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

Block 18809

Hash
000000e3342ac121c7c7c68516cb29eac807379cc5d7d11fad3ef5c79fa800cc
Confirmations
23625
Time
2026-10-09 19:18:14 UTC
Median time
2026-10-09 19:10:31 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
99a6caa0967fcd04e00ce8ae43ab3de01f4980c83fe114186560b9eec947aa91
Previous block
000000726dac12455a0ca084eb8becd15936ddcac5c5b63da7222ecce0787dae
Next block
00000060f64b5d9f41bb51c2bb903e66b2745b0fcc50e4bbf3f20332fd45bb4c

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 18809 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
9c69dd99f179ccef07b6ee05c4ebe1e9… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
99a6caa0967f…b9eec947aa91 coinbase1250