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

Block 18855

Hash
000000f52ac7fa7289163f1f5907d4f7ea029226813229be3621b5b11778bf1e
Confirmations
23431
Time
2026-10-09 20:34:35 UTC
Median time
2026-10-09 20:26:51 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
ecf37f7cfabf205dc879ed2e766718be8209cf197dea8494f6d6e1f6bf02db09
Previous block
00000092a388a654b36e77fc58f8525b8606e529b48fd65a30db4442d500bac2
Next block
0000007a3b7f501dc787a3d4fe594912e159c42dc23b866ae87df4610bd4a981

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 18855 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
bd05aa9207cab90e5770b543bfb6f95c… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
ecf37f7cfabf…e1f6bf02db09 coinbase1250