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

Block 18860

Hash
0000004f419cedbacd8ba3cdb4376158e652be6567c0d2dd1129a801960d635b
Confirmations
23401
Time
2026-10-09 20:42:59 UTC
Median time
2026-10-09 20:34:35 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
1fd5537cd696b5710b665ed52f84e8d29e4e1e612406db537498b306b23180a8
Previous block
0000001b626657bcfbb8dd617d09a21797a8b1e201b6edf32638e4aec7526966
Next block
0000011c04cfafcf82ee2bae2d41cfaab63136eb9d09fdcf8f8278f0286d5b55

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 18860 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
f2ad2a5e819cb2c0a6cc0fda568183e5… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
1fd5537cd696…b306b23180a8 coinbase1250