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

Block 18258

Hash
000000ca3ff7180b2e06a48f3e4fd3d46921af83013e8ab3162ddde17b6d7e16
Confirmations
22542
Time
2026-10-09 04:03:03 UTC
Median time
2026-10-09 03:55:11 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
0a5404d3c831b3c1d4449b69d60f9dfa55425f7ea4df66ab2f07782d8836bbb6
Previous block
0000006ab5e11738d141d99fb21bc83fb7163cba03d084f07c48ff3df20b52f6
Next block
0000001ddfbcf30b92460ec1e5be2439d8d61eb8e4231104ce4fdfbb7e95d0ba

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 18258 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
48a7cb6a53189d576de132133e8279b8… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
0a5404d3c831…782d8836bbb6 coinbase1250