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

Block 18397

Hash
0000011b4dc15cf2a0560a7d480bef471b6b0d4175be81d82fa9f68e2989ed1c
Confirmations
23408
Time
2026-10-09 07:58:00 UTC
Median time
2026-10-09 07:49:38 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f74bae4d06186c95f66d1db7e8210702f88aff89e4e8c60fc8408979af9ea836
Previous block
000000e161cae623d33042986e98a6d7131ea9f62b7d4b3975860971d771ac84
Next block
000000f1b3c28385a50e9fffbde652d0f3dfb467a8dbcbdf338f7ed9e85548c8

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 18397 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
6b69f0904afdeb5c0fec9004ecb4f92c… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f74bae4d0618…8979af9ea836 coinbase1250