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

Block 18718

Hash
000000b355b1c977ffa61b07626c2ebc477886b512d9c2be16ffb90e898c4194
Confirmations
23289
Time
2026-10-09 16:47:58 UTC
Median time
2026-10-09 16:39:38 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
5a0ad331f290b3295313f1105b317a153d44e07596388fba522e106ccdc4e1e8
Previous block
0000006531425da25dc7d8d0d64c58efc2334e221071c517bf99772d084828cf
Next block
0000002b5a4b3292c4c2c9494299a6e8ad2218dfbd44a6da894b266968574d93

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 18718 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
711f7f7668c74ee6ecc6f54ea54f3970… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
5a0ad331f290…106ccdc4e1e8 coinbase1250