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

Block 18378

Hash
000000a5506b5a1f055d77bafd7cc1f8af4c10b7caa3ab1466c46ba0ba083374
Confirmations
23757
Time
2026-10-09 07:24:32 UTC
Median time
2026-10-09 07:16:32 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2aa53275914990a6cd21b12b0eaf7a233f0d7cc918c153f25d4af96ece4d02bb
Previous block
000000ed55ce84eb0b7ffd5b333fdf3a1d2007ca77def1c6ffaf549b997507ed
Next block
0000004b5da82d7cb46a8dffdff7ed96d90233059ff5ea4fe934c9683e098421

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 18378 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
ead88d09a737fe1a0a398dcfc857d46a… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2aa532759149…f96ece4d02bb coinbase1250