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

Block 18404

Hash
000000d5899db25a21697e3b582a50563ba13ae3d9b4cb820ee58582e6502e74
Confirmations
23372
Time
2026-10-09 08:09:21 UTC
Median time
2026-10-09 08:01:14 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
91a4b641961d5af4e2ad24f6708a71e79516ac14bc7900fb136a1bca82114598
Previous block
000000ff80f58b2dfceaf392b07ff7f567126ad687535dfad6862682fa0c0012
Next block
00000045e4d27088937d0897410a88ddf895fb7f0e24b06ec8be16d16838987f

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 18404 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
20acd392e9f74ad01d83cb5fc19741f0… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
91a4b641961d…1bca82114598 coinbase1250