Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 19403

Hash
00000084b988004b2e6a147147cfcb38fe7232b2fb783606de0850594e0cd48f
Confirmations
21618
Time
2026-10-10 12:00:56 UTC
Median time
2026-10-10 11:52:51 UTC
Transactions
3
Size
6,980
Weight
16,010
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f1744255117b75793a7628e0764bb5ea4fb840f69aeac2e8b19cbbd8c8bc063c
Previous block
0000004e0dd0784d471ad375535caa8fccf0b786adb34a6b33682b32323323ad
Next block
0000011ce8361ff8bb38211aec223a0e01394d0872f9ed2a2cc52ecc00e111a1

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 19403 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
b2eda975f23e7eadd20f9cceaff18e8f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
16aba8da60e1…b5b13a4bb284 coinbase1250.00002518
93f4a4418449…069e86bae17f spends P2MR pays to P2MR120.999996560.00000344
37fb6759ae26…90e18469c517 spends P2MR pays to P2MR120.999978260.00002174