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

Block 19748

Hash
0000005ff3a1467221402afee326f4bfad21d3bc9579b0292b6470352c9ee9a8
Confirmations
21689
Time
2026-10-10 21:41:32 UTC
Median time
2026-10-10 21:33:28 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2042e61499c65b78dfb2b6970a8fd5c54a09abef2e6a0cc9d9a8040a277ff4d3
Previous block
0000006361ba03cd451261ad7edb1dab88d50f4308a43f0b90efcb34b79fdf5a
Next block
000000bfe7d7fd16b836d6b37578c4e3a27c0cc834a2059bdc5ed89bc72072d5

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 19748 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
a8a544a8a90d2b3f036c7f0f559d9337… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2042e61499c6…040a277ff4d3 coinbase1250