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

Block 19810

Hash
000000a2e37798d27e3a3e1be147ba00af6cfea830a7363b9521f0f65b2cb3e1
Confirmations
21818
Time
2026-10-10 23:25:24 UTC
Median time
2026-10-10 23:17:12 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
d149ecae4a093bc1ba4672b0010d6479ec5237b81a3a0691e88c7a8b25659444
Previous block
0000003f8da2a7bde26bce7abed7684e74ee2d9108ae1251886d3f3e397816ab
Next block
00000045fabec3bb6c381d9ed8072b2f0e6b48f6c40e6ace74ec26eecb62f827

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 19810 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
4a79bbb28ad6325521c736f5d7bfacb8… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
d149ecae4a09…7a8b25659444 coinbase1250