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

Block 18980

Hash
0000001fca3a70725af730810685317cabb91a5271e5349012f7d8869b6f33d0
Confirmations
21985
Time
2026-10-10 00:06:05 UTC
Median time
2026-10-09 23:56:46 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
e23c7201f3a05307861d31d81dbf85012ea9abc0d1ca335b8cf243d8faba9852
Previous block
00000085f697365f069c38fb91513e8c1b7e9a3bd8c4d76c0757dee178edb81e
Next block
000000a21b244cd838d6e0b00f8aa3b2f1c68315acfea0c66be16102dc8b71d1

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 18980 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
3487f450f428495f54a2e11c14436e6f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
e23c7201f3a0…43d8faba9852 coinbase1250