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

Block 18308

Hash
00000045b921012398762e24ac1b95be7a5fce6c2d820bd294e171f54f2d0304
Confirmations
23870
Time
2026-10-09 05:26:20 UTC
Median time
2026-10-09 05:17:53 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
dfca13c324af28820bd64a80d654b4318f226427222af922134b5f543d8b1b2b
Previous block
000000d5007482dee178cb8d60aacab6089a15774669056459a432d4f3c1eb57
Next block
000000549b5cb8af3dd32e7afb5b371bbc9496b3e1d148df51344f1fce7de3c3

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 18308 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
a3bb1b6326e68acf52fc7dd07f27cc15… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
dfca13c324af…5f543d8b1b2b coinbase1250