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

Block 18315

Hash
000000a4595115a99a63fa322c8903d5d357eac54f278d1b926410aaec61fd5b
Confirmations
23890
Time
2026-10-09 05:37:49 UTC
Median time
2026-10-09 05:29:30 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
a27e33ec5c32e45f99dbd4f90c5d46225789a3c9012c11c86ece0fb1a89da23c
Previous block
0000009491810377d41415ef4694805b6be99b28f94dae211db2d0234a3d0081
Next block
0000003f80b549c88045b4277dda1c7cf88f5c0b6c74739ac0fb058f6bce90b2

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 18315 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
9e04572d695ddeb33c2952539be1d815… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
a27e33ec5c32…0fb1a89da23c coinbase1250