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

Block 19839

Hash
0000000b07a8749db2d63389eb7f5846f2e3a68ca2a570ab03207a0f8170218f
Confirmations
22297
Time
2026-10-11 00:11:54 UTC
Median time
2026-10-11 00:03:58 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
8bd96c2b8dbeb3399b714557366324eabf847e56d8943670e6ea02c11ba68ce5
Previous block
000000f63ce12e93549b4156cae5c4084daa77fb08adc80a5ccc1157ac4281c6
Next block
000000564dd763237f1ae212ba369d560cb3b4fdfab5aaa0afb85cc34993730e

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 19839 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
43e070920f6dc648b20f1ae6db657016… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
8bd96c2b8dbe…02c11ba68ce5 coinbase1250