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

Block 18156

Hash
000000abd72c68bbb5f30b5a21e799187a8004ad4ddba3668e3d6d15aa9e9668
Confirmations
23462
Time
2026-10-09 01:11:44 UTC
Median time
2026-10-09 01:02:59 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
b9dd035316918247a944516f4ab916298d6495164e53ab588ae1ba9eaff66528
Previous block
0000010fb6617cf3245672c75c81cbbbc45b15d7b5776757551909adc0d9fd57
Next block
0000005dbe4da421b93e5fb0d395478875d2fd2218da53a53d143bbb5dcd33a8

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 18156 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
e0aa5c2bdd49eee9a542a4f1dc220107… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b9dd03531691…ba9eaff66528 coinbase1250