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

Block 19799

Hash
000000939c67d43ef97b2ff2cd8733008a3b89f82a12d12a16b8b738b093e4dc
Confirmations
21390
Time
2026-10-10 23:07:00 UTC
Median time
2026-10-10 22:58:30 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
b4edef232178edc7695215c6aa19bb441624ba634d176f1c730a9f3c99ae9abf
Previous block
0000007d73d0ab5cb12c3d72235648ce1fb71aae43a48ce45c198e80cff91f7c
Next block
000000d00e64341d1a5333d4a199b0d579f1ec582ef31be41b2b3971c3e0abcb

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 19799 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
1bab0a0ddbd35f10b3c9e4b98c7c506d… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b4edef232178…9f3c99ae9abf coinbase1250