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

Block 18191

Hash
0000008af9a8ff04cfb1e7f1ba9db11068c592af153b15790faad3fadf484a66
Confirmations
23088
Time
2026-10-09 02:10:16 UTC
Median time
2026-10-09 02:02:12 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f67ce92cdded6cb6d71bca3a39df76d36b04dc2ec9a08959aad33fe6e64749ba
Previous block
00000085347756e642cc6e1230a9249c2f106d173edc35d5ebc18a2dad651a0b
Next block
000000b19e8910e425c2118c1f22a811005b9c6ad425514fb17bfc64ddc621b2

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 18191 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
38a9f230a298d55b7fd01c15fcbb87dc… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f67ce92cdded…3fe6e64749ba coinbase1250