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

Block 18655

Hash
000000f7b25172c64753b880d76300615c216f478598d7e244035dcb2551b2fb
Confirmations
23589
Time
2026-10-09 15:04:10 UTC
Median time
2026-10-09 14:55:35 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
1feb4943c98eb2e2375723ad7dfcb1e0bb4d1c4490e4e1a7a00ef273e41bab8c
Previous block
000000e368ddff57116670ad137171c1c8b7c2fa8bb2c7fb9f49d9d73aaccb7f
Next block
0000009a0fbaca9bc0e453c9ad060c4408182f9a14aaa61b053a325b2bda8d88

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 18655 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
ab78e2c3a8b9ad26ff216f3afa2e2ccc… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
1feb4943c98e…f273e41bab8c coinbase1250