e",
  "confirmations": 1,
  "height": 312976,
  "version": 536870912,
  "versionHex": "20000000",
  "merkleroot": "0b2c0a280ea035ae5ce5fdffbe3a706f61d1a751aea34d8e0242464169e73457",
  "time": 1783933772,
  "mediantime": 1783929081,
  "nonce": 76656220,
  "bits": "1d14ab71",
  "target": "00000014ab710000000000000000000000000000000000000000000000000000",
  "difficulty": 0.04837927401929265,
  "chainwork": "00000000000000000000000000000000000000000000000000000ef877d9bbea",
  "nTx": 68,
  "previousblockhash": "000000120770ff4e7097536def8b1d53b33079b0368b27351e7386b3d7c0b146"
}


$ echo $BH | tr 0 . | fold -w 4 | paste -d " " - - - -
.... ...a 242d a.35
9bf3 f79d c425 .bab
adbc 894. d55. f361
9efc 81bb c267 437e

$ : 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
312976 sf: ...a a.35 .bab 894. 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 .
312976 sk: 437e a1

$ : 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 .
312976 ak: bb61 a1

$ : Following is the jointkode
312976 jk: 437e bb61 a1

### niceblack moved to the end

$ bitcoin-cli -signet getmempoolinfo
{
  "loaded": true,
  "size": 12,
  "bytes": 1352,
  "usage": 18376,
  "total_fee": 0.00018777,
  "maxmempool": 300000000,
  "mempoolminfee": 0.00000100,
  "minrelaytxfee": 0.00000100,
  "incrementalrelayfee": 0.00000100,
  "unbroadcastcount": 1,
  "fullrbf": true,
  "permitbaremultisig": true,
  "maxdatacarriersize": 100000,
  "limitclustercount": 25,
  "limitclustersize": 101000,
  "optimal": true
}

$ gmm.sh
174

## Current epoch estimation is +0.14%
## 496 of 2016, i.e. 24%, 1520 to go
## Current and previous two in numbers:
$ bitcoin-cli -signet getnetworkhashps 2016
346734.2435903281
$ bitcoin-cli -signet getnetworkhashps 2016 312479
346247.1658164694
$ bitcoin-cli -signet getnetworkhashps 2016 310463
337230.1211738132

$ bitcoin-cli -signet getblockstats 312976
{
  "avgfee": 96676,
  "avgfeerate": 315,
  "avgtxsize": 463,
  "blockhash": "0000000a242da0359bf3f79dc4250babadbc8940d550f3619efc81bbc267437e",
  "feerate_percentiles": [
    0,
    1,
    3,
    4,
    15
  ],
  "height": 312976,
  "ins": 86,
  "maxfee": 6239306,
  "maxfeerate": 37699,
  "maxtxsize": 7044,
  "medianfee": 342,
  "mediantime": 1783929081,
  "mediantxsize": 291,
  "minfee": 14,
  "minfeerate": 0,
  "mintxsize": 142,
  "outs": 305,
  "subsidy": 2500000000,
  "swtotal_size": 30882,
  "swtotal_weight": 81579,
  "swtxs": 66,
  "time": 1783933772,
  "total_out": 3130467295491,
  "total_size": 31024,
  "total_weight": 82147,
  "totalfee": 6477340,
  "txs": 68,
  "utxo_increase": 219,
  "utxo_size_inc": 18429,
  "utxo_increase_actual": 178,
  "utxo_size_inc_actual": 13383
}

$ bitcoin-cli -signet getnettotals
{
  "totalbytesrecv": 29246113,
  "totalbytessent": 663369484,
  "timemillis": 1783933818100,
  "uploadtarget": {
    "timeframe": 86400,
    "target": 0,
    "target_reached": false,
    "serve_historical_blocks": true,
    "bytes_left_in_cycle": 0,
    "time_left_in_cycle": 0
  }
}

$ bitcoin-cli -signet -netinfo
Bitcoin Core client v31.1.0 signet - server 70016/Satoshi:31.1.0/

         ipv4   total   block  manual
in          8       8
out        11      11       2       1
total      19      19

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

Local addresses: n/a


$ bitcoin-cli -signet -addrinfo
{
  "addresses_known": {
    "ipv4": 967,
    "ipv6": 0,
    "onion": 0,
    "i2p": 0,
    "cjdns": 0,
    "total": 967
  }
}

### v2_peerinfo are in v2_peerinfo-signet.txt
$ bitcoin-cli -signet getpeerinfo | grep -w 'v2' | uniq -c
     14     "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

82b27e77426c9cf3
	ba4d455ae8e6348298bfe922b76397b047229e6fd8a093609569ce3666eb3c11
d93d2e33982b129d
	b397aa11603c9726c4fe4e4b7f23e1ecf6ebfa95ffa6108d945cc220459316f9
d3a35fabb60fb123
	89eb9ddf03d29b951cde923a7f28606e7df2ee42f02fba74bd3f62a217ba292c
318db5aec0bb42f2
	3db570b1b3bd6de4944d6fc1a067ae44cb2172e0d3eb2c8af98d37ce15caaa41
9c92af8aca057984
	4a3cd65a70c20953f645fea5e5af6a7cc0f01eae12af3928fa2496641334deb8
9c42b131cbafed94
	361b1dbdd2a2af96786c82688176f8d719caf94e1ee65b74ced5364a255ba209
fc0e313bd3acf04e
	26d120db8fd0556b47e39c428eb74ae8e6f94e19b79ffb445df313ede7cb5308
dbf0245fd5ffa992
	9d2c5d84fa43ed6c39ae376788fee5914c3ef30bc4463ab9252068c338f7280f
2c92bdda6fb6f85d
	f8ed3640b29fbe1222ed56b51cda5d7f15d9d752ddbce9a9c80c55709cfb035a
378235fcca984da1
	f468afa43d65a5c4011f6cdf2d10fb7c7d043962df118678f107a515cc006cdf
89907bdae68ccbe4
	bd5d5214a69700e0638bff3b88d0a35cb96b25dde8a547b629c78d2ec582e4d6
a953229644d7d8fd
	c70dc6823e926bb00062f5b6adeb33395b904d823747e99736f5dbc3c12dcb9d
116bab85103716b2
	c396a642e96331d4ba6ef33496a6e14e01084ff889d7294d9d43ff9637a44ec3
0be51bd680928c9a
	f7bc9247503507203e9bb74700fcf95d6a0e29772eb0f4c21563849485f7cfb7


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

  ,----- .123 4567 89ab cdef -----,
  |                               |
  | ..   .... ...a 242d a.35   .f |
  | 1.   9bf3 f79d c425 .bab   1f |
  | 2.   adbc 894. d55. f361   2f |
  | 3.   9efc 81bb c267 437e   3f |
  '===   ==== ==== ==== ====   ==='
   jk:   437e bb61 a1