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

Block 18039

Hash
0000005408edc5a994456243d1ce5624ea1c29bdd929a5d18fb46b4be347377b
Confirmations
23049
Time
2026-10-08 21:53:37 UTC
Median time
2026-10-08 21:45:14 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0040172004
Bits
1e00f8ed
Merkle root
26fa18ea9b2c727bc6cce06440493c676acf4cf66dd487815d4b0deb36c9474e
Previous block
0000000e3b5d1f5eec6c148a15897c47a632370cc0802d08114789c387d4a593
Next block
000000c63c7e7c2c83baf329a5ada1a65c3670728a1288e81b4dd9994393aa34

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 18039 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
a6a89e563045b1c4cd162e414cc6077b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
26fa18ea9b2c…0deb36c9474e coinbase1250