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

Block 19764

Hash
00000021bef8c298e137398da4d9e12ffb1ba2225380dc46d512cfac330c1bcd
Confirmations
20461
Time
2026-10-10 22:08:02 UTC
Median time
2026-10-10 22:00:07 UTC
Transactions
2
Size
3,166
Weight
11,908
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
a75ac4e48249a94f777f0b06e6b65fdc838d2bf4d507fc631048f7e82b6f7dab
Previous block
00000093f2f2bc4931c11c3a000d9fb1d4a566c3446f3dc072371dcb83fba3ca
Next block
000000226a3a8cc92d97e482c7ec024c097b4db7eeb0f8271e7ef75e4634d252

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 19764 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
fca3b7664ff1226132eefb80be0aee18… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
268773469955…3d5d860fa7c0 coinbase1250.0000232
9e478e987fdc…c3f77be6aedc pays to P2MR220.01995340.0000232