# on receiving block 902903 here
$ date -u '+%Y-%m-%dT%H:%M:%SZ'
2025-06-27T05:14:50Z
# as written in the block header
2025-06-27T05:14:38Z
$ uptime # since last reboot
05:14:49 up 144 days, 16:54, 0 users, load average: 2.09, 2.17, 2.15
$ battery.sh
140%, Power Supply Online
$ uname -smnr
Linux singer 6.6.37-0-lts x86_64
$ grep ^MemAvailable /proc/meminfo
MemAvailable: 1694260 kB
$ du -h -d1 .bitcoin/
11.3G .bitcoin/indexes
2.7G .bitcoin/signet
3.4M .bitcoin/wallets
97.7G .bitcoin/blocks
10.8G .bitcoin/chainstate
122.5G .bitcoin/
$ df -h .
Filesystem Size Used Available Use% Mounted on
/dev/sda3 911.4G 837.4G 73.1G 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
902903
$ BH=$(bitcoin-cli getblockhash 902903); echo $BH
000000000000000000016be026fedb91b1cca525dd3ab0ba11e8e5b6b58fe213
$ bitcoin-cli getblockheader 000000000000000000016be026fedb91b1cca525dd3ab0ba11e8e5b6b58fe213
{
"hash": "000000000000000000016be026fedb91b1cca525dd3ab0ba11e8e5b6b58fe213",
"confirmations": 1,
"height": 902903,
"version": 571285504,
"versionHex": "220d2000",
"merkleroot": "7ec18aaddafdf5c877a917ba2c18a9e24819773c1e6d5c10182cc40444620ea3",
"time": 1751001278,
"mediantime": 1750997948,
"nonce": 1731457213,
"bits": "17023a04",
"target": "000000000000000000023a040000000000000000000000000000000000000000",
"difficulty": 126411437451912.2,
"chainwork": "0000000000000000000000000000000000000000cdd60507529425277b4cf060",
"nTx": 2480,
"previousblockhash": "000000000000000000012e2a5549113857fca66ebe13a611b55a8a9541881749"
}
$ echo $BH | tr 0 . | fold -w 4 | paste -d " " - - - -
.... .... .... ....
...1 6be. 26fe db91
b1cc a525 dd3a b.ba
11e8 e5b6 b58f e213
$ : 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
902903 sf: ...1 6be. b.ba e213
$ : 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 .
902903 sk: e213 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 .
902903 ak: 4c25 94
### niceblack moved to the end
$ bitcoin-cli getmempoolinfo
{
"loaded": true,
"size": 72971,
"bytes": 25375481,
"usage": 172133168,
"total_fee": 0.16075231,
"maxmempool": 300000000,
"mempoolminfee": 0.00000100,
"minrelaytxfee": 0.00000100,
"incrementalrelayfee": 0.00000100,
"unbroadcastcount": 0,
"fullrbf": true
}
$ gmm.sh
633
## Current epoch estimation is -6.43%
## 1751 of 2016, i.e. 86%, 265 to go
## Current and previous two in numbers:
$ bitcoin-cli getnetworkhashps 2016
8.464953813437646e+20
$ bitcoin-cli getnetworkhashps 2016 901151
9.04687914735697e+20
$ bitcoin-cli getnetworkhashps 2016 899135
9.088485232729964e+20
$ bitcoin-cli gettxoutsetinfo muhash
{
"height": 902903,
"bestblock": "000000000000000000016be026fedb91b1cca525dd3ab0ba11e8e5b6b58fe213",
"txouts": 168042821,
"bogosize": 13164800513,
"muhash": "b17bf96472e731711b49242c7d8a55ab9e295ebf63313871862b21fbeee032be",
"total_amount": 19883853.95610327,
"total_unspendable_amount": 221.04389673,
"block_info": {
"prevout_spent": 4531.95101943,
"coinbase": 3.16017986,
"new_outputs_ex_coinbase": 4531.91583957,
"unspendable": 0.00000000,
"unspendables": {
"genesis_block": 0.00000000,
"bip30": 0.00000000,
"scripts": 0.00000000,
"unclaimed_rewards": 0.00000000
}
}
}
$ bitcoin-cli getblockstats 902903
{
"avgfee": 1419,
"avgfeerate": 3,
