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

Block 18400

Hash
0000004e5ba05bf38311e1ac220e19d67c8ace027fb0b52e524125bef4d00afa
Confirmations
23477
Time
2026-10-09 08:03:07 UTC
Median time
2026-10-09 07:54:23 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
3ebde2524d72212aeb34629b53a4346a2485bf741bdd627a77052eff27740572
Previous block
00000057f92d02601728ae7d972b70163b1a99937f3b98285176fa7bdeacd747
Next block
0000003554a6277becdd71c3a7a41f9aae119a391a164fc1f467389e5f8d3f37

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 18400 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
944b4e5c561ba7962891d0068e861e48… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
3ebde2524d72…2eff27740572 coinbase1250