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

Block 18659

Hash
000000f90221354dcb707fb0adc4eb23c394ccb1e502eb324175b1bcb7fae3e9
Confirmations
23456
Time
2026-10-09 15:10:41 UTC
Median time
2026-10-09 15:02:16 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
db6d16bbaf51858d6b366f7117a6128f922949788dffc48c8888b386c73cc5b6
Previous block
000000b03fd89b45d153f0f8b1c685afcf79acde3d457f01cbbb77ce66ff436c
Next block
0000005ca390add5f132dbd19c12c3cd0b5dac0d7185c7cba623383c8178b9e4

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 18659 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
0fffd4b4267c47603e543fa71b94b9f7… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
db6d16bbaf51…b386c73cc5b6 coinbase1250