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

Block 18742

Hash
0000005500aacb03c2552f38dcf49bfa958aec8fa3f5a2f4245a87865ad32aa1
Confirmations
23435
Time
2026-10-09 17:27:24 UTC
Median time
2026-10-09 17:19:18 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
a2b6a54215678226a8c2a32a870129213785fabc59692343c7673a23651f5cf8
Previous block
000000f74799ee29eaf33792765c8c10faf0325df3fc813f0eca61ec9ee3121f
Next block
000000c0b7d47a49b3667f952782f12f5f9abf9ea9a155fc84c46473170d0dea

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 18742 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
f34f2d12224d953d316aaba76b471d05… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
a2b6a5421567…3a23651f5cf8 coinbase1250