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

Block 18773

Hash
0000004553f49c45c100b2e62975f43c2e7fe1af52696b7925fea6a4af890ae2
Confirmations
23519
Time
2026-10-09 18:19:02 UTC
Median time
2026-10-09 18:10:26 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
404ff1907a9a57a9c2b4f0ecb5e1a7324eb6736d70ab4a8d285e844ea4e4d644
Previous block
000000f8c1d043c40c633ebfdc27084008d65d1574f18a1a2d0500099d5fa8c8
Next block
0000011500e3aecb6c7cad97f0d47ca1c38b3ffb22707e75981c9b42bf37e76b

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 18773 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
72f378b60bbf11bb7bd7cc528aede836… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
404ff1907a9a…844ea4e4d644 coinbase1250