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

Block 18066

Hash
000000491f6e77b0988a643a508b68e20f93d1d44b5cdc7049b106ad4e55b515
Confirmations
23884
Time
2026-10-08 22:39:52 UTC
Median time
2026-10-08 22:31:37 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0040172004
Bits
1e00f8ed
Merkle root
13c446c9e21523ae08fc29c111dc7b329e6c55c7850b84274136976f9286e14a
Previous block
0000003c0bd183d8666982834f006f9fbfc283c644572067bbdd17ca599e1e0a
Next block
000000031aa06d836537e97bf6058649433f9bb7735f4fbc612a96212d9b3b32

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 18066 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
dd420f759f0e1c1226c9884b6e835d98… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
13c446c9e215…976f9286e14a coinbase1250