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

Block 19121

Hash
0000002808792a8ec19a3c48cb30fedd1267803beb22b2d292a057d9afd5d470
Confirmations
21355
Time
2026-10-10 04:08:43 UTC
Median time
2026-10-10 04:00:43 UTC
Transactions
3
Size
3,196
Weight
12,061
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
ab6d7d2546e5c11222c8e1136135bdddd41d734906a59eb54b9bd46bed1eb37a
Previous block
000000e86ab32865e3cb2c17d4018b86f218733026eef49e35343ad2f1490d7b
Next block
00000107da1c9d18c68ed20a0bae86e04838f17cd683aec29e66bfef1ffceb16

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 19121 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
6e0f3b806af12bd944ba693a25d73b78… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f92efa7a6809…7ab44ffcae98 coinbase1250.0000148
2a2fae349cd6…e65a6df23d1e spends P2MR110.00998830.0000117
673da7bef809…694fa30227ec pays to P2MR1222.9999130.0000031