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

Block 19389

Hash
0000006676190149431a66d5707b90bd9d892a4e568569ccd341928af2f3a8a6
Confirmations
21513
Time
2026-10-10 11:38:26 UTC
Median time
2026-10-10 11:29:48 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
add3a4d673f13afd16befb14c11696bc4c15502ec3c49d00a5c3b140e0e79a12
Previous block
00000072d64ddfc4dece571fe6603929d29d1be152b779e8b88d0a073ad28196
Next block
00000011dab03fa4f449d0c9519b8c33c0cbf5f2d31a568ad190e83ecd9b94e5

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 19389 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
293ef78ac84fdd1a823dcb62e037b52f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
add3a4d673f1…b140e0e79a12 coinbase1250