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

Block 18636

Hash
000000fa2e1c324dc8987fb2495e7c38c33a694f00450c629a19109415cd7fdd
Confirmations
22718
Time
2026-10-09 14:32:49 UTC
Median time
2026-10-09 14:24:47 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
b112d0b2faab04724fe6fa9c60f0dda26d7a4a4e1c8b08d2cd3ca126e288da43
Previous block
00000102886d39a55c2514458c85bd4380910830a81ff609e4b12ecbbadbe25e
Next block
0000002ca1384471e9b0bbb14798af1d8fd657a71058341ee864ecc2a269b0ef

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 18636 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
1b1bc8fef1c8e64505a41284d1330a76… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b112d0b2faab…a126e288da43 coinbase1250