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

Block 18739

Hash
0000007183af361cef75fe8444177f45bfcfae7f99b43264d7fdbe0341976cf4
Confirmations
23428
Time
2026-10-09 17:22:24 UTC
Median time
2026-10-09 17:14:14 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
74207abc2ddb4a047549bf67df802acd37693c4562341a14800a3965a069e9bf
Previous block
0000011bb1f8e0451b87cdc5434f192a0a29a9f819a99dc261000ba921cbf96a
Next block
0000009cdb9d5d005824bb728cd103c230a4d7329e7515fa75828e1d71d271bb

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 18739 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
8866244c182d84363c78750910f12fc9… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
74207abc2ddb…3965a069e9bf coinbase1250