"avgtxsize": 596,
"blockhash": "000000000000000000016be026fedb91b1cca525dd3ab0ba11e8e5b6b58fe213",
"feerate_percentiles": [
2,
2,
2,
3,
5
],
"height": 902903,
"ins": 7486,
"maxfee": 148088,
"maxfeerate": 301,
"maxtxsize": 73805,
"medianfee": 489,
"mediantime": 1750997948,
"mediantxsize": 234,
"minfee": 121,
"minfeerate": 1,
"mintxsize": 150,
"outs": 6808,
"subsidy": 312500000,
"swtotal_size": 1129846,
"swtotal_weight": 2591359,
"swtxs": 2287,
"time": 1751001278,
"total_out": 453191583957,
"total_size": 1479912,
"total_weight": 3991623,
"totalfee": 3517986,
"txs": 2480,
"utxo_increase": -678,
"utxo_size_inc": -49945,
"utxo_increase_actual": -813,
"utxo_size_inc_actual": -61793
}
$ bitcoin-cli getnettotals
{
"totalbytesrecv": 2097076336,
"totalbytessent": 3550938363,
"timemillis": 1751001290545,
"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 20 2 22
out 14 0 14 2 4
total 34 2 36
Local addresses: n/a
$ bitcoin-cli -addrinfo
{
"addresses_known": {
"ipv4": 64327,
"ipv6": 0,
"onion": 0,
"i2p": 0,
"cjdns": 0,
"total": 64327
}
}
$ halving.sh 902903
=====================================
Bitcoin Block Halving prediction
=====================================
bc=902903
gbt=1231006505
bbt=1751001278
This is average time to mine a block
(1751001278-1231006505)/902903
bts=575.9136884984450174104888
Now let's multiply that by 1050000
which is the block number of next
halving and get the prediction:
Fri Mar 3 17:14:13 UTC 2028
-------------------------------------
Next palindrome will be 903309
predicted to happen at this time:
Sun Jun 29 22:11:38 UTC 2025
-------------------------------------
Current mining epoch number is 447.
The next fortnight happens in block
903168 and probably around this time:
Sat Jun 28 23:38:15 UTC 2025
### v2_peerinfo are in v2_peerinfo-bitcoin.txt
$ bitcoin-cli getpeerinfo | grep -w 'v2' | uniq -c
12 "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
be6640a576d42893
5b9deb5314e75bfa81c787e29c24ac72e2df85af99aee43d3f1743ad1c03039f
933e18b8edbce05c
fecba41847d88adca56e58a731ba07766cc635aeb2816b5de7a7e003361bb04d
cc2f18a4bc431245
d223157daf147fc4d1ca2b9822ff0676dfe50e6ba943f041594bfb45708823c0
0cf28f8d33c10e9d
85ca64535ebdff3716be4f20aa11c1e88c0a691db110d21b799aa20aa24a00f7
952c29ffb60124fb
6fd28e9939a3b80afa2a9db0302df280fb551719dd093223f577196d1e57e362
74026556dec85b12
7bcf94d561e94ce637047658a07a8c0368c8fde60d8d4020b4930c5b31b07048
0e6c9b2cae4c6519
ac225a689bc6ce1945f5607ae028a51822fe249bc2f160b8f0b84e9c6b43c54d
070fa09d81bddbfc
96b3661ee28e2bfcf4ec993bb6e7895eb7d6f8bc65fb1c07138c04ba6bfc046b
23d7d434bb397eaf
b5657ff5400643c40493f26e3da28b7f7645d8209747bbb3827f6e95d9f5fd64
a1299e79849a8cd5
cdfbc99c6bba94bb69e1e0929a3ef691870075a1f90540899141fb51b95703d2
96a5c538c60619ef
fb505b2de4d09cc37175a91a2eafcfabb08283059b920621fd1b465087ebb0f5
1956ddc4d37429f5
e9e4809e3a3fbfc39672e2f8ff8d3a72484a701cb4207a793da246c6c5ee8a15
$ niceblack.sh $BH $BC
| | |
_ \ | _ \ _| | /
_.__/_|\___/\__|_\_\
_ \ \_ ) _ \ \__ /
\_ /( | /\_ /( |_ \
_/\__/___| _/\__/___/
,----- .123 4567 89ab cdef -----,
| |
| .. .... .... .... .... .f |
| 1. ...1 6be. 26fe db91 1f |
| 2. b1cc a525 dd3a b.ba 2f |
| 3. 11e8 e5b6 b58f e213 3f |
'=== ==== ==== ==== ==== ==='
ak: 4c25 94