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

Block 19772

Hash
0000005a7e082ff1f30035a9213d4d6772adb78b336906746a8a46dd2f30fa27
Confirmations
21041
Time
2026-10-10 22:21:45 UTC
Median time
2026-10-10 22:12:49 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
01f58b8641b78af476b2f4eea3b2ba7eb6a7a223e7abc8c49184dc6981db01a8
Previous block
000000a966e500e87af1e5eefddc62ed665c97f363679758e7a780c061805c94
Next block
0000003e8e0ed622fb5293bdecbf6d3d671523884fa2bb582b1e2ff5490f235d

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 19772 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
f96f2f8fb8266f8c484e8a93db13fd92… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
01f58b8641b7…dc6981db01a8 coinbase1250