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

Block 18438

Hash
000000294e01aeb3dc868c5dc638c429bd0db567cccf9e19d9b5f5b8388e3b03
Confirmations
21895
Time
2026-10-09 09:06:09 UTC
Median time
2026-10-09 08:57:57 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2323831112b44bab6a0591559235c92a5fd56fb3153582a639efd7256632ca0f
Previous block
00000087cfd908659b7e1c3814fb92d472296d11f6a948211f8324a3c43f9b1e
Next block
000000e2abbc72088fd728bb96848f895788a3e366e2671da3bc61fe18a9d03e

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 18438 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
7f631a7b30482425b630c0ce6b39ef53… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2323831112b4…d7256632ca0f coinbase1250