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

Block 18495

Hash
000000551d23553590a7dd20d562132b6dc91803be1d40a9e0b079eb9ca40fc2
Confirmations
21683
Time
2026-10-09 10:40:45 UTC
Median time
2026-10-09 10:32:27 UTC
Transactions
2
Size
3,046
Weight
11,665
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2436fa55fba13a12a8357c5ff6f801612b183376a8247464973b541f2c7bb876
Previous block
00000008b3912afd6480ba2ed38fefa066bb850bb7101fc6d9cbf869a4b0064f
Next block
000000d4c1a8b5964e1a8b37e947593bfadf795cd56e29d4f75b4d22e0934bb3

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 18495 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
e6303d7bf03ed1998dc54ddf5d4086b1… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
1340b626449f…dd0162b81b82 coinbase1250.00000344
54924c0b14a9…466d991308d8 spends P2MR pays to P2MR120.399989680.00000344