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

Block 19717

Hash
00000090e72628d93d40df50dc8fc2604ed4e9dfa861153022f5444db10bba58
Confirmations
21778
Time
2026-10-10 20:49:10 UTC
Median time
2026-10-10 20:40:59 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f85a71e159aeff54476888b6e3254862a1b3e4e7d13dafb59e99f2737f6745ea
Previous block
000000e2963270596e9e387621fe381ddac2774f261e65efc816175b5eb6e277
Next block
000000a37062084762bdd976d56891e5ba43d26539bc77984beed6991a2d89f4

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 19717 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
f0a9214a68b8b2f40f64b0c96f54ea7b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f85a71e159ae…f2737f6745ea coinbase1250