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

Block 19802

Hash
00000049c90ba30a3cf8840cf63568dc33b5d4f3460806f1e45c87043631a52a
Confirmations
21609
Time
2026-10-10 23:11:56 UTC
Median time
2026-10-10 23:03:39 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c50a656f39bd96df1a7158cd3114f08eef00e5ebefe54585c78e71e3d99bb96d
Previous block
000000f2c1f31a2c36476f322ffa6f7a777e3bb4bdf4f6fcbfe75bb7c8b583ae
Next block
000000b0618f7e94de0a3e05befb7e60ccd4e1ff221a01007b2ba41e553cae44

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 19802 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
26d643a11296616010400671b0e61208… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c50a656f39bd…71e3d99bb96d coinbase1250