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

Block 18393

Hash
000000a837ee79369b96dcb1884bfe7512f9d626899edfa9e2fb57f6423e51d5
Confirmations
23328
Time
2026-10-09 07:51:10 UTC
Median time
2026-10-09 07:42:27 UTC
Transactions
2
Size
6,663
Weight
15,153
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
d732c8918004266a03b0f9dc7ab1fde834f3b79ac92b99ec02a3438b53a15b87
Previous block
000000a7ffea8eff4e7bd03568167e4504aec38808eceaf20d56074a210b27ab
Next block
000000a070b68750b2ac0376bc49c2795fec4a59bc8373579340b970cccde285

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 18393 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
c9672f6b4bb8f07bf746eb24f43bdf16… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
20c790df79eb…a144f0e01e1f coinbase1250.00002088
a8cfa093b7fd…77327037d427 spends P2MR pays to P2MR111.99993330.00002088