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

Block 18679

Hash
0000004153a7152f2862e7d928c5ff4f4d88c826af4c0dd9b3180210013b12c9
Confirmations
23092
Time
2026-10-09 15:43:43 UTC
Median time
2026-10-09 15:35:21 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
90fd6829dcdab0403bfd694cef12ea0f4e9fa1e7a6c3964ea7e2212e1a250c66
Previous block
000000c97bccc0c7d6db32a6aea00e80bc64629ee75abdf82be2920a5f4bf980
Next block
000000623ddcec62818064773e3985f7860fe6a77f24814d51bb913d950566f6

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 18679 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
4e0f8559e4a4f7620c95ca5e56c07cde… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
90fd6829dcda…212e1a250c66 coinbase1250