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

Block 18278

Hash
000000b4426bfb081188e9bc0f9c888ad9c80625b9c14e91ec5854f758e435d9
Confirmations
23541
Time
2026-10-09 04:36:04 UTC
Median time
2026-10-09 04:28:00 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
b72752f6008ba7244e972261a9680ff43573743ebf27d1cbef3ffd70f6be328d
Previous block
00000053e2a0ace15acaeb6b63d8c5f86335a6bf6adf09a52b73085857fc6318
Next block
000000eadea6cac1b7f9894cc9ea8e8114e8d48b66ca07d2740a6a89f651e071

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 18278 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
a58b6aa1083e7c7db48ce0a74858228c… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b72752f6008b…fd70f6be328d coinbase1250