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

Block 19777

Hash
00000114d793757899d50f2d54fe46e2459de6270d052b6a42a73ea3e6ba8bc4
Confirmations
21439
Time
2026-10-10 22:30:02 UTC
Median time
2026-10-10 22:21:45 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
13a5954f437f0be17fc5d1f2000c52792f8fddc68785c590216d0029ec00d6be
Previous block
0000003f9ec3e8d9679cf632712abeacf80e8fa536716e18d7ba890f5c257fc3
Next block
000000ea3d2ce3a7dd537eabba3242b5fe49d0659829c1515fdecfb90d52f5ab

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 19777 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
9972420ceb1e7f6d6af4e69e13aae9bf… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
13a5954f437f…0029ec00d6be coinbase1250