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

Block 18699

Hash
000000990cbef759bed32c0e4a2e2bec3cede8fe7795dae7381f651ad4b26888
Confirmations
22490
Time
2026-10-09 16:16:08 UTC
Median time
2026-10-09 16:08:05 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
e7a3601c7eca961bc4c8a36b1fa1903a0998fe85eb7c44e4930542d78de1ae17
Previous block
00000001f9e6ddf34e5508d67ff166352f88651ff312e7a9b2f332563c5f851b
Next block
000000904bc90cdd70eb4b4a838d140947ed851d7b3d922a9dd22f79c6b4cbcb

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 18699 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
1aabecadd4a524fe1aefe86ebcbc9bab… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
e7a3601c7eca…42d78de1ae17 coinbase1250